Current sense test -20, Current sense test – Hypertherm HT4400 HySpeed Plasma Arc Cutting System User Manual
Page 111
MAINTENANCE
5-20
HT4400
Instruction Manual
3
Current Sense Test
The signals from the current sensors can be measured as voltages. Use the table and figure below to check for
proper current levels when the power supply is ON and the torch is cutting.
WARNING
SHOCK HAZARD: Always use caution when servicing a power supply when plugged in and
the covers are removed. Dangerous voltages exist within the power supply which could
cause injury or death.
REC9
REC10
REC5
REC6
REC7
REC3
REC4
Chopper
Measurement Point
Output Value
CH1
REC9 pins 3 & 4
4 V = 100 amps
CH2
REC5 pins 3 & 4
4 V = 100 amps
CH3
REC6 pins 3 & 4
4 V = 100 amps
CH4
REC7 pins 3 & 4
4 V = 100 amps
Total Current
REC10 pins 3 & 4
3.2 V = 400 amps
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