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HMP45C Temperature and Relative Humidity Probe User Guide Issued 27.5.09 Copyright © 1990-2009 Campbel

HMP45C Temperature and RH Probe 2 2.1 Temperature Sensor Sensor: 1000 Ω PRT, IEC 751 1/3 Class B Temperature Measurement Range: -40°C to +60°C Temp

User Guide 3 Do not overtighten the nut that holds in the probe as the probe could be damaged. Figure 1. HMP45C and 41003-5 Radiation Shield on a T

HMP45C Temperature and RH Probe 4 5. Continue to carefully insert the probe a further 10mm, until the shoulder of the larger section is approximately

User Guide 5 1. Do not push the probe so far into the radiation shield that the sensor tip touches the top of the shield. 2. Ensure that your last

HMP45C Temperature and RH Probe 6 Table 1. Connections for Single-Ended Measurements Sensor Connection Colour CR10X CR1000, CR3000, CR800,

User Guide 7 Table 3. Power Connections using PSW12 Peripherals HMP45C PSW12 Peripheral Datalogger Descrip

HMP45C Temperature and RH Probe 8 Table 6. Wiring for Single-ended Measurement Examples Description Colour CR1000 CR10(X) Temperature White SE 2 (

User Guide 9 CR10(X) Program using Single-Ended Measurement Instructions Using a PSW12 or SW12V on Datalogger ;Turn the HMP45C on. ; 01: Do (P86) 1:

HMP45C Temperature and RH Probe 10 6. Long Lead Lengths This section describes the error associated with measuring the HMP45C with a single-ended mea

User Guide 11 CR1000 Program using Differential Measurement Instructions Using SW12 on Datalogger 'CR1000 program to measure HMP45C with differen

HMP45C Temperature and RH Probe 12 ;Measure the HMP45C temperature. ; 03: Volt (Diff) (P2) 1: 1 Reps 2: 5 2500 mV Slow Range ;CR510, CR500 (

User Guide 13 in the air has not changed. Thus, the amount of water vapour in the air, relative to saturation, has decreased. Because of the inverse

HMP45C Temperature and RH Probe 14 CR10(X) Program that Computes Vapour Pressure and Saturation Vapour Pressure ;Turn the HMP45C on. ; 01: Do (P86)

User Guide 15 ;Turn the HMP45C off. ; 05: Do (P86) 1: 51 Set Port 1 Low ;Compute the saturation vapour pressure. ;The temperature must be in d

HMP45C Temperature and RH Probe 16 9. Troubleshooting Symptom: -9999, NAN, -40 deg C, or 0% relative humidity 1. Check that the sensor is wired to t

Appendix A. Wiring for Older HMP45C Probes Description Colour Temperature Signal Yellow Relative Humidity Signal Blue Signal Reference Purple Po

CAMPBELL SCIENTIFIC COMPANIES Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci

Guarantee This equipment is guaranteed against defects in materials and workmanship. This guarantee applies for twelve months from date of delivery.

PLEASE READ FIRST About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American

Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to speci

Tables 1. Connections for Single-Ended Measurements....6 2. Connections for Differential Measurements...

1 HMP45C Temperature and Relative Humidity Probe 1. General Description The HMP45C Temperature and Relative Humidity probe contains a Platinum Resist