Campbell HMP60 Product Manual
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Campbell HMP60 Product Manual

Temperature and relative humidity probe
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Revision: 10/2021
Copyright © 1995 – 2021
Campbell Scientific, Inc.

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Summary of Contents for Campbell HMP60

  • Page 1 Revision: 10/2021 Copyright © 1995 – 2021 Campbell Scientific, Inc.

  • Page 2: Table Of Contents

    Table of contents 1. Introduction 2. Precautions 3. Initial inspection 4. QuickStart 5. Overview 6. Specifications 6.1 Temperature sensor 6.2 Relative humidity sensor 7. Installation 7.1 Wiring to data logger 7.2 Data logger programming 7.2.1 VoltSE() instruction 7.3 Mounting 7.3.1 Installation in a 41303-5A or 41303-5B 6-plate shield 7.3.2 Installation in a RAD06 6-plate shield or RAD10 10-plate shield 7.3.3 Mount the shield 8.

  • Page 3: Introduction

    1. Introduction The HMP60 probe measures temperature for the range of –40 to 60 °C, and relative humidity for the range of 0 to 100% RH. It is suitable for long-term, unattended monitoring, and is compatible with all Campbell Scientific data loggers.

  • Page 4: Quickstart

    1. Open Short Cut and click Create New Program. 2. Double-click the data logger model. 3. In the Available Sensors and Devices box, type HMP60 or locate the sensor in the Sensors > Meteorological > Relative Humidity & Temperature > HMP50/HMP60 Temperature &...
  • Page 5 4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after wiring the sensor. 5. Repeat steps three and four for other sensors. 6. In Output Setup, type the scan rate, meaningful table names, and Data Output Storage Interval. HMP60 Temperature and Relative Humidity Probe...

  • Page 6: Overview

    LoggerNet, RTDAQ, or PC400 to make sure it is making reasonable measurements. 5. Overview The HMP60 Temperature and Relative Humidity probe contains a Platinum Resistance Temperature detector (PRT) and a Vaisala INTERCAP® capacitive relative humidity sensor. It is suitable for long-term, unattended monitoring. The humidity chip is field-replaceable, eliminating recalibration downtime.

  • Page 7: Specifications

    1000 Ω PRT, DIN 43760B Temperature measurement range: –40 to 60 °C Temperature accuracy: ±0.6 °C (–40 to 60 °C) 6.2 Relative humidity sensor Sensor: INTERCAP® Relative humidity measurement range: 0 to 100% non-condensing HMP60 Temperature and Relative Humidity Probe...

  • Page 8: Installation

    U configured for single-ended analog input, White Relative humidity signal Power ground and Blue signal reference Brown Power 12V or SW12 Clear EMF Shield ⏚ (analog ground) U terminals are automatically configured by the measurement instruction. HMP60 Temperature and Relative Humidity Probe...

  • Page 9: Data Logger Programming

    7.2 Data logger programming Short Cut is the best source for up-to-date programming code for Campbell Scientific data loggers. If your data acquisition requirements are simple, you can probably create and maintain a data logger program exclusively with Short Cut. If your data acquisition needs are more complex, the files that Short Cut creates are a great source for programming code to start a new program or add to an existing custom program.

  • Page 10: Mounting

    (p. 15) for a list of references that discuss temperature and relative humidity sensors. When used in the field, the HMP60 must be housed inside a solar radiation shield. Typically, the 41303-5A or RAD06 6-plate solar radiation shield is used. The HMP60 is held within the 41303-5A...

  • Page 11: Installation In A 41303-5A Or 41303-5B 6-Plate Shield

    (reversing the removable portion if necessary) and gently insert the probe. 3. Tighten the screws on the collar until it firmly grips the probe body (see FIGURE 7-2 (p. 9)). FIGURE 7-2. HMP60 and 41303-5A Radiation Shield HMP60 Temperature and Relative Humidity Probe...

  • Page 12: Installation In A Rad06 6-Plate Shield Or Rad10 10-Plate Shield

    Failure to secure the cable can lead to breakage of the wires due to fatigue caused by blowing back and forth in the wind. FIGURE 7-3. HMP60 and 41303-5A Radiation Shield on a tripod mast (left) and on a CM202 Crossarm (right)

  • Page 13: Operation

    12 V. There will be a voltage drop along this wire because the wire has resistance. The HMP60 draws approximately 2 mA (worst case) when it is powered. The wire used in the HMP60 has resistance of 26.2 Ω/1000 feet. HMP60 Temperature and Relative Humidity Probe...

