ENMET EX-2000 - Manual (Page 13)

EX2000 ENMET Corporation
9
4.2 Calibrating the EX-2000
The only way to check if the EX-2000 detection function is working properly is the calibration performed with a standard gas.
Calibration must be performed:
Every 6 months minimum.
After an exposure to high gas concentrations.
After more than one month storage with no use.
After a sensor change.
Following an instrument fault.
The recommended standard gas is stated on the target gas label, located on the side of the EX-2000 . Other standard gases may
be used. See Table 1, Coefficients of gases detected.
To enter the Calibration Menu:
1. Enter the calibration menu by inserting the programming plug into the programming port and pressing the
ALARM & BACKLIGHT switches simultaneously. The pictogram of the maintenance wrench will appear and PrOG will
appear on the display, to indicate the EX-2000 is in maintenance mode and ready for programming or calibration. Press
the BACKLIGHT switch to toggle between programming and calibration.
2. While CAL is displayed press the ENTER switch to enter the calibration menu.
While Set0 is displayed press the ENTER switch to adjust the zero value.
3. Modify the zero value if necessary:
Press the BACKLIGHT switch to decrease the zero value. ▼
Press the ALARM switch to increase the zero value. ▲
4. Press the ENTER switch to enter the new zero value.
SEnS will appear on the display, for the adjustment of sensitivity to standard gas.
5. Press the ENTER switch to enter the sensitivity adjustment procedure.
6. Attach the calibration cover to the calibration adapter and position the calibration cover over the sensor.
7. Attach the standard gas to the calibration adapter and open valve on cylinder of gas to allow the gas to flow
The measurement of applied standard gas will appear on the display, for the adjustment of sensitivity to standard gas.
Allow signal to stabilize, approximately 2 minutes.
8. Modify the sensitivity value if necessary:
Press the BACKLIGHT switch to decrease the sensitivity value. ▼
Press the ALARM switch to increase the sensitivity value. ▲
9. Press the ENTER switch to request confirmation of the new sensitivity value.
COnF will appear on the display for the confirmation of the new sensitivity value.
10. Press the ENTER switch to confirm of the new sensitivity value.
COnFNO will appear on the display, to request rejection or confirmation of sensitivity value.
Press the BACKLIGHT switch to toggle between Confirmation Yes or No.(COnFYES or COnFNO)
11. Press the ENTER switch to confirm or reject the new sensitivity value.
The instrument will return to the Operational Mode.
Remove calibration adapter and cover.
Remove the programming plug.