Campbell HMP60 Manuel utilisateur

Revision: 10/2021

Campbell Scientific, Inc.

Table of contents

1. Introduction 1

2. Precautions 1

3. Initial inspection 1

4. QuickStart 2

5. Overview 4

6. Specifications 5

6.1 Temperature sensor 5

6.2 Relative humidity sensor 5

7. Installation 6

7.1 Wiring to data logger 6

7.2 Data logger programming 7

7.2.1 VoltSE() instruction 7

7.3 Mounting 8

7.3.1 Installation in a 41303-5A or 41303-5B 6-plate shield 9

7.3.2 Installation in a RAD06 6-plate shield or RAD10 10-plate shield 10

7.3.3 Mount the shield 10

8. Operation 11

8.1 Measurement 11

8.2 Long cable lengths 11

8.3 Absolute humidity 12

9. Troubleshooting and maintenance 13

9.1 Troubleshooting 13

9.2 Maintenance 13

9.2.1 Procedure for removing RH chip 14

10. Attributions and References 15

Appendix A. Importing Short Cut code into CRBasic Editor 16

Appendix B. Example programs 17

Table of contents - i

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.

For Edlog data logger support, check the availability of an older manual at

www.campbellsci.com/old-manuals .

2. Precautions

lREAD AND UNDERSTAND the Safety section at the back of this manual.

lCare should be taken when opening the shipping package to not damage or cut the cable

jacket. If damage to the cable is suspected, contact Campbell Scientific.

lAlthough the HMP60 is rugged, it should be handled as a precision scientific instrument.

lDo not touch the sensor element.

lRemove the yellow cap prior to installation.

lSantoprene® rubber, which composes the black outer jacket of the cable, will support

combustion in air. It is used because of its resistance to temperature extremes, moisture,

and UV degradation. It is rated as slow burning when tested according to U.L. 94 H.B. and

passes FMVSS302. However, local fire codes may preclude its use inside buildings.

3. Initial inspection

lUpon receipt of the HMP60, inspect the packaging and contents for damage. File damage

claims with the shipping company.

lThe model number and cable length are printed on a label at the connection end of the

cable. Check this information against the shipping documents to ensure the expected

product and cable length were received.

HMP60 Temperature and Relative Humidity Probe 1

4. QuickStart

A video that describes data logger programming using Short Cut is available at:

www.campbellsci.com/videos/cr1000x-data logger-getting-started-program-part-3 .Short

Cut is an easy way to program your data logger to measure the sensor and assign data logger

wiring terminals. Short Cut is available as a download on www.campbellsci.com . It is included

in installations of LoggerNet,RTDAQ, and PC400.

Use the following procedure to get started.

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 &

Relativite Humidity folder. 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 Kfor Kelvin.

HMP60 Temperature and Relative Humidity Probe 2

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 3

7. Select the measurement and its associated output option.

8. Click Finish and save the program. Send the program to the data logger if the data logger

is connected to the computer.

9. If the sensor is connected to the data logger, check the output of the sensor in the data

display in 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.

Features:

lField-replaceable humidity chip eliminates recalibration down time

lCompatible with the following data loggers: CR6, CR1000X, CR800 series, CR350 series,

CR300 series, CR3000, CR1000

HMP60 Temperature and Relative Humidity Probe 4

6. Specifications

Operating temperature: –40 to 60 °C

Probe length: 7.1 cm (2.8 in)

Probe body diameter: 1.2 cm (0.47 in)

Filter: 0.2 μm Teflon membrane

Filter diameter: 1.2 cm (0.47 in)

Housing

Body material: AISI 316 stainless steel

Filter cap material: Chrome-coated ABS plastic

Classification: IP65

Power consumption: 1 mA typical; 5 mA maximum

Supply voltage: 5 to 28 VDC

Settling time after power is

switched on: 1 s

Output signal range: 0 to 1 VDC

6.1 Temperature sensor

Sensor: 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 5

Typical accuracy

from 0 to 40 °C: ±3% RH over 0 to 90%

±5% RH over 90 to 100%

Typical Accuracy

from –40 to 0 °C

and 40 to 60 °C: ±5% RH over 0 to 90%

±7% RH over 90 to 100%

7. Installation

If you are programming your data logger with Short Cut, skip Wiring to data logger (p. 6) and

Data logger programming (p. 7). Short Cut does this work for you. See QuickStart (p. 2) for a

Short Cut tutorial.

