Unit UT3200 Series User manual

UT3200 Series
Benchtop Thermometer

UT3200 Series User Manual
2
Preface
Thank you for purchasing this brand new product. In order to use this product safely and
correctly, please read this manual thoroughly, especially the safety notes.
After reading this manual, it is recommended to keep the manual at an easily accessible place,
preferably close to the device, for future reference.
Copyright Information
UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.
UNI-T Uni-Trend Technology (China) Co., Ltd. All rights reserved
UNI-T products are protected by patent rights in China and other countries, including
obtained patents and pending patents. The company reserves the right to change the
product specifications and prices.
Limited Warranty and Liability
Uni-Trend guarantees that the product is free from any defect in material and workmanship
within three years from the purchase date. This warranty does not apply to damages caused
by accident, negligence, misuse, modification, contamination or improper handling. The
dealer shall not be entitled to give any other warranty on behalf of Uni-Trend. If you need
warranty service within the warranty period, please contact your seller directly.
Uni-Trend will not be responsible for any special, indirect, incidental or subsequent damage or
loss caused by using this device.

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Safety Instructions
Disclaimer: Please read safety instruction carefully, UNI-T shall not be liable for any loss of
personal safety or property caused by users' failure to comply with the following terms and
conditions.
▪Connect the power ground wire correctly to avoid of electric shock.
▪Do not open Instrument cover. It may have charge didn’t run out after turn off. There is a
potential danger of electric shock.
▪Do not use Instrument in wrong situation.
WARNING：Do not add DC voltage of more than 350V or AC voltage of
more than 220V to the test end, otherwise the Instrument will be
damaged.
Environment-friendly use period (EFUP): The period during which the
hazardous substances do not leak or mutate under normal use. The
Instrument EFUP is 40 year. It should be recycle when time
Waste Electrical & Electronic Equipment (WEEE): Directive 2002/96/EC

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CATALOGUE
1. Preface ......................................................................................................................................2
2. Copyright Information...............................................................................................................2
3. Limited Warranty and Liability..................................................................................................2
4. Safety Instructions.....................................................................................................................3
5. 1. PRODUCT INTRODUCTION ....................................................................................................5
a) 1.1 Product series..............................................................................................................5
b) 1.2 Specifications and functions........................................................................................6
c) 1.3 Instrument accuracy....................................................................................................6
d) 1.4 Front Cover..................................................................................................................7
e) 1.5 Back front....................................................................................................................9
6. 2. INSTALLATION AND SETUP ..................................................................................................10
a) 2.1 Packing list.................................................................................................................10
b) 2.2 The power supply requirements ...............................................................................10
c) 2.3 Operation environment.............................................................................................11
d) 2.4 Cleaning.....................................................................................................................11
e) 2.5 Instrument lift handle ...............................................................................................11
7. 3. TEST PREPARATION..............................................................................................................12
a) 3.1 Plug in........................................................................................................................12
b) 3.2 Test line and installation............................................................................................12
c) 3.3 Channel mark ............................................................................................................13
d) 3.4 USB............................................................................................................................14
e) 3.5 Operation guide ........................................................................................................14
8. 4. TEST.....................................................................................................................................15
a) 4.1 Numerical reading.....................................................................................................15
b) 4.2 Curve figure...............................................................................................................16
i. 4.2.1 Curve figure the high and lower limit set up..................................................16
ii. 4.2.2 Curve figure set up.........................................................................................17
c) 4.3 Histogram figure........................................................................................................18
i. 4.3.1 Automatic mode.............................................................................................18
ii. 4.3.2 Manual mode.................................................................................................20
d) 4.4 USB recording function .............................................................................................20
e) 4.5 Print screen ...............................................................................................................21
9. 5. TEMPERATURE ALAR ...........................................................................................................21
a) 5.1 Comparator set up ....................................................................................................21
b) 5.2 Channel setting..........................................................................................................22
c) 5.3 High or lower limit indication....................................................................................23
10. 6. SETUP ..................................................................................................................................24
a) 6.1 Setup page.................................................................................................................24
i. 6.1.1 RATE................................................................................................................25
ii. 6.1.2 UNIT................................................................................................................25
iii. 6.1.3 KEY BEEP.........................................................................................................25
iv. 6.1.4 USB - File name initial ....................................................................................25
v. 6.1.5 USB - TIME PERIOD PER FILE ..........................................................................25
vi. 6.1.6 DELAY –record time interval..........................................................................26
b) 6.2 Channel set page.......................................................................................................26
c) 6.3 GUEST CAL.................................................................................................................26
11. 7. SYSTEM CONFIG ..................................................................................................................27
a) 7.1 Setup page.................................................................................................................28
i. 7.1.1 LANGAGE........................................................................................................28
ii. 7.1.2 Date/Time ......................................................................................................28
iii. 7.1.3 ACCOUNT .......................................................................................................29
iv. 7.1.4 Com mode......................................................................................................29
b) 7.2 System information...................................................................................................30
c) 7.3 System service...........................................................................................................30
12. 8. FILE......................................................................................................................................30
a) 8.1 File page ....................................................................................................................30
13. 9. COM MODE.........................................................................................................................31
a) 9.1 RS-232C .....................................................................................................................31
b) 9.2 USB............................................................................................................................32
c) 9.3 SCPI Language ...........................................................................................................33

