VSU28

Option enables pressurizing the chamber.

Automatic formic acid refill is available for vacuum reflow ovens. If the level of formic acid in bubbler drops below certain level the system pumps formic acid from a container bottle. Container bottle is placed in a box.

Auto refill option enables equal amount of formic acid on every process run. It also minimizes the risk of injury during manual bunbbler refill.

Option is stronly recommended for production purposes where larger amount of formic acid is required.

Formic acid auto refill diagram (PDF)

An additional line is used for Helium, Argon, Nitrogen or other gas. It can be equipped with digital flowmeter or with needle valve.

1. Digital flowmeter is placed on the front panel like the other gas lines.

2. If needle valve is chosen the flow rate is adjusted from the back panel where valve is placed.

Note that if used for Helium the digital flowmeter readout will differ from the actual flow rate. The flowmeter can be setup for Air, N₂, Ar or CO₂

Vacuum reflow oven has standard build-in pressure transmitter. This transmitter is linear and measures from 0 to 1.6 bar abs (for models with overpressure capability up to 6bar abs) According to transmitter's manufacturer accuracy is 0.5% of its full scale. Therefore measurement below 5-10mbar could be inaccurate.

In addition to the pressure transmitter we offer full scale vacuum gauge for pressure from 5x10-4 mbar abs to atmospheric pressure.

Signal indication is offered in two kinds for vacuum reflow ovens

1. Buzzer only (default) Buzzer is placed on the front panel.

2. Buzzer + Green + Amber + Red light on the top of the display pole.

Signal indication diagram (PDF)

Use "star" connection like in Europe or "delta" connection like in US/Japan.