Turning the Unit On
Press and hold the Right Key for 3 seconds, until
buzzer beeps, red LED on, unit is powered on. After
warm up and self-test sequence, unit enters normal
reading mode, showing real time gas concentration.
Turning the Unit Off
In normal reading mode, press and hold the Right
Key, unit will display 5 seconds count down, with red
LED flash and buzzer beeps once per second. After
the last long flash and beep, LCD displays “Power
Off”, unit is powered off.
Charging MP400
Always fully charge the battery before use. Plug charger
to the bottom of MP400. Unit LCD will show charge
status. While charging, the LCD displays a battery icon
cycle from empty to full. When the battery is fully
charged, the LCD displays a full battery.
4
Normal Mode
After warm up finished, unit enters normal reading
mode, start monitoring gas concentration and the
reading value will be displayed on the LCD screen.
User can check some other values like STEL, TWA,
PEAK and MIN by pressing Right Key, these screens
will cycle one by one.
5
Config Mode
In config mode, user can do sensor calibration and
bump test, change sensor alarm limits and set unit
parameters.
Enter Config Mode
Press and hold the Left and Right Key together for 3
seconds, the unit will enter config mode.
⚫
The config mode is password protected.
⚫
The default password is “0000”.
⚫
After all four digits are inputted
，
press Left Key to enter config
mode.
Config Mode Menu
⚫
Sensor: Calibration, Bump, Set Span Value.
⚫
Alarm: Set High, Low, STEL, TWA alarm.
⚫
Datalog: Set datalog interval, clear datalog.
⚫
Unit Setting: LCD contrast.
⚫
Wireless: Wireless operation.
⚫
Exit: Exit from config mode.
Exit Config Mode
Press Right Key to move high-light to “Exit” icon,
then press Left Key to exit from config mode.
6
Change Alarm Limit
All alarm limits can be customized, including high,
low, STEL and TWA alarm.
⚫
To enter alarm limit setting:
Config mode
→
Alarm Menu
→
Alarm Type.
⚫
To change value:
Press Right Key to move high-light field, press
Left Key to change value, hold Left Key down
will change value continuously.
⚫
To change number direction:
Press Left and Right together to toggle between
increase(
) and decrease(
).
⚫
To finished setting:
Press Right Key until bottom-left corner show
“Done”, press Left Key to exit setting. If value
has been changed, there will be a message to
confirm saving the new values. Press “Yes” to
save, “No” to discard.
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