UT15A/B/C
Operating Manual

Multifunction Voltage Testers

Introduction

Notice:
Please open battery cover and remove anti-leakage piece before using. (Refer to content 3 instrument layout 13)
Thank you for purchasing a voltage tester. This tester has been designed in accordance with the latest intemational safety standarde. The combivolt testers are fully automatic voltage indicators capable of measuring AC/DC voltage up to 690 V. Both units have visual and acoustic continuity indication.
Constructed in accordance with IEC 65010 and IEC 61243-3

• Single pole phase indication
• 2 pole phasse rotation indication
• LED & LCD display (UT150)

Safety notices

This manual contains information that must be followed for operating the meter safely and maintaining the meter in a safe operating condition. if this meter is not used in the manner spected the protection provided may be impaired.
Waming Wams of potential, refer to the instruction manual to avoid personal injury or damage to the meter.
Caution! Dangerous voltage. Danger of electical shock
Perfect display is only guaranteed within a temperature range of-10-50 relative humidity<85%.
Continuous double or reinforced insulation complies with IEC 536 class 11
CE Symbol of conformity, confirms conformity with relevant EU directives. The meter complies with EMC directives (89/336/EEC) Specifically standards EN 50081-1 and EN 50082-1 as well as the Low Voltage Directive (73/23/EEC) described in the standard EN 61010-1
The meter has been designed in accordance with the safety regulations for electronic measuring instruments, EN 61010-1, IEC61010
Voltages above 75V DC or 50V AC may constitute a serious shock hastard
Before using the meter check for physical damage to the casing in particular around the connectors. If the case is damaged do not use the mater
Check the test probes for damaged insulation or exposed metal Check the leads for continulty
Do not apply more than the rated voltage, as marked on the meter between the terminale in between any terminal and ground
Do not use or stare the meler in an environment of high temperature humidity, fumes, vapour, gaseous, infarmmable and strong magnetic Belt. The performance and safety of the instrument and the user may be compromised in such circumstances
Desconnect croull power and discharge all nigh voltage capacitors before testing resistance, continuity and diodes
Remove the batteries if the meter is not in use for a long period. Constantly check the battery as it may have leaked Aleaking batery will damage the meter.
The meter may only be opened by a quarilled service technician for railbartion and repa

Instrument Layout

1. Test Probe (L1
2. Test Probe (+) L2
3. LED’s for voltage indication
4. LED for single-pole best
5. Right & Left LED phase rotation indication
6. LED for cartruly
7. LCD for voltage diaplay (only UT15C)
8. Contact electrode for double-pole test of phass rotation and single-pole test
9. Torch button on the back
10. Poslive LED
11. Negative LED
12. Battery Compartment
13. Anti-Heakage piece

Carrying out measurements
Perform a self test of the unst. Connect the two lest probes L1 and 12 The continuity LED (6) will be it and an audible time should be heard.
Before any test check the unt on a known voltage source.
If the unit is defective it should be put out of service and returned to unt-trend for repar.

Voltage test

Always hold the test probes by the handles behind the finger guards. Observe the safety notices at all times.
An audible tone is present when an AC voltage and a negative DC voltage are indicated.
The maximum switch on time is 30s. When this time has elapsed you must wait 10 minutes before retesting.
Connect probes to voltage source observing polarity of the test probes L2 is positive probe, L1 is the negative probe.
For AC voltage the value is indicated on the LEDs (3) and on the LCD display (UT15C only). The and LEDs are illuminated and buzzer is audible.
For DC voltage connect probe L2 to the positive terminal and L1 to the negative terminal. The voltage is displayed on the LEDs and the LCD display (UT15C only). The positive LED (10) is illuminated. If the polarity is reversed the buzzer will sound. The negative LED (11) will be illuminated.

 Single pote voltage detection

Perform a function test prior to this test.
This unit can be used as a single pole voltage detector when batteries are inserted.
The single pole test is intended only as a quick check. The circuit must be checked again for the presence of voltage using the two pole method.
Connect test probe L2 to the voltage source and keep finger on the contact electrode (8). If an AC voltage above 100 V is present the LED (4) is illuminated and the buzzer sounds.
The single pole test can be negatively affected by unfavour- able conditions such as electrostatic field, good insulation etc.

