62
@IST01530EEJ 019175A0 190411
6.7 On-site recalibration
It is possible to make a recalibration of the instrument’s gas sensors with known concentration gas cylinders.
Recalibration of Oxygen (O
2
) sensor is not available since it is already recalibrated during every autozero cycle.
The access to the sensor recalibration is passw ord protected, the password is ' 1111 '.
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 flowmeter and to the instrument
6.7.1 Flow Chart - On-site recalibration
When depressed for at least 2 seconds, turns the instrument on.
►RefO
2
Auto:001 ▼
O
2
4.2٪
CO
2
9.3٪
Xair 1.25
Tf 190.1C
Ta 15.4C
∆T 74.7C
Eff 83.4٪
Loss16.6٪
CO 146p
NO 40p
SO
2
41p
NO
X
51p
WARNING
Insert the gas probe
in the chimney
AUTOZERO STARTED
WARNING
Starting combustion
analysis
AUTOZERO COMPLETED
Autozero: 25
Bat.:94 ٪
Time:11.33
Date:09/18/03
autozero
►Mem.: 001
Fuel: Natural gas
Oper.:
Rep.: full
Mode: manual
MEMORY
Autozero cycle end
Or
automatically, after 10 seconds.
4400-S
SN:00001 Ver:1.00
Automatically, after 10 seconds.
Or
automatically, after 10 seconds.
ATTENTION
Make sure autozero is executed in clean air.
ATTENTION
Check the battery charge level or connect the
power adapter to av oid data loss during
recalibration.
ATTENTION
Do not connect the gas probe to the instrument.
1
2
3
4
5
6
7
8
Depress key and with mov e the cursor to 'Calibration'.
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