Bulletin H-RHP-W

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

®

Specifications - Installation and Operating Instructions

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Shown with optional LCD display

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

the most versatile room transmitter on the market. The stylish housing is well vented Relative Humidity Range: 0-100% RH.
to provide air flow across the sensor to improve measurement accuracy. An optional Temperature Range: -40 to 140°F (-40 to 60°C) for thermistor and RTD sensors.
LCD display can be integral to the transmitter or a remote display can be ordered -20 to 140°F (-28.9 to 60°C) for solid state temperature sensors.
for building balancing or LEED validation. The LCD display indicates the ambient Dew Point Temperature Range: -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8
temperature along with the humidity or dew point. The transmitter has internal dip to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C) field selectable
switches to select the temperature engineering units and whether the transmitter ranges.
outputs humidity or dew point. Accuracy: RH: Model RHP2 ±2% 10-90% RH @ 25°C; Model RHP3 ±3% 20-80%
The humidity and the dew point are measured using a capacitive polymer sensor RH @ 25°C. Thermistor Temperature Sensor: ±0.4°F @ 77°F (±0.22°C @ 25°C).
that completely recovers from 100% saturation. The humidity and dew point can RTD Temperature Sensor: DIN Class B; ±0.54°F @ 32°F (±0.3°C @ 0°C). Solid
have either a current or voltage output, while the optional temperature output can State Temperature Sensor: ±0.9°F @ 72°F (±0.3°C @ 25°C).
be a current, voltage, RTD or thermistor. For models with current or voltage for the Hysteresis: ±1%.
temperature output, the temperature range is field selectable. Repeatability: ±0.1% typical.
Temperature Limits: -40 to 140°F (-40 to 60°C).
INSTALLATION 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.
CAUTION Disconnect power supply before installation or maintenance.
4-20 mA Loop Powered Outputs: Power Requirements: 10-35 VDC. Output
Failure to do so may result in equipment damage.
Signal: 4-20 mA, 2 channels for humidity/solid state temperature sensor models
Make sure all connections are in accordance with the job wiring diagram and in
(loop powered on RH). Switch selectable RH/dew point. Switch selectable normal or
accordance with national and local electrical codes. Use copper conductors only.
reverse output.
0-5/10 V Output Models: Power Requirements: 15-35 VDC or 15-29 VAC. Output
NOTICE Use electrostatic discharge precautions (e.g., use of wrist straps)
Load: 5 mA max., 2 channels for humidity/solid state temperature sensor models.
during installation and maintenance to prevent equipment damage.
Switch selectable 0-10 V/2-10 V or 0-5 V/1-5 V output. Switch selectable RH/dew
The sensor is particularly sensitive to electric shock.
point. Switch selectable normal or reverse output.
NOTICE Avoid locations where severe shock or vibration, excessive Solid State Temperature Sensor Output Ranges: Switch selectable, -20 to
moisture, or corrosive fumes are present. 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).
Do not exceed ratings of this device; permanent damage not Response Time: 15 seconds.
NOTICE
covered by warranty may result. The 4-20 mA models are not Electrical Connections: Screw terminal block.
designed for AC voltage operation. Drift: <1% RH/year.
RH Sensor: Capacitance polymer.
Enclosure Material: White polycarbonate.
Display: Optional LCD, backlit on 0-5/10 V 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: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com
 HINGE Models with Selectable Current or Voltage Outputs (RHP-XW44)
TO REMOVE COVER These models may be wired for current or voltage output. Note that both outputs must
APPLY PRESSURE TO be wired either for current or voltage. It is not possible to wire one output for current,
BOTTOM TAB WHERE MOUNTING and the other for voltage.
INDICATED AND THE MOUNTING BACK PLATE
TWO PARTS SCREWS
WILL BECOME Prior to wiring, verify that the Current/Voltage select switch is set to current or voltage
UNHINGED AT TOP as desired. Refer to “Setting the Current/Voltage Select Switch”.
REVERSE PROCESS
TO APPLY COVER Current Output Selected: Wire as shown in Figure 4. Current outputs must be
powered with 10-35 VDC. If the RH output is not required, wire the negative terminal
of the power supply to terminal 1 of the transmitter. All units come with 4-20 mA RH
BOTTOM TAB 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.
SELF-LATCHING
COVER
POWER
Figure 1 SUPPLY
- +
1. Push tab on bottom of cover and lift cover from back plate. (See Figure 1).
2. Select the mounting location, away from diffusers, lights, or any external influences.
RH RECEIVER - - TEMP RECEIVER
3. Mount transmitter on a vertical surface to a standard electrical box using the two #6 4-20 MA + 4-20 MA
+
M2C type screws provided.
4. Pull wires through sub base hole and make necessary connections. PASSIVE TEMP.
5. Reattach cover to base plate. SENSOR
(IF PRESENT)
Wiring
1 2 3 4 5 67 8
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 the power Figure 4
supply. If the unit has a passive temperature sensor, wire to terminals 4 and 5. If the Voltage Output Selected: Voltage outputs may be powered with 15-35 VDC or 15-29
RH output is not required, wire the negative terminal of the power supply to terminal VAC. Note polarity when using DC power. Wire the RH voltage output as shown in
1 of the transmitter. If the temperature output is not used, it may be left disconnected. 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
POWER RH and Temperature voltage outputs. If the temperature or RH voltage output is not
SUPPLY
- + used it may be left disconnected. If the unit has a passive temperature sensor, wire to
terminals 7 and 8.
RH RECEIVER - - TEMP RECEIVER
4-20 MA 4-20 MA POWER
+ + (IF PRESENT) SUPPLY
+ -
PASSIVE TEMP
SENSOR RH RECEIVER - - TEMP RECEIVER
(IF PRESENT) 0-5 V OR 0-10 V + + 0-5 V OR 0-10 V
1 2 3 4 5 6 7 8
PASSIVE TEMP
SENSOR
(IF PRESENT)

