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525B
Users Manual
Testing DC Current
Use the 8508A and the precision shunt to measure the 525B output as shown in
Figure 6-2. Take the Voltage reading from the 8508A and divide it by the 742A-1
actual value to determine the current output. Verify the measurements listed in
Table 6-4.
525B
VOLTS
mA
RTD
100mA MAX
HI
HI
OUTPUT
100V MAX
LO
LO
20V PK
MAX
4W RTD
HI
INPUT
SENSE
LO
20V PK
MAX
mA
Output
Terminals
100 mA
output (A)
0.000
25.000
75.000
100.000
6-6
VOLTS
TC
TYPE
STBY
OPR
mA
RTD
UNITS
TC
INPUT/OUTPUT
OUTPUT
INPUT
ZERO
7
8
9
SHIFT
SETUP
CJC
C / F
4
5
6
SET
RECALL
AUTOSET
20V PK
MAX
1
2
3
RNG LOCK
LOCAL
EXP
/
0
•
ENTER
Figure 6-2. Measuring DC Current
Table 6-4. Measuring DC Current
Current
Volt
(I=E/R)
Current Shunt
CE
742A-1
Shunt Value
Direct into 8508A
Current Input,
Autorange
8508A DCV Function
90 Day (μA)
1 Year (A)
Spec
Spec
2.0
2.0
4.1
4.5
8.3
9.5
10.5
12.0
fcn25f.eps
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