Answer Posted / vidal r. ramoso

ok, deadweight calibrator is an intrument with hydraulic
pressure having lifting piston with plat round platform use
to carry plate with round plat massess with standard value
use as a standard reference to clibrate pressure gauge or
any other pressurize instrsument. while the pressure
comparator is having standard calibrated pressure/vacuum
gauge use as a reference to check pressure/vacuum gauge.
pneumatic transmitter, etc.not to calibrate

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