CWT GFM A0A0161 - 5.0 Gas Flow Surge Peak Measurement; 5.1 Peak Flow Measurement Description; 5.2 Enabling Peak Flow Measurement

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5.0 GAS FLOW SURGE “PEAK” MEASUREMENT

5.1 Description

The GFM has a peak value "sample and hold" feature. This allows the user to

measure the maximum gas flow rate, which occurred during the welding cycle. The

maximum value is the result of a gas surge, which occurs when the gas solenoid is

activated. The trigger used to determine the time at peak is the “Max Limit” value.

The time above this level is measured and displayed. Whenever the Flow rate

exceeds this value the time is accumulated. When the flow stops the GFM will

display the Peak flow and the accumulated time above the max limit. When the flow

starts again the values are cleared and new values are displayed.

5.2 Setup

To enable the Peak flow and set the High limits and test parameters press both “▼”

and "▲" switch simultaneously to enter the “Select Para INC/DEC” mode. The

first programmable parameter will appear on the display. To increment through the

program menus press the “▲” button. To decrement through the menus press the

“▼” button. Until the “Enable Peak?” option is displayed. To edit a menu option

press both “▼” and "▲" switch simultaneously to enter the “Edit Para INC/DEC”

mode. To toggle the option to “YES” press the “▲” button. To end the “Edit Para

INC/DEC” press both “▼” and "▲" switch simultaneously to exit and return to the

normal display mode. The “Peak= ### ##.# sec” window will be displayed and the

Peak function will be enabled.