Dwyer THI2-10 - Manual (Page 2)

Air/Dew Point/Wet Bulb:
Press and hold to switch between air temperature, dew point (DP) and wet bulb
temperature (WBT) in normal mode.
Current/Min./Max Values:
1. Press to cycle the display between the current value, minimum value, and
maximum value.
2. Press and hold more than one second to reset the minimum and maximum
values.
Disable Automatic Shut Off:
While the meter is off, press + to turn on the meter for continuous use.
Calibration:
1. To turn off the meter, plug the meter probe into a 32.8% salt bottle and hold the +
key for more than one second to turn on the meter and enter calibration mode.
2. You will see 3x.x% is flashing on the LCD.
After 30 minutes, the “3x.x%” will stop flashing, meaning that the calibration is finished
and saved. You can also manually end and save the calibration by holding the key
for more than one second.
3. Move the meter probe into a 75.3% salt bottle and hold “MN/MX/RST” for more than
one second to enter the 7x.x% calibration. “7x.x% will flash on the LCD”.
4. “7x.x%” will stop flashing after 30 min. The calibration has been completed. You can
manually end and save the calibration by holding the key for more than one
second.
Troubleshooting:
MAINTENANCE/REPAIR
Upon final installation of the Model THI2-10, no routine maintenance is required. The
Model THI2-10 is not field serviceable and should be returned if repair is needed.
Field repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any
additional application notes.
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
©Copyright 2011 Dwyer Instruments, Inc. Printed in U.S.A. 8/11 FR# R6-443937-00
When the meter is on, pluging the probe into the calibration
solution will also result in “E 33” or “E 34” in max. and min. mode. NOTICE
a) Auto power off is automatically disabled during calibration
procedure.
b) In order to get a high accuracy, you must do the calibration at 23 ± 2°C (69.8 ±
3.6°F) and in a steady airflow room.
c) Once the calibration is finished, if the value differs from 7x.x% or 3x.x% for more than
.3%, it means the calibration has failed (see troubleshooting 3.)
NOTICE
Symptom
Power On But No Display
Display Disappeared
Calibration Failure
Display Message E11
Display Message E33
Display Message E34
Action
Make sure the time of pressing the key is more
than 100 ms.
Check that the batteries are in place, good contact
and correct polarity.
Replace new batteries and try again.
Move the batteries away for one minute and install
again.
Check whether the low battery indicator is on before
the display disappeared. If yes, replace with new
batteries.
Turn on the meter by pressing the + key
to disable auto power off function for long time usage.
Check whether the low battery indicator is on before
the display disappeared. If yes, replace with new
batteries.
Make sure that the sealing is good when plugging the
meter probe into the salt bottle.
Make sure the free air temperature is within 23 ±2°C
(73.4 ±35.6°F) and the airflow is stable.
RH calibration error, re-calibrate.
Circuit error in RH measurement, return the meter to
its dealer.
Circuit error in temperature measurement channel,
return the meter to its dealer.