Fluke 52120A - Page 39

Front-Panel Operation
Notes on Product Use 2
2-7
VOLTAGE OUTPUT ON
CURRENT OUTPUT ON
1430V
Pk
MAX
30A Pk
15V Pk
MAX
46V Pk
MAX
VOLTAGE
CURRENT
OUTPUT
OUTPUT
SENSE
1V Pk
MAX
1V Pk
MAX
46V Pk
MAX
HI
LO
HI
LO
HI
LO
ENERGY COUNTER
INPUTS
1
23
4
0 - 28 V MAX
HIGH CURRENT
OUTPUT
LOW CURRENT
OUTPUT
850V PK
MAX
850V PK
MAX
30A PK
7V PK
MAX
180A PK
7V PK
MAX
OPTION
POWER
OUTPUT
(12V DC)
HI
LO
HI
LO
Line Side
Control Cable
Load Side
Shunt
Resistor
Vin
L
L
N
N
Fluke 52120A
Fluke 6105A
gpp012.eps
Figure 2-2. Product Connections to a Watthour Meter
The capacitance between the measurement circuits and the grounded meter case is too
small to pass a common-mode signal of sufficient amplitude to change the measurement.
Devices with their own power supplies which have an isolation input transducer (such as
current transformers) are relatively immune to common mode current errors. The path to
ground is interrupted by the transducer.