E Instruments E4500 Operating & Maintenance Manual page 54

Calibration procedure
To carry on the recalibration the following instruments are needed:
- Known concentration gas cylinder suitable for the sensor, complete with a pressure regulator
- Flow meter
- Hose with Tee fitting to connect the cylinder to the flow meter and to the instrument
In the following is described a recalibration example for the CO sensor.
1. Start the instrument
Keep
pressed for
a few
seconds
ATTENTION
Make sure autozero is performed in clean air and completes properly.
•
Do not connect the gas probe to the instrument.
•
Check the battery charge level or connect the power adapter to avoid data loss
•
during recalibration.
2. Once autozero is completed press the
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Diagnostic
Sensors Gas probe
Hardware Pump
On site cal.
E4500-N
Serial number: 1000
Firmware version: 1.00
Password
On site calibration
OK
0 0 0 0
OK
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Combustion analysis
O
2
%
CO
2
%
Ex. Air
1.25
T flue
190.1
°C
T air
15.4
°C
∆T
74.7
°C
Loss tot
%
Eff. tot
91.4
%
key and select the diagnostic icon.
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Enter the
recalibration menu
password 1111.
54
10:00
Combustion analysis
O
4.2 2
%
CO
9.3 2
%
Ex. Air
T flue
°C
T air
°C
∆T
°C
Loss tot
8.6
%
Eff. tot
%
Password
On site calibration
1 1 1 1
OK
K000000000EJ 023826A0 100714
→
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4.2
9.3
1.25
190.1
15.4
74.7
8.6
91.4
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OK