5730A
Getting Started Manual
42
52120A Electrical Performance Limits
Voltage compliance developed across inductive loads may prevent range maximum current output being achieved at
higher frequencies. The appropriate maximum frequency (Fmax) for a given load inductance and current is given by:
Fmax =
4.5 I = Current
2
•π•I•L
L = Total
inductance
The maximum frequency calculated with this equation is only approximate. Series resistance and parallel capacitance
also affect the maximum achievable frequency.
Input Common Mode Rejection ........................... 80 dB @ DC decreasing linearly to 40 dB at 10 kHz
Input Impedance
Voltage input ....................................................... >1 MΩ
Current input ....................................................... 10 Ω
Maximum Output Compliance Voltage ............... 4.5 V rms (6.4 V pk), 6.4 V dc. 120 A range maximum compliance
voltage decreases from 4.5 V at 1 kHz to about 3 V at 10 kHz
DC Offset ............................................................... Magnetic remanence that follows abrupt changes in output current
level may cause small changes to DC current offset. It is good practice
to correct for offsets in DC measurements and techniques such as DC
reversal measurement will result in best accuracy.
Operated within 5730A Control Loop (all current ranges)
The current specification of the 52120A, when controlled by a single 5730A, applies to the parallel output of up to three
52120As connected as slaves.
Coverage factor k=2.58 (99 % confidence level)
Current Specification
Frequency
1-year, tcal
[1]
±5 °C ±(% of output + % of range)
5730A
% of output % of range
DC 0.015 0.010
10 Hz to 850 Hz 0.011 0.003
850 Hz to 6 kHz 0.052 0.005
6 kHz to 10 kHz See Operated Stand Alone current specification table in the 52120A Users Manual.
Notes:
1. tcal is the temperature at which calibration adjustment took place.
Maximum inductance for stability LCOMP OFF is 100 μH. Maximum inductance for stability LCOMP ON is 400 μH for 2 A and 20 A
ranges. 100 μH on the 120 A range.
With LCOMP ON, the output is limited to 7.2e3 A-Hz. For example, a 100 A output is limited to 72 Hz.
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