Watchlog Bluetooth Digital Pressure Gauge & App Manual

Introduction

This operating manual provides comprehensive information for the Hydrotechnik UK Watchlog Bluetooth digital pressure gauge (DPG). It is intended for specialists and semi-skilled personnel involved in the inspection, adjustment, and calibration of pressure measuring equipment.

Please keep this manual for future reference. If the device is resold, the operating manual must be provided along with it.

Safety Instructions

Before installing or operating the DPG, it is crucial to read and understand this manual, especially the safety guidelines. Failure to comply could result in danger to people, the environment, the device, or the connected system.

Hazard Signs and Symbols

• ⚠️ WARNING! / CAUTION! Risk of injury!: Indicates dangers that can cause personal injury or considerable damage to property.
• ⚠️ CAUTION! Risk of injury in the case of excessive pressure!: Indicates dangers arising from excessive pressure.
• ⚠️ CAUTION! Material damage!: Indicates actions that could lead to material or environmental damage.
• ? NOTICE!: Indicates important notices, tips, or information.
• ? NO DOMESTIC WASTE!: The device must not be disposed of with domestic waste.
• [Adhere to operating manual]
• [Check specified points or notices]
• [Reference to another section, document, or source]

Qualified Personnel

Personnel responsible for installation, operation, and maintenance must hold relevant qualifications (training or tuition). They must be aware of this manual and have access to it at all times. Any electrical connection must be carried out by a fully qualified electrician.

General Safety Instructions

National and internal workplace safety regulations must be complied with. Ensure ambient conditions do not exceed stated protection ratings (refer to Section 9.2 Technical Specifications). Use the DPG only if it is in perfect condition; damaged or faulty devices must be checked and replaced if necessary. Use only suitable tools for fitting, connecting, and removing the DPG. Do not remove or obliterate type plates or markings, as this voids the warranty.

Special Safety Instructions

Specific warnings relevant to individual operating procedures are found at the beginning of relevant sections.

Device Overview

The DPGs are digital pressure manometers/gauges with actual value and MIN/MAX displays, housed in a rugged TPE+ABS casing. They feature a digital LCD display, control panel, and replaceable batteries. The gauges offer accuracies of ±0.2% relative to the full-scale reading (FS) and are used for measuring pressure in permanent installations or mobile applications, serving as a pressure reference for checking, adjusting, and calibrating other equipment.

Versions

Type Plate

The type plate, located on the back of the DPG, contains essential data such as the model (e.g., WLB-DPG-V001), range, accuracy (0.2%FS), power requirements (3.0V), connection type (G1/4"), and MAC address. It also includes CE marking and manufacturer details.

Delivery, Unpacking, and Intended Use

Delivery, Unpacking and Accessories

All units are checked for operational reliability before shipment. Upon receipt, inspect the outer packaging for any damage or signs of improper handling. Report any damages to the forwarder and sales representative immediately, providing details of the defect, type, and serial number. In-transit damage not reported immediately will not be recognised.

Unpacking

Carefully unpack the unit to prevent damage and check the delivery's completeness against the delivery note.

Scope of Delivery

• 1x DPG according to order data
• 1x Operating manual
• Packaging or transport protection

IMPORTANT! Use the type plate to verify the delivered unit matches your order. Do not touch the measuring diaphragm. For devices with electrical components, ensure correct batteries (2x AA) are installed.

Intended Use

The DPG digital gauge is intended solely for inspecting, adjusting, and calibrating pressure measuring equipment. Do not use it outside its specifications or disregard operating instructions.

Important Warnings

⚠️ WARNING! Not a safety component!

The DPG pressure gauge is not a safety component as defined by directive 2006/42/EC (Machine Directive). Never use it as a safety component.

⚠️ DANGER! Risk of injury or material damage in the case of excessive pressure!!

Exceeding maximum overload values can lead to material failure and serious harm. Ensure overload values are never exceeded.

The operational safety is guaranteed only when used within specified limits and for its intended purpose. Do not exceed permissible full-scale reading or temperature range. Verify suitability for your application before ordering and installation.

