ENMET MX-2100 - Manual (Page 17)

MX2100 ENMET Corporation
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4.3.2 Calibration for (Standard) Combustible Gases
The process to calibrate any channel regardless of the type of sensor is the same.
The combustible sensor requires additional steps.
With the MX-2100 turned on:
Press the Backlight switch 8 times, this will place the instrument at the Maintenance Access Code window.
The factory default access code is 1270.
Press the AUDIO switch to increment the digit then press the Backlight switch to move the cursor to the next position.
Continue this process until the access code is displayed and then press the ENTER switch.
If the code is correct the Menu window will display.
Use the AUDIO switch to highlight the Calibration menu and press the ENTER switch.
The display will indicate the sensors installed in the MX-2100.
Press the AUDIO switch to highlight the combustible sensor (factory default is Methane LEL)
Press the ENTER switch. The display will list the available types of gases. (factory default is Methane LEL)
Press the AUDIO switch to choose the type of gas for calibration and press the ENTER switch.
The display will indicate the last concentration of calibration gas used.
If this matches the calibration gas available to be used press enter.
If this does not match the calibration gas available to be used, press the AUDIO switch to change the digit and the
Backlight switch to move the cursor until the display matches the calibration gas available.
N OTE : If the level of calibration gas is outside the preset parameters for calibration gas the MX-2100 will not accept the value.
When the level of the calibration gas that is available matches the display press the ENTER switch.
The display will indicate the Zero reading and PLEASE WAIT.
When the PLEASE WAIT disperses the numerical number must be 0 before proceeding.
Press the ENTER switch
GAS is highlighted with PLEASE WAIT, when the PLEASE WAIT disperses,
Attach the calibration cover to the MX-2100
Attach the regulator to the cylinder of calibration gas and plug the hose into the calibration cover
Open valve, and wait for the numerical readout to stabilize, then press the ENTER switch.
If the Zero reading and Gas reading are within preset parameters the display will change to CONFIRM, YES/NO. Use the
AUDIO switch to highlight the YES and press the ENTER switch.
The display will return to the Maintenance Menu window.
If the display indicates CELL USED or ZERO DRIFT/CELL USED press the Enter switch. The display will change to
CONFIRM, YES/NO. Highlight the NO and press the ENTER switch. The display will return to the Maintenance
Menu window.
CELL USED: Indicates improper calibration gas was used. Verify that the NO is highlighted and press the ENTER
Switch. Verify that the calibration gas applied matches the calibration gas requested.
If they match attempt a calibration again. If the calibration fails again then the sensor must be replaced.
ZERO DRIFT/CELL USED: Indicates the Zero(clear air) reading was to high prior to applying calibration gas.
N OTE : Following calibration with the MX-2100 display in Normal Operational Mode if the readout indicates a – number the Zero
reading during calibration was not a zero.
To continue with another calibration highlight the Calibration Menu and fallow the same steps as above.
To exit the Maintenance Menu highlight the Exit Menu and press the ENTER switch.
The display will return to the Normal Operational Mode.
If the combustible sensor is set to display a gas other then methane it is recommended to use that gas for calibration if a suitable
concentration is available.
W ARNING : If methane is a combustion hazard in addition to the other combustible gases then methane must be used as the
calibration gas. The instrument will automatically compensate gas sensitivity coefficients.