Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 175)

IM 11M12D01-01E 10-13
10. Other Functions
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
T10.3E.eps
X : Cannot perform indication check
Wait : Wait until other command finishes before starting indication check
Purging
the
channel
Other
channel
CAL
Indication
Check in
other channel
Blowback in
other
channel
CAL chan.
in warmup
status
CAL chan.
in ERR
status
CAL chan.
now
disabled
Maintenance
Man. Indication
Check
.
SemiAuto
Indication Check
Auto Indication
Check
Wait Wait Wait Wait Wait
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x x x
CAUTION
When setting, observe the following cautions:
Observe the following cautions when setting the indication check timing.
1) You can select [Indication check timing] and set values, but these will be reflected in
the [Calibration 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 indica-
tion check times plus hold times for all channels, then the system will be in indica-
tion 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.