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1. PRODUCT INTRODUCTION
▪Product series
▪Specifications and functions
▪Instrument accuracy
▪Front-panel and back-panel
1.1 Product series
UT3200 Series Benchtop Thermometer have four models: UT3208, UT3216, UT3224, and
UT3232. The four models correspond to number of 8, 16, 24 and 32 thermocouple test
channels. User can purchase temperature tester according to their needs.
Model
Number of Channels
UT3208
8
UT3216
16
UT3224
24
UT3232
32
4.3 inch LCD display, support J, K, T, E, S, N, B, R thermocouple input, collect multi-channel
temperature data at the same time. It will display data in numerical reading, histogram and
curve figure. Data can record on the USB memory. Instrument has the over high and low
temperature alarm and communication transmission function. Its great performance, easy
operation can satisfy production, laboratory and research requirements.
Instrument has RS232 interface to connect computer to collect, analysis and print data. It
support USB real-time storage. User can amend each channel values independently. UT3200
Series Benchtop Thermometer can widely use in the fields of lighting appliances, electric tools,
household appliances, electric motors, electric heating appliances, medicine, petroleum,
chemical metallurgy, electric power industry, factory production, laboratory, quality inspection
and scientific research department.

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1.2 Specifications and functions
Specifications
Functions
Display
Numerical reading
Curve figure
Histogram figure
Test
Thermocouple input: J, K, T, E, S, N, B, R
Testing range: -200.0℃-1800.0℃(different model)
Resolution ratio: 0.1℃
Number of channel: 8-32 (different model)
Speed: fast, slow
Major functions
Sorting: each channel can set upper and lower limits
Beep: high/low temperature
Correction: amend each channel values independently
Lock button
Print Screen
Storage
FAT(File Allocation Table): allow to create format .csv
document, every channel data can save into USB (Hard
drives are not supported)
Interface & Protocol
RS232 communication interface
USB communication interface
Compatible with SCPI instruction set
Remote control
Support up to 115200bps baud rate, compatible with
SCPI protocol, ASCIl transport
System config
Chinese, English switch
Date, time, button sound
Administrator / User account, Administrator can set the
password
Environmental temperature
Indicator: temperature 15℃-35℃humidity < 80%RH
Operation: temperature 10℃-40℃humidity 10-90%RH
Storage: temperature 0℃-50℃humidity 10-90%RH
Size
L340mm×W214mm×H89mm
Weight
3.5kg（net weight）
1.3 Instrument accuracy
Instrument accuracy does not include standard contact compensation accuracy. Standard
contact compensation adds ± 0.5 °C to the thermocouple accuracy of measuring temperature.
The measurement accuracy of thermocouple sensors should be based on the sensor
manufacturer's standard.

