Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 132)

IM 11M12D01-01E 8-6
5) During Blowback
For Semi-Automatic Blowback
When blowback is started from the Blowback display, "during blowback" is the time
that starts when you touch the Enter key on the Blowback display with Start blow back
selected (Figure 8.8), lasts while blowback is being performed for all installed channels,
and ends after a preset hold time has elapsed.
When blowback is started by a contact input, "during blowback" is the time that starts
when blowback is started by the contact input, lasts while blowback is being performed
sequentially for all installed channels, and ends after a preset hold time for the last
performed channel has elapsed.
For Automatic Blowback
"During blowback" is the time that starts when blowback is started at a preset timing,
lasts while blowback is being performed sequentially, and ends after a preset hold time
for the last performed channel has elapsed.
Enter
Start blow back
᭜ Cancel blow back
F09E.EPS
Blow back
Fig. 8.8 Blow back display
6) Process Gas Alarm
Process gas alarm status lasts from when a contact input representing the process gas
alarm occurs until the input turns off.
7) Error
Error status exists from when the error occurs until it is cleared.
8) No valid channels in averaging group
When no channels are assigned to an averaging group, or when the statuses of allocated
channels are "Disabled", "Error", "Warmup" or the like, so that no valid channel
average value can be calculated.
<Output Hold status priority order>
When several different statuses that result in Output Hold occur, the following priority
applies:
For individual channels outputs
Priority 1 Error status
Priority 2 Process Gas Alarm
Priority 3 Calibration, Indication Check, or Blowback
Priority 4 (Under) Maintenance
Priority 5 Warmup
For averaging outputs
Priority 1 Process Gas Alarm
Priority 2 (Under) Maintenance
Priority 3 No valid channels in Averaging Group