17-4 Calibration Model 6220/6221 Reference Manual
Return to Section 17 topics
Recommended calibration equipment
Table 17-1 summarizes recommended calibration equipment specifications and
typical models. Ideally, equipment uncertainty should be at least four times better
than equivalent Model 6220/6221 specifications. However, the equipment listed
for the 2nA and 20nA ranges does not quite meet that requirement. For optimum
calibration to factory specifications, it is recommended that the Model 622x be
returned to the factory for calibration.
Calibration equipment connections
For the sake of clarity, only actual signal lines are shown in equipment connection
drawings in this section. To ensure calibration integrity, be sure to use appropriate
triax cables or (where appropriate) coax cables for all signal connections.
Restoring factory defaults
Before performing the calibration procedures, restore the instrument to its factory
defaults as follows:
1. Press SETUP.
2. Select PRESET, then restore the factory default conditions by pressing
ENTER.
Table 17-1
Recommended calibration equipment
Description Key specifications
Manufacturer/model
Digital Multimeter Measure 200nA to 100mA DC, ±100ppm
Measure ±25mV, ±0.1V, ±20V, ±21V and
±100V DC, ±100ppm
Agilent 3458A
Picoammeter Measure 2nA and 20nA DC, ±2000ppm Keithley 6487
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
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