Carrying Out A Single-Gas Calibration - Dräger X-am 8000 Instrucciones De Uso

en Maintenance
Requirements:
– Fresh air calibration can only be carried out if at
least once sensor supports the fresh air calibration.
– The fresh air must be free of measurement or
interfering gasses.
– The gas detector is switched on and warm-up
phases 1 and 2 are complete.
To carry out a fresh air calibration:
1. Switch on the gas detector.
2. Open the fresh air calibration (depending on the
configuration):
If the fresh air calibration was released for user level
0 by the Dräger CC-Vision PC software:
● Select > Maintenance > Fresh air cal..
If the fresh air calibration was not released for user
level 0 by the Dräger CC-Vision PC software:
a. > Log in
b. Enter and confirm the password.
c. Select Maintenance > Fresh air cal..
3. Select to start the fresh air calibration.
 All measuring channels which are included in the
fresh air calibration flash, and all others are
greyed out.
The result is displayed as follows for every
measuring channel:
fresh air calibration successful.
fresh air calibration failed.
4. If necessary, press
control. In this case, a calibration happens
immediately.
Dräger recommends using the automatic stability
control (wait until the gas detector has automatically
carried out the calibration).
 The new measured value is displayed for
confirmation.
The result is displayed as follows:
fresh air calibration successful.
fresh air calibration failed.
5. The fresh air calibration is complete when all
measuring channels included in the calibration
successfully passed or failed the calibration.
● Select and then confirm the dialog to discard
the result.
● Select to confirm the result.
to overrule the stability
If there was an error during the fresh air calibration:
– Repeat the fresh air calibration.
– If necessary, replace the sensor.

5.5.2 Carrying out a single-gas calibration

Observe the following notices for the single-gas
calibration:
● For a single-gas calibration, you can choose either
the zero-point calibration and span calibration.
● With a zero-point calibration, the zero-point of the
selected sensor is set to zero.
● For the zero-point calibration of Dräger IR sensors, it
is assumed that the change in the zero-point leads
to a change of less than or equal to ±5 %LEL or
0.05 Vol% CO of the measured value at 50 %LEL
2
or 0.5 Vol% CO . If the deviation is greater than
2
±5 %LEL or 0.05 Vol% CO
invalid and an error or a warning is displayed
(configurable).
● For a span calibration of Dräger IR sensors, it is
assumed that a valid zero-point calibration exists (no
more than 30 min. old), otherwise an
acknowledgeable warning is displayed.
● For a span calibration, the sensitivity of the selected
sensor is set to the concentration value of the test
gas.
When implementing an active over range with the
CatEx sensor (measurement gas: methane) note the
additional information in the technical manual.
Use a standard test gas.
Allowed test gas concentration:
2 1)
DUAL IR CO
1)
IR CO
2
1)
DUAL IR Ex
1)
IR Ex
CatEx
O
2
CO
H S
2
1)
H HC
2
1)
PID HC
1)
PID LC ppb
Test gas concentration of other gasses:
Refer to the Dräger CC-Vision PC software
1) X-am 8000 only
, the span calibration is
2
2)
0.05 to 5 Vol%
The permissible test gas
concentrations were dis-
played by the gas detector
for the single-gas calibra-
tion of the sensitivity.
100 ppm iBut
5 ppm iBut
®
X-am 8000