Simpson 2 Series - Page 26

Operating Instructions
ward”? and backward” resistance such as in semi - con-
ductor rectifiers, switch back and forth between the two
D.C. positions of the function switch to reverse this
polarity.
NOTE
The resistance of such rectifiers will measure differ-
ent values on different resistance ranges of the Model
270 Series 2. Thus, a crystal diode which measures
80 ohms on the R x 1 range may measure 200 ohms on
the R x 100 range. This is normal and is a result of
the diode characteristic. The difference in values
does not indicate any fault in the ohmmeter.
6. Read the indication on the OHMS arc at the top of the
dial. Note that this arc reads from right to left for
increasing values.
7. Multiply the reading by the multiplier factor at the
switch position for the resistance value in ohms. K“
on the dial stands for ‘‘thousand’’.
8. Resistance measurements in transistor circuits should
be made only after the transistor has been isolated
from the circuit. i
MEASURING DIRECT CURRENTS,
0 TO 50 MICROAMPERES
CAUTION
Never connect the test leads directly across any
voltage when the Model 270 Series 2 is used as a
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