Omega Products HX85 Installation Manual
HX80 SERIES
OPERATORS MANUAL
January 2012
Rev. E
MADE IN
HX80 SERIES
QUICK STARTUP GUIDE – Page 1
STARTUP
WHEN USING PROBE ONLY:
1. Mount the Probe in position to measure the desired gas.
2. Connect Probe wiring by cutting off connector or using a mating
connector, as shown below:
ITEM RIBBON CABLE WIRE #
Power Supply – Pos. 7
Power Supply – Neg. 1 (blue tracer)
Output 1 – Pos. 2
Output 2 – Pos. 6
Output 3 – Pos. 8
Output Common 4
Serial Output – TX 5
Serial Output – RX 3
Notes: Connect only the Outputs desired. See drawing in the HTPB Manual for
further connection details.
Do not apply DC Power until all wiring is completed.
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HX80 SERIES
QUICK STARTUP GUIDE – Page 2
WHEN USING PROBE WITH ELECTRONICS UNIT:
1. Mount the Probe and Electronics Unit.
2. Connect cable from Probe to Electronics Unit
(if applicable).
3. Connect Power Supply to Electronics Unit.
4. Connect Analog Outputs of Electronics Unit.
5. Connect Digital Output of Electronics Unit.
6. Connect Alarm Relays of Electronics Unit.
7. Connect RS-232 Serial Port of Electronics Unit.
ITEM CONN. TERM.
Power Supply (+) J8 2
Power Supply (-) J8 1
Analog Out 1 (+) J9 1
Analog Out 1 (-) J9 2
Analog Out 2 (+) J9 3
Analog Out 2 (-) J9 4
Analog Out 3 (+) J9 5
Analog Out 3 (-) J9 6
Alarm Relay 1 J2 1
Alarm Relay 1 J2 2
Alarm Relay 2 J2 3
Alarm Relay 2 J2 4
RS-232 TX J6 2
RS-232 RX J6 3
RS-232 RTN J6 5
Notes:
Connect only the Outputs desired. See the HX80 Manual for details.
Do not apply DC Power until all wiring is completed.
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TABLE OF CONTENTS Page
1.0 Quick Startup 1
List of Illustrations 4
List of Tables 4
2.0 Introduction 5
2.1 General Description 5
2.2 Specifications Summary 6
2.3 Model Descriptions 7
2.4 Available Options 8
3.0 Installation 10
3.1 Mounting the Probe 10
3.2 Mounting the Electronics Unit 11
3.3 Electrical Wiring 11
3.3.1 Probe Only 11
3.3.2 Probe with Electronics 13
4.0 Basic Block Diagram 16
4.1 Probe Assembly 16
4.2 Electronics Module 17
4.3 Complete System 17
5.0 Operation 19
5.1 Initial Bench Testing 19
5.2 Normal Operation 19
5.3 Factory Default Conditions 19
5.4 RS-232 Serial Port 21
5.4.1 Serial Port Setup 21
5.4.2 Changing the Digital Display 21
5.4.3 Changing the Output Ranges 22
5.4.4 Programming the Alarm Relays 23
5.4.5 Calibrating the Analog Outputs 24
6.0 Maintenance 25
6.1 Sensor Circuit Board 25
6.1.1 Replacing the Sensor Board 25
6.1.2 Removing Components 25
6.1.3 Sensor Reassembly 26
7.0 Specifications 27
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LIST OF ILLUSTRATIONS Page
2-1 Some HX80 Configurations 5
3-1 System with Sample Cell 10
3-2 Installing the Mounting Lugs 11
3-3 Probe Wiring, Ribbon Cable 12
3-3a Probe Wiring 13
3-4 Electronics Unit Wiring 15
4-1 Probe Block Diagram 16
4-2 System Block Diagram 18
6-1 Removing Retaining Ring 25
6-2 Sensor Exploded View 26
LIST OF TABLES Page
2-1 Standard Configurations 7
2-2 Measurement Ranges 8
3-1 Probe Wiring, Ribbon Cable 12
3-1a Probe Wiring 13
3-2 Electronics Wiring 14
3-3 Serial Port Wiring 14
5-1 Standard Output Scaling 20
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2.0 INTRODUCTION
2.1 GENERAL DESCRIPTION
The HX80 Series is a family of humidity probes and electronic modules that offer a
variety of measurement parameters with high accuracy. In addition to Percent Relative
Humidity (%RH), probes are available to also measure Temperature and Pressure.
Electrical analog and digital outputs are provided for not only these measured
parameters, but may be provided for microprocessor- computed parameters as well.
These include parts-per-million by volume (ppmv), parts-per-million by weight (ppmw),
grains of water per pound of dry gas (gr/lb), and others.
The HX80 system is designed for ease of installation and operation. Field-replaceable
sensor modules have standardized outputs for interchangeability without recalibration.
