EXTECH INSTRUMENTS 445815 Humidity Alert II User's Guide

User’s Guide

Model 445815 Humidity Alert II Humidity Indicator with Dew Point and Programmable Hi/Lo %RH Alarms CC Introduction Operation Calibration Congratulations on your purchase of Extech’s Humidity Alert II Remote Probe Preparation for use RH Calibration Hygro-Thermometer. Humidity alarms warn when the %RH exceeds a pre-set HI Open the battery compartment by pushing the cover on the rear of the 1. Insert meter’s sensor into a salt reference bottle or humidity chamber. The or LO limit. The remote probe conveniently mounts on the meter or extends for instrument downward as indicated by the arrow. Remove the battery insulating reference should be >70% RH. measurements in ducts or remote locations. It also features Humidity and strip and the protective film cover on the LCD display. 2. Check the reading after 1 hour. Temperature adjustments. The unit can be wall-mounted or placed on a flat

Temperature Units 3. Adjust the RH calibration pot in ½ turn increments, waiting for the display to

surface using the fold-out stand. This professional meter, with proper care, will

update after each adjustment, until the reading is within the accuracy

Select ºF or ºC units using the rear selection switch.

provide years of safe reliable service.

specification.

Audible alarm

Meter Description Temperature Calibration

Select or using the rear selection switch to turn the audible alarm on or

1. Place the sensor in a stabilized environment of approximately 21°C.

1. Temperature-Humidity Sensor

2. Check the reading after 1 hour.

Maximum / Minimum display

2. %RH Display

3. Adjust the temperature calibration pot in ½ turn increments, waiting for the

3. Dew Point Display 1. Press the MAX/MIN button. The highest value measured since the Reset

display to update after each adjustment, until the reading is within the

button was last pressed appears on the display.

4. Temperature Display accuracy specification.

5. %RH LED alarm 2. Press the MAX/MIN button again to display the lowest value measured since

Battery Replacement

the Reset button was last pressed.

6. Max/Min push button

3. Press the MAX/MIN button again to return to normal display operation. Open the battery compartment by sliding the battery cover on the rear of the

7. Reset push button

instrument downward as indicated by the arrow. Replace the 1.5V ‘AAA’ batteries

8. Sensor cable storage Resetting (clearing) the MAX/MIN memory

and replace the cover.

9. Tilt Stand 1. Press the MAX/MIN button to enter the MAX/MIN mode.

You, as the end user, are legally bound (Battery ordinance) to

10. Humidity calibration adjust 2. Press and hold the RESET button for 1 second to clear the memory and

return all used batteries and accumulators; disposal with the

11. Temperature units switch (ºF/ºC) start recording new max/min values.

household garbage is prohibited!

12. Temperature calibration adjust Setting the %RH Alarm Limits.

You can hand over your used batteries / accumulators,

13. Wall hanger

1. Simultaneously Press and HOLD the MAX/MIN and RESET button until “HI” gratuitously, at the collection points for our branches in your

14. Battery compartment and the stored HI %RH limit appears flashing.

community or wherever batteries / accumulators are sold!

15. Audible Alarm ON/Off switch

2. Press the RESET button to set the Hi %RH limit. Hold the button in for rapid

Disposal: Follow the valid legal stipulations in respect of the

Cautions adjustment.

disposal of the device at the end of its lifecycle

3. Press the Max/Min button. “LO” and the stored LO %RH limit will appear

• This device is not a toy and must not reach children’s hands. It contains

flashing

hazardous objects as well as small parts that the children could swallow. In

Specifications

case a child swallows any of them, please contact a physician immediately 4. Press the RESET button to set the LO %RH limit. • Do not leave batteries and packing material lying around unattended; they 5. Press the Max/Min button to turn on or off the alarm. The alarm icon will Range Accuracy can be dangerous for children if they use them as toys appear in the display when the alarm is active.

Temperature -10 to 60o C + 1.0o C within -10o C to 50o C

6. Press and hold the RESET button to save the settings and exit the mode.

• In case the device is going to be unused for an extended period of time, 14 to 140o F + 1.8o F within 14o F to 122o F

remove the batteries to prevent them from training Alert

Humidity 10% to 99% + 4% RH within 25% to 85% RH and 0 to

• Expired or damaged batteries can cause cauterization on contact with the If %RH exceeds the HI limit or goes below the LO limit the alert will be 50o C or 32 to 122o F skin. Always, therefore, use suitable hand gloves in such cases activated. The alert consist of two flashing ‘ALERT” icons in the upper display,

Dew Point -36 to 60o C +/-2o C. @ 20o C

a flashing red light (for 60 seconds) and an audible buzzer (for 60 seconds)

• See that the batteries are not short-circuited. Do not throw batteries into the

-32.8 to 140o F +/-3.6o F @ 68o F

fire.

Battery (2) 1.5V 'AAA' cell Weight 6 oz (169g)

Copyright © 2005 Extech Instruments Corporation. All rights reserved including

the right of reproduction in whole or in part in any form. Dimensions Display: 4.3x3.9x0.8” (109x99x20mm)

www.extech.com

Probe: 0.57” (14.4mm) Dia.: 1.67”(42.4mm) L

Cable length 18” (457mm)

Note: If subjected to an electrostatic discharge the meter may malfunction and require the user to perform a reset.