mPower Electronics UNI MP100 Single Gas Detectors User Guide
- June 4, 2024
- mPower Electronics
Table of Contents
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mPower Electronics UNI MP100 Single Gas Detectors
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- 0001-000 [1.17.02.0002] (3.6 V, 2700 mAh, AA size).
- This instrument has not been tested in an explosive gas/air atmosphere having oxygen concentration greater than 21%.
- Substitution of components will impair suitability for intrinsic safety and 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 may be removed.)
Read Before Operating
The User’s Guide 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.
User Interface
The UNI’s user interface consists of the LCD display, LEDs, an alarm buzzer,
two keys: Left Key [Confirm/Number increasing] and Right Key
[Power/Cursor moving], an alligator clip, and a chemical sensor.
Display Detail 
- Gas name, including CO, H2S, SO2, or O2
- Question mark (perform operation?)
- OK status indicator (or accept number entry)
- Concentration unit, e.g. ppm, %, mg/m3, etc.
- Battery charge status
- Alarm type indicator
- Zero in progress indicator
- Calibration in progress indicator
- Concentration or other numerical value
Turning the Unit On
Press and hold the Right Key for 4 seconds, until the LCD displays “On”, the
buzzer beeps, and the green LED is on. The unit enters a warm up and self-test
sequence, shows the firmware version, e.g. “VER”,”1.0.0.0″ and the programmed
alarm limits, STEL, TWA, etc.
Note:
Some units may need several minutes to an hour to stabilize and should be
re-zeroed at that time.
Turning the Unit Off
In normal display mode, press and hold the Right Key for a 5-sec. count down
until the unit powers off.
Normal mode
In normal mode, the gas concentration displayed on the LCD continuously and
the unit alarms if a pre-set limit is exceeded. The user can check various
other values like STEL, TWA, PEAK, and (for O2) MIN by pressing the Right Key.
Alarm events are also shown.
Enter Configuration Mode
Press and hold the Left and Right keys together for 3 seconds, until “PWD” is
displayed, prompting password entry. To input the password, use the Left Key
to increase the number, and the Right Key to move the cursor. Default is 0000.
After all four digits are entered, the cursor will move to “OK”. Use the Left
Key to accept and enter Config Mode.
Configuration Mode Menu
In Config Mode the user can do calibrations and change various operating parameters:
- AiR, SPAN: Zero or Span calibration,
- BUMP: Bump test
- SET HIGH\LOW\STEL\TWA alarm limits
- SET Cal: Change span value
- CAL INTV, BUMP INTV span or bump interval
- SET UniT: Change concentration unit
- Vib SET: Vibrator enable/disable
- P-on Zero SET: Power on zero enable/disable
- FAST SET: Fast power on enable/disable
- RST cF9: Reset configuration to default values
- EXIT: Exit Config Mode
In Config Mode, in general, use the Left Key to increase a number or confirm,
and use the Right Key to move the cursor or move to the next programming item.
Exit Configuration Mode
Scroll to “EXIT?” and press the Left Key to exit Config Mode and return to
Normal Mode.
Daily Self-Test
Press the Left Key to confirm that the LEDs flash, the buzzer beeps and the
unit vibrates if programmed to do so.
Alarm Limits
Alarms are triggered when readings are above the Low or High Alarm limit.
To adjust an alarm limit, enter Config Mode and scroll to the desired alarm:
SET HIGH\LOW\STEL\TWA?.
- Press Left to display the alarm value with the first digit flashing
- Use Left to move to the desired flashing digit
- Use Right to increase the value and cycle 0-9.
- When finished, scroll Right to OK and press Left and exit.
Oxygen Monitors
Standard Oxygen Monitors alarm when readings are either below the Low Alarm or
above the High Alarm. Inert Oxygen Monitors give no alarm at 0-4% or >19.5%
O2, Low alarm at 4-5% O2, and High alarm at 5-19.5% O2. The 4% & 5% Low and
High limits can be adjusted, but the 19.5% value is fixed.
Zero (Fresh Air) Calibration
Zero calibration sets the base line for the sensor and is done in fresh air or
other clean air source. Enter Config Mode and “AiR?” displays as the first
menu item. Press the Left key to start the15-second zero calibration count-
down, after which a “pass” or “fail” result will be displayed. To abort, press
the Right key during the 15- second count, and “AbRT” displays to confirm.
Span Calibration
Span calibration uses a known concentration gas to determine the response of the sensor to the gas.
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Attach the Calibration Adapter over the inlet port on the front of unit by pressing it into place.
Use a fixed-flow regulator with a flowrate of
preferably 0.3 to 0.5 LPM. Higher flowrates can be used if needed, but not
lower. For reactive gases, e.g., HCl, HF, O3, ClO2, PH3, NH3, and ethylene
oxide, be sure to use Teflon tubing connections and see TA Note 6. For HCl and
HF be sure to use a stainless steel regulator. -
Enter Config Mode and scroll to “SPAN?”
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Start the gas flow and press the Left key to start the calibration countdown. The default count time is 60 seconds, but some sensors will go longer.
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When finished, a “pass” or “fail” result will be displayed. Turn off the gas supply, remove the calibration adapter, and exit to Normal Mode.
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To abort at any time during the count-down, press the Right Key and “AbRT” is displayed.
Maintenance and Service
If used in high-dust environments, replace the inlet filter regularly. Battery
and sensor can be replaced as needed. For other maintenance, contact mPower’s
service department or refer to the full User Manual.
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 electrical and electronic equipment and their
components at the 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.