English
UNITED KINGDOM •
Customer Service e-mail: customerservice@clasohlson.co.uk Returns Address Clas Ohlson Ltd, The Archway, 7-9 West Street, Reading, Berkshire, RG1 1TT
UNI-T 18C Voltage Tester
Art.no 36-8125 Model UT18C
Please read theentire instruction manual before using theproduct and
then save it for future reference. We reserve theright for any errors in text
or images and any necessary changes made to technical data. If you
have any questions concerning technical problems please contact our
Customer Services.
Safety
First read theentire instruction manual and make sure that you have
understood all theinformation regarding safety and maintenance in order
to be able to use thevoltage tester in asafe way.
Warning:
• The function of thevoltage tester should be checked on aknown
voltage source before measuring is commenced.
• Only grip thetest probes by thehandles. Never touch thetips of
thetest probes.
• The voltage tester must only be used on circuits within thespecified
measuring range (690V).
• The voltage tester should not be connected to avoltage source for
more than 30 seconds at atime.
• Do not use thevoltage tester if it is in any way damaged or malfunctioning.
• Do not use thevoltage tester in awet or humid environment.
Accurate readings can only be guaranteed within thetemperature
and humidity ranges specified in theSpecifications section below.
• Safety can no longer be guaranteed if thevoltage tester does not
display reliable readings.
• When using thevoltage tester, only touch thegripping surfaces of
thetest probes, never touch themetal tips.
Symbols
Product description
The UT18C is anadvanced voltage tester capable of testing AC and
DC voltages from 12V to 690V. The voltage tester is capable of RCD
testing, phase sequence testing and continuity testing. It is designed to
be suitable for use by professional electricians and homeowners alike.
Features
• Measures alternating current and direct current from 12 V to 690 V
• Phase sequence test
• RCD test
• Continuity test
• Overvoltage protection for voltages over 690 V AC/DC
• Has aningress protection rating of IP65. Dust-tight and water-resistant
Instructions for use
Measuring DC voltage
Touch thetips of thetest probes against theobject under test.
For voltages over 12V thevoltage tester starts automatically.
If theplus sign lights up, thepositive test probe (+) is connected to
thepositive terminal of theobject under test.
If theminus sign lights up, thenegative test probe (−) is connected to
thenegative terminal of theobject under test.
The voltage level is indicated by LEDs: ± 12, 24, 36, 50, 120, 400, and 690.
Measuring AC voltage
Touch thetips of thetest probes against theobject under test.
Warning, potential hazard. Follow theinstructions in this
instruction manual.
Continuity (closed circuit test)
RCD test button
The voltage tester should not be disposed of in your bin as
household waste. The voltage tester should be regarded
as waste electrical and electronic equipment and taken to
your local household waste recycling centre for disposal in
accordance with local regulations. If you are unsure how to
proceed, contact your local council.
3
42
1
5
6
7
8
9
10
11
12
16
15
14
13
1. Voltage indicators (LED)
2. Test probe electrode (L1)
3. Electrode cap
4. Test probe electrode (L2)
5. High voltage indicators
6. Torch
7. AC voltage indicator
8. Continuity indicator
9. RCD test indicator
10. Phase sequence test indicator
11. Polarity indicator
12. LCD display
13. Battery cover
14. HOLD function
15. Torch/Buzzer on/off
16. RCD test button
17. Voltage measurement
18. Silent mode
19. HOLD function
20. Battery low, replace at earliest
convenience to prevent erroneous
readings and therisk of dangerous
consequences
21. AC voltage measurement
17
18 19 20
21
24
22
23
17
18
25
26
27
28
23
21
22
2019
22. DC voltage measurement
23. Frequency measurement
24. Voltage levels (LED)
25. High voltage
26. Continuity (closed circuit test)
27. RCD test
28. Phase sequence test
For voltages over 12V thevoltage tester starts automatically.
When thetested circuit has alternating current (AC), theAC voltage
indicator lights up.
The voltage level is indicated by LEDs: ± 12, 24, 36, 50, 120, and 400.
Note: If thevoltage under test is less than 5V, thetester may not detect it.
Ver. 20201216