Product guide

Humidity and Dew-Point Instruments
© Michell Instruments 2009-2011
36
HVAC
RM33 & 52
Electrical Connections
Voltage output mA output
Pin 1 Pin 1 Pin 1 Output RH + Pin 1 Output RH +
Pin 2 Pin 2 Pin 2 Output RH - Pin 2 Output RH -
Pin 3 Pin 3 Pin 3 Pin 3
Pin 4 Output temperature + Temperature sensor
Pt100/Pt1000
Pin 4
Temperature sensor
Pin 5 Output RH + Pin 4 Pin 5 Pin 4
Pin 6 Common ground Pin 5 Output RH + Pin 6 Pin 5
Pin 7 Power supply V+ Pin 6 Common ground Pin 7 Pin 6
Pin 8 Pin 7 Power supply V+ Pin 8 Pin 7
Pin 8 Pin 8
Humidity with temperature sensor Humidity with temperature sensor
Ordering Codes
To construct the order code, select the relevant feature from the tables below, starting with the base model, which is {Feature A} and then add on options to create a
string: {Feature A}+{Feature B}+{Feature C}
Order example:
RM33+3+T3
Relative humidity and temperature transmitter RM33, 0-10 V output, 0 to 50°C (+32 to +122ºF) temperature range
RM33 3 T3
Signal Output {Feature B}
4–20 mA (only possible with X, T4 or T5
in Feature C)
2
0–10 V 3
0–5 V 4
0–1 V 5
Temperature Signal {Feature C}
0 to +50ºC (+32 to +122ºF) T3
Pt100: -50 to +200ºC (-58 to +392ºF) T4
Pt1000: -50 to +200ºC (-58 to +392ºF) T5
Other output scaling available on request TX
RH signal only. No temperature output X
Base Model {Feature A}
Relative humidity and temperature
transmitter - 1pt calibration with
3% accuracy
RM33
RM52 5 T4
Signal Output {Feature B}
4–20 mA (only possible with X, T4 or T5
in Feature C)
2
0–10 V 3
0–5 V 4
0–1 V 5
Base Model {Feature A}
Relative humidity and temperature
transmitter 2pt calibration with 2%
accuracy
RM52
Temperature Signal {Feature C}
0 to +50ºC (+32 to +122ºF) T3
Pt100: -50 to +200ºC (-58 to +392ºF) T4
Pt1000: -50 to +200ºC (-58 to +392ºF) T5
Other output scaling available on request TX
RH signal only. No temperature output X