Gas flows (cont.)
앮
P
앮
NP
16. Perform gas leak test
A. Oxygen pressure drop at ____________
psi in 10 minutes ( ____________ bar)
B. Nitrogen pressure drop at ____________
psi in 10 minutes ( ____________ bar)
앮
P
앮
NP
17. Inspect for hose restrictions
앮
P
앮
NP
A. Motor valve hoses
앮
P
앮
NP
B. Gas console to motor valve
앮
P
앮
NP
C. Off-valve to torch body
앮
P
앮
NP
D. Hoses in power track
Cable connections
앮
P
앮
NP
18. Inspect cables
앮
P
앮
NP
A. Command THC
앮
P
앮
NP
B. Control cable from off-valve to
motor valve console
앮
P
앮
NP
C. From motor valve console to
power supply
앮
P
앮
NP
D. From ignition console and gas
console to power supply
Ignition console
앮
P
앮
NP
19. Inspect for moisture, dust and
particulates
앮
P
앮
NP
20. Inspect spark gap subassembly
앮
P
앮
NP
21. Inspect torch leads
System grounding
앮
P
앮
NP
22. Inspect for proper system
component grounding
앮
P
앮
NP
23. Inspect connection from cutting
table to workpiece (+) lead
Power supply
앮
P
앮
NP
1. Inspect for particulates and blow out
앮
P
앮
NP
2. Inspect wiring harnesses
앮
P
앮
NP
3. Inspect main contactor
앮
P
앮
NP
4. Inspect pilot arc relay
Coolant system
앮
P
앮
NP
5. Inspect filter element
앮
P
앮
NP
6. Perform coolant flow test
A. Coolant flow checked at _________
gallons per minute ( _________ l/min)
Torch main body
앮
P
앮
NP
7. Inspect water tube
앮
P
앮
NP
8. Inspect current ring
앮
P
앮
NP
9. Clean threads on torch front end
앮
P
앮
NP
10. Inspect Vespel torch insulator
앮
P
앮
NP
11. Inspect torch and consumable o-rings
앮
P
앮
NP
12. Verify proper fit of retaining or shield cap
앮
P
앮
NP
13. Inspect hose fittings
앮
P
앮
NP
14. Inspect torch-to-torch-lead connections
Gas flows
앮
P
앮
NP
15. Inspect plumbing from gas supply
앮
P
앮
NP
A. Oxygen
앮
P
앮
NP
B. Nitrogen
앮
P
앮
NP
C. Air
앮
P
앮
NP
D. Nitrogen-Hydrogen
앮
P
앮
NP
E. Argon-Hydrogen
앮
P
앮
NP
F. Inspect compressed air filter system
Preventive Maintenance Protocol Checklist
Customer:
Location:
Contact:
Date:
Hypertherm system:
System serial #:
System arc hours:
(if equipped with an hour meter)
Comments
P–
Performed
NP –
Not present on system
Preventive maintenance performed by: Date:
General comments and recommendations:
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