1066 Liquid Analytical Transmitter - Emerson Process Management

1066 Instruction Manual Section 9: CalibrationLIQ_MAN_1066 September 20139.2.2Manual Calibration – pHNew sensors must be calibrated before use. Regular recalibration isalso necessary. Use manual calibration if non-standard buffers arebeing used; otherwise, use auto calibration. Auto calibration avoidscommon pitfalls and reduces errors. The adjacent appears afterselecting Manual pH calibration.1.234µS/cm 25.0ºCSN pH Manual CalBuffer 1Buffer 29.2.39.2.4Entering a Known Slope Value – pHIf the electrode slope is known from other measurements, it can beentered directly in the 1066 transmitter. The slope must be entered asthe slope at 25°C.Standardization – pH1.234µS/cm 25.0ºCSN pH Slope@25ºC59.16 mV/pHThe pH measured by the 1066 transmitter can be hanged to matchthe reading from a second or referee instrument. The process of makingthe two readings agree is called standardization. During standardization,the difference between the two pH values is converted to theequivalent voltage. The voltage, called the reference offset, is added1.234µS/cm 25.0ºCSN Enter Value07.00pHto all subsequent measured cell voltages before they are converted to pH. If a standardized sensoris placed in a buffer solution, the measured pH will differ from the buffer pH by an amount equivalentto the standardization offset.This screen may appear if pH Cal is unsuccessful. An Offset Error willgenerate this screen display:If the pH Cal is successful, the screen will return to the Cal sub-menu.1.234µS/cm 25.0ºCSN StandardizeOffset ErrorCalculated: 96mVMax: 60mVPress EXIT9.2.5SMART sensor auto calibration upload – pHAll calibration data including slope (mV/pH unit), offset (mV), glass impedance (MegOhms), andreference impedance (kOhms) is automatically downloaded to the SMART sensor upon successfulcalibration. This data transfer to the sensor is transparent and does not require any user action.Calibrated SMART sensors will be loop-calibrated when wired or attached (via VP8 cable connection)to any SMART-enabled Rosemount Analytical instrument.To calibrate any SMART sensor, choose any available calibration method. Note that new SMARTsensors upon first shipment from Emerson are pre-calibrated and do not require buffer calibrationor standardization to be used in process immediately.Calibration 73