Simpson 650 - Page 16

OPERATING INSTRUCTIONS
NOTE
If the meter still cannot be made to zero;
a. Check the FUNCTION switch for the
correct transistor type setting.
b. Check for correct socket insertion or
lead connections to transistor.
c. The transistor may have high leakage
and should be checked as a power tran-
sistor.
d. The transistor 15 faulty.
7. Set the BETA switch to the Ico position.
8. Read the 0-10 scale and multiply by 10
for the amount of leakage in microamperes (100 џ
amps F.S.). Compare this reading with the normal
Ico specification from a transistor manual or a
manufacturer's data sheet. It should be approxi-
mately equal to that or less.
9. Set the BETA switch to the 250, 50, or
10 range (whichever produces the most satisfactory
deflection). The meter will indicate Beta directly
on the corresponding range selected. Compare this
reading with the value specified in a transistor
manual or manufacturer's data sheet.
b. Silicon Transistors.
For silicon transistors, use the procedure
12