UEi Test Instruments DT20A - Manual (Page 2)

Button Response/Display
On/Off Turns instrument on (Default setting) and off.
Three beeps emitted at power up.
MIN/MAX Press once and the display indicates MIN.
You are now able to change scales to display
minimum in degrees F or C, and on the DT20A you
are able to cycle through T1-T2 options.
Press a second time to display MAX – You have
the same display
Press again to return to real time readings.
Back Light Press momentarily to activate or turn off the
backlight.
Hold Press momentarily to hold all readings. This also
stops the recording of Min/Max values.
Hold down while turning unit on to disable auto
power off. Confirmed with one solid tone.
˚F / ˚C Press momentarily and the unit toggles between
Fahrenheit (the default) and Celsius temperatures.
The current mode is indicated on the right side of
the LCD.
T1/T2 (DT20A Only) Press momentarily to display
T1-T2 on the lower display with T1 on the
upper display.
Press again to display T1-T2 on the lower display
with T2 on the upper display.
Pressing a third time will return the display to T1
on the upper display and T2 on the lower display.
MAINTENANCE
Cleaning
Use a damp cloth and mild soap to clean the case of your ther-
mometer. Do not use harsh detergents or abrasives as these
may mar the finish or damage your unit’s case with an adverse
chemical reaction.
Do not allow moisture to directly contact the temperature probe
jacks, or enter the instrument’s housing. Remove the instrument
from its boot to ensure moisture is not trapped during cleaning.
Replacing the battery
Replace your (3) AAA alkaline batteries when:
• The display begins to blink on and off
• The instrument will not power on
• Use of the back-light causes the display to blink
Even if the batteries were recently replaced, check their volt-
age level if you get no response from your instrument. Remove
batteries from instruments that you do not plan to use for a
month or more. Do not leave batteries in instruments that may
be exposed to temperature extremes.
Dispose of batteries in accordance with local land use regula-
tions.
To replace the batteries:
1. Remove the temperature probes from the top of
the instrument
2. Remove the rubber boot, by sliding the instrument
out toward the top faceplate cut-out
3. Lay the instrument facedown on a clean, flat surface.
4. Remove the battery cover by sliding it straight down.
5. Remove and replace the batteries, observing
indicated polarity.
Calibration
To ensure your instrument is performing at its peak, send it to
the UEi factory or a qualified instrument calibration facility for
annual calibration.
TROUBLESHOOTING
This instrument contains no user serviceable parts beyond
those listed in this table. In the event your instrument is physi-
cally damaged or does not function properly after taking the
listed action, please return the instrument to UEi following the
warranty and service instructions.
SPECIFICATIONS
Replacement Parts
Batteries: Three Standard AAA (NEDA 24A, IEC LR03)
Alkaline recommended
Temperature Probes: ATT55A thermistor probe immersion style
Optional Accessories
Probes: ATT56A Air probe
ATT57A Surface probe
AC319 Soft Carrying Case
Operating Conditions
32 to 122 °F (0 to 50 °C) at 0 to 85 % relative humidity
(non-condensing)
WARRANTY AND SERVICE
DT15A/DT20A Warranty
Your thermometer is warranted to be free from defects in
material and workmanship for a period of three years from the
date of
purchase. If, within this warranty period, your thermometer
should become inoperative from such defects, the instrument
will be
repaired or replaced at UEi’s option. This warranty does not
cover batteries, misuse, abuse, alteration, tampering, neglect,
or improper maintenance, or damage resulting from leaking
batteries. Proof of purchase is required for warranty repairs.
Service Information
Service covered under warranty will be provided at no charge.
Instruments out of warranty will be repaired, (when repairable)
for a service charge. Return the unit postage paid and insured
to:
UEi Service Department
8030 SW Nimbus • Beaverton, Oregon 97008
To receive a free catalog containing our full line of test and
measurement products, call (503) 644-8723. Visit our full-feature
web site at ueitest.com.
Auto power
off defeat
Hold function suspends
capture of MIN/MAX
values
Allow 5 seconds after
power-on for data to
show up on screen
Instrument turns
off during
recording
Probes
Time Delay
Dashes appear
in data screen
Insert missing Probes
Dashes appear
during review
of maximum
recorded value
Follow procedures
outlined in Operating
Instructions
Hold function
activated
Check for intermittent or
momentarily removed
temperature probe
Replace low batteries
Battery
voltage
Instrument does
not turn on
If I See This
Malfunction
I Should
Check For
Then Take This Corrective
Action
Battery
Polarity
Ensure batteries are
installed as shown in battery
compartment
Open Probe
Minimum or
Maximum value
not captured
Specifications are for operating temperatures between 64 and 77 °F (18 to 25 °C).
Specifications valid for 1 year after calibration.
Range Resolution Accuracy
-50 to -20 °F / °C
-19.9 to 199.9
°F / °C
200 to 571 °F
200 to 300 °C 1°
1°
1°
0.1° ± 1%
± 1.5 °F / °C
GENERAL SPECIFICATIONS
H x W x D
Weight
Thermistor
5.5” x 3” x 1.25”
.44 lbs.
100k