  • Page 14: Absolute Humidity

    V 8.3 Absolute humidity The HMP60 measures relative humidity. Relative humidity is defined by the following equation: Eq. 2 where RH is the relative humidity, e is the vapor pressure in kPa, and e is the saturation vapor pressure in kPa.

  • Page 15: Troubleshooting And Maintenance

    Allow the shield to dry before remounting. The white screen at the tip of the HMP60 should also be checked for contaminants. When installed in close proximity to the ocean or other bodies of salt water (e.g., Great Salt Lake), a coating of salt (mostly NaCl) may build up on the radiation shield, sensor, filter and even the chip.

  • Page 16: Procedure For Removing Rh Chip

    FIGURE 9-1. Exploded view of HMP60 (as shipped) The offset and gain on the HMP60 electronics cannot be adjusted as part of a recalibration. Generally, the RH chip should be replaced every two years. To determine if the chip needs to be replaced, compare the RH reading with a reference, and replace the RH chip when the relative humidity measurement is out of tolerance.

  • Page 17: Attributions And References

    Weiss, A., 1977: Algorithms for the calculation of moist air properties on a hand calculator, Amer. Soc. Ag. Eng., 20, 1133-1136. WMO, 2008. Guide to Meteorological Instruments and Methods of Observation. World Meteorological Organization No. 8, 7th edition, Geneva, Switzerland. HMP60 Temperature and Relative Humidity Probe...

  • Page 18: Appendix A. Importing Short Cut Code Into Crbasic Editor

    Block. This adds an apostrophe (') to the beginning of each of the highlighted lines, which instructs the data logger compiler to ignore those lines when compiling. The Comment Block feature is demonstrated at about 5:10 in the CRBasic | Features video HMP60 Temperature and Relative Humidity Probe...

  • Page 19: Appendix B. Example Programs

    Other data loggers are programmed similarly. CRBasic Example 1: Temperature and RH program 'Program measures the HMP60 probe once every 5 seconds and stores the average 'temperature and a sample of the relative humidity every 60 minutes.
  • Page 20 Public AirTC Public Public DataTable(Temp_RH,True,-1) DataInterval(0,60,Min,0) Average(1,AirTC,FP2,0) Sample(1,RH,FP2) Average(1,VP, FP2,0) EndTable BeginProg Scan(5,Sec,1,0) 'HMP60 Temperature & Relative Humidity Sensor measurements AirTC and RH: VoltSe(AirTC,1,mV1000,1,0,0,60,0.1,-40.0) VoltSe(RH,1,mV1000,2,0,0,60,0.1,0) (RH>100) AND (RH<108) Then RH=100 VaporPressure(VP,AirTC,RH) CallTable(Temp_RH) NextScan EndProg HMP60 Temperature and Relative Humidity Probe...
  • Page 21 See Product Details on the Ordering Information pages at www.campbellsci.com . Other manufacturer's products, that are resold by Campbell Scientific, are warranted only to the limits extended by the original manufacturer. Refer to www.campbellsci.com/terms#warranty for more information.
  • Page 22 To obtain a Returned Materials Authorization or Repair Reference number, contact your CAMPBELL SCIENTIFIC regional office. Please write the issued number clearly on the outside of the shipping container and ship as directed. For all returns, the customer must provide a “Statement of Product Cleanliness and Decontamination”...
  • Page 23 Do not recharge, disassemble, heat above 100 °C (212 °F), solder directly to the cell, incinerate, or expose contents to water. Dispose of spent batteries properly. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR...
  • Page 24 Campbell Scientific Regional Offices Australia France Thailand Location: Garbutt, QLD Australia Location: Vincennes, France Location: Bangkok, Thailand Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 Email: info@campbellsci.com.au Email: info@campbellsci.fr Email: info@campbellsci.asia Website: www.campbellsci.com.au Website: www.campbellsci.fr Website: www.campbellsci.asia Brazil Germany Location: São Paulo, SP Brazil...

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