Which statement correctly describes the PPS range for GTAW-P inverter power sources?

• A. The PPS range is 0.5 to 500
• B. The PPS range is 5 to 50
• C. The PPS range is 50 to 1000
• D. The PPS range is 0.05 to 0.5

Answer: (A)

PPS in this context means pulses per second—the pulse frequency of the GTAW-P arc when using an inverter power source. A typical GTAW-P inverter offers a wide range of pulse frequencies to control heat input and bead characteristics. The standard spec spans from about 0.5 PPS up to about 500 PPS, which covers very slow pulsing for delicate, low-heat welds and very fast pulsing for higher heat control and faster welding. The range 0.5 to 500 matches this practical capability, making it the correct description. The other ranges are either too narrow or don’t correspond to the common inverter GTAW-P pulse-frequency performance.