model 2704 controller installation and operation handbook - Soliton

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Transducer Scaling 2704 Controller 19.2.1. To Calibrate a Strain Gauge Bridge Transducer The controller must have been configured for Cal Type = Shunt, and the transducer connected as shown in Figure 2-13 using the ‘Transducer Power Supply’. Then:- Do This This Is The Display You Should See It is first necessary to enable calibration as follows:- Additional Notes 1. From any display press as many times as necessary to access the page header menu 2. Press or to select ‘TXDCR SCALING’ 3. Press to show Subheaders 4. Press or to select ‘Txdcr 1’ (or 2 or 3) The choices are : Txdcr 1 Txdcr 2 Txdcr 3 This text can be user defined 5. Press to show the parameter list 6. Press again to select Enable Cal 7. Press or to On This parameter remains ‘On’ once it has been set. It requires to be switched ‘Off’ manually. It may be wired to an external digital input source such as a key switch 19-4 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr -00
2704 Controller Transducer Scaling Set the strain gauge bridge to its ‘zeroed’ condition 8. Press as many times as necessary to scroll to Scale Low This will normally be zero 9. Press or to enter the low end calibration value 10. Press to scroll to Scale High 11. Press or to enter the high end calibration value In this example a value of 8000 is chosen which may represent 80% of the 0 -10,000psi range of a pressure transducer. 12. Press to scroll to Start Pnt 1 Cal 13. Press or to enter On This parameter can be configured to be initiated from a digital input and wired, for example, to an external switch. If this has been configured this parameter can be turned on from this source. - Tip: To backscroll hold down and press The controller automatically performs the procedure described in Section 19-2. During this time the Cal Active parameter will change to On. When this parameter value changes back to Off the calibration is complete. The Shunt State parameter will also change during the procedure to show when it is being connected (On = connected, Off = disconnected). Note:- It is possible to start the calibration procedure before the system has settled at a stable value. The controller continuously takes blocks of 50 samples. When the average value between two consecutive blocks is within the ‘Threshold Value’ the controller will then calibrate. The Threshold Value defaults to 0.5 but can be adjusted in configuration level. If the readings are not stable within this period the controller will abort the calibration. Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 19-5
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2704 Controller Contents MODEL 2704
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model 2704 controller installation and operation handbook - Soliton

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