Fluke 5502A, Руководство оператора

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Front-Panel Operation
Set Output Limits
4
4-53
With the nominal or true-value method, small changes in output value give you a
calculated error that is the same. In the example above, the Control display will show the
error as -30.0 ppm.
The true-value method is useful for large changes in output value. For example, if you
apply 10.0000 V to an analog meter, and then adjust the Calibrator output to 11.0000 V
so that the analog meter reads exactly 10 V, the true-value method will show
nominal= +10.0000 V
rel err= -9.0909 %
The -9.0909 % is the relative error of the analog meter when compared to the true value
(11.0000 V in this case).
To select the UUT error calculation method:
1.
Push

.
2. Push the softkey INSTMT SETUP.
3. Push the softkey OTHER SETUP.
4. Push the softkey ERROR SETUP
5. Push the softkey ERR REF to toggle between “nominal” and “tru val”.
Use Multiply and Divide
The Calibrator output value (or reference value if you have edited the output) can be
multiplied by a factor of 10 by the

key. Similarly, the output value (or reference
value if you have edited the output) can be divided a factor of 10 by the

key. The
output is put in STBY (Standby) if the multiplied value is more than 33 V. Push

to
continue if necessary. This feature is useful for UUTs with ranges organized in decades.
Set Output Limits
An output-limit feature is available to help prevent accidental damage to a UUT from
overcurrent or overvoltage conditions. This feature lets you preset the maximum positive
and negative voltage or current output. These entry limits prevent higher outputs entries
from the front-panel keys or the output-adjustment controls. Positive limits for voltage
and current set the limits for ac voltage and current. Your limit selections are kept in the
nonvolatile memory. Voltage limits are shown as rms values, and voltage offsets are
ignored.
To set voltage and current entry limits:
1.
Push

to clear output from the Calibrator.
2. Push

.
3. Push the softkey INSTMT SETUP to open the setup submenus.