Campbell Scientific HMP60 User Manual

HMP60 Temperature and

Relative Humidity Probe

Revision: 7/12

Copyright © 1995-2012

Campbell Scientific, Inc.

Warranty

“PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are
warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in
materials and workmanship under normal use and service for twelve (12)
months from date of shipment unless otherwise specified in the corresponding
Campbell pricelist or product manual. Products not manufactured, but that are
re-sold by Campbell, are warranted only to the limits extended by the original
manufacturer. Batteries, fine-wire thermocouples, desiccant, and other
consumables have no warranty. Campbell's obligation under this warranty is
limited to repairing or replacing (at Campbell's option) defective products,
which shall be the sole and exclusive remedy under this warranty. The
customer shall assume all costs of removing, reinstalling, and shipping
defective products to Campbell. Campbell will return such products by surface
carrier prepaid within the continental United States of America. To all other
locations, Campbell will return such products best way CIP (Port of Entry)
INCOTERM® 2010, prepaid. This warranty shall not apply to any products
which have been subjected to modification, misuse, neglect, improper service,
accidents of nature, or shipping damage. This warranty is in lieu of all other
warranties, expressed or implied. The warranty for installation services
performed by Campbell such as programming to customer specifications,
electrical connections to products manufactured by Campbell, and product
specific training, is part of Campbell’s product warranty. CAMPBELL
EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Campbell is not liable for any special, indirect,
incidental, and/or consequential damages.”

Assistance

Products may not be returned without prior authorization. The following
contact information is for US and international customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit

www.campbellsci.com to determine which Campbell Scientific company serves

your country.

To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container. Campbell
Scientific's shipping address is:

CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784

For all returns, the customer must fill out a "Statement of Product Cleanliness
and Decontamination" form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to [e-mail] or faxed to
[phone]. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer's expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.

HMP60 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. Cautionary Statements................................................1

3. Initial Inspection ..........................................................1

4. Quickstart.....................................................................2

4.1 Step 1 — Mount the Probe .......................................................................2

4.2 Step 2 — Use SCWin Short Cut to Program Datalogger and

Generate Wiring Diagram......................................................................5

5. Overview.......................................................................7

6. Specifications ..............................................................8

6.1 Temperature Sensor..................................................................................9

6.2 Relative Humidity Sensor.........................................................................9

7. Installation..................................................................10

7.1 Siting.......................................................................................................10

7.2 Mounting and Assembly.........................................................................10

7.3 Wiring.....................................................................................................11

7.4 Programming ..........................................................................................11

7.4.1 Example for CR1000 ....................................................................12

7.4.2 Example for CR10X .....................................................................13

7.5 Long Lead Lengths.................................................................................13

7.6 Absolute Humidity..................................................................................14

7.6.1 CR1000 Vapor Pressure Example.................................................15

7.6.2 Sample CR10(X) Program that Computes Vapor Pressure

and Saturation Vapor Pressure ..................................................16

8. Maintenance ...............................................................17

8.1 Procedure for Removing RH Chip .........................................................17

9. Troubleshooting ........................................................18

10. References ...............................................................18

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HMP60 Table of Contents

Figures

Tables

4-1. HMP60 as shipped.................................................................................. 3

4-2. HMP60 and 41303-5A Radiation Shield on a tripod mast ..................... 3

4-3. HMP60 and 41303-5A Radiation Shield on a CM202 Crossarm........... 4

4-4. HMP60 and 41303-5A Radiation Shield................................................ 4

7-1. HMP60 wiring ...................................................................................... 11

8-1. Exploded view of HMP60 (as shipped)................................................ 17

5-1. Recommended Lead Lengths ................................................................. 8

7-1. Datalogger Connections ....................................................................... 11

7-2. Calibration for Temperature ................................................................. 12

7-3. Calibration for Relative Humidity ........................................................ 12

7-4. Wiring for CR1000 and CR10X Examples .......................................... 12

7-5. Wiring for Vapor Pressure Examples................................................... 15

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HMP60 Temperature and Relative Humidity Probe

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
dataloggers.

Before using the HMP60, please study

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

• Section 4, Quickstart

More details are available in the remaining sections.

2. Cautionary Statements

• Care should be taken when opening the shipping package to not damage

or cut the cable jacket. If damage to the cable is suspected, consult with a
Campbell Scientific applications engineer.

• Although the HMP60 is rugged, it should be handled as a precision

scientific instrument.

• The black outer jacket of the cable is Santoprene® rubber. This

compound was chosen for its resistance to temperature extremes, moisture,
and UV degradation. However, this jacket will support combustion in air.
It is rated as slow burning when tested according to U.L. 94 H.B. and will
pass FMVSS302. Local fire codes may preclude its use inside buildings.

• Remember to remove the yellow cap prior to installation.

3. Initial Inspection

• Upon receipt of the HMP60, inspect the packaging and contents for

damage. File damage claims with the shipping company.

• The 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 correct product and cable length are received.

• The HMP60 is shipped with an instruction manual or a ResourceDVD.

1

HMP60 Temperature and Relative Humidity Probe

4. Quickstart

4.1 Step 1 — Mount the Probe

Review Section 7, Installation for complete instructions. To install the
HMP60, you will need:

• 41305-5A 6-plate Radiation Shield

• 1/2" open end wrench

• small screw driver provided with datalogger

• small Phillips screwdriver

• UV resistant cable ties

• small pair of diagonal-cutting pliers

1. Pull off the yellow shipping cap (see Figure 4-1).

2. Loosen the plastic split collar at the base of the shield (reversing the

removable portion if necessary) and gently insert the probe.

3. Tighten the mounting clamp until it lightly grips the probe body (see

Figure 4-4).

CAUTION

4. Continue to push the probe up into the body of the shield until the step in

the tube stops it from going any further.

5. Tighten the collar until it securely grips the probe (see Figure 4-4).

6. Attach the radiation shield to the tripod mast, crossarm, or tower leg using

the supplied U-bolt. See Figures 4-2 and 4-3 for examples of shield
mounting.

7. Route the cable to the datalogger, and secure the cable to the mounting

structure using cable ties.

Failure to secure the cable can lead to breakage of the
wires due to fatigue if the cable is allowed to blow back
and forth in the wind.

2