WAGO I/O-SYSTEM 750 Manual

Also see for I/O-SYSTEM 750: Manual Manual Technical description User's installation and configuration Manual

Contents

WAGO I/O-SYSTEM 750 Manual Manual pdf 57 page image

57 Commissioning WAGO-I/O-SYSTEM 750750-597 8AO 0-10V/±10V DCManualVersion 1.0.0Pos: 38 /Serie 750 (WAGO-I/O-SYSTEM)/In Betrieb nehmen/Kalibrieren/Kalibrieren 750-0597 @ 25\mod_1453474855543_21.docx @ 199156 @ 23 @ 17.2 Calibrating Process ValuesManufacturer calibration serves to compensate for tolerances in electricalcomponents of the I/O module. User calibration allows you to compensate for thetolerances of electrical components of both the I/O module and connected devicesand to take into account factors such as component age and different ambienttemperatures at the installation site.User calibration by channel required!Perform the calibration for each channel individually to achieve the greatestpossible measurement accuracy for each channel.The following signal types are specified:Table 31: Signal TypesID Signal type Voltage range1 0-10 V 0 V … +10 V2 +/- 10 V −10 V … +10 VThe variables in the following equations have the following meaning:Table 32: Variable Legend – Calibrating Measured ValuesVariable Explanationm Calibration gain (gain factor)b Calibration offset (offset)x1 Expected output voltage 1x2 Expected output voltage 2y1 Process value 1y2 Process value 2The “Gain” and “Offset” values are required to perform user calibration. Thecalibration gain is the factor by which the process value is amplified. Thecalibration offset is the offset of the process value on the y axis.The following general calibration equation applies:y = (x + b) × mThe general calibration equation yields the following two equations forcalculating the two values sought:Calibration gain: m = (y2 – y1) / (x2 – x1)Calibration offset: b = y1 – (m × x1)