UEi DT720 User manual

DT720 Digital thermometer
EXIT
ENTER
CLEAR
T1-T2
MIN/
MAX
RECALL
SETUP
HOLD
LOG
TYPE
K
T1
T1 - T2
T2
m:s
ºF
INSTRUCTION MANUAL
ENGLISH
Digital Temperature Logger
DT720
1-800-547-5740
www.ueitest.com • email: [email protected]
ISED

Table Of Contents
FEATURES ..............................................................................3
SAFETY NOTES...................................................................... 3
CONTROLS AND INDICATORS ..........................................4
LCD DISPLAY FUNCTIONAL DESCRIPTION ..................... 5
OVERVIEW ...........................................................................6-7
OPERATING INSTRUCTIONS.........................................7-12
1. Temperature units. ................................................. 7
2. Date .................................................................... 7-8
3. Time .......................................................................8-9
4. Type ....................................................................... 9
5. APO ....................................................................... 9
6. Interval ................................................................. 9
7. Offset ...................................................................10
8. Factory Reset .........................................................10
9. Exiting...................................................................... 10
Displaying Temperature...................................... 10-11
Holding the Displayed Temperature ........................ 11
Viewing the MIN/MAX/AVG Readings ..................... 11
Using the Offset to Compensate for Probe Errors ...11
How to Use Memory .................................................11
Starting and Stopping Logging .................................12
Clearing Memory ........................................................12
Viewing Logged Readings ......................................... 12
MAINTENANCE........................................................... 12-13
Periodic service......................................................12-13
Cleaning and Decontamination.................................. 13
Battery Replacement ..................................................13
SPECIFICATIONS............................................................15-16
Environmental .............................................................15
General........................................................................ 15
ATT29 K-Type Thermocouple...................................... 15
Electrical...................................................................... 16
FCC INFORMATION ......................................................... ..17
WARRANTY ........................................................................18

3
Features
• 2 channel
• Large backlit multi-parameter display
• Accepts J, K, E, T, R, S type thermocouples
• Min/Max/Avg
• Hold
• Auto Power Off
• Fahrenheit or Celsius scale
• Temperature differential mode (T1-T2)
• Time display
Safety Notes
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 thermocouples (type K, J, T, E, R, S) in the DT720
thermocouple ports
• Make sure your meter is set for the proper thermocouple type
you are using
• Be sure the thermocouple you use can withstand the
temperature extreme it may be exposed to in your
service task
• Properly maintain your thermometer and calibrate it regularly

4
Controls and Indicators
A. Thermocouple Inputs
B. T1-T2 (Enter)
C. Min/Max (down arrow)
D. Power, Back light
E. Recall, Setup (Exit)
F. Hold, Log (up arrow)
G. Clear (Recall/Setup & Hold/Log)
DT720 Digital thermometer
EXIT
ENTER
CLEAR
T1-T2
MIN/
MAX
RECALL
SETUP
HOLD
LOG
TYPE
K
T1
T1 - T2
T2
m:s
ºF
T1
+
T2
+
30V
MAX
(top view)
B
F
C
G
D
E
A

5
LCD Display Functional Description
A. Thermocouple type
B. SETUP: Setup in progress
C. RECALL: the logged readings are displayed.
D. OFFSET: the thermocouple measurement also includes
an offset.
E. HOLD: the display readings do not change.
F. BATTERY LEVEL
G. LOG: Readings are being logged.
H. Temperature Unit: °F, °C, K
I. Memory
J. Min/Max/Avg
K. Temperature Differential: T1-T2
L. TIME DISPLAY: Shows time duration of test or log. Format
options available in SETUP.
h:m, m:s 24 (military) time
M. APO
N. T1/T2
TYPE
K J E
T R S
MEMORY MIN MAX AVG
T1
APO
T1 - T2
h:m m:s
ºF
K
ºC
T2
SETUP OFFSET HOLD
LOG
RECALL
A
L
M
N
B C D E
F
G
I
J
H
K

