Reed Instruments LM-81HT User manual

Thermo-
Hygrometer
Instruction
Manual
LM-81HT
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

2
Table of Contents
Introduction ................................................................................................... 2
Product Quality.............................................................................................. 2
Safety ............................................................................................................ 3
Features......................................................................................................... 3
Included......................................................................................................... 3
Specications................................................................................................ 4
Instrument Description .................................................................................. 5
Operating Instructions................................................................................... 6
Data Hold ................................................................................................. 6
Recording Maximum and Minimum Readings ......................................... 6
Auto Power Off......................................................................................... 6
Battery Replacement..................................................................................... 7
Accessories and Replacement Parts ............................................................ 7
Applications................................................................................................... 7
Product Care ................................................................................................. 7
Product Warranty .......................................................................................... 8
Product Disposal and Recycling ................................................................... 8
Product Support............................................................................................ 8
Introduction
Thank you for purchasing your REED LM-81HT Thermo-Hygrometer. Please
read the following instructions carefully before using your instrument. By
following the steps outlined in this manual your meter will provide years of
reliable service.
Product Quality
This product has been manufactured in an ISO 9001 facility and has
been calibrated during the manufacturing process to meet stated product
specications. If a certicate of calibration is required please contact the
nearest authorized REED distributor or authorized Service Center. Please
note an additional fee for this service will apply.
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

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Safety
Never attempt to repair or modify your instrument. Dismantling your product,
other than for the purpose of replacing batteries, may cause damage that will
not be covered under the manufacturer's warranty. Servicing should only be
provided by an authorized service center.
Features
• Compactandlightweight
• DualLCDdisplay
• Userselectable°F/°C
• DataHoldandMin/Maxfunction
• Lowbatteryindicatorandautoshut-off
Included
• WristStrap
• Battery
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

4
Specifications
Temperature
MeasuringRange: 32to122°F(0to50°C)
Accuracy: ±2.5°F(1.2°C)
Resolution: 0.1°F/°C
Humidity
Measuring Range: 10 to 95% RH
Accuracy: ±5% RH
Resolution: 0.1% RH
General Specifications
Display: Dual Display, LCD
Data Hold: Yes
Min: Yes
Max: Yes
AutoShut-Off: Yes(after10minutes)
Low Battery Indicator: Yes
Power Supply: 9V Battery
Product Certications: CE
OperatingTemperature: 32to122°F(0to50°C)
StorageTemperature: 14to140°F(-10to60°C)
Operating Humidity Range: 10 to 80%
Dimensions: 6.1x2.4x1.3"(156x60x33mm)
Weight: 5.6oz(160g)
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

5
Instrument Description
1.RH/TemperatureSensor
2. LCD Display
3. Power Button
4.°C/°FButton
3
4
5
6
7
8
LM-81HT
5. Wrist Strap
6.BatteryCompartment/Cover
7. Hold Button
8.MAX/MINButton
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

6
Operating Instructions
1. Turn the instrument on or off by pressing the POWER button.
2. When powered on the reading value of relative humidity and temperature
will be displayed on the LCD display.
3. Pressing the °C/°Fbuttonwilltogglebetween°Cand°F.
Note:Whenthemeterisexposedtoanewenvironment,afewminutes
are required to allow the sensor to stabilize.
Data Hold
1. While taking a measurement, press the HOLD button to freeze the
current readings on the display.
2. Whileinthismodea"HOLD"symbolwillappearontheLCD.
3. Press the button again to resume normal operation.
Recording Maximum and Minimum Readings
1. Press the MAX/MIN button to enter recording mode as indicated by
"REC"ontheLCD.Themeterwillnowbeginrecordingmaximum
and minimum readings.
2. While in recording mode;
A) PresstheMAX/MINbuttononceandthemaximumvaluewill
appearonthedisplayasindicatedby"RECMAX".
B) PresstheMAX/MIN button again and the minimum value will
appearonthedisplayasindicatedby"RECMIN".
C) Toexitrecordingmodeandresumenormaloperation,pressand
hold the MAX/MIN button for two seconds.
Note: When in recording mode the POWER button is disabled and the
meter cannot be turned off.
Auto Power Off
To preserve battery life, the meter is programmed to turn off after
10 minutes of inactivity.
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

7
Battery Replacement
When the low battery icon appears on the left corner of LCD display, you
will need to replace the battery. Remove the battery cover using a Phillips
head screwdriver, insert a new 9V battery and secure the cover.
Accessories and Replacement Parts
CA-52A Soft Carrying Case
Don't see your part listed here? For a complete list of all accessories and
replacement parts visit your product page on www.reedinstruments.com.
Applications
• Environmentalstudies
• Fooddistribution
• HVAC/Rsysteminstallation
• Greenhousesandindustrialspaces
• Saunas
• Humidors
• Museums
• LabMonitoring
Product Care
To keep your instrument in good working order we recommend the following:
• Storeyourproductinaclean,dryplace.
• Changethebatteryasneeded.
• Ifyourinstrumentisn'tbeingusedforaperiodofonemonthorlonger
please remove the battery.
• Cleanyourproductandaccessorieswithbiodegradablecleaner.Donot
spraythecleanerdirectlyontheinstrument.Useonexternalpartsonly.
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

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Product Warranty
REED Instruments guarantees this instrument to be free of defects in
materialorworkmanshipforaperiodofone(1)yearfromdateofshipment.
During the warranty period, REED Instruments will repair or replace, at no
charge, products or parts of a product that proves to be defective because
of improper material or workmanship, under normal use and maintenance.
REED Instruments total liability is limited to repair or replacement of the
product. REED Instruments shall not be liable for damages to goods,
property, or persons due to improper use or through attempts to utilize the
instrumentunderconditionswhichexceedthedesignedcapabilities.In
order to begin the warranty service process, please contact us by phone at
1-877-849-2127 or by email at [email protected] to discuss the
claim and determine the appropriate steps to process the warranty.
Product Disposal and Recycling
Please follow local laws and regulations when disposing or recycling your
instrument. Your product contains electronic components and must be
disposed of separately from standard waste products.
Product Support
If you have any questions on your product, please contact your authorized
REED distributor or REED Instruments Customer Service by phone at
1-877-849-2127 or by email at [email protected].
Please visit www.REEDINSTRUMENTS.com for the most
up-to-date manuals, datasheets, product guides and software.
Product specifications subject to change without notice.
All rights reserved. Any unauthorized copying or reproduction of
this manual is strictly prohibited without prior written permission
from REED Instruments.
REED Instruments
1-877-849-2127 | [email protected] | www.reedinstruments.com

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