DWYER INSTRUMENTS, INC.
Phone: 219/879-8000
www.dwyer-inst.com
P.O. Box 373 • Michigan City, IN 46360-0373, U.S.A.
Fax: 219/872-9057
e-mail: [email protected]
The Series RHP-W Wall Mount Humidity/Temperature/Dew Point Transmitter
is the most versatile room transmitter on the market. The stylish housing is well
vented to provide air flow across the sensor to improve measurement accuracy. An
optional LCD display can be integral to the transmitter or a remote display can be
ordered for building balancing or LEED validation. The LCD display indicates the
ambient temperature along with the humidity or dew point. The transmitter has
internal dip switches to select the temperature engineering units and whether the
transmitter outputs humidity or dew point.
The humidity and temperature sensors are field replaceable to reduce service cost
and inventory. The humidity and the dew point are measured using a capacitive
polymer sensor that completely recovers from 100% saturation. The humidity and
dew point can have either a current or voltage output, while the optional tempera-
ture output can be a current, voltage, RTD or thermistor. For models with current
or voltage for the temperature output, the temperature range is field selectable.
INSTALLATION
Series RHP-W Wall Mount Humidity/Temperature/Dew Point Transmitter
Specifications - Installation and Operating Instructions
Bulletin H-RHP-W
SPECIFICATIONS
Relative Humidity Range:
0 to 100% RH.
Temperature Range:
-40 to 140°F (-40 to 60°C) for thermistor and RTD sensors.
-20 to 140°F (-28.9 to 60°C) for solid state temperature sensors.
Dew Point Temperature Range:
-20 to 140°F (-28.9 to 60°C); 0 to 100°F
(-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C) field selec-
table ranges.
Accuracy:
RH:
Model RHP2 ±2% 10-90% RH @ 25°C; Model RHP3 ±3% 20-80% RH @
25°C.
Thermistor Temperature Sensor:
±0.4°F @ 77°F (±0.22°C @ 25°C).
RTD Temperature Sensor:
DIN Class B; ±0.54°F @ 32°F (±0.3°C @ 0°C).
Solid State Temperature Sensor:
±0.9°F @ 72°F (±0.3°C @ 25°C).
Hysteresis:
±1%.
Repeatability:
±0.1% typical.
Temperature Limits:
-40 to 140°F (-40 to 60°C).
Storage Temperature:
-40 to 176°F (-40 to 80°C).
Compensated Temperature Range:
-4 to 140°F (-20 to 60°C).
4-20 mA Loop Powered Models:
Power Requirements:
10-35 VDC.
Output Signal:
4-20 mA, 2 channels for humidity/solid state temperature sensor
models (loop powered on RH). Switch selectable RH/dew point. Switch
selectable normal or reverse output.
0-5/10V Output Models:
Power Requirements:
15-35 VDC or 15-29 VAC.
Output Load:
5 mA max., 2 channels for humidity/solid state temperature
sensor models. Switch selectable 0-10V/2-10V or 0-5V/1-5V output. Switch
selectable RH/dew point. Switch selectable normal or reverse output.
Solid State Temperature Sensor Output Ranges:
Switch selectable,
-20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F
(4.4 to 32.3°C); -4 to 140°F (-20 to 60°C).
Response Time:
15 seconds.
Electrical Connections:
Screw terminal block.
Drift:
<1% RH/year.
RH Sensor:
Capacitance polymer.
Enclosure Material:
White polycarbonate.
Display:
Optional LCD, backlit on 0-5/10V models. Switch selectable %RH or dew
point, °F/°C.
Display Resolution:
RH: 1%; Temperature: 0.1°F (0.1°C); Dew Point: 1°F (1°C).
Weight:
0.3 lb (0.14 kg).
Agency Approvals:
CE.
1-3/16
[30.16]
1-3/16
[30.16]
.921
3x 3/8
[9.53]
35/64
[13.89]
1-13/32
[35.72]
1-53/64
[46.43]
4x 3/16
[4.76]
1-13/32
[50.01]
4-31/64
[113.9]
3-13/32
[86.52]
Shown with optional LCD display
Do not exceed ratings of this device, permanent damage not
covered by warranty may result. The 4-20 mA models are not
designed for AC voltage operation.
CAUTION
Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present.
CAUTION
Use electrostatic discharge precautions (e.g., use of wrist
straps) during installation and wiring to prevent equipment dam-
age.
CAUTION
Disconnect power supply before installation to prevent electrical
shock and equipment damage.
Make sure all connections are in accordance with the job wiring diagram and in
accordance with national and local electrical codes. Use copper conductors only.
WARNING
www.
.com
1.800.561.8187
