ATO UT512 Digital Insulation Tester Instruction Manual

UT512 Digital Insulation Tester
Instruction Manual

Insulation Resistance Tester

Introduction

Uni-Trend Model UT512 insulation resistance tester (hereafter, “the Meter”) is a handheld instrument designed primarily to make resistance/ insulation resistance measurement
Unpacking the Meter
The Meter includes the following items:
Table 1. Unpacking Inspection

In the event you find any missing or damage, please contact your dealer immediately.

Safety Information

This Meter complies with IEC61010 safety measurement requirement: Pollution Degree 2, Overvoltage
Category(CAT. Ill 600V) and Double Insulation.
CAT I: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient voltage overvoltages than
CAT. Il Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired
Danger identifies conditions and actions that pose hazard(s) to the user.
  Warning alerts users to avoid electric shock.
  Caution identifies conditions and actions that may damage the Meter and affect accurate measurement
  Operating Caution identifies conditions that user needs to take exra care during operating the Meter
Danger
Use of instrument in a manual not specifed by the manufactuer may impair safety features/protection provided by the equipment. Read the following safety information carefully before using or servicing the instrument.

• Do not apply more than 600V. Do not use the Meter around explosive gas, vapor or dust.

• Do not use the Meter in a wet environment. When using the test leads, keep your figures away from the lead contacts. Keep your figures behind the finger guards on the leads.

• Do not use the Meter with any parts or cover removed.

• When carrying out insulation measurement, do not contact the circuit under test.
    Waming

• Do not use the Meter if it is damaged or metal partis exposed. Look for cracks or missing plastic.

• Be careful when working above 33V rms, 46.7V ac rms or 70V DC. Suchvoltages pose a shock hazard.

• Discharge all loading of circuit under test after measuring high voltage. Do not change battery when the Meter is in wet environment.

• Place test leads in proper input terminals. Make sure all the test leads are firmly connected to the Meter’s input terminals.

• Make sure the Meter is turned off when opening the battery compartment.
  Caution

•  When performing resistance tests, remove all power from the circuit to be measured and discharge all the power.

•  When servicing the Meter, use only only the test leads and power adaptor with the same model number or identical electrical specifications.

• Do not use the Meter if the battery indicator ( )) shows a battery empty condition. Take the battery out from the Meter if it is not used for a long time.

• Do not use or store the Meter in an environment of high temperature, humidity, explosive, inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened.

• Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing. No abrasive and solvent should be used to prevent the surface of the Meter from corrosion, damage and accident.

• Dry the Meter before storing if it is wet.

International Electrical
Symbols International symbols on the Meter and in this manual are explained in Table 2.
Table 2. International Electrical Symbols

| Risk of electric shock
---|---
| Equipment protected by double or reinforced insulation.
| DC Measurement
| AC Measurement
| Grounding
| See Manual
| Empty of Built-In Battery
| Conforms to Standards of European Union

Battery Saver (Sleep Mode)
The Meter enters the Sleep Mode and blanks the display if there i no button press for 15 minutes. This is done to conserve battery power. The Meter comes out of
Sleep Mode when ON/OFF button is pressed and hold  for 1’second.
Battery Indication
There s a battery indicator shown on the upper left corner If the display. Please refer to Table 3 for detailed  explanation.
Table 3. Battery Indication

cannot guarantee accuracy.
| 10.7V ~ 11.1V. It means the battery is almost empty, replacing battery is necessary. At this status, the Meter can still output 500V and 1000V to measure, the measured accuracy will not be affected.
| 11.2V ~ 12.2V
| 12.2V or more

The Meter Structure
Below Figure 1 and Table 4 shows the Meter front structure and description Table 4. Meter Front Description

test lead )
20| GUARD: Grounding protection input terminal ( Connected to one-plug black test lead )
21| EARTH: High resistance measurement input terminal ( Connected to one-plug green test lead )
22| Testing leads:
Two-plug red test lead to one alligator clip. One-plug black test lead to one alligator clip. One-plug green test lead to one alligator clip.

