Owner's manual

C o n t r ols and Indicators

1. USB: Connects to a USB port on a computer.

2. Start Button: Activates datalogger.

3. Alarm LED: Illuminates red or yellow.

4. Record LED: Illuminates green.

5. RH and Temperature Sensors

6. Slot to Open Battery: Refer to battery replacement.

Introduction

Use the UEi THL1 to log temperature and humidity values for later

analysis. Verify cold storage requirements are being met, or test temper-

atures and humidity for comfort analysis.

Features include

• 32,000 data points (16,000 Temperature, 16,000 Relative Humidity)

• Analysis software with dew point calculation, charting of results,

and export to other file formats

• USB interface and Windows™ compatible

• Instant or manual start

• Alarm LED’s with user selectable values

• Magnetic mount

• Long battery life

Operating Instructions

LEDs Indication Description Action

Both LED lights off Not logging Start logging

Low battery Replace battery and download data

One Green flash every 10 seconds* Logging - No alarm**

Double Green flash every 10 seconds* Not logging - in Manual Start Mode Press “START” to begin logging

Single Red flash every 10 seconds* Logging - Low Alarm RH%***

Double Red flash every 10 seconds* Logging - High Alarm RH%***

Single Red flash every 60 seconds Low battery**** Logging will stop automatically.

Replace battery and download data

(No Data will be lost)

Single Yellow flash every 10 seconds* Logging - Low Temp Alarm***

Double Yellow flash every 10 seconds* Logging - High Temp Alarm***

Single Yellow flash every 60 seconds Logger memory full Download Data

THL1-MAN P. 1

Front

Back

REC ALM

REC

ALM

REC ALM