UPS4E
Loop Calibrator
User Manual
Druck.com

About This Manual
INFORMATION Read this manual carefully before use. Keep for future reference.
This manual contains operating instructions that you must follow to make sure of safe operation and to maintain the equipment in a safe condition.

Safety

RISK OF ELECTRIC SHOCK Do not apply voltage or currents to the Calibrator that are greater than shown in the specifications.
WARNING Do not store or use the Calibrator in temperatures outside its specified range. Temperatures outside the specified range can cause damage to the batteries and Calibrator. The batteries can leak.
CAUTION Remove or replace the batteries immediately if they are exhausted.
Recycle them according to your local regulations.
Check the Calibrator for damage before each use. Do not use if the Calibrator has damage.
The Calibrator is a portable instrument for use in indoor environments and temporary use in outdoor environments. It is not for permanent installation in an outdoor environment.
We have designed this equipment to be safe when operated using the procedures shown in this manual. Do not use this equipment for any other purpose than that stated, as the protection provided by the equipment may not work.
For a complete list of safety information, refer to the Quick Start and Safety Manual supplied with the Calibrator. Refer to our website for supporting documents. www.druck.com
Technical Advice
Contact the manufacturer for technical advice. See rear pages for contact details.
Symbols

Symbol	Description
	This equipment meets the requirements of all relevant European safety directives. The equipment carries the CE mark.
	Druck is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE) take-back initiative (directive 2012/19/EU). The equipment that you bought has required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment. In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle most of the materials of your end life equipment in a sound way. The crossed-out wheeled bin symbol invites you to use those systems. If you need more information on the collection, reuse, and recycling systems, please contact your local or regional waste administration. Please visit the link below for take-back instructions and more information about this initiative.

https://druck.com/weee

Glossary

This manual uses the following terms. Abbreviations are the same in the singular and plural.

Term	Description
CSV	Comma-separated Values
DC	Direct current
FS	Full Scale
DUT	Device Under Test
HART	Highway Addressable Remote Transducer
mA	Milliampere
max	Maximum
min	Minute or minimum
MSC	Mass Storage Class – USB
PC	Personal Computer
ppm	Parts per million
PIN	Personal Identification Number
Rdg	Reading
USB	Universal Serial Bus
V	Volts
VCP	Virtual Com Port – USB
°C	Degrees Celsius
°F	Degrees Fahrenheit

What’s in the Box
When you receive the product, check the box contents for these items:

• UPS4E Calibrator.
• 4 x AA Alkaline batteries.
• 2 m USB cable type A to C. Druck Part IO-USB-C-CABLE
• Test leads. Druck Part 209-359.
• Quick Start Guide. Druck Part 183M0493-1.

Note: We recommend that you keep the box and packaging for future use.
Optional Items
Refer to Datasheet for any spares or accessories.

Introduction and Description

1.1 Introduction

The Druck UPS4E Calibrator is a pocket-size battery-operated hand-held instrument for voltage measurement and measurement and sourcing of electrical current for test and calibration of devices such as flow and pressure sensors or valves. It includes a simple continuity test function and can log test data for viewing on a suitable PC. The Calibrator also has advanced current output features.
1.2 Description

1. Screen
2. Buttons and Navigation Pad
3. USB Type C Connector
4. Red and Black Connection Sockets
5. Buzzer
6. Mode button.
7. Power button.
8. Advanced button.
9. Up, down, left and right Navigation Pad buttons.
10. Enter button.

The Calibrator has a custom segment monochrome LCD screen that shows the measured values of voltage and current. It has a Navigation Pad and three buttons for user input and operation of the Calibrator. The top of the Calibrator case has two 4 mm connection sockets and a buzzer. The buzzer operates for continuity tests and to confirm some actions – for example, when energizing the Calibrator. The bottom of the case has a USB type C socket for connection to a suitable PC or USB power source.

1.3 Screen Symbols and Terms
The display screen has pre-defined symbols and terms. You will not see all these symbols and terms at the same time. They will change, determined by how you use the Calibrator. Figure 1-3 shows the screen with all symbols and terms.

Table 1-1: Screen Symbols and Terms

Symbol/Term	Description
	Battery level indicator – shown when using battery power.
	Flashes empty when the battery level is low.
CAL	Shown when in calibration mode or setting the calibration date.
CAL UDE	Shown when the calibration is due.
	Setting – shown when you enter the Setting menu.
INT	Shown when setting the Data log interval.
mA	Milliampere or current measuring enabled.
	Shown when setting the date. DD = Date MM = Month YYYY = Year For example: 24 10 2025
DAYS	Shows the amount of days until calibration is due.
	Backlight – shown when setting the backlight in the settings.
	Information – shown when viewing information in the settings.
‰	Auto Off – shown when setting the Auto Power off options. Percentage.
V	Voltage or voltage measuring enabled.
	Measure mode enabled.
	Source mode enabled.
24 V	24 V loop power enabled.
	Continuity test enabled.
MAN	Manual current output enabled.
LIN	Linear profile enabled.
FLOW	Flow profile enabled.
VALVE	Valve profile enabled.
AUTO	Automatic current output enabled – used with Step and Ramp function.
	Step function enabled.
	Ramp function enabled.
SPAN	Span check profile enabled.
	Up and down indicators to show the direction of the changing primary reading. Also work as maximum and minimum indicators.
	PIN Lock – enabled when entering the PIN in restricted modes.
0 to 20mA 4 to 20mA	Current Range: 0 to 20 or 4 to 20 milliampere.
RANGE	Shown when setting the 0 to 20 mA or 4 to 20 mA range.
MIN	Minimum.
MAX	Maximum.
250Ω	Internal 250 ohm resistor enabled.
ADJ	Adjust – used in the calibration procedure.
SET	Used in the calibration procedure and some other settings.
LOG	Enabled when setting data log and while logging data.
TIME	Enabled when setting the time.
CHEAK	Used in the calibration process.
HH:MM:SS	Hours, minutes and seconds. For example 16:50:32
APPVER	Application version.
	Universal Serial Bus Port.
VCP	Virtual Comm Port – USB mode.
VCP	The mode is MSC if VCP is not shown.
FW UPDATE	Firmware Update – enabled when updating the firmware.

