INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 35)

EN- 35 Sensistor ISH2000 Technical Reference Manual (TRM)
B 300
Status signal patterns
Status signals for pin 14 - 18.
Figure B-5: Example screen
Where:
DET_ERROR will go high for a short time (1-5 seconds) when the detector is
switched on. It will go low when the sensor has been checked. In normal oper-
ation, DET_ERROR = HIGH means that there is a problem with the sensor,
probe, or cable.
DET_WAIT is high when instrument is in warm-up mode after switching on
power. Instrument will also go into warm-up if there is a temporary fault in the
sensor or sensor connection.
The timing of the status signals in relation to different events is described by the
following two examples:
• Example: Input signals issued to control the APC system should have a pulse
length of at least 40 ms.
• Example: Output signals switch with a cycle time of 20 ms (0.02 s). This is the
cycle time of the APC system.
Note: Not valid for battery operated version of Sensistor ISH2000.
I/0 name on the screen Signal Name on the pins Function
Inputs 0 to 4 In_0 to In_4 Input signal
Outputs 0 to 6 Out_0 to Out_6 Output signal
Status O DET_ON When detector is on
Status W DET_WAIT High during warm-up
Status S DET_SIGNAL Gas detected / Sensor not
recovered
Status R LEAK_ALARM Leak above Reject Level
detected
Status C CAL_CONF Calibration preformed
and ok
Status E DET_ERROR High if Probe, Sensor or
Cable is broken