8
Exercise: Activating Error Mode
Chances are the meter reads something other than
exactly 10V. To quickly check the error of the
meter, turn the rotary knob to obtain a meter
reading of exactly 10V, and read the error off the
Control Display.
Turning the knob is all it takes to activate error
mode. When you turn the knob, the least
significant digit is highlighted. This digit changes
as you turn the knob. To change a higher order
digit, thereby speeding up the adjustment rate,
press <.
The error on the Control Display is a combination
of offset, scale, and linearity errors. You can view
component parts of the error by pressing o and
S.
Checking the Meter’s Higher and Lower Ranges
To check the meter error at 100V dc, first set the
meter range (if applicable) to the lowest range that
reads 100V. Press Y O. This sets a new
reference equal to ten times the previous
reference of 10V dc. (Pressing O was necessary
because the Calibrator goes into standby when it
crosses the safety threshold from below 22V to
over 22V.) Turn the rotary knob to re-activate error
mode and determine the meter error at 100V.
Now press Z Z. Set the meter range switch (if
applicable) to the lowest range that reads 1V.
To end the error mode session, press E.
This recalls the reference value and exits error
mode.
Press r
to set the output to 0 mV dc in standby.
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