UNI MP100 Series Gas Detector Quick Start Guide

⚠ Warning

• Never operate the monitor when the cover is removed.
• Remove the monitor cover and battery only in areas 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 an 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.

Visual Description of Device Components

• LED alarm window: A small window for alarm indication.
• LCD Display: A large screen showing gas concentration and other information.
• Confirm/Number increasing key: A button on the left side.
• Buzzer: An audible alarm component.
• Alligator clip: Located on the back for attachment.
• Battery status: An indicator on the display.
• Power/Cursor moving key: A button on the right side.
• Sensor with ID on label: The gas sensor, typically with an identification label.

Display Detail

The LCD display shows various indicators and numerical values:

1. Gas name, including CO, H₂S, SO₂, or O₂.
2. Question mark (❓) indicating a pending operation.
3. OK status indicator (✔) or accept number entry.
4. Concentration unit, e.g., ppm, %, mg/m³, etc.
5. Battery charge status.
6. Alarm type indicator.
7. Zero in progress indicator.
8. Calibration in progress indicator.
9. Concentration or other numerical value.

The display features large seven-segment digits for numerical values, along with smaller indicators for gas type, units, battery status, and alarm conditions. Specific segments indicate “Zero Cal”, “High STEL”, “Low TWA”, and “ppm/%LEL/mg/m³/µmol” units.

Operation

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, showing the firmware version (e.g., “VER”, “1.0.0.0”) and programmed alarm limits (STEL, TWA, etc.). Some units may require 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-second countdown until the unit powers off.

Normal Mode

In normal mode, the gas concentration is continuously displayed on the LCD. The unit alarms if a preset limit is exceeded. Users 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. The default is 0000. After all four digits are entered, the cursor moves to “OK”. Use the Left Key to accept and enter Config Mode.

Configuration Mode Menu

In Config Mode, users can perform calibrations and change various operating parameters. In general, use the Left Key to increase a number or confirm, and the Right Key to move the cursor or to the next programming item.

• AiR, SPAN: Zero or Span calibration
• BUMP: Bump test
• SET HIGH\LOW\STEL\TWA: Alarm limits adjustment
• SET Cal: Change span value
• CAL INTV, BUMP INTV: Span or bump interval adjustment
• 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

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 to save and exit.

Oxygen Monitors

Standard Oxygen Monitors alarm when readings are either below the Low Alarm or above the High Alarm. Inert Oxygen Monitors do not alarm at 0-4% or >19.5% O₂. Low alarm is at 4-5% O₂, and High alarm is at 5-19.5% O₂. The 4% & 5% Low and High limits can be adjusted, but the 19.5% value is fixed.

Calibration

Zero (Fresh Air) Calibration

Zero calibration sets the baseline for the sensor and is performed in fresh air or another clean air source. Enter Config Mode and “AiR?” displays as the first menu item. Press the Left key to start the 15-second zero calibration countdown, 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.

1. Attach the Calibration Adapter over the inlet port on the front of the unit by pressing it into place. (Description of adapter: A small, cylindrical adapter with an inlet port, designed to fit snugly over the sensor area.)
2. 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), use Teflon tubing connections. For HCl and HF, use a stainless steel regulator.
3. Enter Config Mode and scroll to “SPAN?”.
4. Start the gas flow and press the Left key to start the calibration countdown. The default count time is 60 seconds, but some sensors may take longer.
5. When finished, a “pass” or “fail” result will be displayed. Turn off the gas supply, remove the calibration adapter, and exit to Normal Mode.
6. To abort at any time during the countdown, 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.

Component Replacement Steps

1. Remove four screws: Unscrew the four retaining screws on the device casing.
2. Remove unit cover: Carefully lift off the device's outer cover.
3. Turn around detector: Rotate the internal detector assembly to access components.
4. Replace sensor: Disconnect and replace the gas sensor module.
5. Replace rubber holder with filter: Replace the rubber holder which contains the inlet filter.
6. Replace battery: Disconnect and replace the battery pack.

Proper Product Disposal at The End Of Life

The Waste Electrical and Electronic Equipment (WEEE) directive (2002/96/EC) promotes recycling of electrical and electronic equipment and their components at the end of life. A crossed-out wheeled bin symbol indicates separate collection of waste electrical and electronic equipment in EU countries. This product may contain one or more nickel-metal hydride (NiMH), lithium-ion, or alkaline batteries. Specific battery information is provided 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. Users should utilize the return and collection system available in their country for product disposal.