1.4 Calibrator Features
1.4.1 Power and USB Connection

The Calibrator can be battery or USB-powered. The internal batteries supply power to the Calibrator if it is not supplied through the USB connection. When using battery power, you will see the battery level indicator. When using USB power, you will see the USB symbol in the screen and the battery symbol will go off.
You can supply power to the Calibrator through the USB connection using a suitable mains-to USB adapter, or a connected computer.
See “Specifications” for USB details.
When connected to a computer, the computer can supply power to the Calibrator and can access the internal memory of the Calibrator to open measurement data logs or update the Calibrator firmware.
INFORMATION The measurement circuits of the UPS4E are referenced to it’s USB socket, so if connected to a ground referenced USB supply, this may affect measurements. For optimum performance we recommend disconnecting the USB connection and using battery power only when doing measurements.
Notes:

• The USB connection does not recharge the Calibrator batteries, so do not use rechargeable batteries.
• We do not supply a mains-to-USB adapter with the Calibrator. Refer to “Specifications” on page 45 for USB power details.

1.4.2 Battery Low Warning

The Calibrator shows a warning when the battery drops to a low level. See the “Specifications” on page 45 for the low level voltage. In this case, the battery symbol will flash.
CAUTION Remove or replace exhausted batteries immediately. Recycle them according to your local regulations.
1.4.3 USB Virtual Comm Port (VCP) and Mass Storage Class (MSC) Protocols

The USB connection can work in a choice of two USB protocols. VCP is the default mode. It sets the USB socket to work as a communications port for direct communications with your PC to make the initial connection. MSC mode lets your PC see the internal memory of the Calibrator as a storage device, so you may see and download data log files or transfer files.
1.4.4 Current Source and Measurement
The Calibrator can work as a current source to control and measure the current in a loop containing a device such as a valve, with or without an external supply. It will also work as a measurement-only instrument where external devices control the loop supply current.
1.4.5 Primary and Secondary Readings

The Calibrator has two sets of readings; the primary reading (1) and the secondary reading (2).
The primary reading shows the measured value in units of milliamperes or volts. It can also show text for some operations, settings and calibration. The primary reading can flash for few seconds during some measurements until the Calibrator measurement circuits determine that the value has stabilized or the value is out of range or that the loop is open. The secondary reading shows the measured value as a percentage of the range you have selected. This is also true for reversed (negative) readings. The calibration procedures use the secondary reading when setting calibration values.
Note: The advanced options can affect the secondary reading percentage value relationship with the measured value shown in the primary reading. For example 8 mA = 50% with FLOW selected or 8 mA = 25% with LIN selected in the 4-20 mA range.
1.4.6 Positive and Negative Measurement
The Calibrator has red (positive) and black (negative) connections to show polarity of connection, but it will measure in both positive and negative polarity. The primary and secondary readings will show a negative symbol for reverse polarity readings.
Note: Current sourcing is only in positive polarity.
1.4.7 Current Range Selection
The Calibrator has two current range options: 4-20 mA or 0-20 mA.
1.4.8 Date, Time and Calibration Date
You can set the current date and time in the Calibrator and the calibration date. The Calibrator can then calculate how many days until calibration is due. The screen will show ‘CAL DUE’ when calibration is due.
1.4.9 Backlight

The screen of the Calibrator has a backlight for use in dark areas. The backlight has three settings, ON, OFF or AUTO. See “Settings – Backlight and Auto Power Off” on page 16 for more detail.
1.4.10 Auto Power Off
To save battery energy, this feature de-energizes the Calibrator after ten minutes of no button pushes.
Note: The Calibrator disables the Auto Power Off feature when you use data logging or when using USB power.
1.4.11 Selectable Internal Loop Resistor and 24 V Supply

In a process control or measurement loop, a resistor of between 230 and 600 ohm is necessary for communications to work correctly with HART instruments.
The Calibrator has an internal 24 V supply and a nominal 250 ohm loop resistance in series that you can enable or disable. The Calibrator can then work as a loop supply, resistor and measuring instrument, so an external resistor and loop supply is not necessary. You can disable one or both of these features if you have an external voltage source and resistor.
Note: You must enable the internal 24 V supply or have an external loop supply for the Calibrator to control current.
1.4.12 Calibrator Information

Use the Calibrator Settings to show important Calibrator information such as the firmware version (APP VER) or battery voltage of the Calibrator. See “Settings” for more details.
1.4.13 Data Logging
The Calibrator can log the data from your tests at set intervals and durations. See “Data Logging” on page 32 for more details.
1.4.14 Calibration
The Calibrator has a PIN-protected procedure for checking and adjusting its calibration using suitable external calibration equipment. See “Calibration Procedures” on page 35 for more details.
1.4.15 Firmware Update
The Calibrator has a PIN-protected procedure for upgrading its firmware using a suitable PC and the USB cable supplied with the Calibrator. See “Updating the Firmware” on page 48.
1.5 Operation Modes and Advanced Options

The upper part of the screen shows the operation mode and advanced option symbols. You can select basic operation modes of measure or source, with or without the internal 24 V supply enabled. The advanced options give different ways to change the source current. See “Operation Modes and Advanced Options” on page 19 for more details.
1.5.1 Continuity Test Mode

The Calibrator can work as a simple continuity tester. When connected to a device under test (DUT) the Calibrator will operate its buzzer if the DUT has a resistance of less than approximately 100 ohms.
The primary reading will show or circuit.
1.5.1.1 Manual, Linear, Flow and Valve Profiles

You can select different profiles for the Calibrator:

• ‘MAN’ – Manual, where you manually set the loop current to any value.
• ‘LIN’ – Linear, where the loop current changes in a linear way to simulate linear transmitters.
• ‘FLOW’ and ‘VALVE’ – where the loop current changes in a non-linear way to simulate flow transmitter and valve control signals.

