Omega Engineering HX92B Series User manual

HX92B SERIES
Relative Humidity Transmitters
TH-RP remote
probe with 3 m
(10') cable
and M12
connector
HX92B(*)-D duct mount
transmitter shown smaller
than actual size
HX92B wall mount shown
larger than actual size
TH-SP short
probe with M12
connector
Easy M12
Connection
TM
User’s Guide
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The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves
the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.
Patented: Covered by U.S. and International Patents and Patents Pending.
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C
ustomer Service: 1-800-622-2378 (USA & Canada only)
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Table of Contents
Section Page
1. General Description ................................................................................... 1-1
2. Unpacking ................................................................................................... 2-1
3. Theory of Operation and Electrical Connection .................................... 3-1
3.1.1 Theory Operation .............................................................................. 3-1
4. Mounting ..................................................................................................... 4-1
5. Relative Humidity Output Calculations ................................................ 5-1
6. Calibration ................................................................................................... 6-1
7. Maintenance ............................................................................................... 7-1
8. Specications .............................................................................................. 8-1
i
HX92B Relative Humidity Transmitters

HX92B Relative Humidity Transmitters
List of Figures
Figure Description Page
Figure 1-1 Transmitter Internal Diagram ...................................................... 1-1
Figure 3-1 Voltage Output Connection Diagram ........................................ 3-1
Figure 3-2 Current Output Connection Diagram ........................................ 3-2
Figure 4-1 Wall Mount Model Dimensions................................................... 4-1
Figure 4-2 Duct Mount Model Dimensions .................................................. 4-2
Figure 4-3 Remote Probe Model Dimensions ............................................... 4-2
Figure 7-1 Sensor Probe Replacement ........................................................... 7-1
ii

Section 1 - General Description
The OMEGA®HX92B Series Relative Humidity Transmitter provides a
linearized and temperature compensated output signal of 4 to 20mA, 0 to 1 Vdc,
0 to 5 Vdc or 0 to 10 Vdc depending upon the model selected. The output signals
have been calibrated and scaled 0 to 100% Relative Humidity output scale. The
digitalRelativeHumiditysensorisprotectedbyastainlesssteellterthatis
easily removed for cleaning. The NEMA rated polycarbonate enclosure and
cable entry connection provides weathertight protection. Screws are provided for
mounting via internal holes inside the enclosure. The terminal connection for the
output signal is as shown in Figure 1-1 below.
Figure 1-1. Transmitter Internal Diagram
Most of the models come with a replaceable sensor probe; the process of
replacing the sensor probe is very simple. See the “Maintenance” section for
details.
The models with a replaceable sensor probe are:
HX92BC, HX92BV0, HX92BV1, HX92BV2, HX92BC-RP1, HX92BV0-RP1,
HX92BV1-RP1, HX92BV2-RP1.
The models without a replaceable sensor probe are:
HX92BC- D, HX92BV0-D, HX92BV1-D, HX92BV2-D.
1-1
General Description 1
EXTERNAL CONNECTION
TERMINAL BLOCK
8-PIN M12
CONNECTOR
FOR DIGITAL
SENSOR PROBE
DIGITAL SENSOR CONNECTOR
1
5TB1
1
5
J2

2-1
Unpacking
2
Section - 2 Unpacking
Remove the packing list and verify that you have received all your equipment.
If you have any questions about the shipment, please call our Customer Service
Department at
1-800-622-2378 or 203-359-1660.
Onthewebyoucanndusat:www.omega.come-mail:[email protected]
When you receive the shipment, inspect the container and equipment for any
signs of damage. Note any evidence of rough handling in transit. Immediately
report any damage to the shipping agent.
The carrier will not honor any damage claims unless all shipping
material is saved for inspection. After examining and removing
contents, save packing material and carton in the event reshipment is
necessary.
The following items are supplied in the box with your HX92B Series transmitter.
• HX92BSeriesQuickstartManual,MQS-5339(1ea.)
• #6WallAnchorand#6MountingScrew(2ea.)
NOTE:

