Extech Instruments 445580 User Manual

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User's Guide
Hygro-Thermometer Pen
Model 445580
Introduction
Congratulations on your purchase of the Extech Hygro-Thermometer Pen Model 445580. The
445580 can measure Relative Humidity from 10% to 90% and Temperature from 14 to 122
o
F (0 to
50
o
C). Advanced features include MIN/MAX Memory, Push-button Calibration, Display Hold, and
Automatic Power Off.
Meter Description
1. Humidity/Temperature Sensor
2. POWER ON/OFF button
3. Data HOLD button
4. MIN/MAX Memory button
5. Calibration and units select button
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

Extech Instruments 445580 Specifications

General

Resolution Temperature	0.1°F/°C
Resolution Humidity	0.1%RH
Power Source	9V battery
Distance to Spot Ratio	12:1
Accuracy Humidity	±3%RH
Emissivity	0.1 to 1.0 (adjustable)
Display	Dual LCD

Summary

Introduction

Meter Description

Humidity/Temperature Sensor

Locates the sensor responsible for measuring humidity and temperature.

POWER ON/OFF Button

Describes the button used to turn the meter on and off.

Data HOLD Button

Explains the function of the button to freeze the displayed reading.

MIN/MAX Memory Button

Details the button for accessing minimum and maximum recorded values.

Calibration and Units Select Button

Identifies the button for calibration and unit selection.

Operation

Displayed Error Messages

Lists and explains error codes such as E2 and E5.

Data Hold

Instructions for freezing and resuming displayed readings.

MIN-MAX Memory

Procedure for recording and recalling minimum and maximum values.

Automatic Power Off (Sleep mode)

Details the auto shut-off feature and how to disable it.

Selecting Temperature Units (C or F)

Guide for changing between Celsius and Fahrenheit temperature units.

Calibration and Verification Procedures

Verification (Checking the 33% or 75% RH Calibration)

Procedure for verifying the meter's calibration accuracy.

Relative Humidity Calibration (33% and 75%)

Step-by-step guide for calibrating the humidity sensor.

Battery Replacement

Specifications