3-2 Basic Operation Models 2500 and 2502 User’s Manual
Operation overview
Measurement and voltage bias capabilities
The Model 2500 has the following measurement and voltage bias capabilities:
• Measure Current — Each Model 2500 channel can measure DC currents from ±1fA
to ±20mA. Each channel has eight current ranges: 2nA, 20nA, 200nA, 2µA, 20µA,
200µA, 2mA, and 20mA.
• Source Voltage — Each Model 2500 channel can output DC voltage from ±500µV to
±100V. Each channel has two ranges: 10V and 100V.
NOTE Both channel 1 and channel 2 are floating and independent of one another.
Ranges
Table 3-1 summarizes current measurement ranges, resolutions, and maximum readings
while Table 3-2 lists voltage bias source ranges, resolutions, and maximum voltage and
current. See Section 6 for more details on ranging.
Table 3-1
Current measurement ranges
Model 2500
I-range
Maximum
resolution
Maximum
reading
2nA
20nA
200nA
2µA
20µA
200µA
2mA
20mA
1fA
10fA
100fA
1pA
10pA
100pA
1nA
10nA
±2.1nA
±21nA
±210nA
±2.1µA
±21µA
±210µA
±2.1mA
±21mA
Table 3-2
Voltage source ranges
Model 2500
V-range Resolution
Maximum
voltage
Maximum
current
10V
100V
400µV
4mV
±10V
±100V
20mA
20mA
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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