Dwyer Instruments RHP-2WXB, RHP-2WXD, RHP-2WXC, RHP-2WXF, RHP-2WX0 Specifications-installation And Operating Instructions

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hown with optional LCD display

S

Bulletin H-RHP-W

Series RHP-W Wall Mount Humidity/Temperature/Dew Point Transmitter

Specifications - Installation and Operating Instructions

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

ptional LCD display can be integral to the transmitter or a remote display can be

o

rdered for building balancing or LEED validation. The LCD display indicates the

o

mbient temperature along with the humidity or dew point. The transmitter has

a
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 tempera­ture 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

WARNING

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.

CAUTION

age.

CAUTION

CAUTION

designed for AC voltage operation.

Disconnect power supply before installation to prevent electrical
shock and equipment damage.

Use electrostatic discharge precautions (e.g., use of wrist
straps) during installation and wiring to prevent equipment dam-

Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present.

Do not exceed ratings of this device, permanent damage not
covered by warranty may result. The 4-20 mA models are not

PECIFICATIONS

S
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.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. Box 373 • Michigan City, IN 46360-0373, U.S.A. Fax: [phone] e-mail: [e-mail]

www. .com

[e-mail]1.800.561.8187

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

POWER
SUPPLY

POWER
SUPPLY

+ -+ -

RH RECEIVERRH RECEIVER

++

--

TEMP RECEIVERTEMP RECEIVER

PASSIVE TEMP.
SENSOR

PASSIVE TEMP.
SENSOR

(IF PRESENT)(IF PRESENT)

(IF PRESENT)(IF PRESENT)

++

--

4-20MA4-20MA

4-20MA4-20MA

B

OTTOM TAB

H

INGE

TO REMOVE COVER
APPLY PRESSURE TO
BOTTOM TAB WHERE
INDICATED AND THE
TWO PARTS
WILL BECOME
UNHINGED AT TOP

REVERSE PROCESS
TO APPLY COVER

MOUNTING
BACK PLATE

S

ELF-LATCHING

C

OVER

M

OUNTING

S

CREWS

igure 1

F

. Push tab on bottom of cover and lift cover from back plate. (See Figure 1).

1

2. Select the mounting location, away from diffusers, lights, or any external
influences.

3. Mount transmitter on a vertical surface to a standard electrical box using the two
#6 M2C type screws provided.

. Pull wires through sub base hole and make necessary connections.

4

. Reattach cover to base plate.

5

Wiring

Use maximum 18 AWG wire for wiring to terminals. Refer to figures 2 through 5 for
wiring information.

Current Output Models (RHP-XW1X)

Current output models must be powered with 10-35 VDC supply voltage. Wire the
RH current output as shown in Figure 2. If the unit has a 4-20 mA temperature out­put, wire the temperature receiver between terminal 3 and the negative terminal of

he power supply. If the unit has a passive temperature sensor, wire to terminals 4

t

nd 5. If the RH output is not required, wire the negative terminal of the power sup-

a
ply to terminal 1 of the transmitter. If the temperature output is not used, it may be
left disconnected.

odels with Selectable Current or Voltage Outputs (RHP-XW44)

M

hese models may be wired for current or voltage output. Note that both outputs

T

ust be wired either for current or voltage. It is not possible to wire one output for

m

urrent, and the other for voltage.

c

Prior to wiring, verify that the Current/Voltage select switch is set to current or volt­age as desired. Refer to “Setting the Current/Voltage Select Switch”.

urrent Output Selected: Wire as shown in Figure 4. Current outputs must be

C

owered with 10-35 VDC. If the RH output is not required, wire the negative termi-

p

al of the power supply to terminal 1 of the transmitter. All units come with 4-20 mA

n
RH and Temperature outputs. If the 4-20 mA temperature output is not used it
maybe left disconnected. If the unit has a passive temperature sensor, wire to ter­minals 7 and 8.

igure 4

F

oltage Output Selected: Voltage outputs may be powered with 15-35 VDC or 15-

V

29 VAC. Note polarity when using DC power. Wire the RH voltage output as shown
in Figure 5. If the unit has a voltage temperature output, wire the temperature
receiver between terminal 6 and the negative terminal of the power supply. All units
come with RH and Temperature voltage outputs. If the temperature or RH voltage
output is not used it may be left disconnected. If the unit has a passive temperature
sensor, wire to terminals 7 and 8.

Figure 2

Voltage Output Models (RHP-XW2X)

Wire as shown in Figure 3. Voltage outputs may be powered with 15-35 VDC or 15­29 VAC. Note polarity when using DC power. If the unit has a voltage temperature
output, wire the temperature receiver between terminal 4 and negative terminal of
power supply. If the unit has a passive temperature sensor, wire to terminals 5 and

6. For units with RH and temperature voltage outputs, the RH or Temperature out-

put may be used by itself.

Figure 3

Setting the Current/Voltage Select Switch

Remove the cover of the unit as shown in Figure 1. The Current/Voltage select
switch is located on the back of the circuit board. Set the switch “IOUT” for current,
“VOUT” for voltage.

www. .com

Figure 5

Figure 6

[e-mail]1.800.561.8187