HP E1312A User Manual

HP E1312A/E1412A User's Manual and SCPI Programming Guide
Warranty ....................................................................................................................... 9
Safety Symbols ........................................................................................................... 10
WARNINGS ............................................................................................................... 10
HP E1312A Declaration of Conformity ..................................................................... 11
HP E1412A Declaration of Conformity ..................................................................... 12
Reader Comment Sheet .............................................................................................. 13
Chapter 1
HP E1312A and HP E1412A Multimeter Module Setup ......................................... 15
Using This Chapter ..................................................................................................... 15
General Information ............................................................................................ 15
Setting the Module Address Switch............................................................................ 16
Interrupt Priority ......................................................................................................... 17
Setting the Line Frequency Reference........................................................................ 17
Checking the Line Frequency Reference ............................................................ 17
Multimeter Functional Connections .................................................................... 19
Initial Operation .......................................................................................................... 22
Chapter 2
HP E1312A/E1412A Multimeter Application Information ..................................... 25
Using This Chapter .................................................................................................... 25
Measurement Tutorial................................................................................................. 25
DC Voltage Measurements ......................................................................................... 25
Thermal EMF Errors ........................................................................................... 25
Loading Errors (dc volts) .................................................................................... 26
Leakage Current Errors ....................................................................................... 26
Rejecting Power Line Noise Voltages ................................................................ 27
Common Mode Rejection (CMR) ....................................................................... 27
Noise Caused by Magnetic Loops ....................................................................... 28
Noise Caused by Ground Loops .......................................................................... 28
Resistance Measurements ........................................................................................... 29
4-Wire Ohms Measurements ............................................................................... 29
Removing Field Wiring Resistance Errors in 2-Wire Ohms Measurements ...... 30
Power Dissipation Effects ................................................................................... 31
Settling Time Effects ........................................................................................... 31
Errors in High Resistance Measurements ........................................................... 31
Making High-Speed DC and Resistance Measurements ..................................... 31
DC Current Measurement Errors ................................................................................ 32
True RMS AC Measurements..................................................................................... 32
Crest Factor Errors (non-sinusoidal inputs) ........................................................ 33
Loading Errors (ac volts) ..................................................................................... 34
AC Measurements Below Full Scale .................................................................. 34
Function and Range Change Internal Offset Correction ..................................... 34
Low-Level Measurement Errors ......................................................................... 35
AC Turnover Errors ............................................................................................ 35
AC Current Measurement Errors ................................................................................ 36
Making High-Speed AC Voltage or Current Measurements...................................... 36
Contents
Edition 4
Contents 1