1 2 34 5 6 7 8

Figure 2
Voltage Output Models (RHP-XW2X)
Wire as shown in Figure 3. Voltage outputs may be powered with 15-35 VDC or 15-
29 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 Figure 5
power supply. If the unit has a passive temperature sensor, wire to terminals 5 and Setting the Current/Voltage Select Switch
6. For units with RH and temperature voltage outputs, the RH or Temperature output Remove the cover of the unit as shown in Figure 1. The Current/Voltage select switch
may be used by itself. is located on the back of the circuit board. Set the switch “IOUT” for current, “VOUT”
for voltage.
POWER
SUPPLY
- +
- RH RECEIVER
+ 0-5 OR 0-10 V

- TEMP RECEIVER
+ 0-5 OR 0-10 V
(IF PRESENT)

PASSIVE TEMP.
SENSOR
(IF PRESENT)

1 2 3 4 56 78

CURRENT VOLTAGE SELECT SWITCH

Figure 3 Figure 6
DIP SWITCH SETTINGS TROUBLESHOOTING
To access the DIP SWITCH, remove the cover of the unit as shown in Figure 1. The Verify that the unit is mounted in the correct position.
DIP SWITCH is located on the back of the circuit board.
4-20 mA Models:
Verify appropriate supply voltage. The transmitter requires a minimum of 10 and a
maximum of 35 VDC at its connection for proper operation. Choose a power supply
with a voltage and current rating which meets this requirement under all operating
conditions. If the power supply is unregulated, make sure voltage remains within these
limits under all power line conditions. Ripple on the supply should not exceed 100 mV.

Loop Resistance – The maximum allowable loop resistance depends on the power
supply voltage. Maximum loop voltage drop must not reduce the transmitter voltage
Figure 7 below the 10 VDC minimum. Maximum loop resistance can be calculated with the
following equation. Vps is the power supply voltage.
ALL DIP SWITCHES are factory set to “ON”
Vps-10.0
5V/10V Output Select (Applies only to Voltage Output units) Rmax =
20 mA
DIP SWITCH#1 OFF: Output = 0-5 V
DIP SWITCH#1 ON: Output = 0-10 V
Some receivers, particularly loop powered indicators, may maintain a fixed loop
Zero Suppression (Applies only to Voltage Output Units) voltage to power the device. This voltage drop must also be subtracted from the power
DIP SWITCH#2 OFF : Output range = 1-5 V or 2-10 V, depending on output range supply voltage when calculating the voltage margin for the transmitter. The following
DIP SWITCH#2 ON : Output range = 0-5 V or 0-10 V, depending on output range equation takes this into account. Vrec is the receiver fixed voltage.

