E Instruments E4500 Operating & Maintenance Manual page 55

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.
07/08/14
10:00
On site calibration
Sensors
S2: CO OK
S3: NO OK
S4: NO OK
2
4. The following describes a recalibration example for CO sensor.
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
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10:00
On site calibration
Sensor CO
Calibrate
Status ----
Elapsed time
Applied gas
100.0
ppm
Measured gas
100.0
ppm
Is
2.22
uA
Ia
0.17
uA
FLOW METER
55
Calibrate:
Status: not active:
active:
----:
Elapsed time:
Applied gas:
Measured gas:
Is:
Ia:
COMBUSTION ANALYZER
0.5 l/m
→
saves new calibration
returns to the factory
calibration
returns to the last calibration
made by the user
no 'on site calibration' has
been previously stored
timer
enters the concentration of
the applied calibration gas
measures the concentration
of the applied gas
'Is' current from the sensor
'Ia' current from the sensor
K000000000EJ 023826A0 100714