See “Specifications” on page 45 for the preset values.
Note: These options can affect the secondary reading percentage value relationship with the measured value shown in the primary reading, even in measure mode. For example 8 mA = 50% with ‘FLOW’ selected or 8 mA = 25% with ‘LIN’ selected in the 4-20 mA range.
1.5.2 RAMP, ‘AUTO’ RAMP, STEP and ‘AUTO’ STEP

The RAMP symbol shows that the output current will gradually change in value from minimum to maximum of the selected range over a specified time that you can set. You start the ramp using the Navigation Pad buttons. ‘AUTO’ RAMP automatically cycles the output current over the specified time. With RAMP selected, the Calibrator calculates the values and rate of change, based on the specified time.
The STEP symbol shows that the output current will change in steps of preset values from minimum to maximum of the selected range over a specified time that you can set. You change the steps using the Navigation Pad buttons. ‘AUTO’ STEP automatically cycles the output current in preset values over the specified time.
See “Advanced Options (‘AUTO’ STEP, STEP, ‘AUTO’ RAMP, RAMP and ‘SPAN’ check)” on page 25 for more details.
See “Specifications” on page 45 for the preset step values.
Note: The ‘VALVE’ profile option does not have the RAMP function.
1.5.3 ‘SPAN’ Check
This option lets you manually set the current source output directly from minimum to maximum of the range and back using the buttons of the Navigation Pad. This will do a full span check.
See “Advanced Options (‘AUTO’ STEP, STEP, ‘AUTO’ RAMP, RAMP and ‘SPAN’ check)” on page 25 for more details.

Operation

This chapter shows how to set and operate the features of the Calibrator.
2.1 Power On and Off

• To energize the Calibrator, push the Power button until the screen operates. It will normally operate the buzzer, show the UPS4E text then show a typical opening screen. See Figure 2-3. If this is the first use of the Calibrator after fitting new batteries, it will ask you to enter the date and time. See “First Use – Date and Time”.
• To de-energize the Calibrator, push the Power button for more than two seconds and release. The screen will go off.

2.2 Connecting by USB

1. Use the USB cable supplied with the Calibrator. Connect its smaller USB C plug into the USB connection on the bottom of the Calibrator. See Figure 1-4 on page 5.
2. Connect the USB A plug into a USB type A socket of your computer, or into the output socket of a suitable mains to USB adapter. See “Specifications” for power details.
3. Energize the PC or USB adapter and the Calibrator.

2.3 First Use – Date and Time

When you first energize a Calibrator after fitting new batteries (or the batteries have been removed for longer than approximately seven minutes), the Calibrator will automatically enter the Settings to ask you to set the current date and time. It can then compare this with the calibration date to calculate and show how many days until calibration. The default date will be the build date set in the factory. You can adjust the calibration date in the Settings. Refer to “Setting – Calibration Date” on page 18.

1. The screen will show the Settings symbol and flash the DATE day (DD). Use the Navigation up and down buttons to change the date.
2. Push the Enter button to accept the date.
3. The screen will sequentially show the month (MM), year (YYYY), TIME hours (HH) and minutes (MM). At each step, use the Navigation Pad up and down buttons to change the values. Push the Enter button to accept the values and move onto the next value.
4. Finally, the screen will show the amount of ‘DAYS’ until the calibration is due (CAL DUE), based on the calibration date. See “Setting – Calibration Date” on page 18.

2.4 Typical Opening Screen

After you have set the date and time, the Calibrator will show an opening screen that flashes the mA and source symbols, asking you to select an operation mode such as mA source or measure. It will show the same opening screen each time you energize it.
2.5 Settings

The Calibrator has settings that you can change, such as the backlight or measuring range. When you open the settings, the screen shows the Settings symbol in the top right.
2.5.1 To Open the Settings

1. To open the settings, push both the up and down Navigation Pad buttons together. The screen will show the Settings symbol.
2. Use the Navigation Pad buttons to go through the settings and make any changes as shown in the following pages.
3. Push the ‘MODE’ button at any time to escape the Settings or to return to the opening screen.

2.5.2 Settings – Range and 250 ohm Internal Resistor

1. Open the Settings.
2. The screen will show ‘RANGE’. If not, then push the right hand Navigation Pad button until the screen shows ‘RANGE’. It will flash.
3. Push the Enter button to accept that you are to select the range.
4. Push the up and down Navigation Pad buttons to select 0-20 mA or 4-20 mA.
5. Push the Enter button to save the range setting.
6. Push the right hand Navigation Pad button until the screen shows 250 Ω.
7. Push the Enter button to accept that you are to select the resistor.
8. Push the up and down Navigation Pad buttons to select ‘ON’ or ‘OFF’.
9. Push the Enter button to save the setting.

2.5.3 Setting – Data Logging
Refer to Section 3.7 on page 32.
2.5.4 Setting – USB

1. Open the Settings.
2. Push the right hand Navigation Pad button until the screen shows ‘SET’ and the USB symbol . It will flash.
3. Push the Enter button to accept that you are to set the USB mode.
4. Push the up or down Navigation Pad buttons to select VCP on or off. If VCP is not shown, then the mode is MSC. VCP is the default mode.
5. Push the Enter button to accept your changes.

2.5.5 Settings – Backlight and Auto Power Off

1. Open the Settings.
2. Push the right hand Navigation button until the screen shows the backlight symbol. It will flash.
3. Push the Enter button to accept that you are to set the backlight.
4. Push the up and down Navigation buttons to select ‘Auto’, ‘ON’ or ‘OFF’.
   • ON – the backlight is on at all times while the Calibrator is energized
   • OFF – the backlight is never on
   • AUTO – the backlight remains on for ten seconds after the last button has been pushed while the Calibrator is energized
5. Push the Enter button to save the Backlight setting.
6. Push the right hand Navigation button until the screen shows ‘AUTO OFF’. It will flash.
7. Push the Enter button to accept that you are to set the auto power off.
8. Push the up and down Navigation buttons to select ‘ON’ or ‘OFF’.
9. Push the Enter button to save the setting.

