INFICON Sensistor ISH2000 HySpeed Hydrogen Leak Detector - Manual (Page 32)

Hydrogen leak detector Sensistor ISH2000 HySpeed - Operating Instructions
32 OP-Sensistor ISH2000 HySpeed-EN-201203
EN
Status signal patterns
Table 8-3. Status signals for pin 14 - 18 (see “Pin configuration.” on page 31).
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 operation, 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 10 ms (0.01 s). This is the cycle
time of the APC system.
After power on
14 OUT DET_ERROR
15 OUT LEAK_OUT
16 OUT DET_ON
17 OUT DET_SIGNAL
18 OUT DET_WAIT
19 OUT OUT_0
20 OUT OUT_1
21 OUT OUT_2
22 OUT OUT_3
23 OUT OUT_4
24 OUT OUT_5
25 OUT 24 VDC OUT
Pin Type Signal name
Signal Function
DET_SIGNAL Gas detected / Sensor not recovered.
DET_WAIT High during warm-up.
DET_ON High when detector is on.
LEAK_ALARM Leak above Reject Level detected.
DET_ERROR High if Probe, Sensor or Cable is broken.