Single-Point Calibration - ABB ZDT Installation And Operating Manual

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

7.1 Single-point Calibration

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.
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
14
Oxygen Calibration Sequence
Cell Zero mV
0. 0
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 successful
two-point calibration or 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 one-point calibration sequence.
Connect to Air
Connect the air supply to the probe (refer to the probe's installation and
operating instructions, IM/ZGP2 ). 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:
Span % of Theory
operate using parameters stored during the last successful calibration.
Press
Press
Calibration Pass: Calibration sequence successful
Failed Constant:
Failed Unstable:
Note. If the sensor calibration is unsuccessful then the
parameters are unaffected. The instrument continues to
to return to the top of the
to advance to the
Secure Parameters Page.
or switch.
Cell offset >±10mV
(upper display shows cell mV output)
Cell output unstable (drifting).
Oxygen Calibration Page.
and
Cell Zero mV