Space Temperature/Humidity
Transmitter With Display
Installation Instructions
AD Enclosure
Corporate Enclosure
Combined RH and
Temperature transmitter
Separate RH or
Temperature transmitter
Space Temperature/Humidity Transmitter
Designed for temperature or humidity measurement of occupied spaces. Featuring a digital display of the same
signal that is sent to the controller. AD enclosure features either temperature or humidity, Corporate enclosure
features both temperature and humidity.
Installation
Space sensors can be mounted directly on a wall or to a wall box. For the most accurate results, units should be
mounted on an inside wall to a wall box, away from any supply air exhausts and other sources of heat or cold.
The RH sensor and other components are static sensitive. If the PCB must be removed it should be handled by the
edges only. Do not touch the RH sensor as it could be damaged.
Specifications
Specification
Temperature
Humidity
Temperature/Humidity
Operating Temperature
Range
0 to 70 ºC
(32 to 158 ºF)
0 to 70 ºC
(32 to 158 ºF)
0 to 70 ºC
(32 to 158 ºF)
Power Supply
22-30 Vdc
(with 250 ohm load)
22-30 Vdc
(with 250 ohm load)
18-30 Vdc
(with 250 ohm load)
Display Range
Same as transmitter range
0 to 100 % RH
Same as transmitter range (temp)
0 to 100 % RH
Wiring Connections
Screw Connectors,
14 – 22 awg
Screw Connectors,
14 – 22 awg
Screw Connectors,
14 – 22 awg
Output Signal
4-20mA
4-20mA
4-20mA/4-20mA
Transmitter Accuracy
+/- 0.1% span
+/- 2, 3 or 5 %RH
Same as individual units
Display Accuracy
+/- 0.2 ºC or ºF
+/- 0.5% RH
+/- 1% RH, +/- 0.5 ºC or ºF
Calibration
Field calibration of these devices is not recommended as it requires the removal of the sensors. However, if it
becomes necessary to adjust the calibration, the 4-20 mA output can be adjusted with the TZ & TS pots
( temperature zero and span) and the RZ & RS pots (RH zero and span). The displays on the AD units can also be
adjusted independent of the 4-20mA signal by the pots that are accessible from the back of the PCB (see the
drawings on the following page). The temperature display on the RH/Temperature combination PCB can be
adjusted with the pot labeled LCD. It is a single point adjustment. The RH display can not be adjusted on this
unit.
REV001 05/99
Wiring
The terminals are marked on the board as Power (24Vdc in) and Out (signal output) for the AD units, and as
Power (24Vdc in), T_Out (temperature signal output) and RH_Out (RH signal output) for the Corporate unit.
These devices are wired as standard 4-20mA loop-powered analog input points.
RH Transmitter with LCD
Temperature Transmitter with LCD
LCD
Span
LCD
Zero
LCD
Zero
LCD
Span
RH & Temperature Transmitter with LCD
+ 24Vdc Power in
AI#1 4-20mA out
AI#2 4-20mA out