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1-800-547-5740 • Fax: (503) 643-6322
www.ueitest.com • email: info@ueitest.com
DTH30
INSTRUCTION MANUAL
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Introduction
The DT H 30 Digital Psychrometer/Hygrometer allows you to ca r ry a
pocket-sized psychrometer everywhere. You can set cooling systems
at a specific superheat or subcooling temperatures, using actual wet
and dry bulb measurements and factory charts. This replaces the sling
psychrometer with an accurate and easy to use digital instrument.
Features include
• Measures ambient temperature in ˚F or ˚C
• Measures relative humidity 0 to 99.9% RH
• Calculates dew point and wet bulb temperatures
• MAX capture allows you to record and display maximum and
minimum values
• Auto power-off saves batteries
• Data hold and MIN/MAX allows you to review all measured values
Safety Notes
Before using this instrument, read all safety information carefully. In
this manual the word "WARNING" is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION" is used to indicate conditions or actions that may
damage this instrument.
International Symbols
C o n t rols and Indicators
1. ON/OFF - Power Switch: Turns the DT H 30 on and off.
2. HOLD - Data Hold: Freezes data input.
• “HLD” appears in upper right corner of display.
• View frozen data for any of these functions: C/F,
T d / W B T, MIN / M A X .
• Cancel hold by pressing (RS T ) .
3. (C/F) - Centigrade/Fahrenheit button: Toggles between these
two standard sca l e s .
4. RST - Reset:
• When data hold is on, pressing this button cancels data hold
(resumes opera t i o n ) .
• In normal operation, pressing this button clears high and low
t e m p e ratures from memory.
5. td/WBT - Temperature at Dew Point, and Wet Bulb
Temperature: Toggle between real-time readings, dew point
measurement and wet bulb tempera t u r e .
6. MIN/MAX - Minimum/Maximum: Toggle between real-time
readings, minimum stored value and maximum stored value.
M a i n t e n a n c e
Cleaning
Periodically clean your instruments case using a damp cloth. DO NOT
use abrasive, flammable liquids, cleaning solvents, or strong detergents
as they may damage the finish, impair safety, or affect the reliability of
the structural components.
DTH30-MAN P. 1
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S p e c i f i c a t i o n s
Temperature range 0 to 788˚F (-20 to 420˚C)
Size 6 5/8” (H) x 1 7/8” (W) x 7/8” (D)
Sensor Temperature: thermocouple bead
Humidity: polymer film (capacitance)
Batteries Two (2) standard AAA
Operating Range 14 to 122˚F (-20 +50˚C)
0-100% RH
Resolution 1˚F/C, 1% RH
Accuracy:
Relative Humidity Fu n c t i o n s ±3% at 77˚F within 10 to 90% RH
±4% at any other point within the operating range
Temperature ±1˚F/C
Auto Power Off 20 minutes
Response Time Approximately 60 seconds
Update Rate Two (2) to six (6) seconds depending on function
Battery replacement
Always use a fresh replacement battery of the specified size and type.
Immediately remove the old or weak battery from the meter and
dispose of it in accordance with your local disposal regulations. Batteries
can leak chemicals that corrode electronic circuits. If your meter is not
going to be used for a month or more, remove and store the battery in
a place that will not allow leakage to damage other materials.
WARNING!
DO NOT expose your DTH30 to temperature extremes that exceed the
specified limits.
DO NOT submerge this instrument in liquid as electronic component or
sensor damage may result.
To install a new battery:
This instrument contains no user serviceable parts excluding
the batteries.
This instrument is a solid state digital device that requires no calibration,
however annual certification is recommended.
DTH30-MAN P. 2
To expose batteries,
slide cover plate down.
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Limited Warranty
The DT H 30 is warranted to be free from defects in materials and workmanship for a period of
one year from the date of purchase. If within the warra n ty period your instrument should
become inoperative from such defects, the unit will be repaired or replaced at UEi’s option.
This warra n ty covers normal use and does not cover damage which occurs in shipment or
failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. Batteries and consequential damage resulting from failed batteries are not
covered by warra n ty.
Any implied warranties, including but not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited to the express warranty. UEi shall not be
liable for loss of use of the instrument or other incidental or consequential damages,
expenses, or economic loss, or for any claim or claims for such damage, expenses or
economic loss. A purchase receipt or other proof of original purchase date will be required
before warra n ty repairs will be rendered. Instruments out of warra n ty will be repaired (when
r e p a i r able) for a service charge. Return the unit postage paid and insured to:
1-800-547-5740 • FAX: (503) 643-6322
www.ueitest.com • Email: info@ueitest.com
This warranty gives you specific legal rights. You may also have other rights which vary from
state to state.
DTH30
Digital Psychrometer/Hygrometer
Copyright © 2007 UEi DTH30-MAN 1/07
PLEASE
RECYCLE
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