Extech Instruments RH520 User Manual

RH520 V2.9 3/07 5
DISPLAY DESCRIPTION
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1. Temperature measurement graph
2. Internal memory usage meter
3. Vertical axis scale limits
4. Cursor / Alarm indicators
5. Push-button lock-out status indicator
6. Time display
7. Relative Humidity (RH) measurement graph
8. Date display
9. Function indicators
10. Numerical temperature reading display
11. Numerical RH reading display
12. Battery status indicator

Extech Instruments RH520 Specifications

General

Resolution	0.1% RH
Temperature Range	14°F to 140°F (-10°C to 60°C)
Power Supply	Four (4) AAA batteries
Sampling Rate	1 second to 24 hours
PC Interface	USB
Wet Bulb Range	14°F to 140°F (-10°C to 60°C)
Operating Temperature	14°F to 140°F (-10 to 60°C)

Summary

Introduction

Warranty

Specifications

RH520 Description

Display Description

Push-Button Description

Getting Started

Power

Details about power sources, battery backup, and indicators.

Mounting the RH520

Describes table top and wall mounting options for the device.

Measurement Probe

Information on the probe's cable and usage.

Push-Button Lock-Out Security Feature

Instructions for locking and unlocking the device's push-buttons.

Programming the RH520

Setting the Time and Date

Procedure for setting the device's time and date parameters.

Clearing the Internal Memory

Instructions for clearing recorded data and alarm history.

Selecting the Unit of Measure for Temperature (°C/°F)

How to switch between Celsius and Fahrenheit temperature units.

Setting the Vertical Resolution for the Temperature Graphic Display

Configuring the temperature graph's vertical scale limits.

Setting the Vertical Resolution for the RH Graphic Display

Configuring the RH graph's vertical scale limits.

Setting the Recording Sample Rate

Setting the Temperature Alarm Limits

Setting the RH Alarm Limits

Display Modes

Standard View

The default display state when the RH520 is turned on.

Cursor

Describes cursor location and movement for data point selection.

MAX-MIN Displays

Alarm Displays

Using the Clock to Sort Through Stored Readings

Dew Point Display

Sample Rate Display

Alarm Conditions and the Alarm History

Factory Default Settings

Lists the default configurations for LCD mode, resolution, and limits.

Battery Replacement

Step-by-step guide for replacing the device's batteries.

Optional Alarm Relay Module

Information on connecting and using the optional alarm relay module.

Calibration and Repair Services