Campbell HMP60 Instruction Manual
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Campbell HMP60 Instruction Manual

Temperature and relative humidity probe
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HMP60 Temperature and
Relative Humidity Probe
Revision: 9/17
C o p y r i g h t
©
1 9 9 5 - 2 0 1 7
C a m p b e l l
S c i e n t i f i c ,
I n c .

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Summary of Contents for Campbell HMP60

  • Page 1 HMP60 Temperature and Relative Humidity Probe Revision: 9/17 C o p y r i g h t © 1 9 9 5 - 2 0 1 7 C a m p b e l l S c i e n t i f i c ,...
  • Page 3 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...

  • Page 5: About This Manual

    PLEASE READ FIRST About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in...
  • Page 7 • Periodically (at least yearly) check electrical ground connections. 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 ATTACHMENTS TO TRIPODS AND TOWERS...

  • Page 9: Table Of Contents

    Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ..............1 2. Precautions ..............1 3. Initial Inspection ............1 4.
  • Page 10 HMP60 and 41303-5A Radiation Shield on a tripod mast (left) and on a CM202 Crossarm (right) ........... 8 7-4. HMP60 and RAD06 Radiation Shield on a tripod mast ...... 8 9-1. Exploded view of HMP60 (as shipped) ..........10 Tables 7-1.

  • Page 11: Introduction

    Humidity Probe 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 dataloggers.
  • Page 12 3. Under the Available Sensors and Devices list, select Sensors | Meteorological | Relative Humidity & Temperature and double-click HMP50/HMP60 Temperature & Relative Humidity Sensor. Data defaults to degree Celsius. This can be changed by clicking the Deg C box and selecting Deg F, for degrees Fahrenheit, or K for Kelvin.

  • Page 13: Overview

    4, check the output of the sensor in the datalogger support software data display to make sure it is making reasonable measurements. Overview The HMP60 Temperature and Relative Humidity probe contains a Platinum Resistance Temperature detector (PRT) and a Vaisala INTERCAP ®...

  • Page 14: Temperature Sensor

    HMP60 Temperature and Relative Humidity Probe Temperature Sensor Sensor: 1000 Ω PRT, DIN 43760B Temperature Measurement Range: –40 to 60 °C Temperature Accuracy: ±0.6 °C (–40 to 60 °C) Relative Humidity Sensor Sensor: INTERCAP ® Relative Humidity Measurement Range: 0 to 100% non-condensing Typical Accuracy from 0 to 40 °C:...

  • Page 15: Datalogger Programming

    (p. B-1) 7.2.1 VoltSE() Instruction Use the VoltSE() CRBasic instruction to measure the HMP60’s signal. The probe output scale is 0 to 1000 millivolts for the temperature range of –40 to 60 °C and for the relative humidity range of 0 to 100%.

  • Page 16: Installation

    (p. 11) 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 six-plate solar radiation shield is used. The HMP60 is held within the 41303-5A by a mounting clamp (FIGURE 7-2).

  • Page 17: Installation In A 41303-5A Or 41303-5B 6-Plate Shield

    3. Tighten the screws on the collar until it firmly grips the probe body (see FIGURE 7-2). FIGURE 7-2. HMP60 and 41303-5A Radiation Shield 7.3.2 Installation in a RAD06 6-Plate Shield or RAD10 10-Plate Shield 1. Pull off the yellow shipping cap (see FIGURE 7-1).

  • Page 18: Operation

    FIGURE 7-3. HMP60 and 41303-5A Radiation Shield on a tripod mast (left) and on a CM202 Crossarm (right) FIGURE 7-4. HMP60 and RAD06 Radiation Shield on a tripod mast Operation Measurement...

  • Page 19: Long Lead Lengths

    Understanding the following details are not required for the general operation of the HMP60 with Campbell Scientific’s dataloggers. The signal reference and the power ground (black) are the same lead in the HMP60. When the HMP60 temperature and relative humidity are measured, both the signal reference and power ground are connected to ground at the datalogger.

  • Page 20: Maintenance

    9598 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 21: Attributions And References

    HMP60 Temperature and Relative Humidity Probe CAUTION To prevent scratching, avoid touching the silver RH chip, and handle the RH chip with care. 3. Rinse the RH chip or dispose of the old RH chip. 4. Hold the sides of the rinsed or new chip and plug it in.
  • Page 22 HMP60 Temperature and Relative Humidity Probe...

  • Page 23: Importing Short Cut Code To Crbasic Editor

    Appendix A. Importing Short Cut Code to CRBasic Editor This tutorial shows: How to import a Short Cut program into a program editor for • additional refinement • How to import a wiring diagram from Short Cut into the comments of a custom program Short Cut creates files, which can be imported into CRBasic Editor.

  • Page 25: Example Program

    CR300- and CR6-series, CR3000, and CR5000 dataloggers. CRBasic Example B-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. 'Wiring Diagram...

  • Page 27: Absolute Humidity

    Appendix C. Absolute Humidity The HMP60 measures the relative humidity. Relative humidity is defined by the equation below: ×100 (C-1) where RH is the relative humidity, e is the vapour pressure in kPa , and e is the saturation vapour pressure in kPa. The vapour pressure, e, is an absolute measure of the amount of water vapour in the air and is related to the dew point temperature.

  • Page 28: C-1. Vapour Pressure Program

    Signal & Power Reference 'Clear Shield Ground Symbol Public AirTC Public Public DataTable(Table1,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,mV2500,1,0,0,_60Hz,0.1,-40.0) VoltSE(RH,1,mV2500,2,0,0,_60Hz,0.1,0) (RH>100) (RH<108) Then RH=100 VaporPressure(VP,AirTC,RH) CallTable(Table1) NextScan EndProg...
  • Page 30 Santo Domingo, Heredia 40305 SOUTH AFRICA COSTA RICA • cleroux@csafrica.co.za • info@campbellsci.cc www.campbellsci.co.za www.campbellsci.cc Campbell Scientific Southeast Asia Co., Ltd. Campbell Scientific Ltd. 877/22 Nirvana@Work, Rama 9 Road Campbell Park Suan Luang Subdistrict, Suan Luang District 80 Hathern Road Bangkok 10250...

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