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Operation Manual High pressure transducer model 8221

Operation Manual High pressure transducer model 8221
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Operation Manual High pressure transducer model 8221 - 1

Technical Product information Commissioning, Function, Fitting specifications High pressure transducer model 8221 The 8221 pressure transducer has been manufactured and calibrated with care. To benefit fully from its excellent measurement performance, we recommend that you follow the advice below when fitting the transducer: Mounting Screw the pressure transducer onto an adapter with external thread size 9/16-18UNF, taking care not to cross-thread. This adapter must be made of a tough material such as stainless steel. The sensor and adapter should be at about the same temperature when being fitted. Tightening torque: 100 Nm max As an additional safeguard, especially for dynamic loads or where vibrations occur, we recommend securing the screw thread with anaerobic adhesive. Sealing The transducer must be fitted with the sealing cone supplied. Mounting position The transducer should preferably be suspended when used to measure liquid media. This allows any air to escape automatically from the volume inside the transducer. For applications that carry solid particles in the medium, it may be advantageous to install the transducer upright. Overload An overload > 100 % of the upper range value (6 kbar max.) will alter the mechanical and electrical properties of the transducer. It is not the length of time for which the overload occurs but the magnitude of the overload that is critical. The switching of valves in hydraulic systems can cause significant pressure spikes. These must be attenuated to a level below the upper range value using suitable means, for instance by fitting restrictors upstream. Alternatively, a transducer with a larger measurement range may need to be used. - 1 -Technical changes reserved - burster praezisionsmesstechnik gmbh & co kg ■ Tel. +49-7224-6450 • Fax 64588 Latest updates of data sheet always under www.burster.com Talstr. 15 • DE-76593 Gernsbach ■ www.burstw.com - info@fcurstw.com

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Operation Manual High pressure transducer model 8221 - 2

Technical Product information Commissioning, Function, Fitting specifications High pressure transducer model 8221 Functions for transducers with built-in amplifier Please use these functions only once the transducer is fitted in place. The installation recommendation explains the following functions: 1 Autozero 2 Fine-Autozero 3 Calibration 4 Reset 1 Autozero This is how it works The Autozero function is activated by: 1 Position the magnetic pen near the Autozero label on the shell of the pressure transducer. 2 The magnetic pen has to be maintained on the Autozero position for 1 ... 10...

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Operation Manual High pressure transducer model 8221 - 3

Technical Product information Commissioning, Function, Fitting specifications High pressure transducer model 8221 Limits The maximum zero error with respect to the zero point must be within ±10 of full scale. Note The step duration time is 5 seconds. During resetting, a current of about 7mA appears at the output of transducers with a current output. Furthermore, it will be possible to have short overcurrent up to 7 mA between the step variations. There will be only a short variation visible during the Autozero phase. This won’t have any effects on the final result. 2 Fine-Autozero This is...

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Operation Manual High pressure transducer model 8221 - 4

Technical Product information Commissioning, Function, Fitting specifications High pressure transducer model 8221 3 Calibration This is how it works Start calibration 1 Activate the calibration by short-circuiting the CAL pins (E-F) for at least 1 second. Stop calibration 1 Release the CAL pins (E-F) short-circuit. Limits The maximum zero error with respect to the zero point must be within ±20 of full scale. Result During the calibration phase the signal will be unbalanced at 80% F.S. The calibration effect is visible 2 seconds after short-circuiting of CAL pins (E-F). The calibration...

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