Fluke 8840A - Resistance Test

Maintenance
PERFORMANCE TEST
Table 6-2. DC Voltage Test
STEP
A'
B
C'
D
MAXIMUM
+00.005
RANGE
200 mV
2V, 20V,
200v,
1 OOOV
200 mv
2V
+5
counts
2. When in fast reading rate with internal trigger and transmitting data out of the IEEE-488 interface, the 8840A display
must
be blanked (command Dl) to ensure stated accuracy.
MINIMUM
-00.02
E
F
G
6. Set the AC calibrator to standby and disconnect it
from the
8840A.
6-6. Resistance Test
The following procedure may be used to verify the
accuracy of the 2-wire and 4-wire ohms functions.
1.
Ensure the 8840A is on and has warmed up for at
least
1 hour.
2. Connect the Resistance Calibrator to the 8840A for
INPUT
(V dc)
OV (short)
OV (short)
100 mV
1V
MAXIMUM
~00.02
-2
counts
For each step in Table
6-5, select the indicated range,
set the Resistance Calibrator for
the specified nominal
input, and proceed
as follows:
a.
Test the 4-wire ohms function:
1. Select the 4-wire ohms function.
2. Verify that the displayed reading is within
the limits shown for each reading rate.
b. Test the 2-wire ohms function:
1. Select the 2-wire ohms function. (The
+2 counts
NOTES:
1. Relative to high-quality short stored using OFFSET feature.
20~
200V
lOOOV
4-wire ohms.
-
DISPLAYED READING
SENSE test leads need not be disconnected.)
Table 6-3. Low- and Mid-Frequency AC Voltage Test
I FASF
MEDIUM
MlNlMUM
-00.085
-5
counts
+99.987
+.99991
SLOW
10V +9.9992
STEP
NUMBER
MINIMUM
-00.003
-3
counts
+99.989
+.99993
+ 1.00008
+ 100.008
+ 1000.08
1oov
loOOV
INPUT
MAXIMUM
+00.003
+3
counts
+100.011
+ 1.00007
+9.9990
+99.990
i999.90
+99.992
+999.92
ERROR
IN
COUNTS
TEST LIMITS (IN VOLTS)
-
FREQUENCY
RANGE
MINIMUM
VOLTAGE MAXIMUM
0.01 OOOV
0.10000v
0.30000V
1
.ooooov
1.90000V
0.1
oooov
1.90000V
0.10ooov
1.90000V
0.001 OOOV
0.190000V
100
Hz
100 Hz
100 Hz
100 Hz
100 Hz
20 Hz
20 Hz
45 Hz
45 Hz
100 Hz
20 kHz
*~uick test points.
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