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Qualifications and Requirements
Coolant requirements
Add the correct type and amount of coolant before you operate the plasma cutting system.
Purity requirements for coolant water
Always use water that meets the specifications in the following table when using a custom coolant mix.

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Specifications
Qualifications and Requirements
- Document requirements
- Operator qualifications
  A person is considered qualified to operate the cutting system if he or she is trained and knowledgeable about cutting system equipment construction, operation, and work methods, and about how to recognize and avoid hazards that can be present with certain cutting system equipment or work methods.
- Qualifications of service personnel
  It can be hazardous to do service and maintenance on industrial cutting systems and equipment.
- System electrical requirements
- Process-gas requirements for all gas connect consoles
  You must supply the process gases for your cutting system.
- Shield-water requirements (VWI and OptiMix)
  If you use water as a shield fluid, use the following water pressure requirements, flow requirements, and water-purity guidelines.
- Torque specifications for gas or water plumbing and hose connections
  For the best results, use the recommended torque specifications for plumbing and hose fittings.
- Coolant requirements
  Add the correct type and amount of coolant before you operate the plasma cutting system.
  - Coolant requirements for operation between -10°C – 40°C (14°F – 104°F)
    Use the Hypertherm® premixed coolant for the usual operating temperature range for plasma cutting systems. Adjust the coolant mix to operate the system at temperatures that are colder than -10°C (14°F).
  - Coolant requirements for operation in temperatures above 40°C (104°F)
    Use the correct treated water mixture as coolant when you operate the cutting system at temperatures that stay higher than 40°C (104°F).
  - Flow requirements for coolant
    The correct coolant flow rate is necessary for cutting system operation. If the flow rate is too low or too high, the system will stop automatically to prevent damage.
  - Purity requirements for coolant water
    Always use water that meets the specifications in the following table when using a custom coolant mix.
- Requirements to put system components in position
- Torch mounting bracket requirements
  Make sure to use a torch mounting bracket that obeys the requirements for XPR® torches.
- Torch lifter requirements
  Use a torch lifter that has the correct weight capacity for XPR® torches.
- CNC requirements for plasma cutting systems
  There are specific Computer Numerical Control (CNC) features that are necessary for integration with plasma cutting systems.
- Recommended grounding and shielding
  It is important to use grounding and shielding best practices when you set up a plasma cutting system. This can minimize problems related to Electromagnetic Interference (EMI), or electrical noise.
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Coolant Installation
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Purity requirements for coolant water

Always use water that meets the specifications in the following table when using a custom coolant mix.

Water that is too pure can also cause problems. Deionized water can cause corrosion in the coolant system. After deionization, add benzotriazole (128020).

Use water purified by any method, such as deionization, reverse osmosis, sand filters, or water softeners, as long as the water purity meets the specifications in the following table. Speak with a water specialist for advice in choosing a water filtration system.

Table 1. Purity measurement methods for coolant water
Water purity level	Conductivity μS/cm at 25°C (77°F)	Resistivity mΩ∙cm at 25°C (77°F)	Dissolved solids or hardness (ppm of NaCl)	Grains per gallon (gpg of CaCO₂)
Pure water (For reference only. Do not use.)	0.055	18.3	0	0
Maximum purity	0.5	2	0.206	0.010
Minimum purity	18	0.054	8.5	0.43
Maximum potable water (For reference only. Do not use.)	1,000	0.001	495	25