Set HP3458A to 100 PLC. Do an autocal on HP3458A.
Allow enough time for voltmeter to settle on a measured signal. DVM typically displays results in millivolts.
|1.||Measure excitation at taper pin block on +/- SENSE connection.|
|2.||Measure "No Load Zero" on +/- signal at taper pin block with no shunt applied.|
|3.||Apply shunt resistor across -Exc and -Sig at taper pin block.|
|4.||Measure "Shunt Applied" on +/- signal at taper pin block.|
|5.||Subtract "No Load Zero" value from "Shunt Applied" value.
This is the shunt calibration value in mV (multiply by 1000 to express in uV).
|6.||Divide shunt calibration value by measured excitation, multiply result by 1000.
This is the normalized shunt calibration value in uV per volt.
Reason for expressing shunt calibration value normalized in uV per volt is data reduction matrix is usually formatted
in uV per volt.
Record balance model, serial number, ECN, and applicable test. Shunt resistors should always be stored with balance.
(shunt-no load)/exc, uV/Volt
Values on last column are the zero corrected calibration shunt values to be used in Balance Constant Conversion Form, Line F. These numbers were normalized as typical of units from Ames Balance Calibration Lab.