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<9. Calibration>
9-6
IIM 11M13A01-04E
CAUTION
(1) When instrument air is used for the span calibration, remove the moisture from the instrument air
at a dew-point temperature of -20°C and also remove any oily mist and dust from that air.
(2) If dehumidifying is not enough, or if foul air is used, the measurement accuracy will be adversely
affected.
Calibration Time
• When the calibration mode is in manual:
First set the hold (output stabilization) time. This indicates the time required from the end of
calibration to entering a measurement again. This time, after calibration, the measurement 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 8.3, “Setting Output Hold.”
• 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 9.4 shows the
relationship between the calibration time and hold (output stabilization) time.
Analog output remains hold
(when output remains hold)
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
F9-4E.ai
Figure 9.4
Calibration and Hold (Output stabilization) 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. After the first calibration is carried out, the next calibration will be executed
according to the preset calibration intervals.
Содержание ZR202S
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