Upper Display reads RH or DEW POINT

Vps-10.0-Vrec
DIP SWITCH#3 OFF: Upper Display reads Dew Point Rmax =
20 mA
DIP SWITCH#3 ON: Upper Display reads RH

RH OUTPUT, Normal or Invert 0-10 V Output Models:

DIP SWITCH#4 OFF: Output is inverted Verify appropriate supply voltage. The 0-10 V output models require a DC supply of
DIP SWITCH#4 ON: Output is Normal 15-35 V or an AC supply of 15-29 V for proper operation maximum. Maximum output
load is 5 mA.
When set to normal output, the output increases as the RH increases. When set to
inverted output, the output decreases as the RH increases. Remote Display
Example: Normal 4-20 mA output, 0%RH = 4 mA, 100% RH = 20 mA For models that are ordered without an integral LCD display, remote display Model
Inverted 4-20 mA output, 0%RH = 20 mA, 100% RH = 4 mA A-449 can be used to display the temperature and humidity or dew point. The mini
USB plug of the remote display plugs into the receptor on the side of the housing.
TEMP OUTPUT, Normal or Invert After a short warm up time, the display will begin to show the current temperature and
DIP SWITCH#5 OFF: Output is inverted humidity or dew point measurements. Humidity or dew point can be selected via the
DIP SWITCH#5 ON: Output is Normal internal dip switches as described earlier in this manual.

When set to normal output, the output increases as the temperature increases. When
set to inverted output, the output decreases as the temperature increases.
Example: Normal 4-20 mA output, -20°F = 4 mA, +140°F = 20 mA
Inverted 4-20 mA output, -20°F = 20 mA, +140°F = 4 mA

°F/°C Select
DIP SWITCH#6 OFF: °C
DIP SWITCH#6 ON: °F

Temperature Output Range Select

Range Dip Switch 7 Dip Switch 8

-4 to +140°F (-20 to +60°C) OFF OFF
+40 to +90°F (+4.4 to +32.2°C) OFF ON
0 to +100°F (-17.8 to +37.8°C) ON OFF
-20 to +140°F (-28.9 to +60°C) ON ON

The temperature range applies only to the current or voltage output. If the unit has
a display, it will display temperature from -40 to +140°F (-40 to +60°C). If the unit is
set to read DEW POINT, the output range of the DEW POINT will be the same as the
Temperature Output Range.

