Extech Instruments RHT50 User manual

EXTECH RHT50 USER GUIDE

http://www.manuallib.com/file/2691517

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This Manual: http://www.manuallib.com/file/2691517

User's Guide

Humidity + Temperature + Pressure Datalogger

Model RHT50

This Manual: http://www.manuallib.com/file/2691517

RHT50 V2.1 04/12

Introduction

Congratulations on your purchase of the Relative Humidity / Temperature / Pressure Datalogger. This datalogger

measures and stores up to 10,000 readings. The user can easily configure the logging rate, high/low alarm and

start-mode, and download the stored data by plugging the module into a PC's USB port and running the supplied

PC software. Data can then be graphed, printed and exported to other applications. The data logger is supplied

with a long-life lithium battery, which can typically allow logging for one year. This meter is shipped fully tested and

calibrated and, with proper use, will provide years of reliable service.

Features

Memory 10,000 temperature, humidity and pressure readings

Selectable data sampling rate: 1 minute to 18 hours

Manual and automatic start

Status Indication via Red/Yellow LED and Green LED

USB Interface for Set-up and Data Download

User-Programmable Alarm Thresholds

Long battery life

Description

1. USB connector

2. Alarm LED (red/yellow)

3. Record LED (green)

4. Start button

5. Battery cover latch

6. Tripod mount

7. RH, Temperature, Pressure sensors

8. Mounting bracket

This Manual: http://www.manuallib.com/file/2691517

RHT50 V2.1 04/12

Operation

INSTALLING THE GRAPHING SOFTWARE

Install the supplied WindowsTM PC Datalogger Software by placing the supplied program disk in the PC’s CD-ROM

drive. If the installation program does not automatically open and provide on-screen prompts, open and browse the

CD-ROM drive, then find and double-click on the SETUP.EXE file included on the program disk. Follow the

on-screen prompts to complete the installation.

Before running the graphing software, please connect the RHT50 to the PC and install the USB Driver software as

described in the next section.

INSTALLING THE USB DRIVER

Plug the RHT50 into an available USB port on the PC. If this is the first time that the RHT50 has been connected to

the particular port on the PC, the following screen will appear:

Make sure the program disk is still in the PC CD-ROM drive. Select the ‘recommended’ installation and follow the

on-screen prompts to complete the driver installation. If this is a repeat connection of the RHT50 to the USB port,

the driver installation process will be automatically skipped.

Refer to the HELP utility in the software program for detailed instructions on using the software to download and

process recorded data. The LED status guide provided below is offered for easy reference.

This Manual: http://www.manuallib.com/file/2691517

RHT50 V2.1 04/12

LED STATUS GUIDE

LEDs

Record Alarm

Meaning

No LED Logging not started

No LED Logging stopped *

No LED Battery discharged **

Green

Green flash (single): Logging indication *****

Green flashes (five) Reset

Green flashes (six) Start Logging

Red

Red double flash every 30 sec. Low battery ***

Red single flash Logging, alarm event ****

Red flashes (six) Stop logging *

Yellow

Yellow flash every 20 seconds Memory full *

•* Connect the datalogger to the PC and download data

•** Replace the battery, data will not be lost

•*** Logging will stop, data will remain in memory

•**** Occurs if an alarm is exceeded

•***** Flash cycle time is set from the software

This Manual: http://www.manuallib.com/file/2691517

RHT50 V2.1 04/12

Specifications

Range Accuracy

0 to 20 and 80 to 100% ±5.0%

Relative Humidity

20 to 80% ±3.5%

-40 to 32oF and 104oF to 158oF

-40 to 0oC and +40 to +70oC

±3.6oF/±2oC

Temperature

32oF to104oF/0oC to +40oC ±1.8oF/±1oC

950 to 1050hPa Accuracy: ±0.25%FSO @ (25oC)

Repeatability: ±0.25%Max+±0.3%FSO)

Linearity/Hysteresis: ±0.24%FSO

Temperature coefficient: ±0.1%FSO

Pressure

Notes: FSO: Full Scale Output

1psi = 68.947 mbar = 0.068947 bar

1 psi = 6894.7 Pa = 68.947 hPa = 6.8947 kPa

Resolution 0.1%RH, 0.1oC/F, 0.1hPa

Data storage 10,000 measurements

Logging rate Selectable sampling interval: From 1 minute up to 18 hours

Operating temperature -35 to 80oC (-31 to 176oF)

Battery type 3.6V Lithium (1/2 AA) (SAFT LS14250, Xeno XL050F or equivalent)

Battery life 1 year (typ.) depending on logging rate, ambient temperature, & use of Alarm LEDs

Dimensions/Weight 101x25x23mm (4x1x.9”) / 172g (6oz)

This Manual: http://www.manuallib.com/file/2691517

RHT50 V2.1 04/12

Battery Replacement

It is highly recommended that the battery be replaced every 12 months, or prior to logging critical data.

The RHT50 does not lose its stored readings when the battery weakens or when the battery is replaced; the data

logging process will however be stopped and cannot be re-started until the battery has been replaced and the

logged data has been downloaded to PC.

Use only 3.6V lithium batteries. Before replacing the battery, remove the datalogger from the PC. Follow

diagrammatic steps below.

NOTE: Leaving the RHT50 plugged into the PC USB port longer than necessary will cause some of the battery

capacity to be lost.

WARNING: Handle lithium batteries carefully, observe warnings on battery casing. Dispose of in

accordance with local regulations.

You, as the end user, are legally bound (EU Battery ordinance) to return all used batteries,

disposal in the household garbage is prohibited! You can hand over your used batteries /

accumulators at collection points in your community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the end of its

lifecycle

This Manual: http://www.manuallib.com/file/2691517

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