Keithley 6487/E Digital-Multimeter, DMM, 6487/E Data Sheet
Product codes
6487/E
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A Greater Measure of Confidence
www.keithley.com
1.888.KEITHLEY
(U.S. only)
•
10fa resolution
•
5½-digit resolution
•
<200µV burden voltage
•
alternating Voltage method
ohms measurements
•
automated voltage sweeps for
I-V characterization
•
floating measurements up to
500V
•
up to 1000 readings/second
•
built-in Model 486 and 487
emulation mode
•
IEEE-488 and rs-232 interfaces
•
analog output
•
Digital I/o
The 5½-digit Model 6487 Picoammeter/Voltage
Source improves on the measurement capability
of the award-winning Model 6485, and adds a
high resolution 500V source . It provides higher
accuracy and faster rise times than the 6485, as
well as a damping function for use with capaci-
tive devices . With eight current measurement
ranges and high speed autoranging, this cost-
effective instrument can measure currents from
20fA to 20mA, take measure ments at speeds up
to 1000 readings per second, and source voltage
from 200µV to 505V .
The Model 6487’s 10fA resolution, superior sen-
The Model 6487’s 10fA resolution, superior sen-
sitivity, voltage sweeping, and Alternating Voltage
resistance measurements make it well suited for
characterizing low current devices . Using the
latest current measurement technology, it is sig-
nificantly less expensive than other instruments
that perform similar functions, such as optical
power meters, tera-ohmmeters, competitive
picoammeters, or user-designed solutions . With
a price that’s comparable to a high-end DMM, the Model 6487 makes picoamp-level measurements
affordable for virtually any laboratory or production floor .
low Voltage burden and Higher accuracy
While DMMs typically employ shunt ammeter circuitry to measure current, the Model 6487 is a feed-
While DMMs typically employ shunt ammeter circuitry to measure current, the Model 6487 is a feed-
back picoammeter . This design reduces voltage burden by several orders of magnitude, resulting in a
voltage burden of less than 200µV on the lower measurement ranges . The low voltage burden makes
the Model 6487 function much more like an ideal ammeter than a DMM, so it can make current
measurements with high accuracy, even in circuits with very low source voltages .
successor to the Model 487
The Model 6487 builds on the strengths of
The Model 6487 builds on the strengths of
one of Keithley’s most popular picoammeters,
the Model 487, offering an additional 20mA
measurement range, as well as much higher
measurement speeds, up to 1000 readings per
second . It simplifies device characterization
with built-in voltage sweeping capability and the
Alternating Voltage method for high resistances .
A time-stamped 3000-reading data buffer pro-
vides minimum, maximum, and standard devia-
tion statistics . A built-in emulation mode makes
it possible to control the Model 6487 with any
custom code written to control the Model 487 .
features that Expand Test and Measurement flexibility
• Direct resistance measurements. Optimized for resistances from 50
• Direct resistance measurements. Optimized for resistances from 50
W to 5×10
14
W using the
Source Voltage/Measure Current method .
• Alternating Voltage method resistance measurements. This method improves resistance
measurements on devices with high background current or high noise . It extends the measurable
resistance range up to 10
16
W .
• 500V overload protection. This high overload protection and a robust design let the Model
6487 tolerate abusive overflows, including accidentally shorting the voltage source directly into
the ammeter .
Model 487
Model 6487
Current Ranges
2 nA–2 mA
2 nA–20 mA
Voltage Burden
200 µV
200 µV (1 mV on
20 mA range)
Reading Rate
Up to 180/s
Up to 1000/s
Voltage Sweeps
No
Yes
Alternating Voltage
Ohms
Ohms
No
Yes
Analog Output
Yes
(non-inverting)
Yes
(inverting)
Storage Buffer
512 points
3000 points
Best V Source
Resolution
Resolution
1 mV
0 .2 mV
6487
Picoammeter/ Voltage Source
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