User`s guide
Agilent B2900 User’s Guide, Edition 2 2- 25
Introduction
Specifications
• High Capacitance mode working conditions:
• V/I mode: Voltage source mode only
• Range: Current measurement range is limited to fixed range only. 10 nA and
100 nA ranges are not available.
• Current limit: 1 A
Resistance Measurement
Resistance measurement can be performed under either auto or manual test
conditions. Auto resistance measurement is performed in current source and voltage
measurement mode. The total auto resistance measurement error is shown in
Table
2-15. The total error of a manual resistance measurement can be calculated using the
voltage and current accuracy information as shown below.
• Source I mode, manual ohm measurement (4-wire):
Total error = Vmeasure / Isource = R reading (gain error of V range + gain
error of I range + offset error of I range / I source value
100) % + (offset error
of V range / I source value)
where, gain error and offset error can be given by Table 2-9 and Table 2-10.
• Source V mode, manual ohm measurement (4-wire):
Total error = Vsource / Imeasure = 1/ [1/R reading (gain error of I range + gain
error of V range + offset error of V range / V source value
100) % + (offset
error of I range / V source value)]
where, gain error and offset error can be given by Table 2-8 and Table 2-11.
• Measurement speed = 1 PLC
• Applicable for temperature: 23 C 5 C
• Example of total error calculation:
I source value = 1 mA at 1 mA range
V measure range = 2 V range
Total error (% reading + offset) = (0.02 % + 0.02 % + 200 nA/1 mA 100) % +
(350V/1mA) = 0.06 % + 0.35
System Speeds
• Maximum sweep operation reading rates (reading/second) for 50 Hz: See Table
2-16.