Fluke II Series Service Manual

Maintenance
PERFORMANCE
TESTS
1.
Set the UUT
function
switch
to
VDC,
and
connect the
DC
Voltage
Calibrator
output
to the vn-*+- and
COM input terminals of the
UUT.
2. Referring
to Table
3-2, set the DC Voltage
Calibrator for
the
output indicated in
steps
1 through
4 only. Verify that
the UUT display
reading
is within
the
limits
shown.
Table
3-2.
DC Voltage
Test
STEP
DC INPUT
DISPLAY
READING
VOLTAGE
70 73/75/21
77/23
1
2.685
to
2.715
2.688 to
2.712
2.691 to
2.709 V DC
2
26.85 to 27.15
26.88 to 27.12
26.91 to
27.09 V DC
3
+270V 268.5
to 271.5
268.8 to 271.2
269.1 to 270.9
V DC
4
+1000V 993
to 1007
995 to 1005
995 to 1005 V
DC
*5
+300
mV
298.4
to 301.6 298.7
to 301.3
299.0 to 301.0
V DC
*300
mV function
only
3.
Set the DC
Voltage Calibrator for
an output of +300 mV,
and switch
the UUT
to
the
300
mV function.
Verify that the
UUT display reading is
within the limits
shown
in
Table 3-2
(step
5).
AC Voltage
Test
3-9.
WARNING
CONNECT
THE
GROUND/COMMON/LOW SIDE
OF THE
AC CAL-
IBRATOR TO COM
ON THE UUT.
1. Set the UUT function
switch
to
VAC, and connect the
AC Voltage
Calibrator to the
vn-++ and
COM input terminals.
2.
Set
the AC Voltage Calibrator for
the output given in Table
3-3, and verify that the
UUT display reading is within the limits
shown.
NOTE
When
the input
is
open
in the
VAC
function,
it is normal
for
the 70 Series
II
meters to
read
some
counts on the
display. This is due to
ac pickup in
the
ac amplifier
when the
ac
amplifier is
unterminated.
Table
3-3.
AC
Voltage Test
INPUT
DISPLAY
READING
70,
73,
75/21 and 77/23
STEP VOLTAGE
FREQ.
1
2.7V
100 Hz
2.644 to 2.756
V
AC
2
2.7V 500 Hz
2.644 to 2.756
V AC
3
750V 100 Hz
733
to
767 V
AC
4
750
V
1000 Hz
733
to 767
V
AC
3-7

Fluke II Series Specifications

General

True RMS	Yes
Temperature	-40 °C to 400 °C
Continuity	Yes
Diode Test	Yes
Safety Rating	CAT III 600V
Voltage DC	600V
Voltage AC	600V
Current DC	10A
Current AC	10A
Resistance	40MΩ
Battery Life	400 hours
Warranty	3 years