10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110
3-3
OPERATING INSTRUCTIONS
NOTE: The amount of current available for charging the
battery decreases as lower resistance ranges are selected. In
the 2 m
Ω
range, the current supplied to the resistance under
test exceeds the charging current, and the battery will be
drained.
To obtain the best accuracy, allow the R1L-BIR1 to warm up
for 15 minutes on the 20
Ω
range before making
measurements. Even if in battery operation, this will not cause
appreciable battery discharge.
Using the Kelvin Clip cables
Plug one Kelvin Clip cable dual banana plug across the +E and
+I binding posts, and plug the other Kelvin Clip cable dual
banana plug across the -E and -I binding posts. Note that in
both cases, the small "I" marked on the dual banana plug
should go into the respective I binding post.
If Kelvin Clip cables are not used, a pair of shielded cables
may be utilized. As occurs in the Kelvin Clip cables in the
above paragraph, one cable should have its shield connected
to the “+I” binding post and its center conductor connected to
the +E binding post. Similarly, the other cable should have its
shield connected to the -I binding post and its center
conductor to the -E binding post. It is also recommended that
the resistance of the cables should not exceed 350
m
Ω
/conductor.
NOTE: Particularly in the 2 m
Ω
range, where a test current of
approximately 1 . 4 A is used, excessive lead resistance will
prevent an accurate measurement.
Set the Range Switch to the desired measurement range and
read the resistance on the liquid crystal display. If the
resistance is higher than the selected range, the display will
show a "1" and three blank digits, indicating over-range. The
decimal point will also appear in the proper location for the
selected range.
