LD60A
4-5
OPERATING INSTRUCTIONS
Operation with TC/DE Test Cell (ASTM D877 Standard)
1.
Adjust the test cell electrode by use of the measuring rod located on the test cell in the
following manner.
a.
Remove the measuring rod by unscrewing it from its threaded holder.
b.
Release the setscrew, which holds the adjustable electrode in place on the test
cell.
c.
Place the measuring rod between the electrodes.
d.
Move the adjustable electrode in until snugly against the measuring rod.
e.
Moderately tighten setscrew to secure this position.
f.
Remove the measuring rod and place it in the holder for safekeeping. (Distance
between the electrodes should be 0.100 of an inch if measuring rod is not used.)
2.
Fill the test cell with test sample of oil according to standards procedure.
3.
Place the test cell in the test chamber of the unit and close chamber lid.
4.
Turn on AC power switch.
5.
Select 3000 volts per second rate of rise.
6.
Move the start switch to start position when stand time requirements have been met.
7.
High voltage will come on; the unit will automatically raise the voltage to the desired rate
per second until failure occurs.
8.
If a failure occurs, the voltage will shut off, the failure light will illuminate, and the break-
down voltage will be indicated on the kilovolt meter.
9.
To return to zero, switch the stop-reset switch to stop/reset.
10.
Continue test as per ASTM D877.
11.
Remove the test sample of oil and repeat the above procedure for other samples.
NOTICE:
The voltmeter may continue to rise slightly after the failure indicator is tripped.
This meter response delay should be ignored. The final voltage reading is the
breakdown point.