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Sensor Model
Temperature (℃)
Accuracy (℃)
T thermocouple
-150℃-0℃
±1.0℃
0℃-400℃
±0.8℃
K thermocouple
-100℃-0℃
±1.2℃
0℃-1350℃
±0.8℃
J thermocouple
-100℃-0℃
±1.0℃
0℃-1200℃
±0.7℃
N thermocouple
-100℃-0℃
±1.5℃
0℃-1300℃
±0.9℃
E thermocouple
-100℃-0℃
±0.9℃
0℃-850℃
±0.7℃
S thermocouple
0℃-100℃
±4.5℃
100℃-300℃
±3.0℃
300℃-1750℃
±2.2℃
R thermocouple
0℃-100℃
±4.5℃
100℃-300℃
±3.0℃
300℃-1750℃
±2.2℃
B thermocouple
600℃-800℃
±5.5℃
800℃-1000℃
±3.8℃
1000℃-800℃
±2.5℃
1.4 Front Cover
Figure 1-4-1 UT3208 as example

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Number
Button
Description
①
On/Off button: turn on is
yellow color. Turn off is red
color
②
Function button F1-F6
③
Cancel / Return
Screenshot can store in USB
④
Test button is display
measurement result
Setup button is used for set
measurement parameters
When press LOCK button
others can’t work. Long
press 1 second to unlock
⑤
Number button to input
numbers and values
add, subtract and delete
button.
⑥
Cursor button is used for
move up, down, left, right
Enter button is used for
confirm
⑦
USB interface
⑧
4.3 inch LCD display
Figure 1-4-1 Function

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Symbol
Description
Save data and screenshot
Alarm reminder
Comparator function
Lock model
Temperature UNIT
Collecting data
Figure 1-4-2 Symbol
1.5 Back front
Figure 1-5-1 Back front UT3208 as example
Number
Description
①
RS232 interface
②
USB interface
③
AC power socket (without fuses, the fuses
installed in Instrument interior)
④
A set of data acquisition modules (UT3208)
UT3216/24/32 are equipped with 2/3/4 test
modules

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2. INSTALLATION AND SETUP
▪Packing list
▪The power supply requirements
▪Operation environment
▪Cleaning
▪Instrument lift handle
2.1 Packing list
Please check pack list before use Instrument
1. Check the appearance if there is any damage, scratch and other adverse phenomena
2. Check Instrument packing list if there is something missing
Parts
Quantity
Notes
Instrument
1
Power cord
1
Use only a specified power cord which is
authorized in the country of use
8G USB
1
8-channel temperature test
module
x /set
temperature test module is equipped with
Instrument model. UT3208/16/24/32 are
equipped with 1/2/3/4 test modules
USB communication cable
1
Channel identification
sticker
1
Certificate and warranty
license
1
Manual
1
Electronic file, download from official website
2.2 The power supply requirements
UT3200 Series Benchtop Thermometer can only use in 100-240VAC, 50/60Hz, 10VA
WARNING: Make sure Instrument connect the power ground wire correctly to avoid of
electric shock.

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2.3 Operation environment
UT3200 Series Benchtop Thermometer can only use in environment Temperature 10℃-40℃,
Humidity 10-90%RH, Altitude 0-2000 meter
2.4 Cleaning
Do not clean Instrument inside
Use a clean cloth to wipe cover
WARNING: Do not use solvent (alcohol or gasoline) to clean Instrument
2.5 Instrument lift handle
Lift handle is adjustable, hold both sides then pull, see Figure as below
Figure 2-5-1 original position Figure 2-5-2 Test position
Figure 2-5-3 Undock position Figure 2-5-4 Lift position

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3. TEST PREPARATION
▪Plug in
▪Test line and installation
▪Channel mark
▪USB
▪Operation guide
3.1 Plug in
Connect standard power line to test Instrument is work on. Turn on on-off button, it will
display yellow light. On is yellow color, Off is red color.
WARNING: Make sure power voltage is consistent with the supply voltage, otherwise
Instrument will burn out. Do not use patch panel without ground connection.
3.2 Test line and installation
Instrument is equipped with K-type thermocouple test lines, as shown in Figure 3-3-1, each
of 8-way temperature test modules contains 8 test lines, which can measure the
temperature of 8 channels at most at the same time. The specific model and specifications of
each set of test modules are as follows,
▪Model and name: UT-T21M 8-way temperature test modules
▪Sensor model: K thermocouple
▪Length: 2 meter×8 line
▪Temperature range: -100-200℃
Figure 3-3-1 8-way temperature test modules