6
1. POWER (BACKLIGHT)
Press and hold the “ ” button to turn the
thermometer on and off. Press the “ ” button to
turn the backlight on and off. The backlight turns off
automatically after 60 seconds without any button
pressed. If the battery is low, the backlight is disabled.
2. T1/T2/ENTER
When you press the button, the secondary display
scrolls through the differential temperature and the
internal temperature in order.
The “ENTER” function is activated in the “SETUP”
mode only.
3. MIN/MAX ( )
Press the button to step through the maximum,
minimum, and average readings in the secondary
display.
When viewing logged readings, the maximum,
minimum, and average measurements are displayed.
Press and hold the “MIN/MAX” button stop viewing
MIN/MAX readings.
The “ ” scroll function is activated in the “RECALL”
and “SETUP” modes only.
4. HOLD/LOG ( )
Press the “HOLD” button to turn the “HOLD” function
ON or OFF. Press and hold the “LOG” button to enter
LOGGING mode, press and hold the “LOG” button to
exit LOGGING mode.
The “ ” scroll function is activated in the “RECALL”
and “SETUP” modes only.
5. LOGGING CLEAR
Press the “RECALL” and “HOLD” buttons
simultaneously displays “SUrE”.
Then, if you press the “ENTER” button, “CLr” is
displayed and the logging data is cleared.
If you press any button other than the “ENTER” button,
“Clear” is canceled.
6. RECALL SETUP (EXIT)
Press the button to recall or stop viewing logged and
MIN/MAX readings. Press and hold the button for more
MIN/
MAX
HOLD
LOG
HOLD
LOG
ENTER
T1-T2
EXIT
RECALL
SETUP
EXIT
RECALL
SETUP
&
Overview

7
EXIT
RECALL
SETUP
than 1 second to start or exit “SETUP”.The “EXIT” function
is activated in the “RECALL” and “SETUP” mode only.
7. RECALL
Press the “RECALL” button to enter the recall mode.
Press the “HOLD ( )” button to move to the next address
and press the “MIN/MAX ( )” button to move to the
previous address.
In Recall mode, press and hold “MAX/MIN” to step through
the recorded readings of min, max and average. Press the
“HOLD ( )” or “MIN/MAX ( )” button to exit the MIN/
MAX/AVG mode of the Recall mode.
Press “RECALL” button to exit Recall mode.
Operating Instructions
Before Operating
1. Plug the thermocouple(s) into the input terminal(s).
2. Press “ “ to turn the instrument on. After 1 second, the
thermometer displays the first reading and its differential
temperature. If no thermocouple is plugged into the selected
input or the thermocouple is “OPEN”, the display shows “----”.
How to Change Setup Options
Use “SETUP” to reset the thermometer or change the
temperature units, time units, time settings, thermocouple type,
Auto-Power-Off mode, logging interval, and offset.
Entering and Exiting Setup
1. Temperature units.
If you press the “ENTER” button while the “Unit” icon is
blinking, “C” (or F, K) will blink. With “C” (or F, K) blinking,
use the “ ”, “ ” buttons to change and press the “ENTER”
button to save the changed value. If you do not want to save the
changed value, press the “EXIT” button.
2. Date If you press “ ” while the “Unit” icon is blinking, “dAtE”
blinks. Press “ENTER” button while “dAtE” blinks. Then press
“ ” or “ ” button to move to “YEAr”, “ Mon”, “dAtE”.
Year
Press the “ENTER” button while the “YEAr” icon blinks.
Change the year with “ ” or “ ” button while “20YY” is blinking.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.

8
Month
Press the “ENTER” button while the “Mon” icon blinks.
Change month with “ ” or “ ” button while “MM”:dd
is blinking.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.
Date
Press the “ENTER” button while the “dAtE” icon blinks.
Change the date with the “ ” or “ ” button while mm:”DD”
is blinking.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.
3. Time
While the icon at the top of the LCD is blinking, press the “ ”,
“ ” buttons to move to the “tIME” item.With the “tIME” icon
blinking, press the “ENTER” button.
Press “ ”, “ ”button to move to “UnIt”, “Hour”, “ Min”, “
SEC” item.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.
Unit (“h:m”, “m:s”)
Press the “ENTER” button while the “Unit” icon blinks.
While “h:m” or “m:s” is blinking, press the “ ”, “ ” buttons
to change.
Press the “ENTER” button to save the changed value.If you do
not want to save the changed value, press the “EXIT” button.
Hour
Press the “ENTER” button while the “Hour” icon blinks.
Press the “ ” or “ ” button to change the time while
“HH”:mm is blinking.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.
Minute
Press the “ENTER” button while the “Min” icon blinks.
While hh:”MM” is blinking, press the “ ” or “ ” button to
change the minute.
Press the “ENTER” button to save the changed value. If you do
not want to save the changed value, press the “EXIT” button.
Second
Press the “ENTER” button while the “SEC” icon blinks.
Press “ ” or “ ” button to change seconds while “SS”
blinks.

