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Wiring of Setpoint Output
Set-Up Parameters-cont.

TM-5-3895-374-24-1 Paving Machine Bituminous Material: Crawler Mounted Diesel Engine Driven Manual
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TM 5-3895-374-24-1 GP470FA Usings terminals SP and +5v will result in the output signal being normally LO (0v) and going HI (+5V) when setpoint weight is reached.  This output will sink 20 ma, suitable for driving a solid state relay (CRYDOM TD120 or equivalent).  See Section II Operation for a description on how to operate the setpoint feature. FIG. 5 - KEYBOARD WHILE IN CALIBRATION MODE SECTION III - CALIBRATION How to Enter the Calibration Mode The Calibration Mode is accessed by pressing the Channel number (1,2, or 3) and the Calibration key [9]. For example: To calibrate Channel 1 press [1] [9] {SELECT] accessed To calibrate Channel 2, press [2] [9] [SELECT] To calibrate Channel 3.  press [3] [9] [SELECT] The display will now flash ‘Press’, asking you to press the pushbutton accessed through the small hole at the back of the indicator. You must press this button within 30 seconds of selecting Calibration Mode.  If the button is not depressed in time, the indicator will return to the previous display and you must repeat the above procedure. When the Calibration Mode has been enabled, a flashing 'I' will appear in the far left display digit. NOTE: In Calibration Mode the keypad is different as most of the keys change their function.  Please refer to the illustration on the opposite page to familiarize yourself with the key functions. Note especially the following [ON/OFF] becomes [WEIGHTS/COUNTS] to select between display of scale weight or internal counts.  A flashing 'A' in' the leftmost digit indicates internal counts displayed. [TARE] becomes [ENTER] to allow entry of any change in parameters and calibration values. Set-Up Parameters In order to calibrate the indicator, certain parameters mist be set up first before weights are applied on the scale.  The indicator should first be set up for graduation size, overweight, motion window, push to zero range, etc.  The reason for this is, if the dead load is set or the span is calibrated and one of the indicated parameters is changed afterwards, the span or the dead load might change as well. (page 3- 62)







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