Arbiter Systems 1040C User Manual

3-4
Phase Angle
Calibration of phase angle meters or
transducers for single phase operation requires
use of both the voltage and current outputs of
the 1040C. The representative circuit
connection diagrams for these types of
devices are the same as for the ac power
meters and transducers, given in figure 5.
Typical connections for calibration are also
the same as for ac power meters and
transducers, and are given in figure 6. For
calibration, the 1040C voltage output leads
are connected to the voltage terminals of the
meter or transducer, and the 1040C current
output leads are connected to the current input
terminals of the meter or transducer (figure 6a
and 6c). If the meter or transducer uses an
external current transformer, one of the
current output leads of the 1040C should be
passed through the center of the current
transformer, and then shorted to the other
lead. If the meter or transducer uses an
external potential transformer, then likewise it
must be inserted between the 1040C voltage
output leads and the input voltage leads of the
unit under test. Refer to figures 6b and 6d for
these two types of connections. The 1040C
should first be configured to operate in the ac
power mode, as described in paragraph 2.5.6,
and the appropriate voltage and current values
should be selected. After the outputs have
been enabled and the phase angle meter or
transducer under test has been observed to be
indicating zero, press the "Phase" button.
This will allow shifting of the relative phase
between the voltage and the current outputs.
The desired phase angle can now be entered
directly, via the keypad, and followed by the
appropriate units (degrees). A negative value
for phase angle corresponds to the output
current lagging the output voltage. After
entering the value for phase angle, the
operator may adjust the value by using the
control knob, or by using the "Up" or "Down"
keys. For more complete instructions on
operation of the 1040C for phase angle
calibrations, refer to section 2.5.1 of the
operation manual.
Power Factor
The Power Factor in a circuit is equal to
the cosine of the phase angle between the
voltage and the current. With this in mind,
any power factor can be simulated by
adjusting the phase relationship between the
voltage and current, which can be
accomplished quite easily with the 1040C.
Two methods can be used:
• The required phase angle can be
entered directly via the keypad, as
described in the section on phase
angle calibration;
• The power factor can be entered
directly, by first pressing the "Power
Factor" key, then using the adjust
knob to vary the displayed power
factor. This method allows entry of
lead or lag power factor values
without having to first calculate the
corresponding phase angle.
For an illustration of the relationship
between phase angle and power factor in the
1040C, refer to figure 12.
In order to accomplish power factor
indication, some transducer manufacturers
recommend using one of their phase angle
transducers and performing a mathematical
conversion on the output signal. This can be
done manually, using conversion tables
supplied by the manufacturer, or
automatically, using a meter having cosine
scaling. Typical transducer application circuit
connections and calibration setup connections
are usually the same as those for a phase
angle, watt, or var transducer, as shown in

Arbiter Systems 1040C Specifications

General

Brand	Arbiter Systems
Model	1040C
Category	Test Equipment
Language	English