9
Press the “ENTER” button to save the changed value. If you do not
want to save the changed value, press the “EXIT” button.
4. Type
While the icon at the top of the LCD is blinking, press the “ ”,
“ ” buttons to move to “tYPE”.
Press the “ENTER” button while the “tYPE” icon blinks. Change
the type by pressing the “ ”, “ ” button while the “ K “ (or
J, E, t, r, S) icon is blinking.
Short press the “ENTER” button to save the changed value.
If you do not want to save the changed value, press the “EXIT”
button.
5. APO
While the icon at the top of the LCD is blinking, press “ ”,
“ ” buttons to move to “APO”.
Press the “ENTER” button while the “APO” icon blinks.
While “On-1” (or ~ On-9, oFF) is flashing, use the “ ”, “ ”
buttons to change the content.
Press “ENTER” button to save the changed value. If you do not
want to save the changed value, press the “EXIT” button.
* On-1: 10min, On-2: 20min ~ On-9: 90min, Off
6. Interval
While the icon at the top of the LCD is blinking, press the “ ”,
“ ” buttons to move to “Int.V”.
With the “Int.V” icon blinking, press the “ENTER” button.
While the “In-1” (~In-4, uSEr, oFF) icon is blinking, press the
“ ”, “ ” buttons to change the content.
User setting: 00:00 00 ~ 23:59 59 (23 hours 59 minutes 59 seconds)
1) Press the “ENTER” button while the “uSEr” icon is blinking.
2) While the “HH” icon is blinking, press the “ ”,
“ ” buttons to change the value and then press the
“ENTER” button.
3) With the “MM” icon blinking, press “ ”, “ ” to change
the value and then press the “ENTER” button.
4) While the “SS” icon is blinking, press the “ ”, “ ”
buttons to change the value, and then press the “ENTER”
button. Press the “ENTER” button to save the changed
value. If you do not want to save the changed value, press
the “EXIT” button.
* In-1: 1sec, In-2 : 10sec, In-3 : 1min, In-4 : 10min
* User : 00:00 00~23:59 59 (00 hours 00 minutes 00 seconds to 23

10
hours 59 minutes 59 seconds)
7. Offset
While the icon at the top of the LCD is blinking, press the “ ”,
“ ” buttons to move to the “OFSt” item.
Press the “ENTER” button with the “OFSt” icon blinking.
While the “ t1 “~” t4 “ icon is blinking, press the “ ”, “
” buttons to change the value, then press the “ENTER” button.
While the “XX” icon is blinking, press the “ ”, “ ” buttons
to change the value, and then press the “ENTER” button.
* °C & K: (5.0 ~ -5.0), °F = (9.0 ~ -9.0)
8. Factory Reset
While the icon at the top of the LCD is blinking, press “ ”,
“ ” to move to “rESt”.
With the “rESt” icon blinking, press the “ENTER” button.
While the “ no “, “ YES” icon is blinking, press the “ ”,
“ ”buttons to change, then press the “ENTER” button.* After
selecting “ YES”, press “Enter” to save the factory default
status.
9. Exiting or continuing the “SETUP” menu. While the icon at the
top of the LCD is blinking, press “ ”, “ ” buttons to move to
“SUrE”.
Press “ENTER” button while “SUrE” blinks.
Press “ ”, “ ” button to change while “ no “, “ YES” blink
and press “ENTER” button.
NOTE: Press “”or “ ” to scroll to the setup option you want
Displaying Temperature
1. Press RECALL/SETUP button
Type
While the icon at the top of the LCD is blinking, press the “”,
“ ”buttons to move to “tYPE”.
Press the “ENTER” button while the “tYPE” icon blinks.
Change the type by pressing the “”, “ ”button while the “ K “
(or J, E, t, r, S) icon is blinking
Short press the “ENTER” button to save the changed value.
If you do not want to save the changed value, press the “EXIT”
button.
2. Hold or attach the thermocouple(s) to the measurement location.
The temperature reading appears in the selected display.
3. If you press the”
ENTER
T1-T2
”button, the internal temperature for T1, the