Unit UT5583 User manual

User’s Manual
UT5583 Insulation Resistance Tester

User’s Manual UT5583 Insulation Resistance 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
UNI-T warrants that the product will be free from defects for a three-year period. If the product is re-sold,
the warranty period will be from the date of the original purchase from an authorized UNI-T distributor.
Probes, other accessories, and fuses 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. Replacement parts and products may be brand new, or perform at the same
specifications as brand new products. All replacement parts, modules, and products 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 to
perform appropriate arrangements for the warranty 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 product is shipped domestically
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.
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

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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.
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.

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1. Introduction
This manual includes safety requirements, installment and the basic operation of UT5583 insulation
resistance 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
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.

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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
Grounding
Measurement 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;

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electronic equipment with protective measures, and any high-voltage and low-
voltage circuits, such as the copier in the office.
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

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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 checkall 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 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.

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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, 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.

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3. Product Overview
UT5583 insulation resistance tester adopts high-performance controller, it has 4.3 inch TFT-LCD
display. Output voltage can freely set 1V~1000V to meet most of the test requirements. Six range
measurement, insulation resistance measurement range can reach to 10 kΩ~10 TΩ, sampling rate up to
30 ms/time. UT5583 has a wide range of communication interfaces, providing a preferred test solution
for automated production.
3.1 Measurement Application
Ultra high value resistor
A variety of insulation materials, devices and wires and cables
Automatic test system
3.2 Accuracy of Instrument
Measurement
parameter
Insulation resistance, leakage current
Output voltage
Range control 1V～1000V (DC):
When voltage ≥10V, adjusting step 1V
When voltage <10V, adjusting step 0.1V
Accuracy of
voltage
When voltage≥10V, 1%±1V
When voltage <10V, 10%±0.1V
Measurement
range
Resistance: 10 kΩ～10 TΩ
Current: 100 pA～250 uA
Accuracy of
measurement
1V ≤ Voltage <10V
5% (less than 1M); 1% (1M~100M); 5% (100M~10G);
10% (greater than 10G)
10V ≤ Voltage ≤1000V
5% (less than 1M); 1% (1M~1G); 3% (1G~10G);
5% (10G~100G); 10% (100G~1T); 15% (greater than 10G)
Test speed
Fast speed: 30 ms/time; Middle speed: 100 ms/time; Slow speed: 500 ms/time
Range mode
Automatic, lock, nominal (select the best range according to the comparator setting)
Maximum of
charging
current
25 mA ± 5 mA
Display result
Voltage, current, resistance, sorting result, audible and visual alarm
Trigger mode
Internal trigger, manual trigger, external trigger, bus trigger
Charge time
0～999s
Test time
0～999s
Discharge time
0～999s
Comparator
function
Record of 1 group, judge the upper limit (UFAIL), qualified (PASS), the lower limit (LFAIL)
Calibration
function
Full range open-circuit zero clearing
Screen display
4.3 inch TFT-LCD

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Sotrage and Interface
USB HOST
√ (support USB 128G)
File
management
Save 100 test files, USB supports file access
USB data
record
√
Control
interface
HANDLER, FOOT
Communication
protocol
SCPI, Modbus RTU
Communication
interface
RS232C, USB HOST, LAN (option RS485)
3.3 Main Features
4.3 inch TFT-LCD, easy operation panel
Real-time monitoring output voltage
Dual display of insulation resistance and leakage current
Charge time, test time and discharge time can be adjusted
Calibration function, full range open circuit zero clearing
Contact detection for capacitive materials
Digit display function (5 digits/4 digits)
Comparator function: sorting qualification and disqualification
Sound setting of sorting judgement
Quick discharge battery function
USB data record
Save 100 test files, USB supports file access
Various interfaces, support two protocols, SCPI and MODBUS
3.4 Main Functions
3.4.1 Range
Use 6 range measurement, range divides into automatic, manual and nominal.
Nominal range: the instrument will select the best range according to the comparator setting.
3.4.2 Test Speed
Slow speed: 500 ms/time
Middle speed: 100 ms/time
Fast speed: 30 ms/time
3.4.3 Trigger Mode
Internal trigger: internal automatic cycle generates a measurement
Manual trigger: press [MAN] trigger key to generate a measurement

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Bus trigger: use communication command [BUS] to generate a measurement
External trigger: Handler trigger
3.4.4 Basic Accuracy
Maximum accuracy of voltage source: 1% * Setting value ± 1V
Maximum accuracy of insulation resistance: 1%
3.4.5 Calibration Function
Full range open circuit zero clearing: eliminate the effect of stray impedance
3.4.6 Various Interfaces
HANDLER
UT5583 has sorting function.
The instrument has independent and separate power supply, so external power supply is not necessary.
Optoelectronic isolator
Input: start signal, stop signal, trigger signal, lock key signal; input port of built-in pull-up resistor
Output: all sorting comparison result signals; test completion signal (EOM); large current drive output
can direct drive relay.
RS-232C Interface
Support the maximum baud rate of 115200 bps, and compatible with SCPI and Modbus RTU protocol.
LAN Interface
Support 100 Mbit/s transmission rate
The instrument has two ways to connect PC via LAN port.
Direct connect to PC via network cable
Connect to PC via router
USB Interface
Support record measurement data
Support file access
Support screenshot function
Support program update, convenient for personalized customization
FOOT.C Interface
Convenient for external connecting footswitch
RS-485 Interface (option)
Support the maximum baud rate of 115200 bps, and compatible with SCPI and Modbus RTU protocol.

