UNI Lite MP110 Single Gas Detectors User Guide

This manual must be carefully read by all individuals who have or will have the responsibility of using, maintaining or servicing this product. The product will perform as designed only if it is used, maintained and serviced in accordance with the manufacturer’s instructions.

WARNING!

Never operate the monitor when the cover is removed.

Remove the monitor cover and battery only in area known as non-hazardous.
Use only mPower’s lithium battery part number M500-0038-000 (3.6 V, 1650 mAh, 2/3 AA size). or part No. ER14335 cell manufactured by EVE Energy Co., LTD

This instrument has not been tested in an explosive gas/air atmosphere having an oxygen concentration greater than 21%.
Substitution of components will impair suitability for intrinsic safety.

Substitution of components will void warranty.
It is recommended to bump test with a known concentration gas to confirm the instrument is functioning properly before use.

Before use, ensure that the colorless ESD layer on the display is not damaged or peeling. (The blue protective film used for shipment may be removed.)

Proper Product Disposal at The End Of Life

The Waste Electrical and Electronic Equipment (WEEE) directive (2002/96/EC) is intended to promote recycling of electronic equipment and their components at end of life . This symbol (crossed-out wheeled bin) indicates separate collection of waste electrical and electronic equipment in the EU countries. This product may contain one or more Nickel-metal hydride (NiMH), Lithium-ion, or Alkaline batteries. Specific battery information is given in this user guide. Batteries must be recycled or disposed of properly. At the end of its life, this product must undergo separate collection and recycling from general or household waste. Please use the return and collection system available in your country for the disposal of this product.

General Information

The UNI Lite (MP110) is a low-cost, single-sensor, portable, personal monitor for CO or H2S gas. It displays gas concentration continuously on a big segment LCD. It also monitors the STEL, TWA, and Peak values, and these can be displayed on demand. High, Low, STEL and TWA alarm thresholds are configurable. The shell is made of high strength, durable material. The onekey operation is simple to use. Sensor and battery can be replaced easily. Calibration is also very convenient.

User Interface

Display

Gas name, CO or H2S
Question mark (to confirm action)

Unit status indicator “OK” and to confirm entry
Gas unit, includes: x10-6, ppm, mg/m3, µmol/mol

Battery charge status
HIGH, LOW, STEL, TWA alarm indicator (when flashing)

Span calibration (in process or due)
Zero calibration (in process or due)

Concentration reading or other parameter

Operation

Turning the Unit On and Off

To turn on, press and hold the Key for 3 seconds, until the red light, buzzer, and vibrator all trigger, and the LCD displays “On”. To turn off, press and hold the Key from normal display mode for a 3-second count-down, until the unit displays “Off”.

After powering on, the unit shows the firmware version and enters Normal User Mode.

If the sensor cannot be identified, the screen alternately displays and .
If the Bump or Cal Due setting is enabled (requires a CaliCase docking station) and the due date has passed, the display will alternate between or and .

The Key must be pressed to acknowledge, otherwise the instrument will turn itself off automatically after 30s. Enter Configuration Mode or use a CaliCase (see below) to perform bump or calibration. If the battery has been removed or replaced, be sure to use mPower Suite to reset the instrument clock before bump or calibration.

Normal User Mode

Real Time Readings
In Normal Mode the MP110 displays instantaneous gas concentrations and the unit alarms if a pre-set limit is exceeded. Long-press the key to test the alarms or short press the Key to cycle through values of STEL, TWA, and Peak, and view the Event Log.
The display returns to real time readings from any screen if there is no key action for 60 seconds.

Alarm Test
From Normal User Mode, the user can check the function of the buzzer, LED and vibration alarms by pressing and holding the Key until the unit beeps.

STEL
This displays the Short Term Exposure Limit (STEL) calculation, which is the average concentration in a moving window over the previous 15 minutes. The STEL value rises and falls with some lag time over the instantaneous reading. A STEL alarm cannot be cleared except by turning the unit off and back on, but will clear automatically after 15 minutes in clean air.

TWA
This displays the Time-Weighted Average (TWA) calculation, which is the average concentration times the fraction of 8 hours that the instrument has been on. The TWA value is similar to a dose in that it rises but never falls, until it is reset by turning the unit off. Likewise, a TWA alarm cannot be cleared except by turning the unit off and back on.

NOTE: If the unit is left running for several days, it may go into TWA alarm even though the instantaneous concentration never exceeds the TWA alarm level, because the TWA value keeps accumulating even after a regular 8-hour working day.

Peak
The Peak screen shows the highest value since the unit was turned on.

Long-press the Key to enter the Clear Peak screen and long-press again to acknowledge and clear the Peak value.

