User Manual

The menu system
Operators that
can be typed:
SIN(), COS(), TAN(). These operators take an angle in degrees which is
between the br
ackets and return its sine, cosine or tangent.
ASIN(), ACOS(). These operators take a number between -1 and 1 which is
between the
brackets and return an angle in degrees.
ATAN(). Thisoperatortakesanumberthatisbetweenthebracketsand
returns an a
ngle in degrees.
LN(), LOG(). This operator returns the logarithm of the number between the
brackets.
LN is log to the base e, LOG is log to the base 10.
Constants that can be typed:
PI. Where π≈3.14159
NOTE. When the shift key turns on, operators such as COS(), SIN(), and TAN()
will be
entered as whole words. Operators such as ACOS(), ASIN(), ATAN(), LN(),
and LOG() must be typed as individual letters when the shift key is turned on.
The fo
rmula is checked for validity when OK is selected. If there is an error, then
an error message is displayed. If there are no errors the calculated value will
be shown at the bottom of the screen.
If the math result is invalid (for e xample, infinity because of a divide by zero) the
display will show four dashes.
System Configuration
Blanking
Use Blanking to zero the results below a given value. The Blanking levels are set
to 5% of the currently selected range.
When Blanking is enabled (default), all values below the threshold will show a
zero value. Disable Blanking to measure small voltages or currents.
If blanking operates on e ither voltage or current then all related measurements
would be blanked including W, VA and PF.
Averaging
An averaging depth of between 1 a nd 10 can be specified. The default value
is 10. With the update rate set to 0.5 seconds, this corresponds to values being
averaged over five seconds.
If the range is changed, the averaging is reset.
PA3000 Power Analyzer User Manual 59