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4. Product Introduction
4.1 Front Panel
Figure 4-1 Front Panel
No.
Description
1
USB interface
2
Power switch
3
Functional keys (at the bottom of the screen)
4
High voltage indicator
(It will illuminate with red when monitoring voltage is greater than 10V.)
5
Test terminal is used to connect test cable for measurement.
(+) positive terminal (current sampling terminal)
( - ) negative terminal (voltage output terminal, dangerous high voltage!)
GND Ground terminal (block the object to be test if the part under test is a
cable or a capacitor, the end is not connected.)
Warning: Do not connect negative termainl with ground terminal.
6
Exit and start/stop key
(the key has indicator, it will will illuminate with green when it activated.)
7
Arrow keys and OK key
8
Numeric keyboard
9
Specific functional shortcut key
10
Screen
11
Emblem

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4.2 Rear Panel
Figure 4-2 Rear Panel
No.
Description
1
Protective ground terminal
2
Fuse
3
Power socket
4
AC 220/110V adaptor
5
Handler interface
6
RS-232C /RS-485 interface (option)
7
LAN interface
8
Footswitch interface
4.3 Connection Method of Test Wire
4.3.1 Front Panel Wiring
Figure 4-3-1 Front Panel Wiring

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4.3.2 Connecting UNT with Shielded Terminal
UNT (unit under test) with shielded terminal, such as standard high resistance, device and equipment
with shielded enclosure, and etc. Please measure it as the following method.
Figure 4-3-2 Measure UNT with Shielded Terminal
Note: If UNT has shielded enclosure, the shielded enclosure cannot
connect to positive and negative.
4.3.3 Connecting UNT with Polarity
UNT (unit under test) with polarity, such as the capacitor with positve and negative polarity.
It must be meaured as the following method and should distinguish the positvie and negative.
Figure 4-3-3 Measure UNT with Positive and Negative
4.3.4 Connecting UNT with Nonolarity and Unshielded Terminal
The device and material without polarity and shielded terminal, such as electric wire and cable.
Please measure it as the following method. No special test requirements.
Figure 4-3-4 Measure UNT with Nonolarity and Unshielded Terminal

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Warning
1. Negative terminal has high voltage. It is recommended that connect the UNT in
discharge state to aviod electric shock.
2. Device with polarity (electroytic capacitor) should correctly connect to positive and
negative. Otherwise, it may cause damage to personal safety. Please take off after
dicharge a few seconds, to aviod electric shock.
Notes
3. Recommendation: Discharge the components in the instrument.
4. The instrument cannot short-circuit for long time, otherwise, the instrument will be
damaged.
5. In order to guarantee the accuracy and stability of measurement, please ensure that
the temperature and humidity of the environment meet the required conditions.
4.4 Open Circuit Zero Clearing
It is used to perform open circuit zero clearing for instrument. In order to achieve high precision
measurement, zero clearing calibration is a must.
Note: Test wire must be open circuit and suspended. Do not contact any object.
In the stop state, press [zero clearing] key at the bottom of the screen to enter zero clearing page.
Entity Key
Function
OK
The instrument exeutes open circuit for all ranges. If zero clearing is
successfully performed, data will be recorded in storage.
Esc
Exit zero clearing, the instrument will return to the stop state.
4.5 Start Test
Set the parameter---Correctly connect test wire---Press [On/Off] key to start test.

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5. Inspection and Installation
5.1 Packing List
Before using the instrument,
1. Check the appearance whether is damaged or scratched;
2. Check the packing list if has loss.
If the product is damaged or accessory is missing, please contact UNI-T sales department or
distributor.
Article
Quantity
Remarks
Insulation
resistance tester
1 piece
Power cord
1 piece
RS232
communication
line
1 piece
Test line
1 set
1 piece of red, green and black
Spare fuse
2 pieces
T1AL for 220V
Or T2AL for 110V
Pluggable wiring
terminal
1 piece
Footswitch
Download manual
1 piece
User’s manual
0 piece
Electronic user’s manual can download
from the official website.
5.2 Power Requirements
The instrument is deign to use under CAT Ⅱ, do not use under CAT Ⅲand CAT Ⅳ.
Befor boot the power, please make sure the power voltage and fuse is consistent with the voltage
selected by the AC SELECTOR switch on the back panel of the instrument.
Input Voltage
Frequency Range
Fuse
(slow-blow)
Rated
Power
110V
47-63Hz
2A
30VA
220V
1A
Warning: To prevent electric shock, please make sure that the power line is securely connect to the
ground.
5.3 Operation Environment
UT5583 insulation resistance tester is recommended for use under the following environmental
conditions.
Environmental Requirements