Alarm Log

Up to 50 alarm events lasting ≥5 seconds are logged into memory and the last 10 such events can be viewed on the instrument. From the EVT LOG screen, long-press to display A 1 alternately with the alarm concentration and type. Values preceded by a “–” with no alarm label indicate a negative concentration alarm event. Short-press to cycle through the 10 available alarms. To view all 50 alarm events along with date and time stamps, it is necessary to use a CaliCase connected to a computer with mPower Suite software (check availability).

Configuration Mode

In Configuration Mode, the user can access the following menus:

AIR (Zero) Calibration
SPAN Calibration
SET High Alarm
SET Low Alarm
SET STEL Alarm
SET TWAAlarm
SET Span Gas Concentration
Set Unit of Gas Concentration

Default Alarm and Span Settings (ppm)

Sensor	Low	High	STEL	TWA	Span
CO	35	200	100	35	100
H2S	10	20	15	10	25

In general, long-press the Key to enter the menu item and short-press to scroll to the next menu item or confirm an operation. To enter numbers or password, short-press to increase a number and long-press until the beep to move the cursor to the next digit. After all digits are entered, long-press to move to “OK?” and short-press to accept and save the value.

Entering and Exiting Configuration Mode
With the unit off, double-click the Key. While the unit shows “PROG”, short-press the Key to prompt password entry with the first digit flashing. Short-press the Key to increase the number, and long-press until the beep to move the cursor to the next digit. The default password is 0000. After all four digits are entered, long-press to move to “OK” and short-press to accept and enter Configuration Mode..

NOTE: The MP110 default password is 0000.

To exit Configuration Mode, short-press repeatedly until

is displayed, and long-press to return to Normal Mode. Alternatively, just wait for one minute and the unit will automatically revert to Normal Mode. To re-enter Configuration Mode it is necessary to turn the unit off, double-click, and re-enter the password.

Sensor Calibration and Bump Test
Before the unit can monitor gas correctly, it needs to be calibrated using zero and span gas. Calibration and Bump Tests are recorded in the instrument datalog for compliance purposes. It is recommended that the unit be calibrated every 3 to 6 months or according to the user’s company policy. See TA Note 3 on the mPower website (www.mpowerinc.com) for more details on calibration frequency.

Zero (Fresh Air) Calibration
Zero calibration sets the baseline for the sensor. It is preferably done in fresh air at the same ambient temperature and humidity as will be used for measurements. However, nitrogen, dry cylinder air, or other gas source known to be free of detectable compounds can also be used.
From the

menu, long-press to start a zero calibration. The unit displays a 15-second count-down followed by the calibration result as either

. The user can abort the zero calibration during the count-down by long-pressing, after which is displayed.

Span Calibration
Span calibration determines the sensitivity of the sensor to the gas. Default calibration concentrations are 25 ppm for H2S and 100 ppm for CO. We recommend using a fixed flow regulator of preferably 0.3 LPM, but no more than 0.5 LPM. Use as short tubing connections as possible

Span Calibration Procedure

Connect the Calibration Adapter to the span gas cylinder’s regulator and snap it into place over the UNI Lite sensor.
Check that the SET Cal value (see below) is the same concentration as on the gas cylinder and adjust if they do not match.
Enter the menu, start the gas flow, and long-press to start the calibration count-down.
The calibration time is typically 70 seconds but may be shorter or longer depending on the sensor type.
To abort the span calibration during count-down, long-press and is displayed.

After count-down, the span calibration result or is displayed.
Turn off the gas supply and remove the Calibration Adapter.

CAUTION

During normal monitoring, never operate the MP110 with the Calibration Adaptor attached because it will block diffusion of gas into the sensor.

Bump Test

A Bump Test is a quick check that the sensor and alarms are functioning, without performing a full calibration. Bump testing requires a CaliCase Docking Station.

This feature is currently under development. Check for updates of this manual on the mPower website when the UNI Lite CaliCase becomes available.

Setting Instrument Configurations

Alarm Limits
MP110 toxic gas monitors alarm with 2 beeps & flashes per second when concentrations are over the Low Alarm setpoint, and 3 beeps & flashes per second when over the High Alarm setpoint. All the preset alarm limits, HIGH, LOW, STEL & TWA can be changed. From these menus and , long-press the Key to enter the corresponding alarm limit menu, and adjust it using the same process as for entering a password (Section 4.4.1):
The current setting value is displayed, with the first digit flashing:

Short-press to increase the current digit, cycling from 0 to 9:

Long-press to move the cursor to the next digit:

After all digits are entered, long-press to move to the “OK” symbol, and short-press to save the entry. The unit will display SAVE for a few seconds while storing the value; it is not necessary to press OK to initiate saving.

NOTE 1: The MP110 will show an error message “FAIL” if:

The Low alarm is attempted to be set higher than the high alarm setting.

