Page 1
Optional
Easy M12
Connection
HX92B wall mount shown
larger than actual size
User’s Guide
TH-SP short
probe with M12
connector
Shop online at
HX92B(*)-D duct mount
transmitter shown smaller
than actual size
omega.com
®
e-mail: [email protected]
For latest product manuals:
www.omegamanual.info
TH-RP remote
probe with 3 m
(10') cable
and M12
connector
HX92B SERIES
Relative Humidity Transmitters
Page 2
omega.com [email protected]
Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
Stamford, CT 06907-0047 USA
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660 Fax: (203) 359-7700
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide
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.
Page 3
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. Specications .............................................................................................. 8-1
HX92B Relative Humidity Transmitters
i
Page 4
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
Page 5
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
digitalRelativeHumiditysensorisprotectedbyastainlesssteellterthatis
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.
DIGITAL SENSOR CONNECTOR
8-PIN M12
CONNECTOR
FOR DIGITAL
SENSOR PROBE
General Description
1
J2
5
TB1
5
1
1
EXTERNAL CONNECTION
TERMINAL BLOCK
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
Page 6
2
Unpacking
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.
Onthewebyoucanndusat:www.omega.come-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.
NOTE:
• HX92BSeriesQuickstartManual,MQS-5339(1ea.)
• #6WallAnchorand#6MountingScrew(2ea.)
2-1
Page 7
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.
Unpacking
2
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".
2-2
Page 8
3
Theory of Operation and Electrical Connection
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
owdependingontheinputtothetransmitter.IntheHX92Btheamountofthe
currentallowedtoowintheloopwillvarydependingontherelativehumidity
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
currentow.ThemaximumallowableloopresistancefortheHX92Btofunction
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
CAUTION:
All electrical connections and wiring should be performed by a
suitably trained professional only.
Followtheelectricalconnectiondiagramshowningure3-1and3-2belowto
set up your Relative Humidity Transmitter.
TB1
POWER IN
1
R/H OUTPUT
2
GND
3
GND
4
CHASSIS
5
INTERNALLY CONNECTED
Figure 3-1. Voltage Output Connection Diagram
+
–
+
–
POWER SUPPLY
9-30 Vdc
(12-30 Vdc FOR
0-10 Vdc OUTPUT)
0-1 Vdc
0-5 Vdc
0-10 Vdc
3-1
Page 9
TB1
1
2
3
POWER IN
R/H OUTPUT
GND
+–
POWER SUPPLY
NC
9 -30 Vdc MAX.
Theory of Operation and Electrical Connection
+–
4 - 20 MA
3
GND
4
CHASSIS
5
NC
Figure 3-2. Current Output Connection Diagram
3-2
Page 10
4
Ø16.0
Mounting
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.
Ø(0.63)
65.0
(2.56)
MOUNTING HOLES
Ø0.18 Ø(4.6)
TYP. 2 PLACES
DIMENSIONS mm (in)
Figure 4-1. Wall Mount Model Dimensions
52.8
(2.08)
37.8
(1.49)
50.0
(1.97)
65.0
(2.56)
4-1
Page 11
50.0
(1.97)
65.0
(2.56)
20.6
(0.81)
34.8
(1.37)
15.8
(0.59)
Mounting
DIMENSIONS mm (in)
Ø16.0
Ø(0.63)
4
128.0
163.3
(6.43)
(5.04)
Figure 4-2. Duct Mount Model Dimensions
127.3
(5.01)
HX92B SERIES
RELATIVE HUMIDITY
TRANSMITTER
50
(1.97)
65
(2.56)
Ø17.3
Ø(0.68)
54.1
(2.13)
304.8 cm
(10')
DIMENSIONS mm (in)
Figure 4-3 Remote Probe Model Dimensions
4-2
Page 12
5
Relative Humidity Output Calculations
Section 5 - Relative Humidity Output Calculations
To calculate % relative humidity by measuring the current or voltage output, use
the following formulas:
For current output:
%RH = (Current measured in milliamps – 4) ÷ 0.16
Where:
4 = offset current in mA.
0.16 = full scale current limit in percent (%).
