electronic sight glass

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Old 05-09-03, 12:04 PM
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electronic sight glass

has anybody ever charge using an electronic sight glass. One of the old timers here at the complex will hook the sight glass on the opposite side of the metering valve and once he hears gas, he backs off. any opinions.
 
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Old 05-09-03, 02:14 PM
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I have used it for refrigeration and verifying suction leaks in oil lines.

I'm not sure the old timer is using it correctly. My way of setting a charge with it is to make sure the outdoor coil is clean and charge until there are no bubbles at the liquid line leaving the condensor. You can charge slightly beyond that if the outdoor temperature is below 60 but it puts you very close without overcharging.

Ken
 
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Old 05-09-03, 05:05 PM
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electronic?

have seen physical look at the refrigerant sightglasses, but what is electronic?
 
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Old 05-09-03, 05:26 PM
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It uses doppler shift technology to sense whether a tube is completely empty or completely full. In our case we want it to be full with no bubbles. You just put two small pickups on the line about 6 inches apart and turn it on. It has about 6 small LEDs that cascade to show how much gas is in the line. When the LEDs are all out, the line is full of liquid. It is pretty cool. Not something to use on every job but nice to have in the bag-o-tricks.

Useful when suspecting a suction leak on a buried oil tank supply line.

Ken
 
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Old 05-10-03, 03:18 PM
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thanks ken

amazing at the technology used these days! this is exactly why i love this forum, i learn all the time!
 
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