Unit UT3200+ Series User manual

User’s Manual
UT3200+ Series Multi-channel Temperature Tester

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Foreword
Dear Users,
Hello! Thank you for choosing this brand new UNI-T instrument. In order to use this instrument safely and
correctly, please read this manual thoroughly, especially the Safety Requirements part.
After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably
close to the device, for future reference.
Warranty Service
Copyright is owned by Uni-Trend Technology (China) Co., Ltd.
If the original purchaser sells or transfers the product to a third party within three year from the date of
purchase of the product, the warranty period of three year shall be from the date of the original purchase
from UNI-T or an authorized UNl-T distributor. Power cords, accessories and fuses, etc. are not included in
this warranty.
If the product is proved to be defective within the warranty period, UNI-T reserves the rights to either repair
the defective product without charging of parts and labor, or exchange the defected product to a working
equivalent product (determined by UNI-T). Replacement parts, modules and products may be brand new, or
perform at the same specifications as brand new products. All original parts, modules, or products which
were defective become the property of UNI-T.
The "customer" refers to the individual or entity that is declared in the guarantee. In order to obtain the
warranty service, “customer “must inform the defects within the applicable warranty period to UNI-T, and
perform appropriate arrangements for the warranty service.
The customer shall be responsible for packing and shipping the defective products to the individual or entity
that is declared in the guarantee. In order obtain the warranty service, customer must inform the defects
within the applicable warranty period to UNI-T, and perform appropriate arrangements for the warranty

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service. The customer shall be responsible for packing and shipping the defective products to the
designated maintenance center of UNI-T, pay the shipping cost, and provide a copy of the purchase receipt
of the original purchaser. If the products is shipped domestically to the purchase receipt of the original
purchaser. If the product is shipped to the location of the UNI-T service center, UNI-T shall pay the return
shipping fee. If the product is sent to any other location, the customer shall be responsible for all shipping,
duties, taxes, and any other expenses.
Guarantee Limit
This warranty shall not apply to any defects or damages caused by accidental, machine parts’ wear and tear,
improper use, and improper or lack of maintenance. UNI-T under the provisions of this warranty has no
obligation to provide the following services:
a) Any repair damage caused by the installation, repair, or maintenance of the product by non UNI-T service
representatives.
b) Any repair damage caused by improper use or connection to an incompatible device.
c) Any damage or malfunction caused by the use of a power source which does not conform to the
requirements of this manual.
d) Any maintenance on altered or integrated products (if such alteration or integration leads to an increase
in time or difficulty of product maintenance).
This warranty is written by UNI-T for this product, and it is used to substitute any other express or implied
warranties. UNI-T and its distributors do not offer any implied warranties for merchant ability or applicability
purposes.
For violation of this guarantee, regardless of whether UNI-T and its distributors are informed that any
indirect, special, incidental, or consequential damage may occur, UNI-T and its distributors shall not be
responsible for any of the damages.
Trademark
UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd.

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Statement
UNI-T products are protected by patent rights in China and foreign countries, including issued and
pending patents.
UNI-T reserves the rights to any product specification and pricing changes.
UNI-T reserves all rights. Licensed software products are properties of Uni-Trend and its subsidiaries
or suppliers, which are protected by national copyright laws and international treaty provisions.
Information in this manual supersedes all previously published versions.
1. Introduction
This manual includes safety requirements, installment and the operation of UT3200+ series multi-channel
temperature tester.
2. Safety Requirements
This section contains information and warnings that must be followed to keep the instrument operating
under safety conditions. In addition, user should also follow the common safety procedures.
Safety Precautions
Warning
Please follow the following guidelines to avoid possible electric shock and risk to
personal safety.
Users must follow the following conventional safety precautions in operation, service
and maintenance of this device. UNI-T will not be liable for any personal safety and
property loss caused by the user’s failure to follow the following safety precautions.
This device is designed for professional users and responsible organizations for
measurement purposes.
Do not use this device in any way not specified by the manufacturer. This device is only
for indoor use unless otherwise specified in the product manual.
Safety Statement
Warning
“Warning” indicates the presence of a hazard. It reminds users to pay attention to a
certain operation process, operation method or similar. Personal injury or death may
occur if the rules in the “Warning” statement are not properly executed or observed. Do