Connection and Battery Replacement

Connection

The DPG has a G1/4" (BSPP) male thread and is supplied with batteries. It is ready for operation after switching on.

⚠️ WARNING! Material damage and risk of injury!

Comply with nominal pressure specifications of the measurement point and adapter. The connection (AF 27) is approved up to 1,000 bar. Observe specified safety factors. Improper installation can lead to the gauge tearing off.

Follow these instructions when using the DPG:

• Only authorised personnel may operate the device.
• Ensure the deployment location is bright and accessible.
• Take precautions to protect the device from damage.
• Ensure adequate weather protection (refer to EN 60529 in Section 9.2).

Connection Steps:

1. Prepare the measurement setup for the G1/4" pressure connection point. Use only adapters with corresponding nominal pressure specifications. Do not install when the device is powered on.
2. Ensure the gasket is correctly seated in the pressure connection point.
3. Carefully turn the reference by hand into the measurement setup thread.
4. Tighten the pressure connection point with an open-end wrench (AF 27). Recommended assembly torque: 40Nm. Do not over-tighten.
5. Carefully rotate the gauge body by hand within 330° rotation limits to a suitable position. Rotate the dial only after installation.

IMPORTANT! Check for free turning. Ensure no attachments interfere with free turning during direct assembly.

Battery Replacement

CAUTION! Observe the battery type and polarity!

Incorrect battery type or insertion can cause damage. Use only new AA batteries of the same brand and ensure correct polarity.

Battery Replacement Steps:

1. Switch off the device.
2. Removal from the pressure connection point is recommended to minimise damage risk. Isolate the gauge from the pressure line and remove it (refer to Section 8.1-8.2 for disconnection).
3. Open the housing by loosening the large retainer screw on the rear cover. Set the rear cover aside.
4. Remove depleted batteries. No domestic waste! Batteries must be disposed of safely and in accordance with local regulations.
5. Insert new batteries, paying attention to polarity.
6. Carefully reattach the rear cover with the retaining screw.
7. If removed from the hydraulic line, reattach following Section 4.1 Connection guidelines.
8. After powering on, a zero reset may be required.

Gauge Operation and Settings

LCD Display

The LCD display shows:

• Bluetooth connectivity indicator (?)
• 3-segment Battery level indicator (?)
• Currently selected pressure display units
• Current pressure as a percentage of gauge range
• Live pressure reading
• Min/Max pressure reading

Basic Gauge Use

Gauge Settings

When in settings mode, buttons function as follows:

• [UNIT] Hold for 3 seconds: Increase the currently selected number.
• [UNIT]: Accept the entered value and move to the next setting.
• [ZERO]: Decrease the currently selected number. Move to next digit to the left.

To unlock settings pages, change 'Loc' (Lock) from 0000 to 1111.

Sample Interval Rate (SATE)

Range: 300...9999ms (default 1000ms). A lower interval samples pressure more often; a higher interval samples less often.

[UNIT] Save sample interval rate.

Error Correction Multiplier (E-00)

Range: 0.500...1.5000 (default 1.000). Multiplies measured pressure by this value (0.5x to 1.5x). Example: 1.25 multiplier with 10 bar reading shows 12.5 bar.

[UNIT] Save error correction multiplier.

Display Update Rate (FILT)

Range: 01...20 (default 01). Controls display update speed. Higher numbers show changes more slowly, appearing smoother but taking longer to reach live pressure.

[UNIT] Edit display update rate.

Status Codes and Troubleshooting

Status Codes

Errors and Troubleshooting

Watchlog Bluetooth App

The Watchlog Bluetooth app enables numerical and graphical viewing of data from up to four sensors simultaneously, with data logging and sharing capabilities. Download the app or view an overview at hydrotechnik.co.uk/wlb-dpg.

Connecting Your Devices

1. Open the app and press the 'Search' button ([Search]) to scan for powered-on devices.
2. Tap the white Bluetooth icon (?) for the desired device. The icon turns yellow during connection and blue upon successful connection.
3. During the first connection, you can name the device, set display units, and choose a colour for graphs. Up to 4 devices can be connected.
4. Press the gear cog icon (⚙️) to edit device name, units, or colour.
5. Press the 'Live' button ([Live]) to view numerical and graphical sensor data for all connected sensors.