The High alarm is attempted to be set lower than the low alarm setting.
The entered value is outside the measuring range.

Span Value
The span gas concentration can be changed from the SET Cal menu using the same process as for setting alarm limits.

NOTE: The MP110 will show an error message “FAIL” if the Span setting is less than 5% of the measuring range or greater than the measuring range.

Bump/Cal Intervals
The Bump and Cal Interval shows the number of days between required bump or calibration.
This feature is currently under development. Check for updates of this manual on the mPower website when the UNI Lite CaliCase becomes available.

Gas Concentration Unit
The gas concentration unit menu displays with the question mark

flashing Longpress the Key to enter the gas unit sub-menu, showing the currently selected unit blinking. Unit options include x10-6 , ppm, mg/m3 and µmol/mol for toxic gas sensors. Short-press to scroll through the unit list and select, and long-press to save and exit.

Computer Interface

Computer interface requires a UNI Lite CaliCase Docking Station connected to a PC fitted with mPower Suite software. mPower Suite can be used to 1) download logged alarm and calibration events, 2) print calibration certificates, 3) upload configuration parameters to the instrument and 4) upgrade the instrument firmware. mPower Suite and instrument firmware can be downloaded from the website at https://www.mpowerinc.com/software-downloads/ .

These features are currently under development. Check for updates of this manual on the mPower website when the UNI Lite CaliCase becomes available.

CaliCase Docking Station (MP311) Calibrations

Bay CaliCase Set-up

Before a docking station can be used for calibrations, it must be set up for the desired gas type and span concentration.

Connect the USB cable to both the docking station and the PC.
WARNING! Connect only in non-hazardous environments!

These features are currently under development. Check for updates of this manual on the mPower website when the UNI Lite CaliCase becomes available.

Maintenance and Specifications

CAUTION!
Maintenance should be performed only by a qualified person who has proper training and fully understands the contents of the manual.

Battery Replacement

The battery typically lasts 2 years but may be drained faster if the unit has frequently gone into alarm. When the charge is low, the unit displays a red battery icon and a battery low alarm is triggered once per minute. When the battery is dead, is displayed and the battery dead alarm triggers every second. The battery needs to be replaced, as follows:

Turn off the MP110 and place it face down on a soft surface.

Use a Phillips head screwdriver to loosen each of the four screws.
Remove the top cover after carefully unplugging the buzzer connector.
Slide the battery out of its compartment.

Place the new battery into the compartment with its “+” end oriented toward the “+” on the printed circuit board.
Plug in the buzzer connector and reinstall the top cover.
Re-install the screws through the back cover. Be careful to not over tighten the screws.

WARNING!

Never operate the monitor when the cover is removed.
Remove the monitor cover and battery only in area known as non-hazardous.
Use only mPower’s lithium battery part number M500-0038-000 (3.6 V, 1650 mAh, 2/3 AA size). or part No. ER14335 cell manufactured by EVE Energy Co., LTD.

Sensor Filter Replacement

The sensor gas inlet should be cleaned regularly (purged with compressed air) to avoid dust and other impurities blocking the air access and reducing the sensitivity of the detector. If this does not help, replace the internal filter whenever it appears dirty, is clogged with particles, has contacted liquid, or when sensor response becomes weak and/or slow.

Turn off the MP100 and remove the top cover as described above for battery replacement.
Peel off the old filter, and gently press a new filter onto the sensor.

Reconnect the buzzer and reinstall the top cover as described above for battery replacement. Be careful to not overtighten the screws.

Sensor Replacement

MP110 models are designed for easy sensor replacement. CO and H2S sensors have typical operating lives of a few years.

Turn off the MP110 and remove the top cover as described above for battery replacement.

Replace the old sensor with a new one. Make sure the pins are not bent or corroded. Align the pins to the corresponding holes and push the sensor straight in. The sensor should fit flush against the printed circuit board.
Check the instrument filter and, if needed, replace as described in the previous section.
Reconnect the buzzer and reinstall the top cover as described above for battery replacement. Be careful to not overtighten the screws.

CAUTION!

Sensors are not interchangeable. Use only mPower sensors and use only the sensor type specified for your MP100 monitor. Use of non-mPower components will void the warranty and can compromise the safe performance of this product.

