UEi Test Instruments DT20A - Manual

DT15A/DT20A
Instruction Manual
INTRODUCTION
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Congratulations on your purchase of this thermometer by UEi!
This instrument is a portable, battery operated temperature-
measuring device. It uses thermister probes to provide fast,
accurate measurements with excellent resolution.
Materials Supplied
This package contains:
• The DT15A or DT20A temperature tester
• An impact resistant rubber boot
• ATT55A thermistor probe (two probes included with DT20A)
• Installed batteries
• This instruction manual
SAFETY
Practicing Safety
This instrument is designed for professionals who know the
hazards associated with their trade. While the opportunity to
injure yourself as a direct result of operating this instrument is
nearly non-existent, the equipment you are servicing, as well as
the environment you’re
working in, can be hazardous. These are a few common safety
practices for those working around temperature critical
environments:
• Follow the manufacturer’s maintenance procedures when
servicing equipment
• Place ONLY thermistor probes in the jacks
• Be sure the probe you are using can withstand the tempera-
ture extreme it may be exposed to in your service task
• Properly maintain your thermometer and calibrate it regularly
CONTROLS AND INDICATORS
Key:
1. Power Switch - Powers instrument on and off
2. Min/Max – Displays the captured minimum and maximum
values for all parameters.
3. Back Light Switch - Powers back light on and off
4. Hold Switch - Freezes screen data
5. °F/°C Mode Select Switch - Toggles display data from
degrees Celsius to degrees Fahrenheit.
6. T1-T2 Switch (DT20A only) - Toggles screen information
between T, T2, and T1-T2.
7. Thermistor Ports – 1/8” mini jack plugs for the thermistor
probes used; T1 on the left T2 on the right for DT20A
8. LCD Display – Display screen of function and
data information
9. Second Display (DT20A only) – Display of T2 or T1-T2 data
OPERATING INSTRUCTIONS
Functional Description
The meter will momentarily flash all LCD segments on the
display when it is first turned on, emit four quick beeps then
it will go blank for approximately 3 seconds before starting
operation. The instrument will only provide information with
probes plugged in.
The DT15A has a single screen of information to view the
temperature in °F or °C, recorded minimum or maximum, or
held value.
The DT20A has a split screen to view both T1 and T2, or
T1-T2 and your choice of either T1 or T2. The choices for
format are the same as with the DT15A. Numerous viewing
combinations are available to ensure you get the information
you need.
• Min/Max function starts when the meter is powered on,
and continues to capture values while operating with
probes connected
• Temperature readings are easily toggled between Fahren-
heit and Celsius
• The back light illuminates the LCD for viewing in low light
areas
• The HOLD button will freeze the display data and suspend
the Min/Max function
• The display will begin to blink when battery voltage is low.
Note: If no probes are plugged in, three dashes will appear in
the temperature data screens. This will also be recorded as a
Max until the power is switched off then back on.
This instrument operates and updates silently.
Auto Power Off
This instrument will shut off automatically in approximately 60
minutes. For recording or operating over longer periods of
time you can defeat the auto power off function by holding
down the hold button while turning the unit on. The unit will
start with one solid beep to indicate that auto power off func-
tion is not activated.
Mode Options
When the instrument is initially turned on, the Primary screen
displays T1 and the Secondary screen displays T2 (DT20A).
The following table lists the modes of operation that can be
invoked by pressing the buttons indicated. The table assumes
your instrument has been powered on with temperature
probe(s) installed:
— Continued on reverse —
DT15A/DT20A Controls
DT20A shown. DT15A does not have dual display or T1-T2 button.
DT15A/DT20A MAN 9/01
3
4
5
6
8
1
2
7
9