Model 735 Intelligent Display User's Manual - Paroscientific, Inc.

GAUGE UNITSUnits equipped with gauge pressure transducers have two pressure ports.Pressure should only be applied to the positive pressure port. Thenegative pressure port must remain vented to atmospheric pressure.WARNING Consult the Model 745 or Digiquartz® pressure transducerSCD for proper pressure fitting tightening torque. Do not apply excessivetorque or permanent damage to the pressure fitting may result.WARNING When connecting pressure fittings, always use a secondwrench to stabilize the pressure fitting on the Model 745 or Digiquartz®pressure transducer, or permanent damage to the Model 745 orDigiquartz® pressure transducer may result.WARNING All Digiquartz® pressure transducer are designed to operateover a specific pressure range. Do not overpressure the Model 745 orDigiquartz® pressure transducer, or permanent damage may result.CAUTION Transducers that are intended to be used in liquid pressureapplications are oil-filled at Paroscientific. If your Model 745 orDigiquartz® pressure transducer is oil-filled, do not pull a vacuum orpressurize with gas, or gas bubbles may be introduced into the pressuretransducer, which will negatively affect its performance. Pressure linesconnected to oil-filled transducers should be filled with clean hydraulicfluid and bled to remove gas bubbles. Consult the Model 745 orDigiquartz® pressure transducer SCD to determine the oil used to fill thetransducer.CAUTION Pressure head effects result in zero offsets. These effects aremore pronounced when liquid-filled pressure lines are being used. Theseeffects can be minimized by keeping the transducer pressure port and thepressure source at the same elevation, or by using the tare or pressureadder functions to make an offset correction to compensate for thepressure head.QUICK START 3-6