Transmille 2080 - Manual (Page 3)

Testing 16 th Edition Instruments
Using the 2080
Page 3 of 5
Application Note - 2080 User Guide.doc • V1.10
Testing the AC voltage measurement function
Some insulation, multi function and installation testers can measure AC volts. This can be simply
checked as shown below.
WARNING : THIS TEST INVOLVES MAINS VOLTAGES AND CARE MUST BE
TAKEN TO AVOID ELECTRIC SHOCK.
1: With the 2080 unplugged connect up the tester to the 2080 as shown below and select the AC
voltage measurement function on the tester.
2: Plug in the 2080.
3: Record voltage displayed on meter. Allow 220V to 250V*
Common Problems
Solution
No voltage displayed 1: Test leads Open circuit
2: 2080 not plugged in to mains supply, check
Power LED on 2080 next to AC output sockets
3: Fuse blown on 2080
Testing the RCD function
RCD testers simulate a fault current between live and earth, this causes the RCD to trip. The time
taken for the RCD to disconnect the supply is shown on the Testers display usually in mill-seconds.
To test, it is necessary to check that firstly the tester is taking the correct current and also that the
display shows the correct time.
Usually testers have several current ranges plus a ‘5I’ function, which multiplies the current range set
by 5.
It is important to check more than one current range, as switches can get broken, leaving the
instrument stuck on one range. Good practice would be to check the 10mA and 30mA ranges and
also the operation of the 5I switch on the 30mA range (150mA).
It is also very important to check the tester is not taking too much current as an RCD will still trip, for
example you could be testing a circuit which should have a 30mA RCD, however due to a faulty range
switch on your tester is on the 300mA range and of course this will open any trip up to 300mA.