95x Series Operating Manual - May 17, 2022
Page 54 of 155
calibration standards used. Add ½ digit to all accuracies for displayed results (results available with enhanced
resolution from interfaces).
LOADING CAPABILITY
The listings below show the maximum loading current and power capabilities of the 95x at ambient temperatures
≤30C. For ambient temperatures above 30C linearly reduce the maximum loading current and power by 1%/C.
For frequencies above 100Hz other than 400Hz, the user should linearly interpolate using the <100Hz and 400Hz
capabilities shown in the applicable listing.
Where both a current and power limit is shown, the most stringent limit applies.
951i-954i and 957i, <100Hz : 50mArms (40mArms resistive), reduce by 0.08mA per V above 5525Vrms
951i-954i and 957i, 400Hz : 35mArms, reduce by 0.065mA per V above 5600Vrms
Option AC-2, <100Hz : 200mArms (135mArms resistive), reduce by 0.67mA per V above 1750Vrms
Option AC-2, 400Hz : 140mArms, reduce by 0.4mA per V above 1700Vrms
Option 500VA, <100Hz : 100mArms (50mArms resistive), reduce by 0.14mA per V above 5425Vrms
500VA
Above 65mArms has a limited test time (e.g., 1sec at 100mArms)
Option 500VA, 400Hz : 85mArms (50mArms resistive), reduce by 0.11mA per V above 5375Vrms
Above 65mArms has a limited test time (e.g., 1sec at 100mArms)
955i and 957i Opt. AC-10, <100Hz : 30mArms (20mArms resistive)
955i and 957i Opt. AC-10, 400Hz : 22mArms
Option AC-30 : 10mArms (7mArms resistive)
250VA
SURGE CURRENT LIMITING AND SHUTDOWN
Impedance Limiting 951-4i and 957i (standard build) : 12KΩ + 0.5H
Opt. 500VA : 7KΩ + 0.25H
Opt. AC2 : 1.4KΩ + 0.2H
955i and 957i Opt. AC10 : 25KΩ + 1.0H
SOURCE set to EXT : 200KΩ
Peak Shutdown Current 951-4i and 957i (standard build) : 120mA
Opt. 500VA : 145mA
Opt. AC2 : 280mA
955i and 957i Opt. AC10 : 60mA
SOURCE set to EXT : 21mA
DUT GROUNDED set to YES : 50mA
TEST VOLTAGE AND FREQUENCY
Test Voltage Range 951-4i and 957i (standard build or Opt. 500VA) : 20 to 6000Vrms, reduce maximum
voltage by 0.6V per Hz above 100Hz
955i and 957i Opt. AC-10 : 50 to 10000Vrms, reduce maximum voltage by 1V per
Hz above 100Hz
Opt. HSS or HSS-2 : 20 to 4000Vrms
Opt. AC-2 : 10 to 2000Vrms, reduce maximum voltage by 0.2V per Hz above 100Hz
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