Keithley 6487 Reference Manual

Model 6487 Reference Manual Buffer and Sweeps 6-3
Figure 6-1
Buffer locations
Buffer timestamps
Use the TSTAMP: menu item to change the timestamp format. To access the menu:
1. Press MENU.
2. Scroll to the TSTAMP: menu item using RANGE and keys.
3. Press ENTER.
4. Using RANGE and keys, select desired setting. Available options are ABS
(absolute) or DELT (delta).
5. ABS: each timestamp is referenced to the first reading stored in the buffer. The first
reading always has a timestamp of 0000000.0000.
6. DELT: each timestamp provides the time between the readings.
RANGE
RANGE
RDG NO. 10
Reading Value Vsource
RDG NO. 9 Reading Value Vsource
RDG NO. 8 Reading Value Vsource
RDG NO. 7 Reading Value Vsource
RDG NO. 6 Reading Value Vsource
RDG NO. 5 Reading Value Vsource
RDG NO. 4 Reading Value Vsource
RDG NO. 3 Reading Value Vsource
RDG NO. 2 Reading Value Vsource
RDG NO. 1 Reading Value Vsource
STD DEV Standard Deviation Value ----------
AVERAGE Average Value ----------
PK-PK Peak to Peak Value ----------
MIN AT XX Minimum Value Vsource
MAX AT XX Maximum Value Vsource
g
STD DEV Standard Deviation Value
AVERAGE Average Value
PK-PK Peak to Peak Value
Buffer Statistics Buffer Timestamps
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
Timestamp
----------
----------
----------
Timestamp
Timestamp
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▲
▲
▲
▲
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Voltage Source

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%