Hanwell Smart Receiver 2 (SR2)
Instruction Manual
IM6001 - 3 Page 16 of 22
hanwell.com
Note on Thermistor Sensors:
Ensure the 30k9 Load Resistance is selected in the Calibration section of the Sensor
properties in the EMS software.
Notes on Accuracy:
Due to the nature of the connections, the onboard Thermistor channels have an
accuracy of +/- 0.5⁰C and the Humidity channel has an accuracy of +/-3%.
For greater accuracy, you should use RL4000 or RL5000 radio sensors (+/- 0.2⁰C and
+/-% as standard).
Note on Stability:
If the Thermistor or RH channels produce unstable results, fit a 10μF tantalum electrolytic
capacitor across the relevant terminals.
This operation is polarity sensitive, so the capacitors should be fitted as follows:
EMS Sensor Type Channel Capacitor Connections
RL2000 Dual Thermistor
Thermistor A
Pin 1: Positive
Pin 2: Negative
Thermistor B
Pin 3: Positive
Pin 4: Negative
RL2000 RH/Thermistor
RH
Pin 6: Positive
Pin 8: Negative
Thermistor
Pin 7: Positive
Pin 8: Negative
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