< 10. Other Functions >
10-24
IM 11M12D01-01E
Starting Blow back by a Contact input
1) Confirm that on the [Input contacts] display, [Blow back start] is selected for the contact to be
used to start blow back.
2) In measurement mode (with the basic panel display displayed) when the contact input is
detected then blow back starts.
3) To abort blow back, touch the Reject key. Touch the Reject key to skip the blow back time and
enter the hold time. If you touch the Reject key again during hold time, then hold time is skipped
and you revert to the basic panel display; if instead you touch the Enter key then blow back for
the next channel starts.
Auto Blow back
No user action is required to start blow back at the preset time and repeat it at the preset interval.
10.6 Purging
At the beginning of calibration, condensation that has developed in the calibration gas piping may be
blown onto the sensor, causing sudden cooling and damage to the sensor. Purging involves passing
span calibration gas through the piping for a preset time before warmup, in order to remove any such
condensation. If the cell temperature is 100°C or greater, then purging cannot be performed. While
purging is being performed, a [Purge] status mark is displayed on the basic panel display, as shown
in Figure 10.31. Purging is performed in sequence, starting with the smallest channel number. The
timing of purging is shown in Figure 10.29.
F10-29E.ai
Power ON
Ch1 detector
Ch2 detector
Ch3 detector
Ch4 detector
Purging
Warmup
Measurement mode
Waiting
Purging
Warmup
Measurement mode
Waiting
Purging
Warmup
Measurement mode
Waiting
Purging
Warmup
Measurement
mode
Figure 10.29 Purging Timing
NOTE
1) When using hot swap functions to start a single specific channel, purging for that channel alone
is performed (there is no effect on other channels).
2) While any such specific individual channel is being purged, then manual or semi-auto calibration
or indication check cannot be started (for any channel).
3) While any such specific individual channel is being purged, then auto calibration, auto indication
check or auto blow back (for any channel) will wait until it ends.
4) Purging requires the same piping and wiring as calibration and indication check.
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