Keithley 6487 Reference Manual

Model 6487 Reference Manual Relative, mX+b, m/X+b, and log 5-3
Displaying or manually keying in REL
Pressing CONFIG and then REL displays the present Rel value. This displayed Rel value
can be enabled (pressing ENTER) or a different Rel value can be entered and enabled.
1. Press CONFIG and then REL. The present Rel value will be displayed.
2. To change the Rel value, use the RANGE and cursor keys and change the value. To
change Rel polarity, place the cursor on the polarity sign and press either manual
RANGE key. To change the Rel range, place the cursor on the range symbol (at the
end of the reading) and use the manual RANGE keys (Table 5-1).
3. With the desired Rel value displayed, press ENTER to enable Rel.
Table 5-1
Range symbols for rel values
Symbol Prefix Exponent
ppico- 10
-12
nnano-10
-9
µmicro-10
-6
m milli- 10
-3
ˆ (none) 10
0
K kilo- 10
3
Mmega-10
6
Ggiga-10
9
T tera- 10
12

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%