Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 135)

<9. Calibration>
9-7
IM 11M12A01-02E
9.2.1.5 Setting Calibration Time
• When the calibration mode is in manual:
First set the “Hold time” (output stabilization time). This indicates the time required from the
end of calibration to entering a measurement again. This time, after calibration, the sample
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 hold (output stabilization) time elapses.
The calibration time set ranges from 00 minutes, 00 seconds to 60 minutes, 59 seconds. For
more details, consult Section 8.2, Output Hold Setting. When the calibration mode is in semi-
automatic, set the hold (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 hold (output stabilization) time.
Analog output remains held
(when output remains held)
Calibration start
(contact or switch input)
Span calibration
(span gas valve open)
Zero calibration
(zero gas valve open)
Analog output status
Calibration time
Calibration time
Hold (output
stabilization) time
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Figure9.6 Calibration and Hold Time Settings
• When the calibration mode is in automatic:
In addition to the above Hold (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 day 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:
(1) Select the “Calibration timing” display. A panel display as shown in Figure 9.7 appears.
(2) Select each item for the calibration to display the numeric-data entry display. Enter the
desired numeric values for the calibration.
Enter
Hold time: 1 0 min 0 0 s

Cal time: 1 0 min 0 0 s
 lnterval: 3 0 d 0 0 h
 Start date: 0 1 / 0 1 / 0 0
 Start time: 0 0 : 0 0
Calibration timing
F9.7E.ai
Figure 9.7 Calibration Timing Display
8th Edition : Jan.13,2012-00