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MAS2600: Testing and Re calibration Reference Manual October 2022 RM 6000-01-001-23 41Recalibrating the Absolute Transmitter using Pressure on  the Transducer Caution! Please observe that testing and recalibrat ion of transmitters mounted in hazardous  areas shall be carried out by Ex qualified personnel. When recalibrating the MAS2600 Absolute Transm itter a pressure calibrator with a range of  -1 to 3.5 bar should be used. It sh ould have an accuracy of 0.05% FS or better, as well as a 4½ digit  milliampmeter. If a calibrator wi thout reference transmitter is used , the atmospheric pressure must  be known to calculate the correction.  Atmospheric pressure and Transducer range  to be entered into the formulas as mbar. 1.The calibrator with the output selector switch  set to pressure mode is connected to the  MAS2600 transmitter via MAS2600 Test Cup, type G022S100 (DPI610 and DPI603) or type  G022S103 (DPI802P CAL KIT).
8.Check the linearity at 0-25-50-75 an d 100% of the measuring range. 9.If necessary, repeat the steps 5 to 8. Note! If the calibrated maximum water gauge is greater than the maximum water gauge that  can be generated by the vacuum calibrator, th e proportional mA output signal equal to  the maximum vacuum signal  should be calculated. Example: If the full-scale of the transmitter is 15 mH2O, and the maximum capacity of the vacuum calibrator is  7.5 mH2O, the mA output signal at 7.5 mH2O is calculated as: 15 mH2O = 20 mA and 0 mH2O = 4 mA 7.5 mH2O =  4 + ((20 - 4) * 7.5) / 15 = 12 mA The span potentiometer is adjusted so that the output  signal shows 12 mA at 7.5 mH2O.

Intrinsically Safe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30 Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3 5 Testing and Recalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Testing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38 Recalibrating Gauge Transmit ter using Pressure on t The response should be in all capital letters.
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