Fluke 540B - Current Shunt Accessories

6-14. SPECIFICATIONS
CURRENT RATINGS
10, 20, 30, 50, 100, 200, 300,
and 500 milliamperes;
1, 2, 3, 5, 10, and 20 amperes.
NOTE. Each shunt may be used from 1/2 to 1 times
nominal rating.
OVERALL CURRENT RANGE
2. 5 milliamperes to 20 amperes. (5 ma nominal rating
of the Model A54 thermal converter heater allows cur -
rent transfers from 2. 5 ma to 5 ma without shunts.)
ACCURACY (% of input)
The following also applies to the Model 540B thermal
converter heater, for current transfers from 2. 5 to
5 ma.
SHUNT
10
ma through 20a
10
ma through 5a
CALIBRATION
FREQUENCY
5Hz-20kHz
20 kHz - 50 kHz
50 kHz - 100 kHz
ACIDC
DIFFERENCE
:!:0.02%
:1:0.03%
:!:0.05%
Each range is adjusted to be within the above deviations
from zero error as defined by reference standards
maintained by the John Fluke Standards Laboratory
and periodically calibrated by the National Bureau of
Standards. These ac/dc difference figures do not in -
output
MODEL A45 SCHEMATIC DIAGRAM
540B
elude the National Bureau of Standards random and
systematic error uncertainties. John Fluke Standards
Laboratory or National Bureau of standards test reports
are available at extra cost.
6-15. ACCESSORIES
6- 16.
Optional accessories include the following:
a. A Model C41 case (see Figure 6- 3), manufactured
of ABS plastic with polyurethane foam cushion, for
transporting and storing a complete set of shunts.
b. A Model A45 Current Transfer Switch (see Figure
6-3). This switch is designed for convenience in
current measurement to eliminate the process of
interchanging AC and DC leads to the current shunt.
Two
cable assemblies are supplied with the Model
A45
Current Transfer Switch (see Figure 6-3) .
One cable, Fluke part number 6002-212860, is used
for connecting a Model A40A shunt to the Model A54
SHUNT
terminals, or can be used to connect the
Model A45 Current Transfer Switch to a Model A40
shunt. The
other cable, Fluke part number 6002-
212852,
is used to connect a Model A40A shunt to
the Model A45 Current Transfer Switch. See Figure
2- 8 for an illustration showing the interconnection
of
the above cables in conjunction with the Model
A45 Current Transfer Switch, the Model A54, and
the current shunts.
6002- 212860
6002- 212852
Figure 6·3. CURRENT SHUNT ACCESSORIES
6-3