Mixed-Gas Calibration - Dräger X-am 7000 Technisches Handbuch

The Menu » Calibration «
- The corresponding error message is displayed.
To return to the menu:
Press the » « key

OK
To terminate fresh-air calibration:
Select » Menu « and press the »

6.3

Mixed-gas calibration

- This function is used when the sensitivity of several sensors is
to be calibrated in a single step.
- All activated sensors must be warmed up (no warning icon »
on the display.
NOTICE
i i
Observe the information about cross-sensitivity of certain
gases shown in the Data Sheet for the sensor(s) to be
calibrated.
Select » Calibration « and press the »

Select » Mixedgas cal. « and press the »

- The values for the mixed gas are displayed, for example:
Supply mixed gas
CO : 2.5 vol. %
2
CO : 250 ppm
- The calibration gas, the concentration and the units are the same as
for the calibration of the sensitivity as described on page page 58.
- If desired, the calibration gas concentration can be changed as
follows:
Use the » « key to select the appropriate line and press

M
the » « key.
OK
56
« key.
OK
«
« key.
OK
« key.
OK
Set the calibration-gas concentration with the »

keys and confirm the setting with the »
Apply the mixed gas (see the information in the section

"Maintenance" page 78) to the sensor.
Select » Calibration « and press the »

When the displayed measured values have settled:
Select » Confirm « and press the »

- The message » Remove Gas ! « is displayed
Turn off the flow of mixed gas through the sensor.

An error is indicated in the case of any fault, such as a sensor or
instrument fault, if the sensor is not yet warmed up or if the data and
time have not been set. If this happens:
Use the » « key to select the appropriate line and press

M
the » « key.
OK
- The corresponding error message is displayed.
To return to the menu:
Press the » « key

OK
To terminate mixed-gas calibration:
Select » Menu « and press the »

« and » «
M
« key.
OK
« key.
OK
« key.
OK
« key.
OK
Dräger X-am 7000