Greystone RH200A Installation Instructions Manual

RH200A RH Transmitter

Installation Instructions

Introduction

This humidity transmitter uses a highly accurate and reliable Thermoset
Polymer based capacitance humidity sensor and state-of-the-art digital
linearization and temperature compensated circuitry to monitor
humidity levels in a duct. The humidity sensor is encapsulated in a 60
micron HDPE lter at the end of a 230 mm (9”) S/S probe and a compact
enclosure. An optional temperature sensor is available.

Before Installation

Read these instructions carefully before installing and commissioning
the RH transmitter. Failure to follow these instructions may result in
product damage. Do not use in an explosive or hazardous environment,
with combustible or ammable gases, as a safety or emergency stop
device or in any other application where failure of the product could
result in personal injury. Take electrostatic discharge precautions

during installation and do not exceed the device ratings.

Mounting

The tranmitter installs directly into any air duct with a minimum width/diameter of 25.5 cm (10”). Select a suitable installation
area in the middle of the duct wall. To achieve the best reading, do not place in an area where air stratication may be
present. Mount the sensor at least 1.5 m (5 ‘ ) in either direction from elbows, dampers, lters or other duct restric-

tions. Avoid areas where the transmitter is exposed to vibrations or rapid temperature changes.

Once a suitable spot is selected, drill a 15 -20 mm (0.6” - .75“ ) hole for the probe.

Slide the probe in the drilled hole until the enclosure is ush against the duct. The airow direction is not important. Secure
the enclosure to the duct with (2) #10 x 1” (25 mm) self tapping screws (Not provided). Tighten screws until the enclosure is
tight against the duct and that there is no movement of the enclosure as shown in Figure 1.

A foam gasket is provided on the back of the enclosure that provides a
tight seal against any air leaks.

Using a Phillips screwdriver, remove the (2) screws, as shown in Figure 2.
Remove cover and set aside with screws for re-installing after wiring
and set up.

Two 21 mm (0.8125”) holes are provided for connection of either

12.77mm (0.5” ) EMT or a cable gland style connector as shown in Figure 3.
Insert the EMT or cable gland connector through the hole and securely
fasten using a locknut. If only one connection hole is required, use the
included hole cap to cap o the unused one as shown in Figure 4.

Special care must be taken not to damage any internal components
during installation.

Make wire connections as per the “Wiring” illustrations on Page 2.

Once wiring and set up are complete, re-install cover and tighten the (2)
screws using a Phillips screwdriver.

Figure 2 Figure 4Figure 3

Figure 1

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EMT/Cable Gland Connection Holes

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EMT Connector

Connection Hole Cap

Wiring

• Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical shock or equipment
damage.

• Use 14-22 AWG shielded wiring for all connections and do not locate the device wires in the same conduit with wiring used
to supply inductive loads such as motors. Make all connections in accordance with national and local codes.

• Pull at least six inches of wire into the enclosure, then complete the wiring connection according to the wire diagram for the
applicable power supply and output signal type.

• Select desired signal output type (mA or Vdc) by placing the output switch in required position, as shown in Figure 5.
Factory default is mA (4-20 mA).

• If mA was selected, no further Output set up is required. If VOLT output is selected in Figure 5, place Voltage Output Jumper
to desired span position, as shown in Figure 6. ie: 10 = 0-10 Vdc. Factory default is 10v = 0-10Vdc.

• Connect the DC positive or the AC voltage hot side to the PWR terminal. For voltage output or AC power, the supply
Common is connected to the COM terminal. The device is reverse voltage protected and will not operate if connected
backwards. It has a half-wave power supply so the supply Common is the same as the signal Common. See Figure 7.

•The analog output is available on the OUT terminal. Check the controller Analog Input to determine the proper
connection before applying power as shown in Figure 7.

• If installed, the resistance temperature output is available on the two terminals labelled TEMPERATURE SENSORas shown in
See Figure 8.

Figure 5

Output Type

Selection Switch

mA = 4-20 mA

(Factory Default)

VOLT = Vdc

Figure 8

Optional Temperature Sensor

Specication:

Sensor Type:...................Thermoset Polymer based Capactive

Range:..............................0 to 100% RH

Accuracy:........................±2, 3, or 5% RH (5 to 95% RH)

Response:.......................15 Seconds typical

Temp Dependence:....±0.05% RH/ ˚C

Hysteresis:......................±1.5% RH maximum

Repeatability:...............±0.5% RH typical

Linearity:........................±0.5% RH typical

Operating Range:........-40 to 85˚C (-40 to 185˚F)

Power Supply:...............18 to 30 Vdc, 15 to 26 Vac

Consumption:...............22 mA maximum

Protection Circuitry:...Reverse voltage protected and output
limited

Output Signal:..............4-20 mA current loop, 0-5 or 0-10 Vdc

(selectable)
Output Drive @ 24 Vdc:..550 ohms max for current output
10K ohms min for voltage output
Internal Adjustments:.Clearly marked ZERO and SPAN pots

Optional Temp.:............RTD’s or Thermistors. 2 Wire

Probe:..............................230 mm (9”) probe length x 12.7 mm (1/2”)

diameter stainless steel with 60 micron HDPE
porous lter

Enclosure:......................ABS - UL94-5VB - IP61 (NEMA 2)

*In order to maintain the published NEMA/IP
ratings, properly rated conduit or cable gland
adapters must be used.

Termination:.................Screw terminal block (14 to 22 AWG)

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Figure 6

Voltage

Output

Selection

* No setting required if output selection switch is set to mA in Figure 5

0-10 Vdc
(Factory

default)

Figure 7

Wiring for voltage output signal
and 24 Vdc power from controller

Wiring for all output signals and
external 24 Vac power transformer

Dimensions:

53.6 mm

2.110 “

115.8 mm

4.56 “

0-5 Vdc

Wiring for 4-20 mA loop-powered
output and external 24 Vdc power
from controller

Wiring for 4-20 mA loop-powered
output and external 24 Vdc external
power supply

24 Vdc Power Supply

84.3 mm

3.320 “

2X Ø 0.850”

304 Series S/S Probe

60 micron HDPE lter

12.70 mm

0.50“

228.60 mm
9”

V. RH200A 10/14

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