10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110
•
3-1
OPERATING INSTRUCTIONS
SECTION 3
OPERATING INSTRUCTIONS
The R1L-D1 is designed for bench-top or field operation. Use
the cables (available from TEGAM), connecting their banana
plug terminations to the four binding posts I, +E, -
E, and -I. Set the shorting bar so that it does NOT connect -I
to -E, unless you plan to make 2 or 3-terminal
measurements. Note that the test current is actually AC, and
the + and - indications are used only to signify HIGH and
LOW, as well as to indicate that the +E and +I go together
and the -E and -I go together.
3.1 Pushbutton Functions
Operation of the Model R1L-D1 is essentially automatic and
extremely simple. There are only four pushbuttons, three
momentary and one latching.
The MODE pushbutton selects 4-wire, 3-wire, or 2-wire
operation. When power is turned on, it defaults to 4-wire
operation. Successive operations of this pushbutton will step
the unit through 3-wire and 2-wire operation, then back to
4-wire operation. Note that this is indicated by a 4, 3, or 2 at
the left end of the display.
The RANGE pushbutton will manually scroll through the five
ranges and auto-range. Default condition when power is
turned on is Auto-range. In Auto-range, the R1L-D1
automatically steps thru the ranges until the displayed signal
is between 20,000 and 199,999 counts. An asterisk in the
sixth character of the display indicates auto-ranging.
Full scale on any range may be described as 200,000
(actually 199,999), since this is a 5 ½ digit meter. If the unit
sees readings exceeding 199,999 counts, it will automatically
step to the next higher range. If it sees readings less than
20,000 counts, it automatically steps down a range, so that
