Siemens 7MB2335, Operating Instructions Manual, Page: 72 / 168

Operation
5-22
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
5.8.1.2 Calibration: Calibrate IR Channels: Start with Range MR 1/2
The analyzer interrupts the current measurement if you call one of
these two dialogs. If the parameter
With AUTOCAL was set to OFF,
the analyzer expects an immediate flow of calibration gas; if the value
is set to
ON , an AUTOCAL is carried out prior to the flow of gas. The
values of the setpoint and actual-value calibrations are displayed in the
first two lines.
If the analyzer recognizes a flow of calibration gas, the display changes
as shown. If the measured value in the second line remains constant
for more than approx. 10 s or does not change significantly, press the
ENTER key.
The analyzer then compares the setpoint and actual value (measured
value) of the calibration. If the deviation between the values is within
the tolerance, the adjacent message is output. (
o.k. )
If the actual value is approx. 20 % greater or smaller than the setpoint
determined in the factory, the message
not o.k. appears instead (no
calibration possible).
5.8.2 Calibration: Calibrate O
2
Sensor
In this menu, you can call dialogs:
S
To re-enter the installation date of the O
2
sensor
S
To recalibrate the zero of the O
2
sensor.
5.8.2.1 Calibration: Calibrate O
2
Sensor: O
2
Cal. after Install
Following the installation of a new sensor, you must re-enter the
installation date.
The entered date is checked for plausibility. A calibration (AUTOCAL)
is then carried out with ambient air.
A check is carried out during this procedure to establish whether the
sensor voltage is greater than 9 mV. If this is not the case, a fault
message ”Sensor voltage too low”.
Set span: 386 mg/m
3
Reading: 1 mg/m
3
Connect span gas
5812
Set span: 386 mg/m
3
Reading: 1 mg/m
3
If the reading is
stable, press ENTER
5812a
Set span: 386 mg/m
3
Reading: 380 mg/m
3
Calibration o.k.
Press ESC to return
5812b
Set span: 386 mg/m
3
Reading: 5 mg/m
3
Tolerance not o.k.
Press ESC to return
5812c
O
2
cal. after install
Start O
2
zero cal.
582
O
2
cal after install
Date :01.01.2000
5821