UNI-T UT15A Voltage Indicator Instruction Manual
- October 30, 2023
- UNI-T
Table of Contents
UNI-T UT15A Voltage Indicator
Product Information:
The product is a digital multimeter with three different models: UT15A, UT15B, and UT15C. The manufacturer of the product is Uni-Trend Technology (Dongguan) Limited in Guang Dong Province, China. The headquarters of the company is in Hong Kong.
Product Usage Instructions:
- Open the battery cover and remove the anti-leakage piece before using the device. Refer to content 3: instrument layout 13 for more information.
- Choose the appropriate model: UT15A, UT15B, or UT15C.
- Connect the device to the circuit being tested.
- Turn on the device by pressing the power button.
- Select the desired measurement function using the function dial.
- Take the measurement by placing the test leads on the appropriate points in the circuit.
- Read the measurement result on the display screen.
- Turn off the device by pressing the power button again.
Note: Always use caution and follow safety precautions when working with electrical circuits.
1) Introduction
Notice:
please open battery cover and remove antileakage 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 international safetv standards.
- 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 IC 61010 and IC 61243-3.
- Single pole phase indication
- 2 pole phase rotation indication
- LED& LCD display (UT15C)
2) 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 specified, the protection provided may be impaired.
- 4 Warning! Warns of potential danger, refer to the instruction manual to avoid personal injury or damage to the meter.
- 1 Caution! Dangerous voltage. Danger of electrical shock
- Continuous double or reinforced insulation complies with IEC536, 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, IEC 61010 Voltages above 75V DC or 50V AC may constitute a serious shock hazard.
- 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 meter.
- Check the test probes for damaged insulation or exposed metal. Check the leads for continuity.
- Do not apply more than the rated voltage, as marked on the meter between the terminals or between any terminal and ground.
- Do not use or store the meter in an environment of high temperature, humidity, fumes, vapour, gaseous, inflammable and strong magnetic field. The performance and safety of the instrument and the user may be compromised in such circumstances.
- Disconnect circuit power and discharge all high 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. A leaking battery will damage the meter.
- The meter may only be opened by a qualified service technician for calibration and repair.
Instrument Layout
- Test Probe (-) L1
- Test Probe (+ L2
- LED’s for voltage indication
- LED for single-pole test
- Right & Left LED, phase rotation indication
- LED for continuity
- LCD for voltage display (only UT15C )
- Contact electrode for the double-pole test of phase rotation and single-pole test
- Torch button on the back
- Positive LED
- Negative LED
- Battery Compartment
- Anti-leakage piece
Carrying out measurements
Perform a self test of the unit. Connect the two test probes L1 and L2. The
continuity LED (6) will be lit and an audible tone should be heard
Before any test check the unit on a known voltage source.
If the unit is defective it should be put out of service and returned to uni-
trend for repair.
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 30 s. 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 pole voltage detection
Single-pole Voltage Detection Test
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 unfavourable conditions
such as an 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 will indicate continuity below 400 Kohm
Note: The continuity test is only possible when batteries are installed and in good condition
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 B 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 1.5 V AAA (LRO3) batteries, checking
the correct polarity. Replace the battery cover and turn 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
Manufacturer:
Uni-Trend Technology (Dongguan) Limited
Dong Fang Da Dao
Bei Shan Dong Fang Industrial Development District Hu Men Town, Dongguan City
Guang Dong Province
China
Postal Code: 523 925
Headquarters:
Uni-Trend Group Limited
Rm901, 9/F, Nanyang Plaza
57 Hung To Road
Kwun Tong
Kowloon, Hong Kong
Tel: (852) 2950 9168
Fax: (852) 2950 9303
Email: [email protected]
http://www.uni-trend.com