
INSTRUCTION MANUAL
DT221/222
T1
K
Digital Thermometer
75.9
DT221
°
f
T1
K
T2
K
Digital Thermometer
75.9
76.1°f
DT222
°
f
Digital Thermometers
1-800-547-5740 • Fax: (503) 643-6322
www.ueitest.com • Etmail: info@ueitest.com

1. Introduction ........................................................................1
2. Features .............................................................................1
3. Material supplied ..............................................................1
4. LCD display ........................................................................2
5. Warning .............................................................................2
6. Keypad (Controls) ...............................................................2
7. Operation ...........................................................................4
(1) Power On / Off ..................................................................4
(2) Auto power off ..................................................................4
(3) Set thermocouple type ......................................................4
(4) Taking measurement .........................................................5
(5) Change unit (°C/°F ) .......................................................... 5
(6) Change mode (T1-T2/REL or K / J) ...................................6
(7) MAX / MIN / AVG .............................................................7
(8) Data hold ...........................................................................7
(9) Backlight ............................................................................8
8. Specifications ....................................................................8
9. CE Certificate .....................................................................8
10.Trouble shooting ................................................................9
11.Battery replacement and end of life..................................9
12.Warranty. ...........................................................................10

INTRODUCTION
Thank you for purchasing the UEi DT221 single input DT222
dual input K and J type digital thermometer. This thermometer
features a built-in microprocessor and high resolution analog
to digital converter chip. The thermocouple probe responds
very quickly to a wide range of temperature measurements.
The industry standard mini thermocouple jack accepts a wide
selection of probe types.
1) Auto power off with disable feature (60 minutes).
2) Single (DT221) or dual input (DT222).
3) Large LCD screen.
4) Bright back-lit display
5) Complete with bead wire temperature probes and 9V battery
6) ˚C/˚F select function.
7) REL mode to observe temperature changes
8) Differential (T1-T2) on DT222
MATERIAL SUPPLIED
• Meter
• 9V battery
• Operation manual
• DT221 J-type probe with clip
• DT222 K-type bead probe (2)
FEATURES
1

LCD DISPLAY
1
2
1. Primary LCD: Display T1 (1st thermocouple reading)
2. Secondary LCD: Display T2 (2nd thermocouple on differential or
intitial valve for relative mode.)
WARNING
1. Always connect thermocouple before turning the unit on
for most accurate readings
2. Make sure to plug sensor with correct polarity. Do not
be alarmed if erratic readings appear on display prior to
normal mode.
UNIT
HOLD
KEYPAD (CONTROLS)
Press “UNIT” to select ˚C/˚F.
Freeze display
2