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not proceed to the next step until you fully understand and meet the conditions stated in
the “Warning” statement.
Caution
“Caution” indicates the presence of a hazard. It reminds users to pay attention to a
certain operation process, operation method or similar. Product damage or loss of
important data may occur if the rules in the “Caution” statement are not properly
executed or observed. Do not proceed to the next step until you fully understand and
meet the conditions stated in the “Caution” statement.
Note
“Note” indicates important information. It reminds users to pay attention to procedures,
methods and conditions, etc. The contents of the “Note” should be highlighted if
necessary.
Safety Sign
Danger
It indicates possible danger of electric shock, which may cause
personal injury or death.
Warning
It indicates that you should be careful to avoid personal injury or
product damage.
Caution
It indicates possible danger, which may cause damage to this device
or other equipment if you fail to follow a certain procedure or
condition. If the “Caution” sign is present, all conditions must be met
before you proceed to operation.
Note
It indicates potential problems, which may cause failure of this
device if you fail to follow a certain procedure or condition. If the
“Note” sign is present, all conditions must be met before this device
will function properly.
AC
Alternating current of device. Please check the region’s voltage
range.
DC
Direct current device. Please check the region’s voltage range.
Grounding
Frame and chassis grounding terminal
Grounding
Protective grounding terminal
OFF
Main power off
ON
Main power on
Power Supply
Standby power supply: when the power switch is turned off, this
device is not completely disconnected from the AC power supply.
CAT I
Secondary electrical circuit connected to wall sockets through
transformers or similar equipment, such as electronic instruments
and electronic equipment; electronic equipment with protective
measures, and any high-voltage and low-voltage circuits, such as the
copier in the office.

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CAT II
Primary electrical circuit of the electrical equipment connected to
the indoor socket via the power cord, such as mobile tools, home
appliances, etc. Household appliances, portable tools (e.g. electric
drill), household sockets, sockets more than 10 meters away from
CAT III circuit or sockets more than 20 meters away from CAT IV
circuit.
CAT III
Primary circuit of large equipment directly connected to the
distribution board and circuit between the distribution board and the
socket (three-phase distributor circuit includes a single commercial
lighting circuit). Fixed equipment, such as multi-phase motor and
multi-phase fuse box; lighting equipment and lines inside large
buildings; machine tools and power distribution boards at industrial
sites (workshops).
CAT IV
Three-phase public power unit and outdoor power supply line
equipment. Equipment designed to “initial connection”, such as
power distribution system of power station, power instrument, front-
end overload protection, and any outdoor transmission line.
Certification
CE indicates a registered trademark of EU
Certification
UKCA indicates a registered trademark of UK
Certification
ETL indicates a registered trademark of Intertek.
Waste
This product complies with the marking requirements of WEEE
Directive (2002/96/EC). This additional label indicates that this
electrical / electronic product must not be discarded in household
waste.
EFUP
This environment-friendly use period (EFUP) mark indicates that
dangerous or toxic substances will not leak or cause damage within
this indicated time period. The environment-friendly use period of
this product is 40 years, during which it can be used safely. Upon
expiration of this period, it should enter the recycling system.
Safety Requirements
Warning
Preparation before use
Please connect this device to AC power supply with the power cable
provided.
The AC input voltage of the line reaches the rated value of this
device. See the product manual for specific rated value.
The line voltage switch of this device matches the line voltage;
The line voltage of the line fuse of this device is correct.
Check all terminal rated
values
Please check all rated values and marking instructions on the product
to avoid fire and impact of excessive current. Please consult the
product manual for detailed rated values before connection.
Use the power cord
properly
You can only use the special power cord for the instrument approved
by the local and state standards. Please check whether the insulation

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layer of the cord is damaged or the cord is exposed, and test whether
the cord is conductive. If the cord is damaged, please replace it
before using the instrument.
Instrument Grounding
To avoid electric shock, the grounding conductor must be connected
to the ground. This product is grounded through the grounding
conductor of the power supply. Please be sure to ground this product
before it is powered on.
AC power supply
Please use the AC power supply specified for this device. Please use
the power cord approved by your country and confirm that the
insulation layer is not damaged.
Electrostatic prevention
This device may be damaged by static electricity, so it should be
tested in the anti-static area if possible. Before the power cable is
connected to this device, the internal and external conductors should
be grounded briefly to release static electricity. The protection grade
of this device is 4 kV for contact discharge and 8 kV for air discharge.
Measurement accessories
Measurement accessories are of lower class, which are definitely not
applicable to main power supply measurement, CAT II, CAT III or CAT
IV circuit measurement.
Use the input / output port
of this device properly
Please use the input / output ports provided by this device in a
properly manner. Do not load any input signal at the output port of
this device. Do not load any signal that does not reach the rated value
at the input port of this device. The probe or other connection
accessories should be effectively grounded to avoid product damage
or abnormal function. Please refer to the product manual for the
rated value of the input / output port of this device.
Power fuse
Please use power fuse of specified specification. If the fuse needs to
be replaced, it must be replaced with another one that meets the
specified specifications by the maintenance personnel authorized by
UNI-T.
Disassembly and cleaning
There are no components available to operators inside. Do not
remove the protective cover.
Maintenance must be carried out by qualified personnel.
Service environment
This device should be used indoors in a clean and dry environment
with ambient temperature from 0℃to 40℃.
Do not use this device in explosive, dusty or humid air.
Do not operate in humid
environment
Do not use this device in a humid environment to avoid the risk of
internal short circuit or electric shock.
Do not operate in
flammable and explosive
environment
Do not use this device in a flammable and explosive environment to
avoid product damage or personal injury.
Caution
Abnormality
If this device may be faulty, please contact the authorized
maintenance personnel of UNI-T for testing. Any maintenance,

