Keysight U8001A, Руководство пользователя и сервисное руководство

Страница: 59 / 81

Service Guide 5
Keysight U8001A/U8002A User’s and Service Guide 59
Test consideration
For optimum performance, all procedures should comply with the following
recommendations:
– Assure that the calibration ambient temperature is stable and between 20 °C
and 30 °C. Ideally the calibration should be performed at 25 °C ±1 °C.
– Assure ambient relative humidity is less than 80%.
– Allow one hour warm up period by power on the power supply. During warm
up period, set the power supply to maximum programmable voltage and
current. Then, enable the output.
– Keep the test setup connection cables as short as possible.
Resistive Load (R
L
) – 10 Ω /90 W (for U8001A)
– 6
Ω
/150 W (for U8002A)
Measures ripple and noise PV
Current Monitoring
Resistor (Shunt) (R
M
)
– 0.01 Ω ± 0.1%
– TCR less than 20 ppm/ºC
ISOTEK Co.
Model A-H
Current monitoring
resistor
PV
C
[a] PV = Performance Verification
[b] C = Calibration
Table 5-2 List of equipment (continued)
Equipment Requirement(s) Recommended model Purpose Used