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WARNING: Make sure test temperature within test line range. UT3208/16/24/32 is
equipped with set of 1/2/3/4
Installation step:
Make sure the power of Instrument is turned off. Please set up as follows,
1. As figure 2-6-1 shown, test line interface face up on same level
2. Insert the test lead in the direction indicated by the arrow of Figure 2-6-1
3. Other channel connect steps is the same
WARNING: The isolation voltage between channels is 350V DC and 230V AC
Figure 2-6-1 Instrument data collect port
Figure 2-6-2 Test line interface
3.3 Channel mark
Instrument is equipped with paster to distinguish different channels which printed
with channel number CH01, CH02 etc. User can past it on different test lines upon
their needs.
Figure 3-4-1 Benchtop Thermometer, take UT3232 as an example
Data acquisition module in the first row on the left, from left to right, correspond to
CH01 CH02 CH03...CH08 channel
Data acquisition module in the second row on the left, from left to right, correspond
to CH09 CH10 CH11...CH16 channel
Data acquisition module in the third row on the left, from left to right, correspond to
CH17 CH10 CH19...CH24 channel

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Data acquisition module in the first row on the right, from left to right, correspond to
CH25 CH26 CH27...CH32 channel
Other model data acquisition module of other Instrument are also sorted in the
same way.
Figure 3-4-1 UT3232
3.4 USB
Instrument is equipped with an 8G USB, USB recording function only use Test,
Histogram figure, Curve figure page. Before starting data collection, insert the USB into
Instrument interface.
About USB recording function, you can refer to the contents of section 6.1.4-6.1.6
It is recommended to use brand USB to avoid the problem of incompatible
identification. The format and capacity of the USB can be referred to FAT, FAT32 and
EXFAT, with the maximum capacity of 128G.
3.5 Operation guide
▪Connect power correctly
▪Turn on Instrument switch, the screen will light up. Check the contact lines of each
temperature are connected well. Start to collect data, if the connection is wrong,
there is no temperature display on this connection line; if the connection is normal,
temperature will display.
▪Inter USB into Instrument interface
▪Select the test part to fix the temperature connection line layout with glue. The layout
must be attached to the test surface to avoid the value precision. You can use the
channel identification sticker to distinguish different test lines

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▪After fix the temperature connection line layout, turn on to start test. Do not move
Instrument as testing, it will affect the value precision
▪After the test is completed, disconnect the test cable and unplug USB
▪Arrange the lines then turn off Instrument
4. TEST
▪Numerical reading
▪Curve figure
▪Histogram figure
▪USB recording function
▪Print screen
4.1 Numerical reading
Press Test button to enter. If you need to record data, insert the USB into Instrument
interface before data collection. There are three way to display measurement result:
numerical reading, histogram figure and curve figure.
Numerical reading is the best way to read one or more channel values at some point in time.
Press Start button, Instrument will start to collect data. A green flashing cursor at the top of
the screen indicates that the data is being collected, test values will show in blue. Press Stop
button to terminate data collect. Refer to Figure 4-1-1.
Figure 4-1-1
Turn on/off channel
Turn off specific channel, press direction button▼, choose 002 K then press Stop, 002 K
channel value will be close. 002 K display grey color, test value disappear. See Figure 4-1-2
Press Start button, test values will return. After setting, press Test button to return to the
measurement page.

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Figure 4-1-2
Different font: +/- function button to switch font size. When press function button, 8 channels
of data will be added or decreased on the screen accordingly. Users can switch font size
depend on their own needs.
4.2 Curve figure
Curve figure is the direct way to read temperature trends. Refer to Figure 4-2-1
Figure 4-2-1
Figure 4-2-1 is an example of the temperature change with different time of Channel CH01-
CH08. The horizontal axis represents time and the vertical axis represents temperature. The
vertical axis range is based on the set of high and low temperature. You can evaluate object
temperature before test to narrow the range of vertical axis graph.
4.2.1 Curve figure the high and lower limit set up
1. Press Setup button to enter Function page
2. Use the cursor key to the high or lower limit, use the numeric keypad to enter the high
and lower limit values and press OK button to confirm. When the temperature display unit
is ℃, the initial default lower to high limit of the instrument is -200℃and 1800℃. If the
temperature of the object is between 20℃-40℃, the lower limit can be set as 20℃and
the upper limit as 40℃

