Assessments - 5, GPA: 4.4
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OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, patient-connected applications. PX791 & PX792 SERIES OMEGA® SANITARY PRESSURE TRANSDUCER INSTRUCTION SHEET WARNING! This instrument is susceptible to damage when exposed to static electrical charges. To avoid damage to the transducer observe the following: • Ground the body of the transducer BEFORE making any electrical connections • When disconnecting, remove the ground LAST. NOTE: The braided shield and drain wire in the cable (if supplied) is not connected to the transducer body, and is not a suitable ground. CAUTION: Pressure spikes in excess of the rated overpressure capabil ity of the transducer may cause irreversible electrical and/or mechanical damage to the pressure measuring and containing element(s). Mounting Although the unit can withstand normal vibration without damage or significant output effects, it is always good practice to mount the transducer where there is minimum vibration. Be sure to use a gasket that does not interfere with the sanitary diaphragm. If the gasket I.D. is smaller than 1.50 inches, an offset due to clamping force will occur. Power Supply The supply voltage for the 1-5 and 1-6 Vdc output transducers must be within the range of 10 to 36 Vdc. The maximum supply voltage for a 4-20mA current output transducer is 36 Vdc while the minimum supply voltage is dependent upon the loop resistance of the circuit. Refer to Figure 1. The loop supply voltage vs. loop resistance shows the minimum supply voltage (Vmin) required for a given loop resistance (RLOOP). Excitation (Ratiometric Output Only) For proper operation a voltage within the range of 5 to 10 Vdc must be applied between the transducer’s supply terminals. Noise For minimum noise susceptibility, avoid running the transducer’s cable in a conduit that contains high current AC power cables. Where possible avoid running the cable near inductive equipment. Shield Wiring Connect the braided shield to the guard terminal on the reading instrument (meter, etc.) if available or to ground or to the power supply negative terminal. Adjustment Potentiometers The zero and span pots are accessible through the top of the case. Loosen the four screws and separate the top carefully. The zero pot is marked with a white dot. Vent Tube The cable will have a clear Teflon vent tube that's required at pressure below 500 psi to provide atmospheric reference. The open end should be placed in a dry area. Life Support Policy These products are not authorized for use as critical components in life support devices or systems. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Figure 1. Loop Supply Voltage vs. Loop Resistance Loop Supply Voltage vs. Loop Resistance for 4-20mA Output Only Loop Supply Voltage (Vdc) Vmin = 10V + [.022A*(RL)] *includes a 10% safety factor RL = RS + RW RL = Loop Resistance (ohms) RS = Sense Resistance (ohms) RW = Wire Resistance (ohms) Loop Resistance (Ohms)1000 750 500 250 0 0 36 2010 1182 30 PX791 & PX792 Series Dimensions A B C D MODEL A B C D SERIES S15 0.8 4.7 0.9 2.0 PX791 S20 0.8 4.7 0.9 2.5 PX792 PX791 & PX792 SANITARY TRANSDUCERS – ELECTRICAL CONNECTIONS Voltage Output Units 1-5, 1-6 Vdc CABLE TYPE F2 Red = + Power White = Common Green = Output CABLE TYPE C1 Red = + Power White = Common Green = Output HIRSCHMANN TYPE PIN-1 = + Power PIN-2 = Common PIN-4 = Output BENDIX 4-PIN, 6-PIN Pin A = + Power Pin B = Output Pin D = Common Current Output Units 4-20mA CABLE TYPE F2 Red = + Power Black = Power CABLE TYPE C1 Red = + Power Black = Power HIRSCHMANN TYPE Pin-1 = + Power Pin-2 = Power BENDIX 4-PIN, 6-PIN Pin A = + Power Pin B = Power Ratiometric (mV/V) CABLE TYPE F2 Red = + Power White = – Power Green = + Output Black = – Output CABLE TYPE C1 Red = + Power White = – Power Green = + Output Black = – Output HIRSCHMANN TYPE Pin A = + Power Pin B = + Output Pin C = – Output Pin D = – Power BENDIX 4-PIN, 6-PIN Pin A = + Power Pin B = – Power Pin C = + Output Pin D = – Output Pin E = Shunt Cal. Pin F = Shunt Cal. WARNING: READ BEFORE INSTALLATION T...
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