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CEBORA S.p.A.
3.3.4 - In open circuit operation, the output voltage is not regular.
OPEN-CIRCUIT OUTPUT VOLTAGE TEST.
For better precision, voltage measuring in this test must be carried out with power source
output terminals (D and E fig. 3.2.1) disconnected from earth.
Output terminal – power source (-) and output terminal + power source (+) = +80 Vdc
q
approximately, after "lamp-test" phase.
♦ Check the connection between the "-" and "+" terminals on the power board (15),
and "-" and "+" output terminal of the power source. If you find loose
connections, tighten and replace any damaged terminals.
♦ Replace the power board (15).
♦ Correct operation.
3.3.5 - In resistive load operation, the output voltage is not regular.
OUTPUT VOLTAGE TEST ON RESISTIVE LOAD.
For the following tests use a resistive load capable of withstanding the maximum power
source current. The appropriate values are shown in the table.
For better precision, voltage measuring in this test must be carried out with power source
output terminals (D and E fig. 3.2.1) disconnected from earth.
Process
TIG
MMA
Turn knob (A) clockwise to the maximum current value.
q
Output terminal - power source (-) and output terminal + power source (+) = voltage values as
q
in the table, adjustable using the knob (A).
♦ Check the connection between the "-" and "+" terminal on the power board (15),
and "-" and "+" output terminal of the power source. If you find loose
connections, tighten and replace any damaged terminals.
♦ Check connections between potentiometer TM1 and power board (15).
♦ Check integrity of potentiometer TM1. If defective, replace it.
♦ Replace the power board (15).
♦ Correct operation.
3.302.050
Correct?
YES
Resistor resistive
load
0,117 ohm
0,194 ohm
Correct?
YES
NOTE
NO
NOTES
Maximum output
current
130 Adc
130 Adc
NO
Power source
output voltage
+ 15 Vdc, approx.
+ 25 Vdc, approx.
22/12/00
9
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