Keithley 6482 - Front Panel Math Functions

6482-901-01 Rev. A / August 2012 Return to Section Topics 5-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 5: Relative, Math, Ratio, and Delta
MX + B
This math function multiplies the measured current by an offset factor and adds an offset value as
follows:
Reading = MX + B
Where: M = Gain (slope) factor
X = Channel 1 or channel 2 measured current
B = Offset value
Electrical power
This math function calculates power using the bias voltage and measured current values as
follows:
Reading = V
× I
Where: V = Channel 1 or channel 2 voltage
I = Channel 1 or channel 2 current
Front panel math functions
Using Table 5-3 as a guide, configure measurement math functions as follows:
1. Press the CONFIG key and then the MSR1 or MSR2 key to select channel 1 or channel 2,
respectively.
2. Using the EDIT
 and  keys, place the cursor on the function, and then press the ENTER
key.
3. From normal display, press the MSR1 or MSR2 key to display the function reading.
4. To cancel the function and return to the normal current measurement display, repeat steps 1
and 2, but select I in the configuration menu.
Table 5-3
Measurement function configuration menu
Configuration menu item Description
CONFIG > MSR1
CONFIG MSR1 BUTTON
I
I/V
V/I
MX + B_UNIT
P
CONFIG > MSR2
CONFIG MSR2 BUTTON
I
I/V
V/I
MX + B_UNIT
P
Configure channel 1 measurement.
Current measurement.
Conductance (I/V) measurement (channel 1I / channel 1V).
Resistance (V/I) measurement (channel 1V / channel 1I).
MX + B measurement.
Electrical power (V × I) measurement
(channel 1V × channel 1I).
Configure channel 2 measurement.
Current measurement.
Conductance (I/V) measurement (channel 2I / channel 2V).
Resistance (V/I) measurement (channel 2V / channel 2I).
MX + B measurement.
Electrical power (V × I) measurement
(channel 2V × channel 2I).