Related Manuals for Mantracourt SGA/A
Summary of Contents for Mantracourt SGA/A
- Page 1 SGA/A & SGA/D Strain Gauge / Load Cell Amplifier / Signal Conditioner Issue 7 PCB onwards User Manual www.mantracourt.co.uk...
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Page 2: Table Of Contents
Figure 4.1 Calibration Connections using Millivolt Source................ 15 Chapter 5 Troubleshooting ......................16 Chapter 6 Product Care .......................18 Chapter 7 Glossary ........................19 Chapter 8 Specifications for SGA/A & SGA/D Load Cell Amplifiers............22 CE Approvals..........................23 Warranty ..........................23 Figure 8.1 Connection Details ......................24 Other Mantracourt Products......................25... -
Page 3: Chapter 1 Introduction To Sga/A & Sga/D
18-24V DC 0-20mA 4-20mA Offered in two versions, the SGA/A for 110/230V AC or 18-24V DC operation and the 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 potentiometer. -
Page 4: Chapter 2 Installing The Sga/A & Sga/D
See Specification details in Chapter 8 for details of Environmental Approvals. Carefully remove the SGA/A unit from its packing. Check that the unit is complete and undamaged. The SGA/A & SGA/D units can operated in any industrial environment providing the following limits are not exceeded Operating Temperature -10 ºC to +50 ºC... -
Page 5: Cabling
Figure 2.2 above. (This diagram is also provided inside the lid). Connections to the SGA/A & SGA/D input/output signal and the power supply are made via 2.5mm² field terminal connectors. Cable entry in the cased versions is via glands in the ends of the case. -
Page 6: Figure 2.3 Input (Sensor) Connections
Do not run signal cables parallel to power cables. Cross such cables at right angles. The ground connection conductor should have sufficient cross-sectional area to ensure a low impedance path to attenuate RF interference. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 7: Output Connections
‘- Excitation’ terminal. Select this option by fitting the two jumpers, JP1 and JP2 to the ‘inside’ positions (See Figure 3.2) See Chapter 3 for switch settings and details of SINK & SOURCE jumpers. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 8: Chapter 3 Switch Settings
Low pass filtering is switched into operation by setting SW4/6 ‘ON’↑ and SW4/7 ‘OFF’↓. Reverse these settings to bypass the filter. It should be noted that either one of these switches MUST be on but not BOTH Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 9: Output Filter Settings -Switch 3
Low pass filtering is switched into operation by setting SW4/6 ‘ON’↑ and SW4/7 ‘OFF’↓. Reverse these settings to bypass the filter. It should be noted that either one of these switches MUST be on but not BOTH Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 10: Output Current Mode And Input Filter Settings - Jumpers Jp1, Jp2 & Jp3
↑ ↑ ↑ t r rrrrrrrt 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. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 11: Span (Gain) Setting Switch Sw1
When using 5V Excitation (SW4 switch 8 = OFF), divide the transducer's mV/V output by two and set SW1 to the nearest setting shown in table 3.6 above e.g. for 2.5mV/V with 5V excitation choose the 1.2mV/V setting Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 12: Shunt Calibration Switch Sw1/8
This offset can be used to compensate for the transducer zero error, to tare the scale dead load or to shift the output. These settings allow the user to calibrate a zero offset. The range allows for up to 79% of the span. Potentiometer P2 provides fine adjustment. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 13: Table 3.9
'OFF '. Switch settings 3 to 8 are ADDITIVE. The offset value of each switch is added to give a total offset of 78%. Fine adjustment is provided by potentiometer P2. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 14: Chapter 4 Calibration
Chapter 4 Calibration The SGA/A & SGA/D provides the excitation supply and signal conditioning to cater for a wide range of strain gauges, load cells, pressure transducers or torque transducers. Output Select the analogue output range as detailed in Chapter 3, Figure 3.1,Table 3.1 & 3.2 by means of SW4. - Page 15 The SGA/A & SGA/D can be calibrated with the transducer connected, provided that two calibration points can be implemented. e.g. by applying known weights or forces. If this is not possible, a stable mV source or load cell simulator can be used provided that the precise sensitivity (mV/V) and full range output (kg) of the transducer is known.
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Page 16: Figure 4.1 Calibration Connections Using Millivolt Source
If this is the case, note the reading, e.g. 0.5V, apply the high calibration conditions and trim P1 for the required change in output, i.e. Trim the output for 0.5 + 7.5 = 8V. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 17: Chapter 5 Troubleshooting
Refer to tutorial on the calibration set-up f) Check the calibration. Incorrect setting of the calibration span switches is the most common cause of high output - particularly when associated with ± Voltage outputs. Mantracourt Electronics Limited SGA/A & SGA/D User Manual... - Page 18 If the potentiometer does not alter the output the unit must be repaired – remove from service. It is always wise to check a known good SGA against the problem installation before rejecting the suspect SGA. Mantracourt Electronics Limited SGA/A & SGA/D User Manual...
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Page 19: Chapter 6 Product Care
A worn out component, excessive use in harsh environments, an overly zealous operator; regrettably some circumstances necessitate repair. At Mantracourt Electronics Ltd we can't guarantee that a product will never require repairing. We can, however, promise a repair service of exceptional quality, one which is governed by a rigorous procedure. -
Page 20: Chapter 7 Glossary
Dual Power supply The SGA/A can have a Dual Power Supply. An AC supply 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. - Page 21 Temperature transducers). Zero Zero is otherwise identified as Offset. It relates to the proportional output to the sensor input. Calibration of the SGA is determined by setting the Span (Gain) and Zero (Offset). Mantracourt Electronics Limited SGA/A & SGA/D User Manual...
- Page 22 100kg span from 400kg to 500kg° is said to have 400kG zero suppression. Alternating Current Direct Current Hertz (Frequency) IP66 UK Environmental Specification kilohertz (Frequency) milliamps millimetres NEMA 4X US Environmental Specification Signal Conditioner Strain Gauge Amplifier Volts millivolts Mantracourt Electronics Limited SGA/A & SGA/D User Manual...
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Page 23: Chapter 8 Specifications For Sga/A & Sga/D Load Cell Amplifiers
Chapter 8 Specifications for SGA/A & SGA/D Load Cell Amplifiers Parameter Typical Units Power supply (SGA/A):- (110/230Vac) 50 - 60Hz 110/230 V AC Power supply dc: - V DC (See note1) Power supply current dc: - (depends on loading) Bridge excitation (10V range) 9.75... -
Page 24: Ce Approvals
(3) three years from the date of dispatch. If the 'Mantracourt' product you purchase appears to have a defect in material or workmanship or fails during normal use within the period, please contact your Distributor, who will assist you in resolving the problem. If it is necessary to return the product to 'Mantracourt' please include a note stating name, company, address, phone number and a detailed description of the problem. -
Page 25: Figure 8.1 Connection Details
Figure 8.1 Connection Details Mantracourt Electronics Limited SGA/A & SGA/D User Manual... -
Page 26: Other Mantracourt Products
Elimination induced noise on signals ISO 9001 REGISTERED FIRM In the interests of continued product development, Mantracourt Electronics Limited reserves the right to alter product specifications without prior notice. DESIGNED & MANUFACTURED IN THE UK Code No. 517-150 Issue 2.8 01.09.10...
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