Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 148)

IM 11M13A01-02E 9-7
9. Calibration
9.2.1.5Setting Calibration Time
• When the calibration mode is in manual:
First set the output stabilization time. This indicates the time required from the end of
calibration to entering a measurement again. This time, after calibration, the measure-
ment gas enters the sensor to set the time until the output returns to normal. The output
remains held after completing the calibration operation until the output stabilization time
elapses. The calibration time set ranges from 00 minutes, 00 seconds to 60 minutes, 59
seconds. For more details, consult Section 8.1,”Setting Output Hold”. When the calibra-
tion mode is in semi-automatic, set the output stabilization time and calibration time.
The calibration time is the time required from starting the flow of the calibration gas to
reading out the measured value. The set calibration time is effective in conducting both
zero and span calibrations. The calibration-time set ranges from 00 minutes, 00 seconds
to 60 minutes, 59 seconds. Figure 9.6 shows the relationship between the calibration
time and output stabilization time.
Analog output remains held
(when output remains held)
Calibration start
(contact or switch input)
Span calibration
(span-gas valve open)
Zero-point calibration
(zero-gas valve open)
Analog output status
Calibration time
Calibration time
Stabilization
time
F9.6E.EPS
Figure 9.6 Calibration and Output-stabilization Time Settings
• When the calibration mode is in automatic:
In addition to the above output stabilization time and calibration time, set the interval,
start date, and start time.
Interval means the calibration intervals ranging from 000 days, 00 hours to 255 days, 23
hours.
Set the first calibration date and the start-calibration time to the start date and start time
respectively. For example, to start the first calibration at 1:30 p.m. on March 25, 2001,
enter 25/03/01 to the start date and 13 hours, 30 minutes to the start time, following the
steps below: