<10. Other Functions>
10-12
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
10.5 Blow Back
This section explains the parameter settings for performing blow back.
10.5.1 Mode
There are three modes of blow back operation: no function, semi-automatic, and automatic.
Blow back is not performed when the mode is set to “No function”. In “Semi_Auto” mode, blow
back can be started by key operation on the display or by a contact input signal, and then
is automatically performed at preset intervals. For “Semi_Auto” or “Auto” modes, blow back is
performed. The following restrictions apply:
l When “None” is selected:
Blow back is not performed
l When “Semi-automatic” is selected:
Semi-auto blow back can be performed. (Blow back does not start at Auto blow back start time.)
l When “Automatic, semi-automatic” is selected:
Blow back can be performed in either “Auto” or “Semi_Auto” mode.
(1) “Converter menu” > “maintenance” > Blowbak setting”
(2) Select “mode” then you can select “None”, “Semi-automatic”, “Automatic, semi-automatic”.
Figure 10.18 Blowback setting
10.5.2 Operation of Blow back
The timing chart of blowback operation is shown next. To perform blowback on contact input signal, input
a contact signal for at least 1 second and not more than 11 seconds. When blowback is initiated, contact
output repeats opening and closing approximately every 10 seconds during setup blowback time. After the
hold” until the Hold time has elapsed (see Section
“8.2 Output Hold Setting”). For the Hold time, set
a time period from when the blow back ends until the sample gases are replaced in the detector and the
output returns to the steady state.
Analog output remains held
(with HOLD feature specified)
ON-time period of 1 to 11 seconds for the contact input
Blow back start
(with contact input or
touchpanel operation)
Blow back time
Contact output
(blow back switch)
ON
(for 10
seconds)
ON
(for 10
seconds)
OFF
(for 10 seconds)
Analog output
Hold time
ON
(for 10
seconds)
F10.9E.ai
Figure 10.9 Operation of Blow back
To Next Page
Loading...
Need help?
General
