Front Panel Operation
Editing and Error Output Settings
4
4-49
4. Set the UUT to measure the output on the desired range.
5. Set the calibrator source preference to 5725: press the front panel S key; softkey
INSTMT SETUP; softkey OUTPUT SETUP; softkey SOURCE PREFRNCE to
select 5725.
6. Press the P key one or more times to return to a previous menu. When asked,
press softkey STORE CHANGES or DISCARD CHANGES, as desired.
7. Enter the desired output value as described under “Setting the Output.”
Note
You can have the 5725A source a dc current below 1.5 A to take advantage
of the amplifier’s higher compliance voltage. To do so, press the RANGE
softkey to lock onto the 11 A range when the 5500A is set for over 2.2 A, or
set the lower current and press B O to turn on the amplifier.
8. Activate and deactivate the 5725A Amplifier by pressing the B key. (See
“Selecting an External Amplifier” earlier in this chapter.) When boost is selected,
the boost key annunciator is on. If BOOST is not your default source preference,
when you press the R key, the boost will be deactivated.
4-46. Editing and Error Output Settings
All 5500A Calibrator outputs can be edited using the front panel Edit Field knob and
associated L, W, and e keys. In addition, multiply X and divide D keys
edit the output by decades. The difference between the original output (reference) and
edited output is displayed as an “error” between the two settings. This allows you to edit
a value to achieve a correct reading at the UUT and thereby calculate an error in ±% or
ppm (parts per million) if it is less than ±1000 ppm. Table 4-3 lists the actions that cause
the calibrator to exit the error mode and return to the original reference output, or to
output a new reference, as selected.
Table 4-3. Keys That Exit Error Mode
Keys Action
E Returns to the previous reference value.
I+E Establishes a new reference.
A new keypad entry +
E
Establishes a new reference.
N Establishes the present output as a new reference.
X Sets the calibrator to ten times the reference value and
establishes a new reference.
D Sets the calibrator to one-tenth the reference value and
establishes a new reference.
R Returns to the power-up state.
4-47. Editing the Output Setting
When you initially source an output from the Calibrator, you enter a specific value. For
example, 10.00000 volts dc. To edit the output value to suit your application, turn the
front panel Edit Field knob clockwise to increase the value or counter-clockwise to
decrease the value. (The Edit Field controls will not operate if you are in any setup
function. Press the P key one or more times to exit a setup function.)
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