Revised August, 2004
10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110
•
3-1
OPERATING INSTRUCTIONS
SECTION 3
OPERATING INSTRUCTIONS
The R1M-A is designed for bench-top or field operation. Use
the cables connecting their banana plug terminations to the
appropriate connectors explained in Section 2.2.
WARNING
DO NOT TOUCH ANY ALIGATOR CLIP WHILE DEPRESSING THE
TEST PUSHBUTTON. LETHAL VOLTAGES MAY BE PRESENT ON
THESE CLIPS.
3.1 Rotary Switch Functions
The two rotary switches manually scroll through the six
resistance and four voltage ranges.
Full scale on any range may be described as 2,000 (actually
1,999), since this is a 3 ½ digit meter. If the readings are
exceeding 1,999 counts, step to the next higher range. If the
readings are less than 2,000 counts, step down a range, so
that it will read 1,999 counts, or less. The decimal point is
located automatically for the correct reading.
If the selected range is too low for the value of the resistor
under test, the display will show over-range by showing “1”
on the display. Similarly, the under-range condition is
displayed by showing negative readings on the display. “-1”
is displayed on the display until the test button is pressed.
The POWER switch turns on the power to operate the unit or
turns off the power to the unit. Note that when power is
turned off, it may take several seconds to discharge circuit
capacity to completely blank the display. The black markings
seen have no effect and disappear when power is turned
back on.
WARNING
TAKING RESISTANCE MEASUREMENTS ON A POWERED OR
ENERGIZED COMPONENT COULD CAUSE SERIOUS HARM
TO THE OPERATOR AND/OR DAMAGE THE R1M-A. BE
SURE THE ITEM TO BE MEASURED IS DISCONNECTED
FROM OTHER COMPONENTS AND APPARATUS.