The power requirement is a common unregulated DC power supply. User-available
electrical outputs include linear analog voltage (or optional current), a digital bidirectional serial port, and alarm relays. Mounting options include Wall Mount, Remote
Mount, and Duct Mount configurations. Additional options include high temperature and
high pressure probes. A remote or local Display Unit (Type DIS) is available, with a
two-line LCD display, alarm relays, and three 4 to 20 mA electrical outputs.
Figure 3-1 Some of the Available HX80 Configurations
a. Stand-alone Probe
b. Remote Mount with Display
Option
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2.2 SPECIFICATIONS SUMMARY
(See Specifications for additional information)
2.2.1 STAND-ALONE PROBE
Analog Outputs: 0 – 10 Vdc (X3)
Digital Output: RS-232C
Power Supply: 18 to 30 Vdc, unregulated, 50 mA max.
RH Accuracy: +/- 1% nominal
Temp. Accuracy: +/- 0.5°C
Mounting: Cable Length: 6 feet
Fitting: ¾ inch stainless steel
NPT thermocouple fitting
Dimensions: Length: 8 inches
Diameter: ¾ inch
Materials: Housing: Stainless Steel
Filter: Sintered Stainless Steel (removable)
2.2.2 PROBE WITH ELECTRONICS UNIT
Analog Outputs: 4 to 20 mA (X3)
Digital Output: RS-232C, bi-directional
Alarm Relays: Form A (SPST, NO) X2
Power Supply: 18 to 30 Vdc unregulated, 50 mA max.
RH Accuracy: +/- 1% nominal
Temp. Accuracy: +/- 0.5°C
Electronics Housing Protection:
IP66 (NEMA 4X) Dust tight and moisture resistant
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Table 2-1 HX80 Series, Standard Available Configurations
MODEL NO.
HX85 X
HXB85 X
HXP85 X
HX86 X
HXB86 X
HXP86 X
HX86N x
HX85A x
HX85BA x
HX85PA x
HX86A x
HX86BA x
HX86PA x
SENSOR ONLY
SENSOR WITH
ELECTRONICS MODULE
2.3 HX80 SERIES MODEL DESCRIPTIONS
HX85 – A Humidity/Temperature probe providing RH, Dew Point, and Temperature
outputs.
HXB85 – A Humidity/Temperature/Barometric Pressure probe providing RH,
Temperature, and Pressure outputs.
HXP85 – A Humidity/Temperature/High Pressure probe providing RH, Temperature,
and Pressure outputs.
HX86 – A Humidity/ High Temperature probe providing RH, Temperature, and Dew
Point outputs, with remote Electronics Unit including Digital Display.
HXB86 – A Humidity/High Temperature/Barometric Pressure probe providing RH,
Temperature, and Pressure outputs, with remote Electronics Unit including Digital
Display.
HXP86 – A Humidity/High Temperature/High Pressure probe providing RH,
Temperature, and Pressure outputs, with remote Electronics Unit including Digital
Display.
HX86N – Identical to HX86, with Remote Electronics Unit, but with no Digital Display.
HX85A – A Humidity/Temperature probe providing RH, Dew Point, and Temperature
outputs with an operating temperature up to 120C.
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HX85BA – A Humidity/Temperature/Ba rometric Pressure probe providing RH,
Temperature, and Pressure outputs with an operating temperature up to 120C.
HX85PA – A Humidity/Temperature/High Pressure probe providing RH, Temperature,
and Pressure outputs with an operating temperature up to 120C.
HX86A – A Humidity/ High Temperature probe providing RH, Temperature, and Dew
Point outputs, with remote Electronics Unit including Digital Display with an operating
temperature up to 120C.
HX86BA – A Humidity/High Temperature/Barometric Pressure probe providing RH,
Temperature, and Pressure outputs, with remote Electronics Unit including Digital
Display with an operating temperature up to 120C.
HX86PA – A Humidity/High Temperature/High Pressure probe providing RH,
Temperature, and Pressure outputs, with remote Electronics Unit including Digital
Display with an operating temperature up to 120C
2.4 AVAILABLE OPTIONS
HX80-DIS – Remote electronics module with two-line LCD digital display, three 4 to 20
mA analog outputs, RS-232C, and two programmable alarm relays. This unit can be
added to existing Probes in the field.
HX80-NDIS – Similar to HX80-DIS but without Digital Display
HX80- SENSOR – Field-replaceable sensor module for RH/Temperature.
Interchangeability accurate to published specification.
HXP80-SENSOR – Field-replaceable sensor module for RH/Temperature/Pressure.
Interchangeability accurate to published specification.
HXB80-SENSOR – Field-replaceable sensor module for RH/Temperature/Barometric
Pressure. Interchangeability accurate to published specification.
HX80-CHAMBER – Sample chamber with inlet and outlet fittings.
Table 2-2 HX80 Series Sensor Actual Measurement Ranges.
MODEL NO. OUTPUT 1 OUTPUT 2 OUTPUT 3
HX85
MEASUREMENT RANGE 5 to 95% -20 to +70ºC -60 to +30ºC
HXB85
PERCENT RH AIR TEMP. DEW POINT
PERCENT RH AIR TEMP. BAR. PRESSURE
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