Model 6487 Reference Manual
Measurements and Sourcing Voltage
3-11
Programming example
The following command sequence will perform one zero corrected amps measurement:
*RST
' Return 6487 to RST defaults.
FUNC ‘CURR’
' Select current function.
SYST:ZCH ON
' Enable zero check.
CURR:RANG 2e-9
' Select the 2nA range.
INIT
' Trigger reading to be used as zero
' correction.
SYST:ZCOR:STAT OFF
' Turn zero correct off.
SYST:ZCOR:ACQ
' Use last reading taken as zero
' correct value.
SYST:ZCOR ON
' Perform zero correction.
CURR:RANG:AUTO ON
' Enable auto range.
SYST:ZCH OFF
' Disable zero check.
READ?
' Trigger and return one reading.
Ohms measurements
Overview
To measure ohms with the Model 6487, you must set up the voltage source to the desired
range, value, and current limit (see
“Voltage source operation,” page 3-15
), choose an
appropriate current measurement range (or use auto range), and enable the ohms function.
With the ohms function enabled, the Model 6487 calculates the measured resistance from
the voltage source value and the measured current: R = V/I. When setting up the voltage
source, choose as high a voltage value as possible for maximum current, keeping in mind
such factors as the power dissipation and voltage coefficient of the resistance being tested.
klqb
Ohms measurements can be made using either the DC or alternating voltage
modes. See
“Alternating voltage ohms mode,” page 3-21
for information on the
alternating voltage mode.
