Keithley 6485 User Manual

16-8 Calibration Model 6485 Instruction Manual
9. Press ENTER. The unit will prompt for the negative full-scale calibration point:
-20µA CAL
10. Press ENTER. The Model 6485 will prompt for the negative full-scale calibration
current:
-20.00000 µA
11. Set the calibrator output to –20.00000µA, then adjust the display to agree with the
calibrator value. Press ENTER to complete calibration of the present range.
12. Press EXIT to return to normal display.
13. Repeat steps 1 through 12 for the 200µA through 20mA ranges using Table 16-4 as
a guide.
Table 16-4
20 µ A to 20mA range calibration summary
Model 6485 Range Calibrator Currents*
20µA0µA
+20.00000µA
-20.00000µA
200µA0µA
+200.0000µA
-200.0000µA
2mA 0mA
+2.000000mA
-2.000000mA
20mA 0mA
+20.00000mA
-20.00000mA
* Calibrate zero, positive full-scale, and negative full-scale for each
range. BNC shielding cap used for zero calibration point for all
ranges. See procedure.

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)