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.
