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INSTRUCTION MANUAL
Model 407445
Heavy Duty Hygro-Thermometer
Introduction
Congratulations on your purchase of Extech's Heavy Duty Hygro-Thermometer. The Model
407445 displays Temperature & Relative Humidity simultaneously and includes a built-in
PC interface. This professional meter, with proper care, will provide years of safe reliable
service.
Page 1
Model 407445 Version 2.2 February 2004
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Table of Contents
Related Manuals for Extech Instruments 407445
Summary of Contents for Extech Instruments 407445
- Page 1 Heavy Duty Hygro-Thermometer Introduction Congratulations on your purchase of Extech’s Heavy Duty Hygro-Thermometer. The Model 407445 displays Temperature & Relative Humidity simultaneously and includes a built-in PC interface. This professional meter, with proper care, will provide years of safe reliable service.
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Page 2: Specifications
> 70% RH: ± 4% RH < 70% RH: ± 3% RH ο ο ο ο ο Temperature 32 F to 122 ± 1.5 F (± 0.8 ο ο C to 50 Page 2 Model 407445 Version 2.2 February 2004... -
Page 3: Meter Description
Meter Description Sensor input RS-232 serial output jack LCD Display Keypad Sensor LCD contrast adjustment Protective rubber jacket Battery compartment and calibration pots on rear Page 3 Model 407445 Version 2.2 February 2004... -
Page 4: Meter Operation
2. It may be necessary to adjust the display contrast due to a change in viewing angle or voltage drift. Use the LCD contrast adjustment located on the right side of the meter. Page 4 Model 407445 Version 2.2 February 2004... -
Page 5: Battery Replacement
2. To replace the battery: a) Remove the rubber jacket that encases the meter. b) Open the rear battery compartment using a small coin or screwdriver. c) Replace the 9V battery and re-assemble the meter. Page 5 Model 407445 Version 2.2 February 2004... - Page 6 C conditions. Allow time for the chamber and the meter sensor to stabilize (30 minutes approx.) and then adjust the appropriate potentiometer (see below): • VR7 - Temperature 21 C adjustment • VR6 - Temperature 50 C adjustment Page 6 Model 407445 Version 2.2 February 2004...
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Page 7: Calibration And Repair Services
NIST certification for most products. Call the Customer Service Department for information on calibration services available for this product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy. Page 7 Model 407445 Version 2.2 February 2004... -
Page 8: Warranty
Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.
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