Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 128)

IM 11M12A01-03E 8-16
8.5 Input Contact Settings
8.5.1 Input Contact Functions
The converter input contacts execute set functions by accepting a remote contact signal.
Table 8.8 shows the functions executed by a remote contact signal.
Table 8.8 Input Contact Functions
Item Function
Calibration-gas press. low While the contact signal is on, neither semi-automatic nor
automatic calibration is possible.
Measuring range change While contact input is On, range of Analog Output 1 is switched as
follows: When analog output 1 range is set to "Humidity", then output
range is switched to 0 to 100% H
2
O. When analog output 1 range is
set to "Mixing ratio", then output range is switched to 0 to 1 kg/kg.
When analog output 1 range is set to "Oxygen", then range is switched
to 0 to 25% O
2
. While range is switched by the contact input,
[Range] is displayed on the screen. See Figure 8.12.
Calibration start 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 calibration is not repeated.
If you want to perform a second calibration,
turn the contact signal off and then back on.
Process If the contact signal is on, heater power will be switched off.
upset (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.
Blow back start 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, 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.")
T8.8E.EPS
Tag:
0.0
%H
2
O
4.00mA -Output1
4.00mA -Output2
Range
F8.12E.EPS
Figure 8.12 Changing Measuring Range with Input Contact