Continuity test

The continuity test is only possible when batteries are inserted and in good condition.
Ensure the circuit under test is not live.
Connect test probes L1 and L2 to the circuit. The continuity LED (6) will illuminate and the buzzer will sound.
The unit indicate continuity below 400 Kohm

Phase rotation test

Perform a function test prior to this test.
This unit can determine the phase rotation within a three phase supply.
Connect test probe L2 to the supposed phase 2 and the test probe L1 to the supposed phase 1. If the R LED illuminates the phases are in the correct sequence 1 to 2.

Connect test probe L2 to the supposed phase 3 and test probe L1 to the supposed phase 2. If the R LED illuminates the phases are in the correct sequence 2 to 3. Connect test probe L2 to the supposed phase 1 and the test probe L1 to the supposed phase 3. If the R LED illuminates the phases are in the correct sequence 3 to 1.
During phase rotation test touch the contact electrode.
If the L LED illuminates then the phase sequence is anti clockwise.

Maintenance

Do not attempt to repair this unit. There are no user serviceable items in this unit. Never attempt to open the casing apart from the battery cover.
Do not use the instrument if there is any physical damage to the case or test leads.
The outside of the unit can be cleaned with a soft damp cloth only. Do not use abrasive or chemical cleaning agents.
Changing batteries
Turn the battery cover by 90 degrees anti clockwise. Remove the cover and take out spent batteries. Replace with 2 off 1.5V AAA (LR03) batteries, checking the correct polarity.
Replace the battery cover and trun by 90° clockwise.
Spent batteries should be disposed of responsibly and with compliance with current recycling and disposal regulations.
Calibration
The recommended calibration interval for the UT15A/UT15B/UT15C is 12 months.

Specifications

Voltage	UT15NUT15B	UT15C
Voltage display	12 – 690 V AC/DC	12 – 690 V AC/DC
LED Resolution	12,24,50,120,230 400.690	12,24,50,120,230 400.690
LCD Resolution		( 12-690V AC/DC ) +/- 3 % + 8 digits
Voltage detection	automatic	automatic
Acoustic signal	AC voltage – DC voltage	AC voltage – DC voltage
Polarity detection	Full range	Full range
Response time	LED < 0.1s	LED < 0.1s, LCD<2s
Frequency range	0 – 400 Hz	0 – 400 Hz
Peak Current	Is < 0.3A/is(after 5s) <3.5mA	Is < 0.3A/is(after 5s) <3.5mA
Operation time	30s	30s
Recovery time	10 min	10 min
Auto power on	<12 V AC/DC	<12 V AC/DC

Single Pole

voltage indication
Voltage range	100 – 690 VAC	100 – 690 VAC
Frequency range	50 – 400 Hz	50 – 400 Hz

Continuity
Measuring range	1 0 – 400 Kohm	0 – 400 Kohm

Phase rotation test
Voltage range	100 – 690 V	100 – 690 V
Frequency	45 – 65 Hz	45 – 65 Hz
Over voltage protection	690 V AC/DC	690 V AC/DC
Power supply	2 x 1.5 LRO3 battery	2 x 1.5 LRO3 battery
Dimensions	255 x 70 x 28 mm	255 x 70 x 28 mm
Weight	200g	200g

*** END ***
This opeating manual is subject to change without notice
UNI-T®
UNI-TREND TECHNOLOGY (CHINA) CO., LTD.
No6, Gong Ye Bei 1st Road,
Songshan Lake National High-Tech Industrial
Development Zone, Dongguan City,
Guangdong Province, China
Tel: (86-769) 8572 3888
http://www.uni-trend.com

Documents / Resources

UNI-T UT15C Digital Voltage Detector [pdf] Instruction Manual UT15C Digital Voltage Detector, UT15C, Digital Voltage Detector, Voltage Detector, Detector

References

• User Manual