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5700A/5720A Series II

Operators Manual

7-14

7-10. Range Calibration

Once calibration is complete, you may find you need to make further adjustments to the

range. Calibrating the range is accomplished by adjusting a range constant, which is an

additional gain multiplier. Although range calibration is not needed in order to meet total

uncertainty specifications, they are useful for tuning the calibrator so that its values are

closer to your own standards.

Use your own laboratory standard to adjust the range constants. The following procedure

for adjusting the range constants is designed for laboratory standard values that are:

between 45% and 95% of the range’s full-scale value.

Once you adjust the range constant, the new constant remains active until the next

calibration, at which time all range constant multipliers are rest to 1. You can also erase

all range adjustments by calling up the format EEPROM menu and selecting Range

Constants (see Chapter 4).

Before you begin the following procedure, make sure you have the equipment you need

on hand including your own laboratory standards where required.

The following example procedure adjusts the 220V dc range constant using the following

equipment:

• 732B DC reference standard

• 752A Reference Divider

• 845AB/845AR Null Detector

• Low Thermal Test Leads: 5440A-7002 (banana plugs) or 5440A-7003 (spade lugs)

Proceed as follows to adjust the 220V dc range constant. You must have completed

calibration to external standards before you follow this procedure.

1. Press the “Setup Menus” softkey; the press the “Cal” softkey. The following menu

appears:

2. Press the “Cal” softkey to bring up the next menu shown below:

Fluke 5700A Series II User Manual

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