YOKOGAWA av550g, Руководство пользователя

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< 10. Other Functions >
10-13
IM 11M12D01-01E
10.4.4 Setting Indication Check Timing
All timing parameters set in the [Calibration setup] display applies to indication check timing. The
timing can also be set from the [Indication check setup] display. Note, however, that the timing
parameters set in the [Indication check setup] display are reflected in the timing setting for calibration.
Once the indication check starts on a channel, its individual analog output is held at a value preset in
the Output Hold Setup and excluded from averaging group calculations until the output hold time has
elapsed.
After the hold time has elapsed, the indication check of the next channel is started. A timing chart
showing indication check time, hold time, analog output status, check gas switching solenoid contact
action, is provided in Figure 10.12. For details on solenoid valve piping and wiring, refer to Subsection
4.2.6, “Piping for Indication Check” and Section 5.3, “Wiring and Piping Examples.”.
Table 10.3 When Auto Indication Check conflicts with Other Processing
Other processing
Indication check
Purging
the
channel
Other
channel
CAL
Indication
Check in
other channel
Blow back
in other
channel
Mainte-
nance
IND Check
chan. in
warmup status
IND Check
chan. in Error
status
IND Check
chan. now
disabled
Manual
Indication Check
x x x x x x x x
Semi-auto
Indication Check
x x x x x x x x
Auto
Indication Check
Wait Wait Wait Wait Wait x x x
X : Cannot perform indication check
Wait : Wait until other command finishes before starting indication check
NOTE
When setting, observe the following cautions:
Observe the following cautions when setting the indication check timing.
1) You can select [Indication check setup timing] and set values, but these will be reflected in the
[Calibration setup timing] settings.
2) When indication check is to be started by a contact input signal, you need to set the relevant
contact input to Indication check start on the [Input contacts] display.
3) Indication check may be delayed or canceled by status of the channel to be checked or by the
status of other channels, as explained by Table 10.3.
4) If the (indication check/calibration) interval setting is shorter than the sum of indication check
times plus hold (stabilization) times for all channels, then the system will be in indication check
status when the second indication check cycle attempts to start. In this case, the second
indication check will be cancelled. (For a 3-point check with zero check, span check, and third
gas check, the time required for all three checks is going to be three times as long as for a single
check.)
5) If interval is set to 000 day 00 hour, then auto indication check is not performed.
6) If you set start date before the current date, then auto indication check will not start.