Instruction manual
Table Of Contents
- Revision and Copyright Information
- Limited Warranty
- Assistance
- Precautions
- Table of Contents
- 1. Introduction
- 2. Cautionary Statements
- 3. Initial Inspection
- 4. Quickstart
- 5. Overview
- 6. Specifications
- 7. Installation
- 8. Sensor Maintenance
- 9. Troubleshooting
- 10. References
- Appendix A. Importing Short Cut Code
- Appendix B. Example Programs
- Appendix C. Interfacing with HMP155A RS-485 Output
- Campbell Scientific Companies

HMP155ATemperature and Relative Humidity Probe
3.1 Ships With
The HMP155A ships with:
(1) Adjustment Screwdriver from manufacturer
(1) Calibration Sheet
(1) Instruction Manual or ResourceDVD
4. Quickstart
Review Section 7, Installation, for siting, wiring, and CRBasic programming
information.
4.1 Assembly and Mounting
Tools Required:
• 1/2 inch open end wrench
• small screw driver provided with datalogger
• UV resistant cable ties
• small pair of diagonal-cutting pliers
To install the HMP155A, you will need the 41005-5 14-Plate Radiation Shield.
The HMP155A is packaged with a white connector cover and a yellow sensor
head protective cap. See FIGURE 4-1.
FIGURE 4-1. HMP155A in shipping box
1. Slide the white connector cover off the sensor head before removing the
sensor from the box.
Protective Cap
Connector Cover
2










