Extech 44550 Operating 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

o

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

o

Temperature resolution

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.

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.

o

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

o

Temperature resolution

User Guide

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.

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 on 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
[phone] ext. 210 for authorization or visit our website at www.extech.com (click on
‘Contact Extech’ and go to ‘Service Department’ to request an RA number). A Return
Authorization (RA) number must be issued before any product is returned to Extech. The
sender is responsible for shipping charges, freight, insurance and proper packaging to prevent
damage in transit. This warranty does not apply to defects resulting from action of the user
such as misuse, improper wiring, operation outside of specification, improper maintenance or
repair, or unauthorized modification. Extech specifically disclaims any implied warranties or
merchantability or fitness for a specific purpose and will not be liable for any direct, indirect,
incidental or consequential damages. Extech's total liability is limited to repair or replacement
of the product. The warranty set forth above is inclusive and no other warranty, whether
written or oral, is expressed or implied.

All rights reserved including the right of reproduction in whole or in part in any form.

• CLEAR Key

Copyright © 2002 Extech Instruments Corporation.

Website: www.extech.com Email: [e-mail] Rev 1.0 9/02

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.

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 on 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
[phone] ext. 210 for authorization or visit our website at www.extech.com (click on
‘Contact Extech’ and go to ‘Service Department’ to request an RA number). A Return
Authorization (RA) number must be issued before any product is returned to Extech. The
sender is responsible for shipping charges, freight, insurance and proper packaging to prevent
damage in transit. This warranty does not apply to defects resulting from action of the user
such as misuse, improper wiring, operation outside of specification, improper maintenance or
repair, or unauthorized modification. Extech specifically disclaims any implied warranties or
merchantability or fitness for a specific purpose and will not be liable for any direct, indirect,
incidental or consequential damages. Extech's total liability is limited to repair or replacement
of the product. The warranty set forth above is inclusive and no other warranty, whether
written or oral, is expressed or implied.

All rights reserved including the right of reproduction in whole or in part in any form.

Copyright © 2002 Extech Instruments Corporation.

Website: www.extech.com Email: [e-mail] Rev 1.0 9/02