Input Contact Settings; Input Contact Functions - YOKOGAWA EXAxtZR Instruction Manual

8.5 Input Contact Settings

8.5.1

Input Contact Functions

8-14
The converter input contacts execute set functions by accepting a remote dry-contact
("voltage-free contact") signal. Table 8.7 shows the functions executed by a remote
contact signal.
Table 8.7 Input Contact Functions
Item
Calibration-gas pressure
drop
Measuring range change
Calibration start
Process upset
(Unburnt gas
detection)
Blow-back start
Tag:
21.0
7.35mA -Output1
7.35mA -Output2
Range
Figure 8.10 Changing Measuring Range with Input Contact
Note
1. Measurement range switching function by an external contact input is available for
analog output1 only.
2. When making a semi-automatic calibration, be sure to set the semi-automatic or
automatic mode using the Calibration setup display.
When carrying out "blowback," be sure to set "blowback" in the output contact setup.
Function
While the contact signal is on, neither semi-automatic nor
automatic calibration is possible.
While contact input is On, range of Analog Output 1 is switched to
0-25% O and "Range" is displayed on the screen. See Figure 8.10.
2
If the contact signal is applied, semi-automatic calibration
starts (only if the semi-automatic or automatic mode has been
setup). Calibration is started with an applied one- to 11-second
time interval single-output contact signal. Even if
a continuous contact signal is applied, a second calibration is not
repeated. If you want to perform calibration, turn the contact
signal off and then back on.
If the contact signal is on, heater power will be switched off.
(A one- to 11-second time interval single-output signal is
available as a contact signal.) If this operation starts, the sensor
temperature decreases and an error occurs. To restore it to normal,
turn the power off and then back on, or reset the analyzer.
If the contact signal is on, blow-back starts. (A one- to 11-second
time interval single-output signal is available as a contact signal.)
Even if a continuous contact signal is applied, a calibration is not
repeated. If you want to make a second calibration,
turn the contact signal off and then back on. (Refer to Section 10.2,
"Blow-back.")
%O2
F8.10E.EPS
T8.7E.EPS
IM 11M12A01-02E