2-2
2.1 HX92B available models and functional description
Model number Description
HX92BC Wall Mount Relative Humidity Transmitter, 4 to 20mA.
HX92BV0 Wall Mount Relative Humidity Transmitter, 0 to 1 volt.
HX92BV1 Wall Mount Relative Humidity Transmitter, 0 to 5 volt.
HX92BV2 Wall Mount Relative Humidity Transmitter, 0 to 10 volt.
HX92BC-D Duct Mount Relative Humidity Transmitter, 4 to 20mA.
HX92BV0-D Duct Mount Relative Humidity Transmitter, 0 to 1 volt.
HX92BV1-D Duct Mount Relative Humidity Transmitter, 0 to 5 volt.
HX92BV2-D Duct Mount Relative Humidity Transmitter, 0 to 10 volt.
HX92BC-RP1 Remote Probe Relative Humidity Transmitter,
4 to 20mA Output with 3 m (10') cable.
HX92BV0-RP1 Remote Probe Relative Humidity Transmitter,
0 to 1 volt output with 3 m (10') cable.
HX92BV1-RP1 Remote Probe Relative Humidity Transmitter,
0 to 5 volt out put with 3 m (10') cable.
HX92BV2-RP1 Remote Probe Relative Humidity Transmitter,
0 to 10 volt output with 3 m (10') cable.
Accessories
Model number Description
TH-RP Field replaceable remote probe with 3 m (10') cable and M12 connector.
TH-SP Field replaceable 71.88 L mm (2.83") short probe with M12 connector.
HX92-CAL Calibration Kit and 75% relative humidity standards.
IND-KIT Spare duct mount kit for HX92(*), HX92B(*)-D or HX92B(*)-RP1
*For 4 to 20 mA output specify "C", for 0 to 1 Vdc output specify "V0", for 0 to 5 Vdc output
specify "V1", and for 0 to 10 Vdc output specify "V2".
Unpacking 2

Section 3 – Theory of Operation and Electrical Connection
3.1.1 Theory of Operation
A 4 to 20 mA loop is a series loop in which a transmitter will vary the current
owdependingontheinputtothetransmitter.IntheHX92Btheamountofthe
currentallowedtoowintheloopwillvarydependingontherelativehumidity
being measured by the sensor. Some advantages of a current output over a
voltage output is that the signal measured is less susceptible to electrical noise
interference, and the loop can support more than one measuring instrument as
long as the maximum loop resistance is not exceeded.
A typical application utilizing a current loop will normally consist of a power
supply, the transmitter and a meter, recorder or controller to measure the
currentow.ThemaximumallowableloopresistancefortheHX92Btofunction
properly is found by using the following formula:
Rmax = ((power supply voltage – 4) ÷ .02)
EXAMPLE: (When using a 30 Vdc power supply).
Rmax = ((30 – 4) ÷ .02) = 1,300 ohms max loop resistance
All electrical connections and wiring should be performed by a
suitably trained professional only.
Followtheelectricalconnectiondiagramshowningure3-1and3-2belowto
set up your Relative Humidity Transmitter.
Figure 3-1. Voltage Output Connection Diagram
3-1
Theory of Operation and Electrical Connection
3
POWER IN
R/H OUTPUT
GND
GND
CHASSIS
1
2
3
4
5
+
–
+
–
POWER SUPPLY
9-30 Vdc
(12-30 Vdc FOR
0-10 Vdc OUTPUT)
TB1
INTERNALLY CONNECTED
0-1 Vdc
0-5 Vdc
0-10 Vdc
CAUTION:

Figure 3-2. Current Output Connection Diagram
3-2
POWER IN
R/H OUTPUT
POWER SUPPLY
9 -30 Vdc MAX.
4 - 20 MA
GND NC
NC
TB1
+–
+–
GND
CHASSIS
1
2
3
4
5
Theory of Operation and Electrical Connection 3

4-1
Mounting
4
Section 4 - Mounting
The HX92B transmitters are designed for wall, duct or remote probe mounting
depending upon the model. Plastic wall anchors and mounting screws are
included with Wall Mount and Remote Probe models. A duct mounting kit is
included with Duct Mount models.
See Figure 4-1, Figure 4-2 and Figure 4-3 for the Wall Mount, Duct Mount and
Remote Probe model dimensions for your mounting reference.
Figure 4-1. Wall Mount Model Dimensions
52.8
(2.08)
37.8
(1.49)
Ø16.0
Ø(0.63)
65.0
(2.56)
65.0
(2.56)
50.0
(1.97)
MOUNTING HOLES
Ø0.18 Ø(4.6)
TYP. 2 PLACES
DIMENSIONS mm (in)