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adjustment or parts replacement must be done by the relevant
personnel of UNI-T.
Cooling
Do not block the ventilation holes at the side and back of this device;
Do not allow any external objects to enter this device via ventilation
holes;
Please ensure adequate ventilation, and leave a gap of at least 15 cm
on both sides, front and back of this device.
Safe transportation
Please transport this device safely to prevent it from sliding, which
may damage the buttons, knobs or interfaces on the instrument
panel.
Proper ventilation
Poor ventilation will cause the device temperature to rise, thus
causing damage to this device. Please keep proper ventilation during
use, and regularly check the vents and fans.
Keep clean and dry
Please take actions to avoid dust or moisture in the air affecting the
performance of this device. Please keep the product surface clean
and dry.
Note
Calibration
The recommended calibration period is one year. Calibration should
only be carried out by qualified personnel.
3. Product Overview
UT3200+ series multi-channel temperature tester includes six models UT3208+, UT3216+, UT3224+,
UT3232+, UT3240+ and UT3248+, which respectively corresponding to 8, 16, 24, 32, 40 and 48 channels. User
can purchase the temperature tester according to their needs.
UT3200+ series adopts 4.3 inch LCD and support J, K, T, E, S, N, B, R thermocouple input. Multi-channel
temperature data can be collected at the same time, with intuitive numerical reading, histogram and curve
chart display, so that user can read the parameter with multiple modes or save the data in USB. The
instrument has the alarm for over upper/lower limit and communication transmission function. Its perfect
function and performance can meet the needs of production, laboratory and R&D measurements.
The instrument is equipped with RS232C interface, data acquisition, analysis and printing can be realized
through the standard computer software. The instrument supports real-time storage of sampling data. User
can calibrate data of each channel independently.It widely used in lighting appliances, electric tools,
household appliances, electric motors, electric heating appliances, medicine, petroleum, chemical,
metallurgy, electric power industries and scientific research institutions in the field of production lines,
laboratories, quality control departments.

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3.1 Specifications and Functions
Item
Description
Display
Direct numerical reading
Curve chart
Histogram
Measurement
Thermocouple type: J, K, T, E, S, N, B, R
Test Range: -200.0℃~1800.0℃(the range will change with different thermocouple
model)
Resolution: 0.01
Number of channel: 8~48 (channel is configured according to different model)
Test speed: Slow, Fast
Main
Functions
Sorting: built-in sorting data can set the upper/lower limit for the temperature of each
channel
Beep: alarm for over the upper/lower limit
Calibration: user can set calibration for the data of each channel
Lock key
Print screen key
Storage
FAT: user can creat the file with the suffixal【.csv】and save the data of each channel
into USB (not support mobile hard disk)
Interface
RS232C communication interface
LAN communication interface
Remote
Control
Baud rate supports up to 115200bps and compatiable with SCPI protocol and ASCII
transmission
System Setup
Chinese, English
Date, time and key sound
Environmental
Temperature
Temperature: 15℃~35℃, humidity <80%RH
Operating: temperature 10℃~40℃, humidity 10~90%RH
Storage temperature 0℃~50℃, humidity 10~90%RH
Size
214mm*88.2*330.3mm
Weight
3.4kg (net weight)
3.2 Accuracy of Instrument
The accuracy of cold junction compensation is ±0.5℃.
The measurement accuracy of different thermocouple is shown as the following table.
The measurement accuracy divides into three parts: cold junction compensation, the

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measurement accuracy of the instrument (it is different when using different thermocouple)
and the measurement accuracy of thermocouple.
The measurement accuracy of thermocouple is subject to the standard of manufacturer.
Sensor Model
Temperature (℃)
Accuracy (℃)
Type T thermocouple
-150℃-0℃
±1.0℃
0℃-400℃
±0.8℃
Type K thermocouple
-100℃-0℃
±1.2℃
0℃-1350℃
±0.8℃
Type J thermocouple
-100℃-0℃
±1.0℃
0℃-1200℃
±0.7℃
Type N thermocouple
-100℃-0℃
±1.5℃
0℃-1300℃
±0.9℃
Type E thermocouple
-100℃-0℃
±0.9℃
0℃-850℃
±0.7℃
Type S thermocouple
0℃-100℃
±4.5℃
100℃-300℃
±3.0℃
300℃-1750℃
±2.2℃
Type R thermocouple
0℃-100℃
±4.5℃
100℃-300℃
±3.0℃
300℃-1750℃
±2.2℃
Type B thermocouple
600℃-800℃
±5.5℃
800℃-1000℃
±3.8℃
1000℃-800℃
±2.5℃