User Manual HTS801
Humidity and Temperature Sensor for High Humidity and Chemically Polluted Conditions | 16
PLEASE NOTE
Replacing a rapidX probe results in an additional uncertainty in the RH measurement. This is due to the
variation of the capacitive coupling at the connector.
To ensure the initial accuracy of the HTS801, an adjustment after the rapidX smart probe exchange is
recommended.
If rapidX smart probes with different cable lengths are exchanged on an HTS801 (e.g. smart probe change
from 10 m to 1 m cable length), an adjustment must be carried out.
For Type T17 only the RH probe is exchangeable. The T probe is fixed.
3.5.3.
ARC Module (Option AM1)
The additional circuit board located in the lower part of the HTS801 enclosure offers the possibiliy to start the
ARC heating function with external signal.
Fig. 14 ARC module in polycarbonate enclosure
During the ARC process the orange LED 5 at the main PCB near the USB interface is permanently lit (refer to
Fig. 43). An orange frame and text on the display also indicates the ARC process. The remaining time span of the
ARC process is indicated in seconds in a device information register. Please refer to chapter 6.2.1. Modbus RTU
Setup. On the status page of the optional display, the remaining seconds of the ARC process are displayed.
Heating process and trigger parameters can be set and changed with the PCS10 and via the display and push-
buttons.
Electrical Connection
Terminal “Input”: External signal trigger
IN1 signal (24 V DC; 10 mA)
IN2 GND
Terminal “Status”: Feedback signal to the external control
NO./.R./.NC
The NO contact is closed during the heating process, otherwise opened.
open
closed
IN1 +24 V Input
NO
Output
Relais
ARC
Freezed outputs
>0.5 s
Fig. 15 ARC timing
