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Extech Instruments RH300 User Manual

Extech Instruments RH300
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USER MANUAL
Digital Psychrometer
Models RH300 and RH305 kit
Additional User Manual Translations available at www.extech.com

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Extech Instruments RH300 Specifications

General IconGeneral
Humidity Resolution0.1% RH
Humidity Accuracy±3% RH
Temperature Resolution0.1°C/°F
Data LoggingYes
PC InterfaceUSB
DisplayDual LCD
TypeHygro-Thermometer
Temperature Range-10°C to 50°C (14°F to 122°F)
Temperature Accuracy±1°C/1.8°F

Summary

Digital Psychrometer

Button Descriptions

Power ON/OFF Button

Describes how to turn the device on or off using the power button.

Display Description

Operation

Air Temperature and Relative Humidity Measurements

Step-by-step guide for taking air temperature and relative humidity measurements.

Optional External Probe (TP890) Temperature Measurements

Instructions for connecting and using the optional TP890 probe for temperature measurements.

Minimum (MIN) Maximum (MAX) Recording

Instructions on how to view, exit, and clear minimum and maximum recorded readings.

Calibration

Accuracy Verification

Procedure for verifying the accuracy of 33% or 75% RH readings using salt bottles.

Relative Humidity Calibration (33% and 75%)

Step-by-step instructions for calibrating the psychrometer's RH measurement.

Maintenance

Battery Replacement

Instructions for replacing batteries and safety reminders for disposal.

Error Message Displays

List and explanation of error codes (ER1-ER5) that may appear on the display.

Specifications

Humidity Specifications

Details the range, resolution, and accuracy for humidity measurements.

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