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MADE IN TAIWAN
RH820, RH820U USB & DC Power
RH820W Wireless
M4740/0109
Shop online at: omega.com e-mail: info@omega.com
For latest product manuals: omegamanual.info
INSTRUCTION
SHEET
Hydro Thermometer

Omega RH820 Specifications

General

Temperature range	-20 to 60 °C (-4 to 140 °F)
Humidity range	0 to 100 %RH
Temperature accuracy	±0.5 °C (±0.9 °F)
Power Supply	9V battery
Housing	ABS plastic
Resolution	0.1 °C/°F, 0.1 %RH
Display	Dual LCD
Temperature Resolution	0.1°C (0.1°F)

Summary

Introduction and Safety

Introduction to the Hydro Thermometer

Overview of the battery-powered meter for measuring relative humidity and temperature.

Safety Warnings

Precautions against electrical shock and damage from microwave ovens.

Federal Communications Commission Compliance

Information regarding FCC rules for device operation and interference.

Product Specifications

Electrical and Sensor Specifications

Details on temperature scales, measurement ranges, resolution, and accuracy for K-TYPE and thermistor sensors.

Relative Humidity Specifications

Information on humidity sensor range, accuracy, response time, and temperature coefficient.

Input Protection and Connectors

Details on input voltage protection and the type of thermocouple connectors supported.

General and Environmental Details

General Device Information

Overview of the LCD display, power source, battery life, and auto power-off function.

Environmental Operating Conditions

Specifies the ambient and storage temperature and humidity ranges for the device.

Wireless Features (820W)

Details on the wireless frequency range and transmission distance.

Operating Instructions

Power Switch and Auto Power Off

Instructions on turning the device on/off and disabling the auto-power function.

Temperature Scale and Backlight

How to select between Celsius/Fahrenheit and activate the display backlight.

Relative Mode and Sensor Selection

Using the REL button for relative measurements and switching between K-TYPE, NTC, and K-DP modes.

Data Logging and Recall

Instructions for saving, reading, and clearing memorized data.

Wireless Mode Operation (820W)

How to start, stop, and set up the wireless function for the 820W model.

Operator Maintenance and Warranty

Battery Replacement

Guidelines for replacing the AAA batteries when the low battery indicator appears.

Cleaning and Software

Recommendations for cleaning the device and notes on the software operation manual.

Warranty and Disclaimer

Details on the product warranty period, terms, and limitations of liability.

Return Requests and Inquiries

Procedures for obtaining an Authorized Return (AR) number for warranty and repair services.