2.5.6 Setting – Viewing Calibrator Information

1. Open the Settings.
2. Push the right hand Navigation button until the screen shows the Information symbol .
   It will flash.
3. Push the Enter button to accept that you are to view information.
4. Push the up and down Navigation buttons to select the information that you need to see, for example:
   • Software version APPVER
   • Battery voltage V
   • 250 ohm resistor on or off
   • Calibration date
5. Select the ‘MODE’ button to return to normal operation.

2.5.7 Setting – Calibration
Refer to Section 4 on page 35.
2.5.8 Setting – Calibration Date

1. Open the Settings.
2. Push the right hand Navigation Pad button until the screen shows the ‘DATE’ and ‘CAL’ symbols. They will flash.
3. Push the Enter button to accept that you are to set the calibration date.
4. The screen shows the PIN symbol to let you know that you must enter the four digit PIN 4321 to continue to set the calibration date. Use the left and right Navigation Pad buttons to select each digit and use the up and down Navigation Pad buttons to change the number of each digit. Then push Enter.
5. Push the left and right Navigation Pad buttons to select day (DD), month (MM) or year (YYYY). They will flash.
6. Push the up and down Navigation Pad buttons to change the value of the day, month or year.
7. Push the Enter button each time to accept your changes.
8. The Calibrator will now use this date to calculate the days until the calibration is due.

2.5.9 Setting – Firmware Update
Refer to “Updating the Firmware” on page 48.
2.5.10 Setting – Date and Time
Refer to “First Use – Date and Time” on page 12.
2.6 Operation Modes and Advanced Options

You use the ‘MODE’ button to select the operation modes of the Calibrator. For example, current or voltage measuring or current sourcing. Select the Enter button to accept the mode and escape to the Advanced Options.
2.6.1 Current Measuring Mode – External or Internal Loop Supply

This is for use when the external device under test controls the loop current.

1. Push the ‘MODE’ button until the screen shows the current symbol mA and the measure mode symbol.
2. For internal loop supply, push the ‘MODE’ button again until the screen shows the 24 V symbol.
3. Push the Enter button to accept your changes.
4. Now select the Advanced Options of ‘LIN’ or ‘FLOW’ to change the way the secondary reading shows percentage value as necessary. See “Advanced Options (MAN, LIN, FLOW and VALVE)” on page 23.

2.6.2 Current Source Mode – External or Internal Loop Supply

This is for use when the Calibrator controls the loop current.

1. Push the ‘MODE’ button until the screen shows the source mode symbol and the current symbol mA.
2. For internal loop supply, push the ‘MODE’ button again until the screen shows the 24 V symbol.
3. Push the Enter button to accept your changes.
4. Now select the Advanced Options. See “Advanced Options (MAN, LIN, FLOW and VALVE)” on page 23.

2.6.3 Voltage Measuring and Continuity Test Modes

1. Push the ‘MODE’ button until the screen shows the measure mode symbol and the voltage symbol V.
2. Push the Enter button to accept your changes.
3. To change to continuity test, select the ‘MODE’ button again until the screen shows the Continuity Buzzer symbol.
4. Push the Enter button to accept your changes. There are no Advanced Options for these modes.

2.6.4 Advanced Options (MAN, LIN, FLOW and VALVE)

From a current source mode:

1. Push the ADV button.’
2. Use the ADV (Advanced) button to go through the profile options of ‘MAN’, ‘LIN’, ‘FLOW ‘or ‘VALVE’. This will change how the Calibrator controls the output current and how the secondary reading shows the percentage.
3. Push the Enter button to accept your selection.

From a current measure mode:

1. Push the ADV button.
2. Use the ADV (Advanced) button to go through the profile options of ‘LIN’ or ‘FLOW’. This will change how the secondary reading shows the percentage.
3. Push the Enter button to accept your selection.

2.6.5 MAN (Manual) Operation

1. Select the ‘MAN’ profile.
2. You can now manually enter a value to output. Use the Navigation Pad up, down, left and right buttons to select each digit in the primary reading and change it’s value.
3. Push the Enter button to accept the value. The secondary reading will show the value as a percentage of range.
4. The Calibrator can now control the loop current at the value you have set. Remember that you must select the internal 24 V supply or have an external supply in the loop. The primary reading will flash if there is no loop current.

2.6.6 Advanced Options (‘AUTO’ STEP, STEP, ‘AUTO’ RAMP, RAMP and ‘SPAN’ check)

1. From a current source profile option of ‘LIN’, ‘FLOW’ or ‘VALVE’ profile, push the Enter button.
2. Use the Navigation pad left and right buttons to go through the options of ‘AUTO’ STEP, STEP, ‘AUTO’ RAMP, RAMP and ‘SPAN’ check.
3. Push the Enter button to accept your selection.
   Note: The ‘VALVE’ profile option does not have the Ramp function.
4. For the ‘AUTO’ STEP, RAMP and ‘AUTO’ RAMP functions you must then use the Navigation Pad buttons to set the time interval, followed by the Enter button to accept your selection.
5. For the ‘AUTO’ STEP functions, the output will now change through the preset steps over the time interval you have set. It will continue the cycle until you de-energize the Calibrator or change mode. You may push the Enter button to pause the function. Push again to restart.
6. For the ‘AUTO’ RAMP function, the output will now change over the time interval you have set. It will continue the cycle until you de-energize the Calibrator or change mode. You may push the Enter button to pause the function. Push again to restart.

• In STEP mode, use the Navigation Pad up and down buttons to manually step through the preset output current values.
• In RAMP mode, use the Navigation Pad up and down buttons to manually start the ramp which will automatically go up or down through the calculated output current values.
• In ‘SPAN’ check mode, use the Navigation Pad up and down buttons to change directly from the maximum to minimum output current values and back.

Notes:

• Remember that you must either select the internal 24 V supply or have an external supply in the loop for the Calibrator to work.
• See “Specifications” on page 45 for ‘LIN’, ‘FLOW’ and ‘VALVE’ preset values of current.