Below Figure 2 and Table 5 shows the Meter side structure and description Table 5. Meter Side Description

Display
Table 6 and Figure 3 describe the display. Table 6. Display Description

Key Functions
Table 7. Key Description

ON/OFF| Turn on or off the Meter. Press and hold the button for 1 second to turn the Meter on. Press again to turn off the Meter.
The Meter defaults at 500V range and under continuous measurement of insulation resistance when turned on.
---|---
E-STOP| Emergency stop button. Press this button when the Meter crashes down and cannot turn off the power.
**CLEAR

| Short press to turn on or off the display backlight Long press to clear the stored data.
---|---
SAVE| Press to store the current measurement value. The maximum number of stored reading is 18. When the stored readings memory is full, the Meter shows FULL and stop storing. Press and hold CLEAR /      to clear the stored value in order to store the next measurement value.
LOAD| Press once to recall the first stored value.
Press again to exit Load feature.
Load feature can only be used when there is no high voltage output.
| When the insulation resistance measurement has no testing voltage output, press to select previous voltage range.
Under load mode: press to recall the previous stored value.
| When the insulation resistance measurement has no testing voltage output, press to select next voltage range.
Under load mode: press to recall the next stored value.
| When setting the timer for the measurement of insulation resistance or polarization index, press to decrement the time. The maximum length of time is 15 minutes and 30 seconds, the Meter will automatically carry out measurement.
When compare function is enabled for insulation resistance measurement, press to decrement a resistance comparing value.
After polarization index measurement, press to display polarization index, TIME 2 and TIME 1 insulation resistance values in sequence.
| When setting the timer for the measurement of insulation resistance or polarization index, press to increment the time. The maximum length of time is 30 minutes and 30 seconds, the Meter will automatically carry out measurement.
When compare function is enabled for insulation resistance measurement, press to increment a resistance comparing value.
After polarization index measurement, press to display polarization index, TIME 2 and TIME 1 insulation resistance values in sequence.
USB| Press once to start the data transferring to the computer via USB, USB symbol shows on the display.
Press again to stop the data transferring to the computer via USB, USB symbol disappears.
COMP| Set a pass / fail limit for insulation tests. The default value is 10M
TIME| Press to step through continuous, timed and polarization index measurements in sequence.
TEST| Press to turn on/off the output of insulation resistance test voltage.
IR| Press to initiate insulation resistance measurement
DCV| Press to initiate DC voltage measurement
ACV**| Pres to initiate AC voltage measurement

Measurement Operation

This section explains how to make measurements. Press and hold ON/OFF to turn on the Meter, press again to tum off the Meter. The meter defauls at 500V range and continuous measurement of insulation resistance when tumed on.
A. Measuring Voltage

Operating Caution

• Toavoid harm to you or damage to the Meter, please do not attempt to measure voltages2 higher than 600V or 600V rms, although readings may be obtained.
•  Special care should be taken when measuring igh voltage.

To measure voltage, set up the Meter as Figure 4 and do the following

1. Press DCV or ACV button to select DC voltage or AC voltage measurement
2. Insert the red and green test leads into EARTH and two LINE terminals
   When measuring DC voltage, if negative voltage is present on the red testlead, ” symbol will show on the display.

Note

• When voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test and remove testing leads away from the input terminals of the Meter.

Measuring Insulation Resistance Operating Caution

• When performing insulation resistance tests, remove all power from the circuit to be measured and discharge all the power.
• Operating the Meter must be very careful as it outputs dangerous voltage during measurement. Must make sure the tested object is firmed clipped, hands are away from the clips, then press TEST button to output high voltage.
• Do not short circuit the testing leads during high voltages output or test insulation resistance after high voltages output. This kind of incorrect operating may cause sparking and fire, which damages the Meter and cause personal injury.
• Do not measure over 10 seconds when:
  measuring resistance <2MQ with use of 500V.
  measuring resistance <5MQ with use of 1000V.
  measuring resistance <8MQ with use of 1500V.
  measuring resistance < 10MQ with use of 2500V.

