Simpson 2 Series - Internal Batteries; Frequency Response

General Description
ample, ‘‘+2% of FS” is equivalent to saying ''*1 division
of DC scale.'' This is an exact method when measuring DC
and close enough for practical purposes on the ohms, AC,
and db scales.
INTERNAL BATTERIES
There are five 1.5 volt batteries inside the instrument.
These are used for the ohmmeter circuits. One large cell
is used to furnish 1.5 volts for the R x 1 and R x 100 ran-
ges. Four smaller cells are added in series to furnish
7.5 volts for the R x 10,000 range.
Each battery is held in place with two special spring clips
which also serve as battery contacts. The polarity symbols
are marked on the panel. Always observe polarity when
replacing batteries.
FREQUENCY RESPONSE
Your Simpson Model 270 Series 2 has an excellent frequency
response for A.C. and A.F. voltage measurements. It is
essentially ''flat" through the range from 20 cycles per
second up to 30,000 cycles per second. See pages 17 and
19 for frequency response curves.
TRANSPORT
It is advisable to shunt the meter movement during trans-
port. This is readily ‘achieved by setting the function
switch at D.C. and the range switch at 500MA.
I4.