XITRON 2000I, User Manual

Page: 33 / 96

Operating the 2000 Instrument 33
•
The multiplier is automatically selected to provide the required resolution
in the display. The previously described ability to control the multiplier
used in the display format is inactive.
•
The thermocouple type data is no longer provided in the display.
•
The amount by which the output has been deviated from the initial value
is shown in the display.
The level present when the “Adjust” mode was initiated is referred to as the
nominal output in this document. Examples of display formats during
“Adjust” mode are shown below, with the increment digit underlined for
clarity.
•
If the initial output level is
–1.0 V
and no adjustment had taken place,
then the display shows:
1.0 0.0µV
•
If the initial output level is:
+10.0mV,
and the output is adjusted to:
10.028mV,
then the display shows:
+10.02800m – 28µV.
The displayed deviation shows the amount the item being calibrated is in
error. Specifically it shows the opposite polarity to the amount the output
level was deviated, thus the
nominal value is the addition of the actual output
level and the displayed deviation. The deviation always displays using the
lowest possible multiplier, therefore:
•
A voltage deviation of up to
999uV
is displayed using the
µ
multiplier.
•
A voltage deviation of up to
999mV
is displayed using the
m
multiplier, and
•
A voltage greater than
999mV
is displayed without a multiplier.
Current output levels and deviations are displayed similarly to the voltage
output levels and deviations shown above, with the exception that the
deviation multiplier may be
p, n, µ
or
m
as required. Note that only
µ
and
m
are Units/Enter keys.
An example of a simulated temperature deviation is shown below. Note that
the format is slightly different from a voltage or current output in that
multipliers are not used for either the deviation or the simulated temperature.
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