User Guide

Humidity / Temperature Pen – Model 44550

Features

• Measures Relative Humidity from 20 to 90%

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

• 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.

User Guide

Humidity / Temperature Pen – Model 44550

Features

• Measures Relative Humidity from 20 to 90%

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

• 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.

• 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

(781) 890-7440 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.

Copyright © 2002 Extech Instruments Corporation.

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

Rev 1.0 9/02

• 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

(781) 890-7440 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.

Copyright © 2002 Extech Instruments Corporation.

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

Rev 1.0 9/02