For voltage output
a. 1 volt output:
%RH = (voltage measured in volts x 100)
b. 5 volt output:
%RH = (voltage measured in volts/5) x 100
c. 10 volt output:
%RH = (voltage measured in volts/10) x 100
5-1
Page 13
RH Measured Vs Output Reading
Relative Humidity Output Calculations
5
% Relative
Output
Humidity
Current 0 to 1 Volt 0 to 5 Volt 0 to 10 Volt
(mA) (Vdc) (Vdc) (Vdc)
1 4.16 0.01 0.05 0.10
2 4.32 0.02 0.10 0.20
3 4.48 0.03 0.15 0.30
4 4.64 0.04 0.20 0.40
5 4.80 0.05 0.25 0.50
10 5.60 0.10 0.50 1.00
15 6.40 0.15 0.75 1.50
20 7.20 2.20 1.00 2.00
25 8.00 0.25 1.25 2.50
30 8.80 0.30 1.50 3.00
35 9.60 0.35 1.75 3.50
40 10.40 0.40 2.00 4.00
45 11.20 0.45 2.25 4.50
50 12.00 0.50 2.50 5.00
55 12.80 0.55 2.75 5.50
60 13.60 0.60 3.00 6.00
65 14.40 0.65 3.25 6.50
70 15.20 0.70 3.50 7.00
75 16.00 0.75 3.75 7.50
80 16.80 0.80 4.00 8.00
85 17.60 0.85 4.25 8.50
90 18.40 0.90 4.50 9.00
95 19.20 0.95 4.75 9.50
100 20.00 1.00 5.00 10.00
5-2
Page 14
6
Calibration
Section 6 - Calibration
Your transmitter has been digitally calibrated and tested to meet or exceed the
specicationsoutlinedinthismanualinourfactory.Thetransmittermustbe
sent back to the factory for any re-calibration request.
6-1
Page 15
Section 7 - Maintenance
The sensor probe can be replaced quickly for Wall Mount and Remote Probe
models.
Procedure to replace the sensor probe:
a. Loosen the securing nut, and pull the sensor probe out.
b. I nsert the new sensor probe to the M12 connector, and tighten the securing
nut to secure the connection.
SECURING NUT
Maintenance
REPLACEABLE
SENSOR PROBE
7
HX92B SERIES
RELATIVE HUMIDITY
TRANSMITTER
Figure 7-1 Sensor Probe Replacement
IfyourHX92Bwillbeusedinadustyenvironment,theprotectivesensorlter
(if clogged) may be removed for cleaning.
Unscrewtheprotectivecoverandgentlyblowcompressedairthroughthelter
screen. A soft brush may also be used to remove dirt particles from the screen.
If the sensor is subjected to 100% condensation, it must be dried to obtain correct
readings. There will be no permanent damage or calibration shift to the unit.
Units should not be exposed to high concentrations of ammonia or alcohol
vapors.
The Duct Mount model transmitter must be sent back to the factory if sensor
replacement or recalibration is needed.
7-1
Page 16
8
Specifications
Section 8 - Specifications
Measuring Range: 0 to 100%
Accuracy Range: ±2.5% from 20 to 80% RH, ±3.5% from 5 to 20%
and 80 to 95% RH; ±4% from 0 to 5% and 95 to
100% RH
Hysteresis:
Repeatability: ±0.1%
Resolution: 0.1%
Response Time: 8 Seconds typical
Sample Rate: 1 sample every 4 seconds.
Operating Temperature: -30 to 75°C
Input Power
4-20mA: 9 to 30 Vdc @ 50mV
0-1V: 9 to 30 Vdc @ 50mA
0-5V: 9 to 30 Vdc @ 50mA
0-10V: 12 to 30 Vdc @ 50mA
Max Loop Resistance: 200 Ohms @ 9 Vdc supply voltage
(4 to 20mA) 1,300 Ohms @ 30 Vdc supply voltage
Resistance:
Sensor Type:
±1%
Ohms = ((V supply – 4 V) / .02 A)
Max. Load (min. resistance)
1.25K for outputs: 0 – 1 Vdc, 0 – 5 Vdc
2.40K for 0 – 10 Vdc output
Digital Sensor
8-1
Enclosure Housing: Gray Polycarbonate, NEMA 13 (IP 54).
Connections: Nylon, Liquid-tight with neoprene gland for 2.29
to 6.73 m (0.09 to 0.265") diameter cable, internal 5
position terminal block accepts wire size from 14
to 22 gauge wire.
Dimensions:
Weight:
HX92B (*): 124 g (4.4 oz)
HX92B (*)-D: 132 g (4.7 oz)
HX92B (*)-RP1: 230 g (8.1 oz)
* 4 to 20 mA, 0 to 1 volt, 0 to 5 volts or 0 to 10 volts output. See page 2.2 for
model numbers.
See “Mounting” Section
Page 17
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for
any damages that result from the use of its products in accordance with information provided
by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/D ISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2014 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
FOR NON-WARRANTY REPAIRS,
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
consult OMEGA
Page 18
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
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