Transmille 2080 - Manual (Page 2)

Testing 16 th Edition Instruments
Using the 2080
Page 2 of 5
Application Note - 2080 User Guide.doc • V1.10
Testing the Continuity measurement Function
The Continuity, or low resistance function measures low resistance, measured in ohms.
To check the accuracy of this function the 2080 has 3 precision low value resistors. Note that the
tester will also measure the resistance of the test leads and connections as well. Many testers have a
null function to ‘zero’ out this lead resistance before making a measurement. Please see the
instructions for your tester on how to use this function.
1: First Null out test leads. If your tester does not have a null function note the reading obtained with
the test leads shorted together and take this reading off all other readings.
2: Connect the test leads to the ‘common’ and the ‘0.5 Ohms’ terminals as shown above.
Select the lowest range on the tester & record the reading displayed on the tester.
Allow readings from 0.4 Ohms to 0.6 Ohms ± 1 digit.*
3: Connect the test leads to the ‘common’ and the ‘2 Ohms’ terminals. Select the range**, and record
the reading.
Allow readings from 1.85 Ohms to 2.15 Ohms ± 1 digit.*
4: Connect the test leads to the ‘common’ and the ’10 Ohms’ terminals. Select the range**, and
record
the reading.
Allow readings from 9.75 Ohms to 10.25 Ohms ± 1 digit.*
** Select the range on the tester so as to take one reading from each range on the tester.
For example if the tester had a 2 Ohm, 20 Ohm & 200 Ohm range use the 2 Ohm to measure
0.5 Ohm, the 20 Ohm range to measure 2 Ohm & the 200 Ohm range to measure 10 Ohm.
Common Problems
Solution
Tester reads over range The test leads are open circuit. Note some test
leads are fused and some use special
connectors. Check leads are OK
Reading unstable Check connections are clean and tight in the
sockets
Reading High Checked Tester is zeroed correctly with leads
shorted together. Poor leads will give a high zero