7.1 Wiring to data logger

CAUTION:

Always connect the blue wire to the data logger first, followed by the black, white, and clear

wires. Connect the brown (power) wire last.

Table 7-1: Wire color, function, and data logger connection

Wire color Wire function Data logger connection terminal

Black Temperature signal Uconfigured for single-ended analog input1,

SE (single-ended, analog-voltage input)

White Relative humidity signal Uconfigured for single-ended analog input,

Blue Power ground and

signal reference G

Brown Power 12V or SW12

Clear EMF Shield ⏚(analog ground)

1Uterminals are automatically configured by the measurement instruction.

HMP60 Temperature and Relative Humidity Probe 6

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.

NOTE:

Short Cut cannot edit programs after they are imported and edited in CRBasic Editor.

AShort Cut tutorial is available in QuickStart (p. 2). If you wish to import Short Cut code into

CRBasic Editor to create or add to a customized program, follow the procedure in Importing

Short Cut code into CRBasic Editor (p. 16). Programming basics for CRBasic data loggers are

provided in the following sections. Complete program examples for select data loggers can be

found in Example programs (p. 17).

Measure the HMP60 with either the VoltSE() or VoltDiff() measurement instruction as

described in the following sections.

For a discussion on errors caused by long cable lengths, see Long cable lengths (p. 11).

7.2.1 VoltSE() instruction

When cable lengths are shorter than 6.1 meters or when power is switched, use the VoltSE()

measurement instruction to measure the temperature and relative humidity. The HMP60 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%.

VoltSE(Dest, Reps, Range, SEChan, MeasOff, SettlingTime, Integ/FNotch, Mult, Offset)

Variations:

lTemperature reported as °C – set Mult to 0.1 and Offset to –40

lTemperature reported as °F – set Mult to .18 and Offset to –40

lHumidity reported as a percent – set Mult to 0.1 and Offset to 0

lHumidity reported as a fraction – set Mult to 0.001 and Offset to 0

HMP60 Temperature and Relative Humidity Probe 7

NOTE:

When the probe is connected to a CS110 Electric Field Meter, the probe is measured by the

CS110 internal CR1000 data logger module using VoltSE() instructions. Relative humidity

and temperature signals are measured on single-ended terminals 1 and 2, respectively.

250µs integration should be used in the VoltSE() instructions.

7.3 Mounting

Sensors should be located over an open level area at least 9m (EPA) in diameter. The surface

should be covered by short grass or the natural earth surface where grass does not grow.

Sensors should be located at a distance of at least four times the height of any nearby

obstruction, and at least 30m (EPA) from large, paved areas. Sensors should be protected from

thermal radiation, and adequately ventilated.

Standard measurement heights:

1.5 m (AASC)

1.25 to 2.0 m (WMO)

2.0 m (EPA)

See Attributions and References (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

by a mounting clamp (FIGURE 7-2 (p. 9)).

This probe may also be housed in a 41003-5 or RAD10 10-plate shield. Additional hardware must

be used with the 41003-5. No additional hardware is required with the RAD10. A 10-plate shield

adapter allows the HMP60 to be mounted in the lower part of the 41003-5 shield.

The white color of these shields reflects solar radiation, and the louvered construction allows air

to pass freely through, thereby keeping the probe at or near ambient temperature. The RAD06

and RAD10 use a double-louvered design that offers improved sensor protection from insect

intrusion and driving rain and snow. In addition, the RAD06 and RAD10 shields have lower self-

heating in bright sunlight combined with higher temperatures (>24°C (75°F)) and low wind

speeds (<2m/s (4.5mph)), giving a better measurement.

Each of these solar radiation shields attaches to a crossarm, mast, or user-supplied pipe with a 2.5

to 5.3cm (1.0 to 2.1in) outer diameter.

HMP60 Temperature and Relative Humidity Probe 8

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