Extech RH101 Operating Manual

User's Guide

Hygro-Thermometer + InfraRed Thermometer

Model RH101

Patented

Introduction

Congratulations on your purchase of the Extech Hygro-Thermometer plus InfraRed Thermometer. This device measures relative humidity, air temperature (with probe), and surface temperature (with the InfraRed function). The large, easy-to-read backlit LCD includes primary and secondary displays plus numerous status indicators. The InfraRed feature includes a laser pointer for convenient targeting. Careful use of this meter will provide years of reliable service.

Specifications

Function Range and Resolution Accuracy Humidity 10.0 to 95.0% RH ± 3.5% RH Air Temperature -4 to 140oF (-20 to 60oC) ± 3.0oF (± 2.0oC) IR Temperature

Display Dual LCD with Backlight and status indicators Sensor Type Humidity: Precision capacitance sensor

Response Time IR Temperature: 0.5 seconds; Probe Temperature and

Accuracy note Accuracy is specified for the following ambient temperature

Sampling Rate 2.5 samples per second InfraRed Emissivity 0.95 (fixed) IR Field of View D/S = Approx. 8:1 ratio (D = distance, S = spot) Laser power Less than 1mW IR Spectral Response 6 to 14 μm (wavelength) Operating Conditions 32 to 122 Storage Conditions 14 to 140 Power Supply 9V Battery with auto power off (after 10 minutes) Battery Life Approx. 24 hours (if Backlight and Laser are used continuously

Dimensions / Weight 5.9 x 2.8 x 1.4” (150 x 72 x 35mm); 8.3 oz. (235g) Patent Notice U.S. Patent 7168316

-58.0 to -4.0oF (-50.0 to -20.0oC) ± 9oF (± 5oC)

-4.0 to 199.9oF (-20.0 to 93.3oC) 200 to 400oF (93oC to 204oC)

400 to 932

F (204oC to 500oC) ± 3% of rdg

± 2% of rdg or ± 4

Temperature: Thermistor (probe) and InfraRed

Relative Humidity: 3 minutes

range: 64 to 82°F (18 to 28°C)

F (0 to 50oC); < 80% RH non-condensing

F (-10 to 60oC); <80% RH non-condensing

the battery life is reduced to 2 to 3 hours approx.)

F (± 2oC)

Safety

• Use extreme caution when the laser pointer beam is on

• Do not point the beam toward anyone's eye or allow the beam

to strike the eye from a reflective surface

• Do not use the laser near explosive gases or in other potentially explosive areas

RH101 V2.1 8/07 2

Meter Description

1. Humidity/Air Temperature Probe

2. Probe input jack

3. Laser pointer

4. IR Sensor

5. Rubber holster

6. LCD Display

7. IR thermometer measurement button

8. IR and Relative Humidity function buttons (4)

9. Air Temperature function buttons (3)

10. Probe holder

11. Power ON/OFF button

12. Backlight button

Note: The battery compartment, tilt stand, tripod mount, and probe holder removal screw are located on the rear of the instrument

Display Layout

• MAX (top of LCD): Max Hold function engaged for the Air Temperature function

• HOLD (top of LCD): Data Hold function engaged for the Air Temperature function

• PROBE TEMP: Reminder that the top LCD digits represent Air (Probe) Temperature

• : Indicates that the laser pointer is on.

• IR TEMP: Indicates that the larger LCD digits represent IR temperature measurement

• MAX (bottom of LCD): Max Hold for the IR Temperature and RH function

• HOLD (bottom of LCD): Data Hold for the IR Temperature function and RH function

•

C / oF: Temperature units of measure

• %RH: Relative Humidity unit of measure

• Large LCD digits at center of display for Relative Humidity and IR Temperature

• Smaller LCD digits at top, right of display for Probe Temperature

• : Low battery indicator

RH101 V2.1 8/07 3

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