Extech Extech 44550 Manual

Humidity / Temperature Pen – Model 44550

Features

• Measures Relative Humidity from 20 to 90%

• Measures Temperature from 14 to 122

units

• Built-in Resistive sensor for Relative Humidity measurements

• Built-in Thermistor sensor for Temperature measurements

• Max/Min record and recall of high and low temperature and humidity

measurements

• CLEAR function key erases recorded readings

• Digital Display with 1% Relative Humidity and 0.1

• Complete with pocket clip and one (1) LR-44 button battery

Instructions

• ON/OFF Key

Press the ON/OFF key to turn the Pen On or Off.

• C/F Key

Press the C/F Key to select the temperature units.

• MAX/MIN Key

Press the MAX/MIN key once to view the highest temperature and relative
humidity readings. An up arrow ▲will appear on the left side of the display to
indicate that the MAX mode is active.
Press the MAX/MIN key a second time to view the lowest temperature and
humidity readings. A down arrow ▼will appear on the left side of the display
to indicate that the unit is in the MIN mode.
Press the MAX/MIN key a third time to exit the MAX/MIN mode and return to
normal operation.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

o

F (-10 to 50o C) with switchable oC/oF

o

Temperature resolution

FAX [phone] - TestEquipmentDepot.com

User Guide

• CLEAR Key

With the down or the up arrow visible on the display (indicating that the Pen is
in the MAX/MIN mode), press the CLEAR key to erase the stored MAX/MIN
temperature and relative humidity readings. When the readings have been
erased the display will indicate all dashes ( - - -- - ). New MAX/MIN readings
will start recording within 3 seconds of the Clear function.-+

Battery Replacement

1. Using a coin or a screwdriver, open the circular battery compartment on the

rear of the pen by turning it in the direction of the OPEN arrow.

2. Replace the LR-44 battery and dispose of the used battery responsibly.

3. Close the battery compartment by turn the compartment cover in the direction

of the CLOSE arrow.

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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