15-8 Performance Verification Model 6487 Reference Manual
Figure 15-1
Connections for 20µA to 20mA range verification
2nA-2µA range accuracy
1. With the power off, connect the voltage calibrator and Model 5156 Electrometer
Calibration Standard to the Model 6487 INPUT jack (Figure 15-2). Initially, make
connections to the 1GΩ resistor in the calibration standard.
2. Turn on the Model 6487 and calibrator power. Allow them to warm up for one
hour.
3. Set the Model 6487 to the 2nA range.
4. With zero check enabled, zero correct the instrument and then disable zero check.
5. Set the calibrator voltage to 0.0000V and make sure the output is turned on.
6. Enable the Model 6487 REL mode. Leave REL enabled for the remainder of the
test.
Table 15-2
Reading limits for 20µA to 20mA ranges
Model 6487
Range
Calibrator
Current
Model 6487 Current Reading Limits
(1 Year, 18°C-28°C)
20μA 20.0000μA 19.9790 to 20.0210μA
200μA 200.000μA 199.790 to 200.210μA
2mA 2.00000mA 1.99790 to 2.00210mA
20mA 20.0000mA 19.9790 to 20.0210mA
120
LINE RATING
50, 60Hz
50 VA MAX
INPUT
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
IEEE-488
CAT I
TRIGGER LINK
RS-232
MADE IN
U.S .A .
ANALOG OUT
DIGITAL I/O
505V
MAX
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI
INTERLOCK
!
!
FUSE LINE
400mAT
(SB)
100 VAC
120 VAC
200mAT
(SB)
220 VAC
240 VAC
505V PK
505V PK
505V PK
Dual banana-to-BNC
adapter. Connect
Output LO to shield.
Triax-to-BNC
Adapter
INPUT
Model 6487 Picoammeter
DC Current Calibrator
Coax Cable
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