Connections and Tasks

The section gives typical details of how to connect the Calibrator for a given task. Before starting, read the safety precautions contained in the ‘Safety & Quick Start Guide’.
3.1 DC Current Measurement or Source – External Supply
CAUTION External supplies must be no more than 30 VDC.
Set the Calibrator correctly to measure or source as necessary before connecting it to a device under test.

1. Set the necessary RANGE in the Calibrator. For example 4-20 mA.
2. Set the Calibrator to measure or source current. Do not enable the internal 24 V loop power.
3. Select the Advanced Options you need, for example ‘LIN’ output, and ‘FLOW’.
4. Connect the cables to the unit under test and the external supply as shown.
5. The primary reading will show you the loop current.
6. If sourcing current, use the Navigation Pad buttons to change the source current, then press the Enter button.
7. The primary reading can flash for a few seconds until the Calibrator measurement circuits determine that the value has stabilized.

3.2 DC Current Measurement or Source – Internal 24 V Supply

1. Set the necessary RANGE in the Calibrator. For example 4-20 mA.
2. Set the Calibrator to measure or source current with internal 24 V loop power.
3. Select the Advanced Options you need, for example ‘LIN’ output, and ‘FLOW’.
4. Connect the cables to the unit under test as shown.
5. The primary reading will show you the loop current.
6. If sourcing current, use the Navigation Pad buttons to change the source current, then press the Enter button.
7. The primary reading can flash for a few seconds until the Calibrator measurement circuits determine that the value has stabilized.

3.3 DC Current Measurement or Source – External Supply and Resistor
CAUTION External supplies must be no more than 30 VDC.

1. Set the necessary RANGE in the Calibrator. For example 4-20 mA.
2. Set the Calibrator to measure or source current with an external supply. Do not enable the internal 24 V source or 250 ohm resistor.
3. Select the Advanced Options you need, for example ‘LIN’ output, and ‘FLOW’.
4. Connect the cables to the unit under test, the HART device and the external source as shown.
5. The primary reading will show you the loop current.
6. If sourcing current, use the Navigation Pad buttons to change the source current, then press the Enter button.
7. The primary reading can flash for a few seconds until the Calibrator measurement circuits determine that the value has stabilized.

3.4 DC Current Measurement or Source – Internal 24 V Supply and Resistor

1. Set the Calibrator to measure or source current with internal 24 V supply and 250 ohm resistor.
2. Set the necessary RANGE in the Calibrator. For example 4-20 mA.
3. Select the Advanced Options you need, for example ‘MAN’ or ‘LIN’ output, and ‘AUTO’ STEP or ‘SPAN’.
4. Connect the cables to the unit under test and the HART device (if used) as shown.
5. The primary reading will show you the loop current.
6. If sourcing current, use the Navigation Pad buttons to change the source current, then press the Enter button.
7. The primary reading can flash for a few seconds until the Calibrator measurement circuits determine that the value has stabilized.

3.5 DC Voltage Measurement 0 – 30 VDC
CAUTION Voltage sources must be no more than 30 VDC.

1. Set the Calibrator to measure voltage. See “Voltage Measuring and Continuity Test Modes” on page 22.
2. Connect the cables to the voltage supply as shown.
3. The primary reading shows the measured voltage.

3.6 Continuity Test

1. Set the Calibrator to Continuity test. See “Voltage Measuring and Continuity Test Modes” on page 22.
2. Connect the cables to the device under test (DUT) as shown.
3. If the DUT has a resistance of less than 100 ohms, the Calibrator buzzer will operate and the primary reading will show ‘Short’ (short-circuit). If the DUT has a resistance higher than 1000 ohms, the buzzer will not operate and the primary reading will show ‘Open’ (open circuit).

3.7 Data Logging
Use the Calibrator Settings to log the data from your tests until you manually stop the logging or de-energize the Calibrator. The Calibrator will store the data internally in *.CSV file format, so you can then load it to a suitable PC for inspection. To read the log files, your computer must have a suitable spreadsheet application installed, such as Microsoft Excel.
Note: The Calibrator disables the Auto Power Off feature when you use data logging.
3.7.1 Setting – Data Log Time (Interval and Duration)

1. Set the Calibrator into the measurement or source mode you wish to use and connect it to the test loop.
   Note: You cannot change the operation mode while the Calibrator logs data. You must stop and restart the data log if you need to change the operation mode.
2. Open the Settings.
3. Push the right hand Navigation button until the screen shows LOG. It will flash.
4. Push the Enter button to accept that you are to set the log interval and duration.
5. You first set the interval. The screen shows INT. Push the left and right Navigation buttons to select minutes (MM) and seconds (SS). Push the up and down Navigation buttons to change the digits for minutes or seconds.
6. Push the Enter button to save the interval time.
7. Now set the duration. Push the left and right Navigation buttons to select minutes (MM) and hours (HH). Push the up and down Navigation buttons to change the minutes or hours.
8. Push the Enter button to save the interval and duration and start the Data Logging. The Calibrator will return to the opening screen.
9. The LOG symbol will flash and the Calibrator will automatically log your measurements at the interval and duration of time that you have set. You can manually stop it by pressing the MODE or ADV buttons or de-energize the Calibrator.

3.7.2 Viewing the Data Log

1. Disconnect the Calibrator from the test loop.
2. Use the cable supplied to connect the Calibrator to a suitable PC.
3. In the Calibrator Settings, set the USB connection to MSC mode. See “Setting – USB” on page 16.
4. The PC will see the Calibrator internal memory as a mass storage device.
5. Use a file explorer application on the PC to examine the Calibrator internal memory for the Data Log folder that contains the files.
6. The Calibrator automatically gives each Data log file a date and time that it was recorded, in the format YYYY-MM-DD_HHMMSS. For example 2025-04-08_002113 is the year 2025 and the fourth month and the date of the 8th. The time is 21 minutes and 13 seconds past midnight.
7. Select the necessary file and open it with your spreadsheet application to examine it.
8. After use, use the PC to delete any unwanted Data log files from the Calibrator to empty its memory.

