Product guide

Humidity and Dew-Point Instruments
© Michell Instruments 2009-2011
38
HVAC / Environmental Control
WM33 & 52
Electrical Connections
3/4 wire V DC power supply voltage
output
2 wire V DC power supply mA output 3/4 wire with display
Pin 1 Pin 1 Pin 1 Output temperature +
Pt100/Pt1000 Pt100/Pt1000 Pin 2 Common ground
Pin 2 Pin 2 Pin 3
Output RH , Dew Point, Absolute
Humidity +
Pin 2 Output temperature + Pin 1 Output temperature - Pin 4 Power supply V+
Pin 3 Common ground Pin 2 Output temperature +
Pin 4 Output RH + Pin 3 Output RH +
Pin 5 Power supply V + Pin 4 Output RH -
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}+{Feature D}+{Feature E}+{Feature F}
Order example:
WM52+5+DX+H+T3
Relative humidity and temperature transmitter WM52, 0-1 V output, with display, relative humidity confi guration and 0 to 50°C temperature range
WM33 5 T3
Signal Output {Feature B}
4–20 mA 2
0–10 V 3
0–5 V 4
0–1 V 5
Temperature Signal {Feature C}
-20 to +80ºC (-4 to +176ºF) T1
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
WM33
WM52 5 DX H T3
Signal Output {Feature B}
4–20 mA 2
0–10 V 3
0–5 V 4
0–1 V 5
Display {Feature C}
Display version (not possible with 4-20
mA output)
DX
No display XX
Moisture Signal {Feature D}
Absolute Humidity (g/m
3
) (only with T1) A
Dew-point (Tdew) (only with T1) D
Relative humidity H
Base Model {Feature A}
Relative humidity and temperature
transmitter
WM52
Filter {Feature E)
-20 to +80ºC (-4 to +176ºF) T1
0 to +50ºC (+32 to +122ºF) T3
Pt100: -50 to +200ºC (-58 to +392ºF) class A T4
Pt1000: -50 to +200ºC (-58 to +392ºF) class A T5
Other output scaling available on request TX
RH signal only. No temperature output X