Fluke 522A/6, Operator'S Manual

Page: 123 / 426

Front Panel Operation
How to Enter a DC Offset
4
4-47
nn112f.eps
7. Press
E
. The calibrator clears your entry from the “New pf
=
” line and copies it
to the “Power Factor
=
” line of the Control Display.
8. Press
P
one or more times to return to previous menus.
How to Enter a DC Offset
When the calibrator single output is an ac voltage of sine waves, triangle waves, square
waves or truncated sine waves, you can apply a
+
dc offset. When applying an offset to
square wave outputs, the duty cycle must be 50.00 % (default). The offset selection is
entered using the softkey OFFSET, which appears when the ac voltage output is less than
33 V (sine waves), 66 V p-p (square waves) or 93 V p-p (triangle waves and truncated
sine waves). The softkey OFFSET will not appear and offsets may not be entered when
the output is a voltage sine wave measured in dBm.
The maximum offset value allowed depends on the maximum offset and maximum peak
signal for each range. For example, a square wave output of 10 V p-p is within the range
6.6 to 65.9999 V p-p, a range that allows a maximum peak signal of 55 V. For this
example, the square wave peak value is 5 V, thus allowing a maximum
±
offset of 50 V
for a maximum peak signal of 55 V.
Check the specifications in Chapter 1 for offset limits. If you are using an offset voltage
and you cause the output to move into a range where offset is not allowed (for example,
above 33 V for a sine wave output), the calibrator will go into the standby mode and the
offset function will be disabled.
Complete the following procedure to enter a dc voltage offset. If you make an entry error,
press
G
to clear the display, then reenter the value. This procedure assumes you have
already sourced a single ac voltage output not exceeding 33 V (sine waves), 65 V p-p
(square waves) or 93 V p-p (triangle waves and truncated sine waves), thus displaying the
softkey OFFSET (below).
nn113f.eps
1. Press the softkey WAVE to select the desired waveform: sine waves (sine), triangle
waves (tri), square waves (square) or truncated sine wave (truncs).
2. Press the softkey OFFSET, opening the offset entry display. Enter the desired offset
using the numeric keys and decimal point key. For example, 0.123 V (below).