Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 94)

<8. Detailed Data Setting>
8-11
IM 11M12A01-04E
8.6 Input Contact Settings
The converter input contacts execute set functions by accepting a remote (contact) signal. Table 8.12
shows the functions executed by a remote contact signal.
Table 8.12 Input Contact Functions
Set item Function
Calibration gas pressure
decrease
While a contact signal is on, neither semi-automatic nor automatic calibrations
can be made.
Measuring range change While contact input is on, the analog output range is switched to 0-25% O
2
.
Calibration start If a contact signal is applied, semi-automatic calibration starts (only if the semi-
automatic or automatic mode has been setup). Contact signal must be applied
for at least one second. Even though a continuous contact signal is applied, a
second calibration cannot be made. If you want to make a second calibration,
turn the contact signal off and then back on.
Unburnt gas detection If a contact signal is on, the heater power will be switched off. (An 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.
CAUTION
• Measurement range switching function by an external contact input is available for analog output
1 only and the range is fixed to 0-25%O
2
.
• To conduct a semi-automatic calibration, be sure to set the Calibration setup mode to “Semi-
automatic” or “Automatic”.
8.6.1 Setting Input Contact
To set the input contacts, follow the parameter codes given in Table 8.13.
Table 8.13 Parameter Codes for Input Contact Settings
Set item Parameter code Set value
Input contact 1 (function) E01 0 Invalid
1 Calibration gas pressure decrease
2 Measuring range change
3 Calibration
4 Unburnt gas detection
Input contact 2 (function) E02 0 Invalid
1 Calibration gas pressure decrease
2 Measuring range change
3 Calibration
4 Unburnt gas detection
Input contact 1 (action) E03 0 Operated when closed
1 Operated when open
Input contact 2 (action) E04 0 Operated when closed
1 Operated when open
8.6.2 Default Values
When the analyzer is delivered, or if data are initialized, the input contacts are all open.