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Extech Instruments RH520A User Manual

Extech Instruments RH520A
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USER MANUAL
Paperless Humidity/Temperature Chart Recorder
Model RH520A
Additional User Manual Translations available at www.extech.com
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Extech Instruments RH520A Specifications

Temperature and Humidity IconTemperature and Humidity
temperature range-28 to 60 °C
temperature accuracy±1.0 °C
humidity range10 to 95 %
humidity accuracy±3.0 % RH
dew point temperature-28 to 60 °C
Power IconPower
power supplyThree ‘AA’ batteries and AC adaptor
dc voltage5 V
battery life4 weeks typical
Operating Environment IconOperating Environment
operating temperature range (control module and display)0 to 50 °C
operating temperature range (sensor)-28 to 60 °C
operating humidity (control module and display)90 % RH max.
Memory and Data Logging IconMemory and Data Logging
internal memory storage49, 152 complete reading sets
sampling interval0.1 to 199.9 minutes
alarm output current3.4 mA @ 5 VDC
Weight and Dimensions IconWeight and Dimensions
weight357 g
dimensions127 x 196 x 23 mm

Summary

RH520A Device Description

Data Reset Button

Clears recorded data and alarm history.

Display Description and Elements

Push-Button Functions

VIEW Button

Return to Standard View or escape functions.

ALARM Button

Display/set alarm values or silence alarms.

TIME Button

View readings by time or set time/date.

SET Button

Set new parameters or save settings.

TEMP Button

Set temperature graph range or alarm values.

RH Button

Set RH graph range or alarm values.

Arrow Keys

Scroll data and navigate the display.

Keypad Quick Reference

Getting Started and Setup

Programming the RH520A

Setting Time and Date

Procedure to set the device's clock and calendar.

Clearing Internal Memory

How to erase stored readings and reset parameters.

Setting Recording Sample Rate

Configuring the frequency of data logging.

Setting Temperature Alarm Limits

Defining high and low temperature alert thresholds.

Setting RH Alarm Limits

Defining high and low RH alert thresholds.

Display Modes and Data Viewing

Cursor Navigation

How to navigate and view specific data points on graphs.

Max/Min and Alarm Data

Viewing Alarm History and Status

Accessing past and present alarm events.

Time-Based Data and Dew Point

Alarm Management and Battery Care

Standard View Alarm Indicators

How alarms appear in the main display mode.

Battery Replacement Procedure

Step-by-step guide for changing batteries.

Specifications and Data Transfer

Temperature Specifications

Operating and accuracy details for temperature.

Humidity Specifications

Operating and accuracy details for humidity.

Operating Environment Limits

Device and sensor temperature/humidity limits.

PC Software Availability

Information on where to find the PC interface software.

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