The system is a small self contained a/c unit on a ship for cooling some sort of coms room. Sea water condenser and its on r134a (approx 3kg)(relatively small charge).
Apparently according to the spec we've been given we have to Vac it bellow 2 torr and it can't rise to above 4 torr in 24hrs blah blah blah.
We've replaced the condenser, Gauges and dryer.
So, whilst evacuating the system initially on the liquid valve and schrader port on the suction, had a digital torr gauge inline on the liquid valve. He wanted to use the analogue torr gauge because its calibrated for the customer.
The lines are javac safe seal so can stop depressing the schrader before removing the line, (not a problem of ingress of air/moisture when removing etc) but then he wants to add the torr gauge with the line currently at atmospheric pressure to the system. The line is 72" and the digital gauge was reading 0.68torr, when the schrader is depressed with the analogue gauge attached it reads around 10 torr and the digital gauge rose to around 5 torr.
Now, I mentioned wouldn't doing this affect the Vac and torr reading but he was adamant it won't. More annoyingly he did it a further 2 times because he was convinced it won't affect it and it must be the line that's leaking and causing the rise. And obviously the readings rose again.
Am I right in thinking this should affect the torr reading?
Thanks in advance! (Also on mobile so sorry about formatting)
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