YOKOGAWA RC400G, Руководство пользователя

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<7. Calibration>
7-4
IM 12F4A1-01E
F7.2.3.ai
T1: Automatic zero calibration cycle
T2: Automatic zero calibration preparation time
T3: Zero calibration time
T4: Automatic zero calibration relaxation time
* Zero calibration time may vary depending on
calibration condition.
(Maximum time = limit value of response time)
SV6 (zero water/
measurement)
Output hold
T1
T2
ON
OFF OFF
T1 T1
ON
ON
ON
OFF
OFF OFF OFF
T3 *
T4
T2 T3 *
T4
Figure 7.2 Automatic Zero Calibration Sequence
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Zero Filter Flushing Function
This function is activated to prevent corrosion of the activated charcoal filter and is enabled when
the following conditions are met.
1) Automatic zero calibration is set to “on.”
2) Automatic calibration cycle is longer than one day.
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Flushing Cycle and Sequence
The flushing is activated once every 24 hours and this cycle is fixed. When the flushing is
activated, the analog output is held and the <HOLD> lamp turns on. Chlorine-free water is
supplied for the preparation time of automatic zero calibration and sample water is supplied for
the relaxation time of automatic zero calibration. After the flushing is completed, the held analog
output is released and the <HOLD> lamp turns off.
The timer of zero filter flushing cycle is activated or deactivated in the following condition.
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The timer is activated when:
• the power is turned on, provided that the analyzer is preset so that it meets the conditions
that enable the zero filter flushing function.
• the automatic calibration function is set to “on,” provided that the automatic zero calibration
cycle is preset to one longer than one day.
• the automatic zero calibration cycle is changed to the one longer than one day, provided that
the automatic calibration function is preset to “on.”
* When the timer is activated, the counter is reset.
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The timer is deactivated when:
• the automatic calibration function is changed to “oFF” while the zero filter flushing timer is
running.
• the automatic zero calibration cycle is changed to one day or shorter while the zero filter
flushing timer is running.
14th Edition : Jul. 15, 2020