Product guide

Humidity and Dew-Point Instruments
© Michell Instruments 2009-2011
58
Precision Manufacturing
WR293
Electrical Connections
Pin Pin
1 Power Supply V + 8 Output Channel 2 Ground
2 Power Supply V - 9 RS485 Data +
3 Output RS485 Ground 10 RS485 Data -
4 Ground 11 Not connected
5 Output Channel 1 Temperature + 12 Not connected
6 Output Channel 1 Ground 13 Output Channel 3 (optional)
7 Output Channel 2 RH + 14 Output Channel 3 Ground (optional)
Do not connect pin 2 (V -) to pin 4 (Ground)
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: WR293+A+0+IP6+N030+P180
Digital RH and temperature transmitter WR293, 4-20 mA output, dew point calculated, stainless steel probe with 2m (6.56’) cable and stainless steel sintered fi lter, -30 to
+180ºC (-22 to +356ºF) temp range
WR293 A 0 IP6 N030 P180
Signal Output {Feature B}
4-20 mA A
0-10 V B
0-5 V C
0-1 V D
0-20 mA E
Base Model {Feature A}
Digital RH and temperature transmitter -
Remote Probe for High Temperatures
WR293
3rd Output {Feature C}
Dew point: -40 to +100ºC 0
Mixing ratio: 0-500 gr/Kg 1
Absolute Humidity: 0-600 g/m
3
2
Specifi c enthalpy: -40 to 1500 KJ/Kg 3
Frost point: -50 to +10ºC 4
Probe Type {Feature D}
SS probe, cover & mesh fi lter, 2m (6.56') cable IP2
SS probe, cover & mesh fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
IP5
SS probe, cover & sinter fi lter, 2m (6.56') cable IP6
SS probe, cover & sinter fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
IP7
PEEK probe, cover, SS mesh fi lter, 2m (6.56')
cable
IP8
PEEK probe, cover, SS mesh fi lter, 2m + 2m
extension (6.56’ + 6.56’) cable
IP9
Temp High {Feature F}
+20°C (+68°F) P020
+30°C (+86°F) P030
+50°C (+122°F) P050
+70°C (+158°F) P070
+100°C (+212°F) P100
+140°C (+284°F) P140
+150°C (+302°F) P150
+180°C (+356°F) P180
+200°C (+392°F) P200
Other output scaling available on request XXXX
Temp Low {Feature E}
0°C (+32°F) 0000
-20°C (-4°F) N020
-30°C (-22°F) N030