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Summary of Contents for Omega HX71 Series
- Page 1 User’s Guide RoHS 2 Compliant Shop online at omega.com e-mail: info@omega.com HX71-NB For latest product manuals: MODEL www.omegamanual.info HX71 MODEL HX71 SERIES RH Probe/Transmitter...
- Page 2 Tel: (203) 359-1660 Fax: (203) 359-7700 e-mail: info@omega.com 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.
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Page 3: Table Of Contents
HX71 SERIES TABLE OF RH Probe/Transmitter CONTENTS Section Page General Description ..............1 Unpacking ................... 1 Theory of Operation ..............2 Installation and Mounting ........... 3-4 Electrical Connections .............. 5 Wiring Examples ................ 6 Relative Humidity Output Calculations ........ 6 RH Measured Vs Output Reading Table ...... - Page 4 HX71 SERIES FIGURES RH Probe/Transmitter Figure Page Figure 1 Basic Transmitter Set-up With Current Loop Output ..........2 Figure 2 HX71 Dimensions ............3 Figure 3 HX71 Mounting ..............3 Figure 4 HX71-NB Dimensions and Mounting ......4 Figure 5 Current Transmitter Wiring Example (4-20 mA) ................
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Page 5: General Description
General Description 1. General Description The OMEGA HX71 Series Relative Humidity Transmitter’s provide ® a linearized and temperature compensated output signal of 4 to 20 mA, 0 to 1 Vdc or 0 to 5 Vdc depending upon the model selected. The output signal has been calibrated and scaled 0 to 100% for Relative Humidity. -
Page 6: Theory Of Operation
Theory of Operation 3. Theory of Operation A 4-20 mA loop is a series loop in which a transmitter will vary the current flow depending on the input to the transmitter. In the HX71 Series the amount of current allowed to flow in the loop will vary depending on the relative humidity or temperature being measured by the sensor(s). -
Page 7: Installation And Mounting
Installation and Mounting 4. Installation and Mounting NOTE Your HX71 Series RH Probe/Transmitter needs to be installed in applications that allow for well circulated air flow to meet the published specifications outlined here in this manual in Section 10. OMEGA’s HX71 transmitter’s are designed for either wall or duct Part mounting. -
Page 8: Figure 4 Hx71-Nb Dimensions And Mounting
Installation and Mounting 19.5 (0.76) 45.3 (1.78) MOUNTING HOLE 4.3 (0.17) DIA. 38 (1.50) 50 (1.97) 52.6 (2.07) MOUNTING 16 (0.62) DIA. HOLE 65 (2.56) 4.3 (0.17) DIA. DIMENSIONS: mm (in) Figure 4 - HX71-NB Dimensions and Mounting... -
Page 9: Electrical Connections
Wire: + Output White Bare Wire: Shield, Earth Ground CAUTION Your HX71 Series RH Probe/Transmitter has not been designed for, nor is it recommended for, use in medical or nuclear applications. Your HX71 Series RH Probe/Transmitter should never be installed in or... -
Page 10: Wiring Examples
HX71 SERIES RH Probe/Transmitter 6. Wiring Examples Current output model HX71-MA, HX71-MA-NB (4 to 20 mA) PANEL METER – HX71 CABLE BLACK WIRE – RED WIRE SHIELD WIRE PANEL METER POWER SUPPLY – PANEL METER HX71 CABLE Figure 5 - Current Transmitter Wiring Example BLACK WIRE –... -
Page 11: Rh Measured Vs Output Reading Table
RH Measured Vs Output Reading Table 8. RH Measured Vs Output Reading Table Output % Relative Humidity 4-20 mA 0-1 (0-5) Vdc 0.05 (.25) 0.10 (.50) 0.15 (.75) 0.20 (1.00) 0.25 (1.25) 0.30 (1.50) 0.35 (1.75) 10.4 0.40 (2.00) 11.2 0.45 (2.25) 12.0 0.50 (2.50) -
Page 12: Calibration And Maintenance
Your transmitter has been factory calibrated to meet or exceed the specifications outlined in this manual. The economical design of the HX71 Series does not allow for field adjustment. Contact our Customer Service Department if you believe your unit is not functioning correctly. -
Page 13: Specifications
Specifications 10. Specifications Relative Humidity Measuring Range: 5 - 95% (non-condensing) Accuracy:* ±4%RH @ 22°C (72ºF) from 15 to 85% ±4.5%RH @ 22°C (72ºF) below 15 and above 85% RH * EMC (Electro Magnetic Compatibility) Some of these devices may be subject to an additional reading error of up to 2% by RFI (Radio Frequency Interference) when subjected to a field strength of 3V/m between 625MHz and 725MHz. - Page 14 HX71 SERIES NOTES: RH Probe/Transmitter NOTES:...
- Page 15 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.
- Page 16 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE M U Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies M U Wire: Thermocouple, RTD & Thermistor M U Calibrators & Ice Point References M U Recorders, Controllers &...
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