Note: The display will indicate temperature even if the unit does not have a temperature
output.
MAINTENANCE RESISTANCE VS TEMPERATURE TABLE
Upon final installation of the Series RHP-W Temperature/Humidity/Dew Point Temperature Resistance Curves (in Ohms)
Transmitter and the companion receiver, no routine maintenance is required. A °C °F A B C D E F
periodic check of the system calibration is recommended. T­­­he Series RHP-W is not
-55 -67.0 607800.00 963849.00 289154.70 78.32 783.2 2394000.00
field serviceable and should be returned if repair is needed (field repair should not
-50 -58.0 441200.00 670166.00 201049.80 80.31 803.1 1646200.00
be attempted and may void warranty). Be sure to include a brief description of the
-45 -49.0 323600.00 471985.00 141595.50 82.29 822.9 1145800.00
problem plus any relevant application notes. Contact customer service to receive a
-40 -40.0 239700.00 336479.00 100943.70 84.27 842.7 806800.00
return goods authorization number before shipping.
-35 -31.0 179200.00 242681.00 72804.30 86.25 862.5 574400.00
This symbol indicates waste electrical products should not be disposed -30 -22.0 135200.00 176974.00 53092.20 88.22 882.2 413400.00
of with household waste. Please recycle where facilities exist. Check with -25 -13.0 102900.00 130421.00 39126.30 90.19 901.9 300400.00
your Local Authority or retailer for recycling advice. -20 -4.0 78910.00 97081.00 29.124.30 92.16 921.6 220600.00
-15 5.0 61020.00 72957.00 21887.10 94.12 941.2 163.500.00
-10 14.0 47540.00 55329.00 16598.70 96.09 960.9 122280.00
MODEL CHART -5 23.0 37310.00 42327.00 12698.10 98.04 980.4 92240.00
Example RHP 2 D 1 A LCD RHP-2D1A-LCD 0 32.0 29490.00 32650.00 9795.00 100.00 1000.0 70160.00
Series RHP RH/passive temperature sensor 5 41.0 23460.00 25392.00 7617.60 101.95 1019.5 53780.00
transmitter 10 50.0 18780.00 19901.00 5970.30 103.90 1039.0 41560.00
Accuracy 2 2% accuracy 15 59.0 15130.00 15712.00 4713.60 105.85 1058.5 32340.00
3 3% accuracy 20 68.0 12260.00 12493.00 3747.90 107.79 1077.9 25360.00
Housing Type W Wall mount 25 77.0 10000.00 10000.00 3000.00 109.74 1097.4 20000.00
RH Output 1 4-20 mA 30 86.0 8194.00 8057.00 2417.10 111.67 1116.7 15892.00
2 0-10 V/0-5 V 35 95.0 6752.00 6531.00 1959.30 113.61 1136.1 12704.00
4 0-10 V/0-5 V/4-20 mA 40 104.0 5592.00 5326.00 1597.80 115.54 1155.4 10216.00
Temperature A 10K @ 25°C thermistor Dwyer curve A 45 113.0 4655.00 4368.00 1310.40 117.47 1174.7 8264.00
Sensor/ B 10K @ 25°C thermistor Dwyer curve B 50 122.0 3893.00 3602.00 1080.60 119.40 1194.0 6722.00
Output C 3K @ 25°C thermistor Dwyer curve C 55 131.0 3271.00 2986.00 895.80 121.32 1213.2 5498.00
D 100Ω RTD DIN 385 60 140.0 2760.00 2488.00 746.40 123.24 1232.4 4520.00
E 1KΩ RTD DIN 385 65 149.0 2339.00 2083.00 624.90 125.16 1251.6 3734.00
F 20KC 25°C thermistor curve F 70 158.0 1990.00 1752.00 525.60 127.08 1270.8 3100.00
0 None 75 167.0 1700.00 1480.00 444.00 128.99 1289.9 2586.00
1 4-20 mA solid state sensor 80 176.0 1458.00 1255.00 376.50 130.90 1309.0 2166.00
2 0-10 V/0-5 V mA solid state sensor 85 185.0 1255.00 1070.00 321.00 132.80 1328.0 1822.60
4 0-10 V/0-5 V/4-20 mA sensor 90 194.0 1084.00 915.50 274.65 134.71 1347.1 1540.00
Option LCD LCD Display 95 203.0 939.30 786.60 235.98 136.61 1366.1 1306.40
Blank No Options 100 212.0 816.80 678.60 203.58 138.51 1385.1 1112.60
105 221.0 712.60 587.60 176.28 140.40 1404.0 951.00
110 230.0 623.60 510.60 153.18 142.29 1422.9 815.80
115 239.0 547.30 445.30 133.59 144.18 1441.8 702.20
120 248.0 481.80 389.60 116.88 146.07 1460.7 606.40
125 257.0 425.30 341.90 102.57 147.95 1479.5 525.60
130 266.0 376.40 301.00 90.30 149.83 1498.3 N/A
135 275.0 334.00 265.80 79.74 151.71 1517.1 N/A
140 284.0 297.20 235.30 70.59 153.58 1535.8 N/A
145 293.0 265.10 208.90 62.67 155.46 1554.6 N/A
150 302.0 237.00 186.10 55.83 157.33 1573.3 N/A

©Copyright 2019 Dwyer Instruments, Inc. Printed in U.S.A. 5/19 FR# 443752-00 Rev. 6

DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com