Single-Point Calibration - ABB ZDT–FG Series Installation And Operating Manual

Note. Before commencing a gas calibration procedure the analyzer and probe must be switched on and allowed to operate
for at least one hour to allow the system to stabilize thermally.

7.1 Single-point Calibration

The calibration sequence involves standardizing the analyzer and the oxygen probe, using air as the test gas. Until a calibration
sequence has been completed successfully, the existing slope remains unaffected.
-----
OXYGEN CAL. SEQ.
0. 0
Cell Constant mV
100. 0
Span % of Theory
0000. 0
Cal. User Code
-----
One Point Cal.
Two Point Cal.
Preset Cal.
20. 9 5
Connect to Air
20. 9 5
Calibrating Air
-----
Calibration Pass
Failed Constant
Failed Unstable
SECURITY CODE
Oxygen Calibration Sequence
Cell Constant mV
The upper display shows the millivolt offset of the oxygen probe from the last
successful calibration.
Span % of Theory
A value between 90 and 110% should be displayed. The display indicates the
oxygen probe output slope using parameters derived at the last successfull
two-point calibration or using the preset values.
Calibration User Code
[00000 to 19999]
If an incorrect value is entered, access to the calibration page is inhibited and
the display returns to the top of the oxygen calibration page.
One Point Calibration
Select the one-point calibration sequence.
Connect to Air
Connect the air supply to the probe (refer to the probe operating instructions,
IM/ZFG2 ). The upper display indicates the measured % oxygen.
Calibrating Air
The upper display indicates the measured % oxygen. When a stable reading is
detected the display advances automatically to the next frame. To abort
calibration, press either the
Calibration Pass/Fail
On completion a calibration status message is displayed:
Calibration Pass
Failed Constant
Failed Unstable
Note. If the sensor calibration is unsuccessful then the 'Cell Constant mV' and
'Span % of Theory' parameters are unaffacted. The instrument continues to
operate using parameters stored during the last successful calibration.
Press to return to the top of the
Press to advance to the
7 PROGRAMMING...
or switch.
Calibration sequence successful
Cell offset >±10mV
(upper display shows cell mV output)
Cell output unstable (drifting).
Oxygen Calibration Page.
Secure Parameters Page.
15