Helium Leak and Performance Test Systems
Serv-I-Quip has developed additional test cycles for manufacturers wishing to take the testing and quality verification of their a/c systems one step further. A helium leak test cycle and a final performance test cycle can be integrated into the a/c filling process to confirm the system is leak free and operates to specification.
Helium Leak Test
The helium leak test initiates the filling cycle by charging the unit with helium. DataServ.NET provides specific instructions, illustrations, and input requirements that guide the operator through a sniff test of the system. Pass / Fail results and leak location is recorded to product serial # file.
Process Sequence:
- Product bar code is scanned
- High and low side tooling is connected
- Start button initiates cycle
- Product is vacuum tested, then pressure tested with Helium
- DataServ displays each leak test point
- Operator sniff tests and confirms for each location
- Vacuum, pressure, or leak test failure initiates visual and audible alarm
- Operator manually chooses a leak location and root cause from a displayed drop down list for failed units
- If unit passes all leak tests, operator confirms and process proceeds to refrigerant charging
- All testing parameters and results are recorded to DataServ
Performance Run Test
If your available processing time (takt time, max cycle time) exceeds 10 minutes, a performance run test option can be added to your leak testing and a/c filling cycle as a final verification that the unit performs to the specifications required. This results in a single point process that includes system leak test, product evacuation, oil fill, refrigerant fill, and a unit operation and performance test. Typical test points include compressor inlet and outlet temperatures, suction and discharge pressures, vent temperature, ambient temperature, and ambient humidity. DataServ records all data, calculates superheat and discharge pressures, and compares values to performance specifications. Test instruction and prompting is accomplished through DataServ also.Process Sequence:
- Operator is prompted to start engine and turn on a/c unit
- Operator attaches compressor suction and vent discharge temperature sensors
- High and low side tools sense differential pressure to initiate test
- Unit is run and stabilized for pre-set time
- Superheat and discharge pressures are calculated against ambient temperatures and humidity
- Unit passes or fails, all test data written to unit serial # file in DataServ