Calibration Procedures

Druck can provide a calibration service that is traceable to international standards. We recommend that you return the instrument to us or an approved service agent for calibration. If using an alternative calibration facility, check that it uses the same standards.
4.1 Before Starting

1. Check that the Calibrator battery level is at maximum. Consider changing to new batteries if not.
2. Make sure the calibration environment has a stable temperature of 21 ± 1°C (70 ± 2°F).
3. Make sure your calibration standard instrument has these ranges:
   • Current (mA) input and output range +/- 0 to 25 mA.
   • Voltage (V) output range 0 to +/- 30 VDC.
4. Put the Calibrator and calibration standard instrument in the calibration environment for a minimum of two hours.
5. Connect and energize the Calibrator and the calibration standard instrument using the cables supplied or equivalent high-quality cables.
6. Wait a few minutes for the Calibrator and other instruments to thermally stabilize. Consider changing the AUTO OFF setting to off to avoid disruption while waiting for readings to stabilize during calibration.

4.2 ‘ADJ’ (ADJUST) function
This function adjusts the Calibrator primary reading to the same value as the external calibration instrument when doing current source calibration. It is useful in current and voltage measure calibration when you use calibration values that are different to the preset values. The Calibrator will adjust itself to the external instrument value.
For example, if you need to calibrate measurement at a value of 18 mA instead of the preset 19.5 mA, set your external instruments to 18 mA and use the ‘ADJ’ function to adjust the calibrator to set the Primary reading to 18 mA.
4.3 ADV (ADVANCED) button polarity function
You can use ADV button to change the sign (polarity) of the primary reading when using the ADJ (ADJUST) function while doing calibration.
4.4 Calibration Notes
Push the ‘MODE’ button or de-energize the Calibrator to escape the calibration setting at any time. If the calibrator shows an error code at any time during the calibration (see “Error Codes and Warnings” on page 50) then it is likely that the calibrated value is incorrect. Push the Enter button to accept the error and redo the calibration.
4.5 Preset Calibration Values
INFORMATION The Calibrator has preset calibration values of current and voltage, but you may apply different values and use the ADJ (adjust) to change the reading in the Calibrator to match the applied value.
Table 4-1: Preset Calibration Values

Current Measure (mA) 20 mA range	Current Measure (mA) 24 mA range	Current Source (mA)	Voltage Measure(V) 20 V range	Voltage Measure (V) 30 V range
-19.5	-24	0.2	-20	-30
0	0	19.5	0	0
19.5	24	–	20	30
Check 1 mA	Check 24 mA	Check 1 mA	Check 20 V	Check 30 V

4.6 Deviation Tolerances
After calibration, go through the Set Point values as suggested in these tables and check that the deviation is within the permissible limits.
4.6.1 Current Measure

• 20 mA range: 12 ppmRdg + 56 ppmFS
• 24 mA range: 22 ppmRdg + 86 ppmFS

Table 4-2: Current Measure Set Point and Deviation Tolerance

Set Point (mA)	Permissible Deviation (mA)
-24	±0.002592
-22	±0.002548
-20	±0.002504
-10	±0.00124
-5	±0.00118
0	±0.00112
5	±0.00118
10	±0.00124
20	±0.002504
22	±0.002548
24	±0.002592

4.6.2 Current Source

• 20 mA range: 13 ppmRdg + 68 ppmFS
• 24 mA range: 22 ppmRdg + 86 ppmFS

Table 4-3: Current Source Set Point and Deviation Tolerance

Set Point (mA)	Permissible Deviation (mA)
0.6	±0.00136
6	±0.00143
12	±0.00151
18	±0.00159
24	±0.0025

4.6.3 Voltage Measure

• 20 V range: 10 ppmRdg + 69 ppmFS
• 30 V range: 10 ppmRdg + 79 ppmFS

Table 4-4: Voltage Measure Set Point and Deviation Tolerance

Set Point (V)	Permissible Deviation (V)
-30	±0.00267
-21	±0.00258
-20	±0.00257
-10	±0.00148
-5	±0.00143
0	±0.00138
5	±0.00143
10	±0.00148
20	±0.00257
21	±0.00258
30	±0.00267

4.7 Calibration Flow

Note: *The Calibrator will ask for the CAL date and time if it has not already been set.
4.8 Procedure 1: Unlock PIN for Calibration

1. On the Calibrator, enter the Settings and select the CAL (calibration) option. See “Setting – Calibration” on page 18.
2. The CAL symbol will flash. Push the Enter button.
3. The screen will show the Lock symbol and the primary reading will change to a set of four digits for the PIN.
4. Use the Navigation Pad to enter the correct PIN 4321. The left and right buttons will select the digit to be changed and the up and down buttons will change the value of the digit.
5. Push the Enter button to accept the correct PIN. The screen will cancel the Lock symbol.
   Note: If you have not already entered the calibration date, the Calibrator will ask you to enter it before doing the calibrations. See “Setting – Calibration Date” on page 18.
6. You will now have the choice of calibrating current measure, current source or voltage.

4.9 Procedure 2: Current (Measure)

1. When you select this option the mA and measure symbols will flash. Use the Navigation left and right buttons to move to the next calibration procedure or push the Enter button to accept. The screen will show the SET symbol.
2. The Calibrator will take you through two ranges; one uses steps of the preset calibration values for the 20 mA range, the second uses steps of the preset calibration values for the 24 mA range. The secondary reading will show the preset calibration values. At each step, set your external calibrator to the preset value, or to your preferred chosen value of calibration.
3. The primary reading will show the measured values at each step. Wait a few minutes to make sure the measured value remains stable before you push Enter to accept. The Calibrator will accept the applied current as a calibrated value and readjust itself.
4. The ADJ symbol will flash to allow you to adjust the primary reading to the same value as the current from the calibrated instrument using the Navigation Pad up and down and left and right buttons. This is useful if using calibrated values that are different to the preset values. You do not need to use this adjustment if you are using the preset values.
5. Push the Enter button to accept.
6. At the last steps, the Calibrator will recommend values of 1 mA and 24 mA and show CHECK. Apply the recommended value and push Enter to accept.

