Micro-Ohmmeter Test Leads This video will describe the color coding
of our test leads and correct connection method to our micro-ohmmeters.
AEMC offers many different Kelvin test probes that are designed to work with our line of
Micro-ohmmeters.
We currently stock 14 different part #s for these leads.
More importantly, these Kelvin probes have different combinations of color coding on
their leads.
Our Micro-Ohmmeter instruments also have color coded terminals on the instrument’s front
panel.
These colored terminals do not always correlate with the test lead colors.
This makes connecting the leads more work than just matching the colors.
We will now describe the different color combinations and the correct connection method to our Micro-Ohmmeters.
Instrument Front Panel: All of our Micro-Ohmmeters have 4 terminal
connections for Kelvin measurement.
These consist of 2 pairs of terminals with each pair containing a “C” and a “P”
connection, for Current sourcing and Potential sensing respectively.
1 pair of these is RED and 1 pair is BLACK.
Conversely, each handheld Kelvin probe has a Current injection lead and a Potential sensing
lead.
When connecting to the instrument, each of the handheld probe’s 2 leads should be connected
to a “C” and “P” terminal pair on the instrument.
The same orientation should be used for each probe.
Depending on the part #, the color coding of the handheld Kelvin probe may not match
the color coding of the instrument’s front panel.
This chart will show examples of our Kelvin probes and color codes.
We have 3 combinations for our 6240 and 6250 and 1 combination for our 6292.
We will now walk through the connection methods for the different probe styles and color combinations.
Style Group A for 6240 and 6250.
When using the five part #s from Style Group A, where the leads are Red/Red and Black/Black,
then the connections are going to be straight forward and the color coding will match up
to the instrument’s terminals.
Note: THESE LEADS ARE NOT APPROVED FOR USE WITH THE MODEL 6292!!
For Probes 1 and 2, Red lead to Red “C” and Red “P” on
the instrument.
Black lead to Black “C” and Black “P” on the instrument.
You still need to be mindful of their orientation in that the black lead connected to C2 and
the Red lead connected to C1 need to be the same side of the jaw for the most accurate
results.
Style Group B for 6240 and 6250.
When using the three part #s from Style Group B, where the leads are Red/Black and Red/Black,
then the connections will not match the color coding on the instrument’s terminals.
In these cases, the Black lead will always connect to a “C” terminal and a Red lead
will always connect to a “P” terminal or vice-versa.
Note: THESE LEADS ARE NOT APPROVED FOR USE WITH THE MODEL 6292!!
For Probe #1, Black lead to Red “C1”.
Red lead to Red “P1”.
For Probe #2, Red lead to Black “P2”.
Black lead to Black “C2”.
Style Group C for 6240 and 6250.
When using the four part #s from Style Group C, where the leads are Red/Black and Red/Black
and there’s a Red dot on the probe tip, then the connections will not match the color
coding on the instrument’s terminals.
In these cases, the Black lead will always connect to a “C” terminal and a Red lead
will always connect to a “P” terminal or vice-versa.
Note: THESE LEADS ARE NOT APPROVED FOR USE WITH THE MODEL 6292!!
For Probe #1, Black lead to Red “C1”.
Red lead to Red “P1”.
For Probe #2, Red lead to Black “P2”.
Black lead to Black “C2”.
Style Group D for 6292.
When using the two part #s from Style Group D for the 6292, the leads are Black/Red and
Black/Black and the probes are C-Clamps rated for 200A.
The connections will not match the color coding on the meter’s terminals.
In this case, the thicker Black leads will always connect to a “C” terminal and thinner
Red and thinner Black lead will always connect to a “P” terminal.
THESE LEADS ARE DESIGNED SPECIFICALLY FOR THE 200 Amp 6292.
For Probe #1, Thick Black lead to Red “C+”.
Thin Red lead to Red “P+”.
For Probe #2, Thin Black lead to Black “P-”.
Thick Black lead to Black “C-”.
We hope you’ve found this useful for properly connecting test leads to our micro-ohmmeters.
For more information about these and all other AEMC instruments please visit our website
at www.aemc.com or subscribe to our YouTube Channel to keep up to date on all future video
uploads.
Thank you.