Calibration Adjustments; Rms Converter - Fluke 8050A Instruction Manual

MAIMTENANCE
CALIBRAHON ADJUSTMENTS
Table 4-10.
US Jumper
Positions
DISPLAY
(ALL
JUMPER
PINS INSTALLED)
JUMPER CONFIGURATION
AS VIEWED FROM REAR OF
8050A
LOW
HIGH
1.8773 1.8879
4
i i i
i
1
1
1
1
I
1.8667
1.8772
4 4 4 4
1
i
1
1
1
1
1.8562 1.8666
4 1 4 4
4
1
! I
1 1
1.8459 1.8561
4 4
4
1 1
i
1
i 1 1
1.8356
1.8458
4
J'
1.8255
1.8355
!
1 1
1 I
4
4
4
4
1.8155
1,8254
4
_j4
I
4
4
1 i 1 1
1
1.8056
1.8154
4
1
i
i
1.7958 1.8055 1
4 4 4
4
1.7861 1.7957
1
4
4 4
1
1
! 1 1 1
1.7765 1.7860
1
4 4 4 4
1
I
1 1 i
1.7670 1.7764
1
4
4
1
1
1 1 1 1
1
1.7576
1
.7669
1 1
4 4
4
1 i 1 1 1
1.7483
1.7575
1 1
4 4
1
1 1 1 1 1
1.7391
1.7482
11,44
1.7300
1.7390
NO
JUMPER
INSTALLED
SELECTABLE JUMPER CONFIGURATION FOR DC CALIBRATION (VOLTAGE REFERENCE
VR1
CALIBRATION NETWORK,
U5).
9.
Perform
the Calibration Adjustments.
4-54,
RMS CONVERTER OFFSET ADJUSTMENT
PROOEDURE
4-55.
The rms
converter
offset
adjustment should
be
performed
if
R29
does not have a
sufficient
adjustment
range or
if
the
8050A
display
reading
is
greater
than
.0040
in step 3 of
Table
4-9.
Use
the
following procedure
to
set
the
initial offset
of the
RMS
Converter:
1.
On
the
8050A,
set
the
POWER
switch to
ON.
2.
Select the
AC
V
function,
2V
range.
3.
Connect
the
DMM
Calibrator
to
the
8050A
as
follows:
HI
to
the
V
/
kO/
S input connector and
LO
to the
COMMON
input connector.
4.
Adjust
the
DMM
Calibrator for l.OOOOV ac
rms,
at
400Hz.
5.
Turn on
the
DMM
Calibrator.
6.
With
the
DMM,
measure
the voltage at
pin 7
of
the
RMS
Converter with reference
to
ground
(TPl). This voltage
must be U.OV
±
20
mV.
Record
this
voltage
to
the nearest
0.
1
mV.
If
the
4-11