Voltage Method – Verifying the Load Resistances while under Power
Nominal
Externally
Resistance
Applied Test
Value
Voltage at
mains
Frequency
10 kΩ
200 V ac
25 kΩ
315 V ac
50 kΩ
300 V ac
100 kΩ
600 V ac
250 kΩ
1000 V ac
500 kΩ
1000 V ac
1 MΩ
1000 V ac
5 MΩ
1000 V ac
10 MΩ
1000 V ac
INPUT
SENSE
8846A
6-1/2 DIGIT PRECISION MULTIMETER
V
4 W
2W/4W
HI
HI
0.20100
1000 V CAT I
300V
600V CAT II
LO
LO
1V
FUSED
400
BACK
F1
F2
F3
10A
mA
DC V
ACV
DC I
AC I
REAR
FRONT
RANGE
FREQ
TEMP
PERIOD
5320A-LOAD
100 mA
40 mA
10 k
35 k
1200V MAX
2000V MAX
2000V MAX
140W MAX
110 W MAX
5520A CALIBRATOR
NORMAL
AUX
SCOPE
V, , ,RTD
A, -SENSE, AUX V
OUT
STBY
OPR
HI
LO
7
8
TRIG
4
5
GUARD
20A
1
2
/ +
0
20V PK MAX
TC
20V PK MAX
Figure 6. Test Equipment Connections for Voltage Test Method
Table 3. 5322-LOAD Resistance Verification Values
Nominally
Required Test
Current
20 mA
9 mA
6 mA
6 mA
4 mA
2 mA
1 mA
0.2 mA
0.1 mA
mA~
F4
F5
MEMORY
INSTR
TRIG
SETUP
MEAS
ZERO
ANALYZE
SETUP
10 mA
50 k
100 k
250 k
500 k
5500V MAX
5500V MAX
5500V MAX
80 W MAX
300W MAX
120 W MAX
60 W MAX
COM
20 V MAX
PREV
EARTH
EXGRD
SCOPE
MENU
µ
dBm
sec
9
m
V
Hz
SETUP
RESET
n
W
¡F
NEW
6
CE
k
A
¡C
REF
p
MEAS
MORE
3
M
F
TC
MODES
MULT
DIV
•
SHIFT
ENTER
÷
x
Measured
Current
High Voltage Load Adapter
Performance and Verification Test
4 mA
1mA
1M
5 M
5500V MAX
5500V MAX
30 W MAX
6 W MAX
POWER
EDIT
FIELD
POWER
I
O
Calculated
Resistance
RL=Vs/Im
(±10 % of nominal)
(±10 % of nominal)
Ieu002.eps
Alternative DMM
Verification
Method
Measured
Resistance
7
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