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Blow back, 5 performing blowback – Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G User Manual

Page 186

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IM 11M12D01-01E

10-24

10.5.5 Performing Blowback

10.5.5.1 Semi-Auto Blowback

Semi-auto blowback can be started from the display or by an external contact input.


Starting blowback from the display

1) On the basic panel display, touch the Setup key to display the Execution/Setup

display. Select [Blowback]. Next select [Blow back start] and touch the Enter key.
Blowback is performed starting from Channel 1.

2) If a display like Figure 10.27 appears, then mode is set to [No function]. Refer to

Section 10.5.1, "Mode" and change the mode appropriately.

3) During blowback a display like Figure 10.28 is displayed, with the affected channel

number blinking.

4) To abort blowback, you can touch the Reject key to skip the blowback time and enter

the hold time. If you touch the Enter key here, then blowback for the next channel
starts; if you touch the Reject key, then hold time is skipped and you revert to
measurement mode.

Enter

F77E.EPS

Blow back

Blow back mode is
No function
or Not set contact.

Ch1
9. 1 9 %

O2

Ch2
2 1. 9 %

O2

Ch3
2 0. 3 %

O2

Ch4
2 1. 7 %

O2

Ch5
2 1. 1 %

O2

Ch6
2 0. 7 %

O2

Ch7
2 0. 3 %

O2

Ch8
1 9. 6 %

O2

F78E.EPS

BLOW TIME

Blow back

Fig 10.27 No Function (Disabled) Fig. 10.28 Performing blowback

Starting Blowback 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 blowback.

2) In measurement mode (with the basic panel display displayed) when the contact input

is detected then blowback starts.

3) To abort blowback, touch the Reject key. Touch the Reject key to skip the blowback

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 blowback for the next channel starts.

10.5.5.2 Auto Blowback

No user action is required to start blowback at the preset time and repeat it at the preset
interval.