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3. The horizontal axis equal to the time axis, the range can be set between 500ms-2mins.
This function is related to the speed. Slow speed and fast speed correspond to different
time ratios.
Function Button
Description
Low speed
Fast speed
The horizontal axis equal to the time axis
1s
500ms
The horizontal axis equal to the time axis
2s
1s
The horizontal axis equal to the time axis
5s
2s
The horizontal axis equal to the time axis
10s
5s
The horizontal axis equal to the time axis
20s
10s
The horizontal axis equal to the time axis
30s
20s
The horizontal axis equal to the time axis
1min
30s
The horizontal axis equal to the time axis
2min
1min
The horizontal axis equal to the time axis
4. Press Test button, then press Function button to enter curve figure page. Press Start,
Instrument will start to collect data and record the curve of temperature change.
4.2.2 Curve figure set up
Function Button
Description
Stop
Stop data collect
Return
Return to test value page
Up
The curve goes up in parallel
Down
The curve goes down in parallel
Switch
The original page is display 8 channel, use
Switch button to enter other channel
page
X axis shift to the left
To read the curve of the next time point
X axis shift to the right
To read the curve of the last time point
Y axis zoom in
Zoom in the curve of temperature range
Y axis zoom out
Zoom out the curve of temperature range
X axis zoom in
Zoom in time axis
X axis zoom out
Zoom out time axis
Trace
X axis will not update, automatically, use
Trace enter to refresh data
Reset
Restore the initial Settings.

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4.3 Histogram figure
Histogram figure is used to read the temperature of the same group of data or you can set
specific channel temperature to read the current value. The following is a detailed introduction
of the two display methods:
4.3.1 Automatic mode
Automatic mode is the comparison of temperature values of 8 channels on the same set of
test modules. Instrument factory default set is automatic mode.
▪8 channel values ≥0℃ ;
Percentage of each channel the measure temperature value
the maximum value of the same set of test modules
▪8 channel values ≤0℃ ;
Percentage of each channel the measure temperature value
the absolute value of the same set of test modules
▪8 channel values of positive percentage ＝
the measure temperature value
the maximum value of the same set of test modules
▪8 channel values of negative percentage ＝
the measure temperature value
the absolute value of the same set of test modules
Set up
1. Press Setup to enter Function page
2. Move the cursor key to the histogram figure, press Function to enter Automatic mode
3. Press Test to choose histogram figure. Press Start button to collect data and record the
histogram change of temperature
Figure 4-3-1A CH01-08 Histogram figure (Temperature value＞0)

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Figure 4-3-1B CH01-08 Histogram figure (Temperature value＜0)
Figure 4-3-1C CH01-08 Histogram figure (Positive and negative temperature)
When the current temperature value over the high limit of the range, it will display
.At this time, the system will judge the channel value as positive value
to divide the column into upward and downward display in this situation. The
temperature reading is not displayed in the bar chart and the percentage is invalid as
0.0%. Refer to Figure4-3-1D
Figure 4-3-1D Out of test range histogram figure value

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Figure 4-3-1D Out of test range histogram figure value
4.3.2 Manual mode
Manual mode is the specific gravity of the temperature of the current test channel in the
set temperature range. If the temperature range is set, this ratio can be used to visually
observe the distance exceeding the limit of the measured temperature distance
Percentage of each channel
the measure temperature value－current temperature of lower limit value
current temperature of upper limit value－current temperature of lower limit value
Setup steps:
1. Press Setup button to enter Function page
2. Move the cursor key to the histogram figure, use Function button to enter Manual mode
3. Use Function button to enter Channel setting, move the cursor to set the upper and
lower limit temperature of a specific channel, use the numeric key enter the upper and
lower limit value then press OK to confirm
4. Press Test button to choose histogram figure. Press Start button to collect data and
record the histogram change of temperature
4.4 USB recording function
USB recording only use in Test, Histogram figure, Curve figure page. USB recoding time is based
on Instrument internal clock. When Instrument time stop work, it will affect data recording.
When Instrument clock does not work, the battery should be changed. It is recommended to
return to the factory for replacement.
Data includes two parts: Instrument information (file name, product model, product software
version and number of product channel); corresponding channel temperature (temperature
unit, time, channel type, and each channel test value) Example: file path UT3232/ 2019-08-
13/UNIT 10001.csv
The data format is floating point, split by”,”