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Mantracourt Electronics Limited

SGA/A & SGA/D User Manual

9

Example :-
The Switch Settings for a cut-off frequency of 50 Hz setting is illustrated below.

Note: SW4/6 must be ‘ON’ and SW4/7 must be ‘OFF’.

Table 3.5

SW3

1 2 3 4 5 6 7 8

50Hz

1

↑

1

↑

1

↑

1

↑

1

↑

1

↑

1

↑

1

↑

SW3

trrrrrrrrt

Output Current Mode and Input Filter Settings – Jumpers JP1, JP2 & JP3

Figure 3.2

Refer to Figure 2.4 for details of wiring connections to J1.

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Содержание SGA/A

Страница 1: ...SGA A SGA D Strain Gauge Load Cell Amplifier Signal Conditioner Issue 7 PCB onwards User Manual www mantracourt co uk...

Страница 2: ...n 7 Table 3 2 Switch 4 7 Table 3 3 8 Output Filter Settings Switch 3 8 Table 3 4 Switch 3 8 Table 3 5 9 Output Current Mode and Input Filter Settings Jumpers JP1 JP2 JP3 9 Figure 3 2 9 Span Gain Setti...

Страница 3: ...he SGA D which is DC powered only Transducer SENSITIVITY of between 0 1 mV V and 30 mV V are possible This is achieved by a combination of gain span DIP switches and associated fine adjustment by a po...

Страница 4: ...e easy access to interior of the module Install electrical protection device as the unit is not internally fused Always ensure the lid is properly fitted and all 4 screws tightened Always ensure the c...

Страница 5: ...ty of power supply Figure 2 2 Power Connection 220 230 V AC J 3 N 110 120 V AC N L L J 3 18 24 V DC J 1 Standard mains 2 or 3 core cable PVC sheathed unshielded cable will suffice for the power NOTE C...

Страница 6: ...y shielded in polyester tape Diameter 4 19 mm Impedance 54 Ohms Capacitance m core to core 115 pF core to shield 203 pF UK Farnell 585 646 Individually shielded twisted multipair cable 7 0 25mm 3 pair...

Страница 7: ...nal 15V supply on the SGA and the ve end is connected to the SGA output The current through the load is sunk by the SGA towards ground 0V N B In this mode neither connection to the output load is elec...

Страница 8: ...SW1 to twice the required mV V setting Table 3 6 Table 3 2 Switch 4 Analogue Output and Excitation Voltage Options SW4 SW4 1 2 3 4 5 6 7 8 10V 0 0 0 X X 1 Filter in 1 Filter out 1 10V Exc 0 5V Exc 5V...

Страница 9: ...he load cell The cut off frequency of the filter is set by the DIP switch SW3 as illustrated in the table below Table 3 4 Switch 3 SW3 1 2 3 4 5 6 7 8 1Hz 0 0 0 0 0 0 1 1 5Hz 1 0 0 0 0 1 1 1 10Hz 1 1...

Страница 10: ...ff frequency of 50 Hz setting is illustrated below Note SW4 6 must be ON and SW4 7 must be OFF Table 3 5 SW3 1 2 3 4 5 6 7 8 50Hz 1 1 1 1 1 1 1 1 SW3 trrrrrrrrt Output Current Mode and Input Filter Se...

Страница 11: ...3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5...

Страница 12: ...e integrity of the load cell and associated wiring Table 3 8 SW1 1 2 3 4 5 6 7 8 Shunt Cal ON x x x x x x x 1 Shunt Cal OFF x x x x x x x 0 The 120k resistor can be taken out of circuit and replaced b...

Страница 13: ...with Potentiometer P2 The tare must be subtracted therefore the ve Offset switch SW2 2 should be ON The calibrated zero mV reading would be 4 78 mV i e 7 5 of 63 7mV Table 3 10 SW2 1 2 3 4 5 6 7 8 7 5...

Страница 14: ...ired sensitivity in the table and set switches 1 7 of SW1 accordingly Potentiometer P1 provides fine trimming and range overlap to enable the SGA to be calibrated precisely to any given value within i...

Страница 15: ...ed that the SW1 settings are correct for the transducer sensitivity as step 1 above 3 Apply the known high calibration conditions for optimum accuracy this should be at least 75 of full load and note...

Страница 16: ...be in mV V 3 Ensure the Zero and Span switch settings are correct as detailed in Chapter 3 Tables 3 6 3 9 4 Apply the known low calibration conditions and fine adjust P2 5 Apply the known high calibr...

Страница 17: ...see Chapter 3 Table 3 2 j Check Span and Zero settings SW1 and SW2 see Chapter 3 Table 3 6 3 9 2 Low Output This is when an output is present but not of sufficient magnitude to meet the required value...

Страница 18: ...stuck at top or bottom of the scale See paragraphs 1 to 4 if this is the case Ensure you have the calibration set up correctly installed i e mV source and output as required Ensure you are connected t...

Страница 19: ...of our conditions of trading invalidates warranty claims where late payment has occurred Please refer to Customer Repair Service Procedure document contact your supplier for a copy In the unlikely ev...

Страница 20: ...ly can be connected along with a DC supply for additional security Excitation The external application of electrical voltage applied to a transducer for normal operation Fine Adjustment The Zero and S...

Страница 21: ...e in strain gauge output to the level or magnitude of the SGA output Signal Conditioner A circuit module that offsets attenuates amplifies linearizes and or filters the signal for input to an A D conv...

Страница 22: ...instrument See Zero Suppression Zero Suppression The span of the SGA can be offset from zero zero suppressed such that neither limit of the span will be zero For example an SGA which measures a load...

Страница 23: ...ilter cut off Switchable ranges 1 5000 Hz Zero temperature coefficient 2 5mV V 0 002 0 009 C 2 5mV V FR Span temperature coefficient 0 007 0 01 C Linearity 0 03 FR Gain stability 1st 1000 Hours 0 2 FR...

Страница 24: ...please include a note stating name company address phone number and a detailed description of the problem Also please indicate if it is a warranty repair The sender is responsible for shipping charge...

Страница 25: ...0Hz 1 1 1 1 1 1 1 1 100Hz 0 0 0 0 0 0 0 0 500Hz 1 0 0 0 0 1 0 0 1kHz 1 1 0 0 1 1 0 0 5kHz 1 1 1 1 1 1 0 0 1 2 3 4 5 6 7 0 0 0 x x 1 No Filter 0 1 0 x x 1 No Filter 0 1 1 x x 1 No Filter 1 1 1 x x 1 No...

Страница 26: ...0 V 150 mA Excitation Isolated I O100mSec sample rate Set Point Relays 4 to 20 mA Output Programmable via keypad Fieldbus Connectivity In Two Excellent Packages DSC The Digital Strain Card DCell The i...

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