To measure insulation resistance, set up the Meter as Figure 5 and do the following:

1. Press IR button to select insulation resistance measurement
2. When there i no testing voltage output, press   and button to select 500V, 1000V, 2500V or 5000V voltage range.
3. When performing insulation resistance tests, remove all power from the circuit to be measured and discharge all the power.
4. Insert the red test lead into two LINE terminals, the black one into GUARD and the green one into EARTH
5. Connect the red and green alligator clip to the circuit to be measured, negative voltage outputs from LINE terminal
6. Choose one of insulation resistance measurement modes shown as below.

Continuous Measurement

• Press TIME button to select coninuous mode, there is no timer icon on the LCD.
• Press   and hold TEST button for 1 second to begin and output insulation resistance test voltage,
• TEST button lights up, 4 blinks on every 0.5 seconds. Press TEST button to tum off the voltage output, when measurement is completed. TEST button lights off, /A disappears. The LCD shows the current insulation resistance  easurement value.

b) Timed Measurement

• Press TIME button to select timed mode, the LCD displays TIME 1 and G symbols.
• Press and buttons to setthe time (00:10~15:00). Within 1 minute, the time increment or decrement by every 5 seconds. Afterward, the time increment or decrement by every 30 seconds
• Then press and hold TEST button for 2 second to carry out timed measurement. TIME 1and A are displayed and blinked on the LCD on every 0.5 seconds
• When the set time is reached, the test voltage output will be turned off, and the measurement will be automatically stopped. The LCD displays the insulation resistance reading

c) Polarization Index (P}) Measurement

• Press TIME button to select timed mode, the LCD displays TIME 1and G symbols.

• Press and   buttons to set the time (00:10~15:00) Within 1 minute, the time increment or decrement by every 5 seconds. Afterward, the time increment or decrement by every 30 seconds

• Press TIME button again. TIME 2, Pl and G symbols appear on the LCD,

• Press and buttons to set the time (00:15~15:30).
  Within 1 minute, the time increment or decrement by every 10 seconds. Afterward, the time increment or decrement by every 30 seconds
  Then press and hold TEST button for 2 seconds to carry out the measurement

• TIME 1 and A are displayed and blinked on the LCD on every 0.5 seconds before TIME 1 set time is reached.

• TIME 2 and A are displayed and blinked on the LCD on every 0.5 seconds before TIME 2 set time is reached.

• When the two set time are reached, the test voltage output will be turned off and the measurement will be automatically stopped. The LCD displays the polarization index reading.

• Press  and tostep through the polarization index, TIME 2 and TIME 2 insulation resistance readings.

alculation Tips
Pl = 3-minute ~ 10-minute resistance/30-second ~ 1-minute resistance

d) Compare Function

• Press COMP button to select compare feature. COMP symbol displays on the LCD.
• Press<4and b buttons to set the compare value
• You can choose the compare value from 10M ©, 20M22, 30MQ, 40M<, 50Me2, BOME2, 70M22, BOM<2, 90M<, 100M<2, 200M<, 300Me2, 400M2, 500M€2, 600ME, 700M<, 800M<2, 900Me 160, 260, 360, 460, 560, 660, 760, 8GQ, 960, 106, 2062, 330G, 406, 5062, 60GR, 7060, 806, 90GL, 10060
• Press and hold TEST button for 2 seconds to carry out the measurement
• The NG symbol will display if the insulation resistance value is smaller than compare value. Otherwise GOOD symbol will be displayed

Using Power Adaptor
Refer to Figure 6 for the use of power adaptor.

