YOKOGAWA EXAxt ZR22G, User Manual, Page: 125 / 211

<8. Detailed Data Setting>
8-12
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
8.4.3 Default Values
When the analyzer is delivered, or if data are initialized, alarm and other setting defaults are as
shown in Table 8.7.
Table 8.7 Output Contact Default Settings
Item to be selected Output
contact 1
Output
contact 2
Output
contact 3
Output
contact 4
Alarm
settings
High-high limit alarm �
High limit alarm ON �
Low limit alarm ON �
Low-low limit alarm �
Calibration coefficient alarm �
Startup power stabilization timeout alarm �
Error ON
Other
settings
Warm-up ON �
Output range change �
Calibration ON �
Maintenance ON �
Blow back �
High limit temperature alarm �
Calibration gas press. low (default) (default) (default) �
Process upset �
Operating contact status Open Closed Closed
Closed
(fixed)
Note: Blank boxes in the above table indicate that the default is “disabled“.
8.5 Input Contact Settings
8.5.1 Input Contact Functions
The converter input contacts execute set functions by accepting a remote dry-contact (“voltage-
free contact”) signal. Table 8.8 shows the functions executed by a remote contact signal.
Table 8.8 Input Contact Functions
tem Function
Calibration gas pressure low Contact input disables Semi-automatic or Automatic Calibration.
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 “Oxygen”, then range is switched to 0 to
25% O
2
. 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.
While range is switched by the contact input, [Range] is displayed on the
screen. See Figure 8.9.
Calibration start Contact input starts Semi-Automatic Calibration. Calibration Mode setting must
be [Semi_Auto] or [Auto]. Contact signal must be applied for at least 1 sec. Even
if input signal continues to be applied, calibration is not repeated unless contact
input is released then reapplied.
Process upset
(Combustible gas detection)
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.
Blow back start Contact input starts Blow back. Contact signal must be applied for at least 1 sec.
Even if input signal continues to be applied, Blow back is not repeated unless
contact input is released then reapplied. (Refer to Section 10.4, Blow Back.)