Troubleshooting

Problem	Possible Reason	Solution
Cannot turn on unit	Battery not installed	Install battery.
Cannot turn on unit	Depleted or defective battery.	Replace battery.
Unit shows “Cal Due” or “Bump Due” and shuts off after 30 seconds	Calibration or bump due date passed	Press Left key to prevent shut off. Access program menu and perform bump or calibration. Or use mPower Suite to update to later Cal or Bump Due date. If battery has been replaced, re-set clock in Suite before calibration.
Reading abnormally low (or Fails Calibration)	Incorrect calibration or zeroed when detectable gas is present.	Zero and Span calibrate. Ensure clean air when zeroing.
	Calibration gas flow > 0.6 LPM	Use flow between 0.3 and 0.6 LPM
	On-board filter plugged.	Replace filter. Use external filter clip in dusty environments.
	Weak sensor.	Have Service Technician check raw counts and replace sensor as needed.
	Calibration Adapter is attached.	Remove Calibration Adapter.
Reading abnormally high(or Fails Calibration)	Incorrect calibration or degraded span gas used or tubing absorbs spangas	Zero and Span calibrate instrument. Ensure span gas is not expired.Used short, inert (PTFE) tubing
	Calibration gas flow < 0.3 LPM	Use flow between 0.3 and 0.6 LPM
	Environment contains cross- sensitive substances	Check TA Note 4 for possible cross-sensitivities.
Reading abnormally noisy(or Fails Calibration)	Incorrect calibration or degradedspan gas used or tubing absorbs span gas	Zero and Span calibrate instrument. Ensure span gas is not expired.Used short, inert (PTFE) tubing
Reading abnormally noisy(or Fails Calibration)	Weak sensor.	Have Service Technician check raw counts and replace sensor as needed.
Buzzer, LED, or vibration alarm inoperative	Bad buzzer, LEDs, or vibration alarm.	Call authorized service center.
Buzzer, LED, or vibration alarm inoperative	Blocked alarm port	Unblock alarm port.
TWA alarm despite low readings for last 8 hours	Unit has been left on for >8 hours, (TWA value continues to accumulate)	Turn unit off and back on to re-set TWA.

Alarm Signal Summary

Display	Reason
	Over Range alarm： Buzzer 3 beeps per second LED 3 flashes per second 1 Vibration per second“OVER” and “500” (“sensor range”) 1 flash per second
	High alarm：Buzzer 3 beeps per second LED 3 flashes per second 1 Vibration per second“HIGH” 2 flashes per second
	Low alarm：Buzzer 2 beeps per second LED 2 flashes per second 1 Vibration per second“LOW” 2 flashes per second
	STEL alarm：Buzzer 1 beeps per second LED 1 flash per second1 Vibration per second“STEL” 2 flashes per second
	TWA alarm：Buzzer 1 beep per second LED 1 flash per second1 Vibration per second“TWA” 2 flashes per second

	Bump Overdue alarm: Buzzer 1 beep per minute LED 1 flash per minute1 Vibration per minute
	Cal Overdue alarm: Buzzer 1 beep per minute LED 1 flash per minute1 Vibration per minute
	Battery Low alarm： Buzzer 1 beep per second LED 1 flash per second“bAT LoW”1 flash per second
	Battery Empty alarm： Buzzer 1 beep per minute LED 1 flash per minute1 Vibration per minute1 flash per minute
	Sensor Error alarm： Buzzer 1 beep per second LED 1 flash per second “SEN Err”1 flash per second

Instrument Specifications

Detector Specifications

Size	3.4 x 2.2 x 1.1 in (87 x 55 x 28 mm)
Weight	3.4 oz. (95 g)
Sensors	4-size electrochemical sensors: CO and H2S
Response	15s 190
Temperature	-4° to +122°F (-20° to +50°C)
Humidity	5% to 95% Relative Humidity (non-condensing)
Pressure	86 to 106 kPa (0.85 to 1.05 atm)
Alarm Type	High, Low, STEL & TWA alarms adjustable Over range alarm Low battery alarm
Alarm Signal	95 dB @ 30 cm Bright red LEDs Built in vibrator
Calibration	2-point calibration: zero and span
Event Log	Up to 50 alarm events(Requires separate docking station to download – check availability)
IP Rating	IP-67
EMI/RFI	Compliant with EMC Directive 2014/30/EU
Safety Certifications	IECEx Ex ia IIC T4 GaCNEX Ex ia IIC T4
Battery	2/3 AA Lithium battery replaceable
Docking Station for Cal & Bump	Check Availability
Warranty	2 Years

Sensor Options

Sensor	Range	Resolution
CO (Carbon Monoxide)	0-1000 ppm	1 ppm
H2S (Hydrogen Sulfide)	0-100 ppm	0.1 ppm

Technical Support and mPower Contacts

mPower Electronics Inc.
2910 Scott Blvd. Santa Clara, CA 95054
Phone: 408-320-1266
Fax: 669-342-7077
info@mpowerinc.com
www.mpowerinc.com

Documents / Resources

UNI Lite MP110 Single Gas Detectors [pdf] User Guide
MP110 Single Gas Detectors, MP110, Single Gas Detectors, Gas Detectors, Detectors

References

User Manual

Read Before Operating