1. Open the side safey shutter, then you will see there is a power adaptor input terminal.
2. Make sure the Meter is power off and Insert the UT512 power adaptor to the input terminal
3. It is highly recommended to take out all the batteries    when you are using the power adaptor.
4. Make sure the Meter is power off when you disconnect the UT512 power adaptor from the Meter.
5. Itis highly recommended to use Uni-Trend supplied  UT512 power adaptor to avoid unnecessary danger

Connecting USB Interface
See Figure 7 for USB interface connection

1. Install the included software, the installation guide can be seen from the CD.
2.  Open the side safety shutter, then you will see there isa USB port
3. Insert the included USB cable to the Meter’s USB port and the other end to the computer.

Maintenance

This section provides basic maintenance information1 including battery replacement instruction.
  Warning
Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.
A. General Service

• Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
• Todlean the terminals with cotton bar with detergent, as dirt or moisture in the terminals can affect readings
• Tur the Meter to OFF when itis not in use
• Take out the battery when it is not using for a long time.
•  Do ot use or store the Meter in a place of humidiy, high temperature, explosive, inflammable and strong magnefic field
• If the Meter is wet, dry it before use.

B. Replacing the Battery
Warmning
To avoid electric shock, remove all the test leads from the Meter when replacing the batteries.
Operating Caution
Be careful the polarity is correct when installing batteries.

• Do not use the Meter if the battery indicator ( =3) shows.
• Do you carry out measurement during the battery compartment is open. Follow Figure 8 and proceed as follows to replace the battery
• Tum the Meter to OFF and remove all connections from the terminals.
•  Remove the screw from the battery compartment, and separate the battery compartment from the case bottom
•  Replace with 8pcs of new 1.5V (LR14) batteries
•  Rejoin the case bottom and battery compartment, and reinstall the screw.

Specifications

Safety and Compliances

Certification|
---|---
Compliances| IEC 61010 CAT.III 600V overvoltage and double insulation standard

General Specifications

areas.
Computer connection| Via USB interface.
Data Logging and Recall| 18
Autorange| The Meter automatically selects best range
Warning| ,A and red light will on.
Test Voltage| Automatically source the voltage.
COMP Measurement| Use the Compare function to set a passffail compare level for the insulation measurements.
PI Measurement| Polarization Index is the ratio of insulation resistance. Preset the timer for two points and the Meter will carry out the measurement automatically.
TIME| To carry out measurement by setting a specified time within 15 minutes.
Overloading| Display OL on insulation resistance range
Battery Indicator| Display
Icon Display| Equips with function and battery indicator icons.
Current Consumption| Maximum: around 600mA Average. around 20mA
Operating Temperature| -10″C-40″c (14’F-104-F)
Storage Temperature| -20t -60t (-4T-152’F)
Relative Humidity| 5 85% @ -10°C-40t below; 4 90% @ -20t–60-C:
Battery Type| 8pcs of 1.5V (LR14) batteries or power adaptor (input voltage 230V, 50/60Hz, 50mA input DC14.5V, 600mA).
Power adaptor is optional at extra cost.
Dimensions (HxW xL)| 202 x 155 x 94 mm
Weight| Approx 2kg (including battery)

Accuracy Specifications
Accuracy: * ([% of reading] + [number of least significant digits), guarantee for 1 year.
Operating temperature: 18C~28’C
Relative humidity: 45~75%RH
A. Voltage Measurement

| DC Voltage| AC Voltage
---|---|---
Measurement Range| 30 ~ 600V| 30V~600V (50/60Hz)
Resolution| 1V
Accuracy| (2%+5)| <100V:   (2%+8)
100V:   (2%+5)

B. Insulation Resistance Measurement

1mA-1.2mA @ 2.5M0
Short Circuit| Less than 2.0mA
Accuracy| 10015 – 100Mi2:±(3%+5)
100Mi2 – 10GO: ±(5%+5)
10G11 – 100G1I:±(10%+5)

Operating Caution
Atany output voltage, when the tested resistance is less than 10M <, the testing time cannot exceed 10 seconds continuously.

END*
This operating manual is subject to change without notice:

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