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Operating temperature
0℃～40℃, 20%～80%RH (non-condensing)
Temperature and humidity
range for guarantee the
accuracy
23℃± 5℃, 30%～65% R.H.
Storage temperature
-10℃～60℃, non-condensing below 80% R.H.
Altitude
≤2000 meters
5.4 Cleaning
To prevent electric shock, unplug the power line before cleaning.
Use clean cloth with slight water to wipe outer shell and panel and keep it dry. Avoid water enters the
instrument.
Do not clean the internal of the instrument.
Note: Do not use solvent (alcohol or gasoline) to clean instrument.
5.5 Handle
Handle is adjustable and can adjust to four positions, hold two sides of the handle to pull or
rotate as shown in the following figure.
Figure 5-1 Original Position Figure 5-2 Test Position
Figure 5-3 Remove Handle Figure 5-4 Lift Position
5.6 Daily Checking
To avoid the accident, please checking the instrument before using.
1. The instrument’s input power should conform to the specification and the power configuration
should be correct.
2. The instrument should be securely connecte to the ground.
3. Test line material is sound, no crack, break and damage.

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6. <Test> Display Page
6.1 <Test> Display Page
Boot-up or press [Test] key to enter [Test] page; Test can only be started at test page.
<Test> display page is mainly used to display measured results, test state and sorting results.
5 common function can be set at this page, including
Voltage —output voltage setting
Speed —test speed setting
Range —measuring range setting
Upper limit, lower limit: it can set when comparator function is enabled, refer to Section 8 comparator
setting.
Figure 6-1<Test> Page
Charge State
Test State
Discharge State

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6.1.1 [Voltage] Setting
Meauring volatge of UT5583 is 1.0V~1000VDC, when voltage <10V, the voltage step is 0.1V; when voltage
≥10V, the voltage step is 1V.
Setting Steps of Voltage
1. In the stop state, press [Test] key to enter the test page or press [Setup] key to enter the main
setting page.
2. Use the arrow key to select the [Voltage] field.
3. Use the function key at the bottom of the screen to direct select the pre-set voltage or use numeric
keyboard to input voltage value.
6.1.2 Test [Speed]
The instrument provides three test speed (slow, middle and fast). The slower the speed, the more
accurate and stable the test result.
Usually, when the user manually tests the device, use slow speed. If used for PLC and other automation
equipment online test, please choose middle or fast speed.
In general, use slow speed when test device
Setting Steps of Test Speed
1. Press [Test] key to enter the test page or press [Setup] key to enter the main setting page.
2. Use the arrow key to select the [Speed] field.
3. Use the function key at the bottom of the screen to select [Speed].
Function Key
Setting
Slow
500 ms/time
Middle
100 ms/time
Fast
30 ms/time
6.1.3 Test [Range]
Refer to section 14 Specification to learn more about the resistance range in different voltage and
scale.
The accurate range is relate to the accuracy of measurement. The wrong range will make the
measurement results unable to achieve the required accuracy.
There are three ways of measuring range.
Table 6-1 Description of Measuring Range
Measuring Range
Description
Pros
Cons
Automatic
The instrument will
automatically select the
best measuring range
according to the
User
participation is
not required.
The automatic
range needs to
predict the range
and the test speed

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resistance nominal
value, measuring range
number will
automatically set in
range filed.
will be lower than
the manual range
way.
Lock
The instrument will
always perform the test
by user-specified range.
Test speed
reaches to the
fast.
User need to select
the proper range.
Nominal
The instrument will
automatically select the
best range for testing
based on the nominal
value.
The best way for
sorting test.
Test speed
reaches to the
fast.
Only for sorting test.
Setting Steps of Measuring Range
1. Press [Test] key to enter the test page or press [Setup] key to enter the main setting page.
2. Use the arrow key to select the [Range] field.
3. Use the function key at the bottom of the screen to select [Range].
Function Key
Setting
Automatic Range
The instrument will automatically select the range.
Locked Range
The instrument will be locked at the current range.
Nominal Range
The instrument will automatically select the best range based on the
nominal value.
Increase +
Increase the measuring range number, and in the meanwhile, the
measuring range will change to locked range.
Decrease -
Decrease the measuring range number, and in the meanwhile, the
measuring range will change to locked range.
1. In automatic range, some component (such as CBB capacitance) cannot correctly
select the measuring rang. This kind of condition is normal. Change the measuring
range to locked range can aviod such situations.
2. It is recommeded to use locked range when measuring leakage current.
3. Automatic range is not situable for sorting measurement.
4. For sorting, please select the nominal range.