4.10 Procedure 3: Current (Source)

1. When you select this option the mA, source and 24 V symbols will flash. Use the Navigation left and right buttons to move to the next calibration procedure or push the Enter button to accept. The screen will show the SET symbol.
   Note: The Calibrator automatically selects the internal 24 V source for this calibration. You cannot deselect it.
2. The Calibrator will take you through steps of the preset calibration values. The secondary reading will show the preset calibration values. At each step, set your external calibrator to view the preset value.
3. This procedure is different to the others – the secondary screen will flash at each step to allow you to change the source current for calibration to a value different from the preset value if necessary.
4. Wait a few minutes to make sure the measured value at your external instrument remains stable before you push Enter to accept.
5. The ADJ symbol will flash to allow you to adjust the primary reading to the same value as the current measured at the external calibrated instrument using the Navigation Pad up and down and left and right buttons.
6. Push the Enter button to accept.

4.11 Procedure 4: Voltage (Measure)

1. When you select this option the V and measure symbols will flash. Use the Navigation left and right buttons to move to the next calibration procedure or push the Enter button to accept. The screen will show the ‘SET’ symbol.
2. The Calibrator will take you through two ranges; one uses steps of the preset calibration values for the 20 V range, the second uses steps of the preset calibration values for the 30 V range. The secondary reading will show the preset calibration values. At  each step, set your external calibrator to the preset value, or to your preferred chosen value of calibration.
3. The primary reading will show the measured values at each step. Wait a few minutes to make sure the measured value remains stable before you push Enter to accept. The Calibrator will accept the applied voltage as a calibrated value and readjust itself.
4. The ADJ symbol will flash to allow you to adjust the primary reading to the same value as the voltage from the calibrated instrument using the Navigation Pad up and down and left and right buttons. This is useful if using calibrated values that are different to the preset values. You do not need to use this adjustment if you are using the preset values.
5. Push the Enter button to accept.
6. At the last steps, the Calibrator will recommend values of 20 V and 30 V and show CHECK. Apply the recommended value and push Enter to accept.

4.12 Calibration Restore

This option restores the Calibrator calibration to it’s factory conditions. If the factory calibration conditions have been damaged or are missing, then the screen will show ‘FAIL’. If this happens, contact Druck for more details. If the restore works correctly, then the Calibrator will return to its factory calibration conditions.

1. When you select this option the primary reading will show ‘rESto’. Push the Enter button and the Calibrator will ask for a four digit PIN 4321.
2. Use the Navigation Pad up, down and left and right buttons to select and change the digits. Select Enter to accept. The primary reading will show ‘PASS’.

Specifications

Refer to the product Datasheet for a full specification of the Calibrator:
Druck.com
The Calibrator is suitable for indoor use with the following environmental requirements. It is also permitted to use outdoors as a portable instrument if the environmental requirements are met.

Item	Description
Dimensions	145 mm high x 73 mm wide x 25 mm
Weight	318 g including batteries
Display Screen	Custom Segment Monochrome Liquid Crystal Display
Measurement Ranges	0 mA to +/-24 mA +/-4 mA to +/-24 mA 0 V to +/-30 VDC
Internal Current Source	24 V and 24 mA maximum
Extemal Loop Supply limit	30 V maximum
Continuity Range	<100 ohm short circuit >1000 ohm open circuit
Internal HART loop resistor	Nominal 250 ohm
Operating Temperature range	-10 to 50°C (14 to 122°F)
Storage Temperature range	-20 to 70°C (-4 to 158°F)
Ingress Protection	IP54
Humidity range	0 to 90% relative humidity (RH) non-condensing.
ShockNibration	MIL-PRF-28800F for class 2 equipment.
Pollution Degree	2
EMC	Electromagnetic Compatibility: EN 61326-1:2013
Electrical Safety	EN 61010-1:2010 EN 61010-2-030:2023
Approvals	CE Marked
Battery Power	4 x Type AA Cells. Nominal voltage: 1.5 V each cell. Alkaline only. Not rechargeable.
Connectors	2 x 4 mm sockets
Linear Function preset steps	4, 8, 12, 16 and 20 mA (4-20 mA range) 0, 5, 10, 15 and 20 mA (0-20 mA range)
Flow Function preset steps	4, 5, 8, 13 and 20 mA (4-20 mA range) 0, 1.25, 5, 11.25 and 20 mA (0-20 mA range)
Valve Function preset steps	3.8, 4, 4.2, 12, 19, 20 and 21 mA (4-20 mA range) 0, 0.2, 10, 19, 20, 21 mA (0-20 mA range)
Auto Step, Ramp and Auto Ramp time	1 to 599 seconds
Auto Power Off	After 10 minutes of no button pushes (if enabled). Disabled if data logging or if USB power connected.
Data Log	Interval up to 1 min Duration up to 99 hours and 59 minutes CSV file format
Calibration Enter PIN	4321
Calibration Restore PIN	4321
Firmware Update PIN	5487
USB	Type C connector. USB 2 specifications. Power source to UPS4E must be 500 mA or greater.

