Advertisement
OPERATION
MODEL 615 ELECTROMETER
INTEGRATOR
ZERO
CROSSING
DETECTOR
:-I-- l
41.67
ms
bi
INTEGRATE
COUNT
ei
16.67 mS
16.67
Ins
SUFFER
STORE
PULSE
PRINT
COMMAND
CLOCK PULSES
.^
2000
3000
5000
(~OOU)
2000
FIGURE 9.
Timing
Diagram
for Model 615.
slide
switch
is identified
for either
117 or 234V co
avoid
an incorrect
sectinS.
The proper
fuse must be
used far
117 or 234V and can be changed by
removing
the fuse holder
cap on the rear
panel.
Refer
to Table
3 for proper
type
of fuse require*.
Z-12.
50 HZ LINE
POWER FREQUENCY OPERATION.
The Model
615
is shipped
for use with
60 Hz line
power frequency
unless
ordered
for 50 Hz operation.
The Model 615 will
operate
at either
50 or
60
Hz but line
frequency
noise
reJection
will
be degraded.
Field
conversion
from 60
Hz eo 50 Hz is not recommended since
the A to D con-
verter
would
require
recalibration.
TO co""erc
the
line
frequency
operation.
replace
the oscillator
ccys-
tal
Y501 as shown in Table
18.
18
0470
Advertisement
