U
SING
V
OLTAGE AND
C
URRENT
T
RANSDUCERS
Page 24
© Voltech 2010
Power Analyzer User Manual
Type the new scale factor (e.g.10)
Press
OK
Press „MENU‟ to return to the measurement display.
The is now ready to make measurements using an external shunt.
3.4.
T
O CONNECT A TRANSDUCER WITH A VOLTAGE OUTPUT
These transducers contain active circuits that help to improve performance at high
bandwidth. They may be of the „hall effect‟ or Rogowski coil type.
The procedure is similar to that of installing an external shunt as described above.
1.
Follow the manufacturer‟s instructions for the safe use and installation of the
transducer.
2. Connect the voltage output to the EXT-
HI
and EXT-
LO
terminals of the
channel as above.
3.
Select „Inputs‟ – „Shunts‟ – „External‟ as above.
Press ‟MENU‟
Select
„Inputs‟ and press
Select
„Shunts‟ and press
Select
„External‟ and press
Press „MENU‟ to return to the measurement display.
4. Select and input a scale factor. These types of transducers are often rated in
terms of mV / amp. For example a transducer with an output of 100mV / amp is
the equivalent of a 100 milli-ohm external shunt resistor.
Scale = 1 / (100 x R) (where R is the resistance value of the shunt).
In this example where R = 0.1 Ohms
Scale = 1 / (100 x 0.1)
Scale = 1 / 10 = 0.1
Press ‟MENU‟
Select
„Inputs‟ and press
Select
„Scaling‟ and press
Select
„Amps‟ and press
Use the
delete key to clear the entry.
