E Instruments E4500, Operating & Maintenance Manual

Page: 55 / 144

55
K000000000EJ 023826A0 100714
CHOOSE THE SENSOR TO BE RECALIBRATED AND PROCEED AS DESCRIBED (CO SENSOR
EXAMPLE):
•
Connect the known concentration gas cylinder to the instrument as shown in the following scheme:
WARNING!
Adequate ventilation must be provided when working with toxic gases, particularly the flow
meter and instrument outputs must be evacuated by a ventilation system.
GAS CYLINDER COMBUSTION ANALYZER FLOW METER
0.5 l/m
4. The following describes a recalibration example for CO sensor .
3. Once in the ‘On site calibration’ menu, the list of the installed sensors are shown for which the
recalibration is available. In the recalibration screen all information related to the last performed
calibration is shown, as well as the relevant values.
Calibrate : saves new calibration
Status : not active: returns to the factory
calibration
active: returns to the last calibration
made by the user
----: no ‘on site calibration’ has
been previously stored
Elapsed time : timer
Applied gas : enters the concentration of
the applied calibration gas
Measured gas : measures the concentration
of the applied gas
Is : 'Is' current from the sensor
Ia : 'Ia' current from the sensor
07/08/14
10:00
On site calibration
Sensors
S2: CO OK
S3: NO OK
S4: NO
2
OK
On site calibration
Sensor CO
07/08/14
10:00
Is
uA
2.22
Measured gas
ppm
100.0
Applied gas
ppm
100.0
Elapsed time
Status ----
Calibrate
Ia
uA
0.17
→