Viewing and Recording Live Data

Each connected sensor is displayed in a tile showing its name, live pressure, and min/max values. Sensor data is shown graphically below the tiles, using the selected colour for each sensor. Tapping the graph displays values at specific points. The graph can be scrolled. Pressing 'Live' ([Live]) returns to the most recent data point. Pressing 'Record' ([Record]) starts data logging; tap again to stop. Data can be shared. The 'Devices' ([Devices]) button returns to the device management page.

Maintenance, Storage, and Disposal

Maintenance

The DPG is maintenance-free and cannot be repaired by the user. For defects, the device must be replaced or returned to the manufacturer. Batteries should be replaced approximately every 2 years or sooner (refer to Section 4.2).

Cleaning

Clean the DPG with a dry or slightly damp lint-free cloth. Avoid sharp objects or aggressive cleaning agents.

Storage, Transport

PROCEED CAUTIOUSLY! Electronic Component!

The device contains sensitive electronic components. Use original or comparable packaging for transport. Avoid shocks, strong vibration, and protect against humidity.

IMPORTANT! Remove the batteries!

If the device is not used for extended periods, remove batteries to prevent leaking damage.

Return Shipment to the Manufacturer

All units returned to Hydrotechnik UK for repair must be free of toxins and hazardous substances due to legal requirements for environmental protection and occupational safety. Customers must neutralise or purge units if necessary. Costs for inadequate cleaning or disposal will be billed to the operating company.

⚠️ WARNING! Risk of injury due to insufficient cleaning!

The operating company is responsible for damages from insufficient cleaning, including physical injuries or contamination. Comply with the following before returning the unit:

• Remove batteries before shipping; do not ship batteries with the DPG.
• Clean the device thoroughly, especially if the medium is hazardous (caustic, toxic, carcinogenic, radioactive).
• Remove all media residues, paying attention to sealing grooves and slits.
• Attach a note describing the malfunction, application field, and media properties.
• Contact your vendor for return procedures.

The customer must confirm that returned products are free from harmful substances.

Disconnection and Disposal

CAUTION! Risk of injury!

Never remove the device from a plant in operation. Ensure the plant is shut down professionally.

Before Disconnection

Prior to disassembly, ensure the equipment is switched off, in a safe and de-energised state, depressurised, and has cooled down.

Disassembly

Watch for leaking media and take precautions. Loosen the pressure connection shank with an open-end wrench (AF 27). Manually turn the DPG out of the measurement setup.

Disposal

Dispose of the device as electrical and electronic waste in accordance with 2011/65/EU (RoHS) and 2012/19/EU (WEEE) directives. Observe local regulations. ? NO HOUSEHOLD WASTE! Take the DPG to a local recycling plant or return it to your supplier or Hydrotechnik UK.

Technical Data

Dimensions

The gauge dimensions are approximately 143.5 mm (height) x 75 mm (width) x 40.5 mm (depth). The pressure connection is G1/4". Alternative threads (G1/4"B, G1/2", G1/2"B, 1/4"NPT, 1/2"NPT) are available on request. Units are in mm, with a tolerance of +/- 0.5mm.

Technical Specifications

CAUTION! Material damage!

Exceeding maximum overload values can lead to malfunctions and destruction of the digital gauge.

EC Declaration of Conformity

Hydrotechnik UK Test Engineering Ltd. declares that the Bluetooth enabled Pressure Gauges and Sensors (models DDPG, DPG, WLB-PT, WLB-TT) conform to relevant Union harmonisation legislation, including the Low Voltage Directive (2014/35/EU), Electromagnetic Compatibility Directive (2014/30/EU), and Radio Equipment Directive (2014/53/EU). Conformity is declared with reference to harmonised standards such as EN 61326-1:2013, EN 300328 V1.9.1, and EN 61326-2-3:2013. Additional information regarding the SPBTLE-RF Bluetooth module certification is provided, referencing various ETSI and EN standards.