Maintenance

THE EQUIPMENT CONTAINS NO USER SERVICEABLE PARTS. INTERNAL COMPONENTS MAY BE UNDER PRESSURE OR PRESENT OTHER HAZARDS. SERVICING, MAINTAINING, OR REPAIRING THE EQUIPMENT MAY RESULT IN DAMAGE TO PROPERTY AND SERIOUS PERSONAL INJURY (INCLUDING DEATH). THEREFORE IT IS PARAMOUNT THAT SERVICE ACTIVITIES ARE UNDERTAKEN ONLY BY A DRUCK AUTHORIZED SERVICE PROVIDER. REPAIR ACTIVITIES UNDERTAKEN BY UNAUTHORIZED PERSONNEL MAY INVALIDATE THE EQUIPMENT WARRANTY, SAFETY APPROVALS AND DESIGN CONDITION. DRUCK CANNOT BE HELD LIABLE FOR ANY DAMAGES (INCLUDING DAMAGE TO THE EQUIPMENT), MONETARY FINES, PROPERTY DAMAGE OR PERSONAL INJURY (INCLUDING DEATH) THAT MAY OCCUR DURING OR AS A RESULT OF SERVICE MAINTENANCE OR REPAIR WORK UNDERTAKEN BY AN UNAUTHORIZED SERVICE PROVIDER.
6.1 Cleaning
CAUTION Do not use solvents or abrasive materials.
Clean the case and screen with a lint-free cloth and a weak detergent solution.
6.2 Installing and Changing the Batteries

Note: Replace all four batteries at the same time.

1. Use a Posidrive screwdriver to unscrew the captive screws that secure the battery compartment cover. See Figure 6-1.
2. Remove exhausted batteries and insert new batteries into the compartment. Make sure battery polarities are as shown on the battery cover. Refer to “Specifications” on page 45 for battery types.
3. Replace the battery cover and secure the screws.
4. Push the Power button to check that the Calibrator works.

CAUTION Remove or replace the batteries immediately if they are exhausted. Recycle them according to your local regulations.
6.3 Continuity Check

There is no adjustment for the continuity calibration, so this is a simple procedure to make sure the continuity check works correctly.

1. Set the Calibrator to do a Continuity test. See “Voltage Measuring and Continuity Test Modes” on page 22.
2. Using the leads supplied with the Calibrator, connect both leads together and check that the Calibrator indicates a short circuit and the buzzer operates.
3. Disconnect the leads and make sure the Calibrator shows open circuit.
4. If the test fails, check the leads for damage and replace if necessary.

6.4 Updating the Firmware

There are two ways to update the firmware in the Calibrator. For both, you will need to connect the Calibrator to a suitable PC using the USB cable supplied with the Calibrator.
6.4.1 Method 1.

1. Your PC must have an internet connection.
2. Go to the UPS4E download portal on the Druck website and follow the instructions you find there. https://druck.com/software

6.4.2 Method 2.

1. You must have a copy of the latest firmware downloaded from the Druck website at https://druck.com/software and stored on your PC. The files can be in a zipped format, so you must unzip (extract) them before use.
2. Turn on the Calibrator.
3. Connect the Calibrator to the PC. The screen of the Calibrator will show the USB symbol and ‘VCP’.
4. Check the Settings on the Calibrator to make sure it is set for MSC. See “Setting – USB” on page 16.
5. On the PC, open a file explorer application. You will see the Calibrator as a mass storage device (UPS4E (D:) in the image), containing the Data log folder and the firmware (*.raw) file (DK0543.raw in this example). Delete the existing firmware file from the Calibrator and replace with the latest firmware file.
6. On the Calibrator, press the up and down Navigation Pad buttons together to open the Settings. Refer to “To Open the Settings” on page 15.
7. Use the Navigation buttons to select the FW UPDATE.
8. The screen will show the lock symbol asking for you to enter the four digit PIN number 5487. Use the Navigation Pad to select each digit and change its value. Then push Enter.
9. The primary reading will show Enter.
10. Push the Enter button. The Calibrator will restart, then start to load the new firmware while showing a counter that goes from 0 to 99%. It will then restart again.

6.5 Error Codes and Warnings
The Calibrator can show one of several error codes and warnings on the screen. These codes and warnings can warn you that you are using the Calibrator incorrectly or need to retry an operation.
6.5.1 Error Codes

Error Code	Cause and remedy
E01, E02, E03, E06	Software and hardware failures. Contact Druck service.
E04	Voltage out of range. Apply 0 to +/- 30 V
E05	Current out of range. Apply 0 to +/- 24 mA
E07	Firmware upgrade error. Try the upgrade again.
E13	Calibration error. Try the calibration again.
E14	PIN error. Try again with the correct PIN.
E15	Data logging error. Check that the Data log folder (memory) has sufficient space for the Data log file you are about to create. Delete unwanted Data log files.
E16	Check the external voltage applied, it should be within +/ 30 V. Push Enter to acknowledge the error. Contact Druck  Service if the error persists.

6.5.2 Warnings

Warnings	Cause and remedy
Lo Bat	Battery level critical. Change to new batteries or connect USB power source.
CAL DUE	Shown on the screen if it has been more than 365 days from the last device calibration date. We recommend that you calibrate the instrument when you see this, but this warning does not stop device operation.
No Fil	(No file found) errors. Shown on the screen if the firmware update cannot be done either due to low battery or no firmware file found in UPS4E. Change for fresh batteries if necessary or connect to a USB power source. Copy the correct firmware file again to the device.

6.6 Instrument Return
6.6.1 Return Goods/Material Procedure
If the unit requires calibration or is unserviceable, return it to the nearest Druck Service Centre.
See rear page.
Contact the Service Department to obtain a Return Goods/Material Authorization (RGA or RMA).
Provide the following information for a RGA or RMA:

• Product (e.g. UPS4E)
• Serial number.
• Details of defect/work to be undertaken.
• Calibration traceability requirements.
• Operating conditions.

6.7 Packaging for Storage or Transportation

1. Suitably pack the Calibrator and its cables. Re-use the original packaging if possible.
2. To return the instrument for calibration or repair, complete the return goods procedure. See Section 6.6. Return the instrument to the manufacturer or an approved service agent for all repairs.

Refer to “Specifications” for storage and transportation conditions.
Office Locations

https://druck.com/contact

Services and Support Locations

https://druck.com/service

Copyright 2025 Baker Hughes Company. This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries in one or more countries. All third party product and company names are trademarks of their respective holders.

183M0498 Revision
bakerhughes.com

Documents / Resources

Druck UPS4E Loop Calibrator [pdf] User Manual UPS4E, UPS4E Loop Calibrator, UPS4E, Loop Calibrator, Calibrator

References

• User Manual