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Calibration Procedure (Performance Check)-DM
505
g. Set the
dc voltage
calitxator
for
an output of
100
Vdc.
d. Connect the
red clip lead
o f
the female bnc
to
clip
lead adapter to the red binding post and the black clip lead
to
the DM 505 ground binding post.
h.
CHECK-that the display reads G01.0.
e. Connect the female bnc connector through a coax-
ial cable to the ac voltage calibrator.
i. SetthedcvoltagecalibratortoOVBndreconnectthe
coaxial cable to the ac voltage calibrator.
f. Press the VOLTS AC and 200 mV pushbuttons.
j.
S e t
the acvoltage calibrator for an output of 50 Vac
rms
a i
50 to 60 Hz.
g.
Set the ac voltage calibrator for an output of 5 Vac
rms at 50
Hz
to
60
Hz +0.2 Hz.
k. CHECK-that
the
display reads G7.2.
h. CHECK-that
the maximum display reading is
G22.4.
I. Set
the
ac voltage calibrator output to 0 V and
disconnect it from the DM 505.
i. Set the ac voltage calibrator output to
0
V and
disconnect it from the DM
505.
NOTE
I f
the
D M
505
does
not display the
correct readings
as stated in step
3
parts h and k, perform
Clock
5.
Check Normal Mode Rejection (Dc
Mode)
Adjustment of
the Adjustment
procedure
andrepeat
the
above
Common Mode Rejection Check
( D c
a. Connect the bnc female to dual banana connector
Mode).
to the VOLTS/R and LOW connectors.
b. Attach the bnc connector through a coaxial cable to
the
ac voltage calibrator.
4. Check Common Mode Rejection (Ac Mode)
c. Press the
VOLTS DC and 200 mV pushbuttons.
a. Connect the bnc female to dual banana connector
to the VOLTS/R and LOW connectors.
d. Set the AC Calibrator for 0.224V AC at 50Hz *0.2Hz
or 60Hz *0.2Hz.
b. Connect the bnc male to dual binding post connec-
tor to the bnc connector attached to the DM
505
front
e. CHECK-that
the maximum display reading is
panel.
G 1.0.
c. Connect the 1 kR resistor ktween the binding
f. Set the ac calibrator output to
0
V and disconnect it
posts
on
the dual binding post connector.
from the
DM 505.
REV
A
OCT 1979
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