Extech Instruments 445582 Manuel utilisateur
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User's Guide
Hygro-Thermometer Pen
Model 445580 and 445582 (kit)
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
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 122oF (0 to 50oC). Advanced features include MIN/MAX Memory, Push-button
Calibration, Display Hold, and Automatic Power Off. The Model 445582 kit version
includes Relative Humidity Calibration bottles and hard shell carrying case in addition to
the Hygro-Thermometer Pen.
Specifications
Relative Humidity Sensor High Precision thin-film capacitance type
Temperature Range 14 to 122oF (-10 to 50oC)
Relative Humidity Range 10 to 90% Relative Humidity
Resolution Temperature: 0.1o; Relative Humidity: 0.1%
Accuracy (32 to 122oF & 0 to 50oC) Temperature: ±1.8oF (±1.0oC); RH: ±5%
Power 2032 button battery (150 hour battery life)
Response time 120 seconds
Dimensions 6.9 x 1.6 x 0.6" (175 x 42 x 16mm)
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech 445580 Product Page
Operation
Press the ON/OFF button to turn the meter ON. After a 5 second initialization, the Relative
Humidity reading will appear in the upper display and the Temperature reading will appear
in the lower display. Allow time for measurement readings to stabilize when moving the
meter from one area to another.
Displayed Error Messages
An error message will appear on the display if the meter fails an internal diagnostic test.
E2: Calibration error. Recalibration is necessary.
E5: Relative Humidity sensor failure. Repair/replacement is necessary.
Data Hold
1. Press the HOLD button to freeze the displayed reading. The display icon ‘HLD’ and the
held reading will appear on the display.
2. To return the meter to the normal operation mode, press and hold the RESET button
until the ‘HLD’ icon switches off.
MIN-MAX Memory
1. Press and hold the MIN/MAX button until ‘MIN’ appears in the display. The reading will
then represent the lowest humidity and temperature measurements recorded since the
meter was turned on or last reset.
2. Press and hold the MIN/MAX button until the ‘MAX’ appears on the display. The
reading will then represent the highest humidity and temperature measurements
recorded since the meter was turned on or last reset.
3. Press the MIN/MAX key again to return to normal operation.
4. To reset (clear) the MIN/MAX memory, press and hold the RESET button until ‘88.8’
appears in the display.
Automatic Power OFF (Sleep mode)
The meter will automatically shut off after a period of approximately 20 minutes. To defeat
this mode, press and hold the MIN/MAX button while turning the meter on. Release the
ON/OFF button after the display initializes. 'n' will appear on the display indicating that the
non-sleep mode has been activated. Note that Sleep mode will be re-activated when the
meter is turned off.
Selecting Temperature Units (C or F)
Caution: Follow this procedure carefully. Accidentally pressing the RESET button during this
procedure will compromise the meter's calibration.
1. Ensure that the meter is off.
2. Press and Hold the recessed F/C button (use a paper clip or similar object) and then
press the ON/OFF button. The unit will power up and the display will flash once. When
only the ‘F’ and ‘C’ icons appear together in the display, release the F/C button.
3. The display will then show either ‘C’ or ‘F’. Press the MIN/MAX key to select degrees
‘C’ or ‘F’. The display will reflect the change.
4. Press the recessed F/C button to store the selection. ‘S’ will appear in the display.
5. The display will then show ‘%MIN’. Turn off the meter to complete the operation.
Test Equipment Depot, 99 Washington Street, Melrose, MA 02176
781.665.1400 | 800.517.8431 | Fax: 781.665.0780
Calibration and Verification Procedures
The following procedures require 33% & 75% RH references available through Extech.
Verification (Checking the 33% or 75% RH Calibration)
Skip the verification and go directly to the Cal procedure below if it has already been
determined that the meter calibration is compromised or if the E2 display appears.
1. Insert meter’s sensor into the 33% or 75% salt reference bottle
2. Place the meter and bottle inside the meter case
3. Wait 40 minutes and then check if the reading is within the published specifications
Relative Humidity Calibration (33% and 75%)
For best results, store the meter and salt bottles in the closed case during the 40-minute
stabilization process. The 33% and the 75% calibrations must both be performed.
1. Start with the meter OFF.
2. Insert the meter’s sensor into the 33% salt reference bottle. Put the
meter and the bottle in the case and close the case. Allow the meter to
stabilize for 40 minutes. Note that for diagnostic purposes the
stabilization process can be shortened to 5 minutes.
3. Open the case but leave the pen in the bottle. While holding down the
recessed CAL button with a paper clip, press and release the ON-OFF button.
Continue to hold down the CAL button, the unit will turn ON and the display will flash
once.
4. When only the Fand Cicons appear, release the CAL
button. After releasing the CAL button, the display will
indicate either For C(depending on which one was
selected).
5. Press and hold the RESET button for 3 seconds. %MIN will appear in
the display after the RESET button is released.
6. Press and release the CAL button. ‘S’ will briefly
display followed by %MAX display.
7. Turn the meter OFF. Insert the meter sensor into the
75% salt reference bottle. Put the meter and the bottle in the case and close the case.
Wait 40 minutes.
8. Open the case but leave the pen in the bottle. While holding down the recessed CAL
button with a paper clip, press and release the ON-OFF button. Continue to hold down
the CAL button, the unit will turn ON and the display will flash once.
9. When only the Fand Cicons appear, release the CAL
button. After releasing the CAL button, the display will
indicate either For C.
10. Press and hold the RESET button for 3 seconds. %MIN will appear in
the display after the RESET button is released.
11. Press and hold the RESET button again for 3 seconds. %MAX will
appear after the key is released.
12. Ensure that %MAX is displayed and
then press CAL. ‘S’ will appear briefly
and the meter will return to normal
operation. Turn the power OFF;
calibration is complete.
Test Equipment Depot, 99 Washington Street, Melrose, MA 02176
781.665.1400 | 800.517.8431 | Fax: 781.665.0780
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