Products : Instrumentation : Amplifiers & Conditioners : SGA Analogue Strain Gauge Amplifier

SGA Analogue Strain Gauge Amplifier

SGA
 

Features

  • Very Stable Bridge Excitation
  • Selectable Sensitivity
  • High Frequency Filtering
  • User Selectable Analogue Outputs
  • High Specification
  • IP65 ABS field case with cable glands
  • Surface mount PCB
  • Wide range filtering 1Hz to 5kHz
  • Switch selectable offset ±70% FS
  • Shunt Calibration facility (120Kohms) Excitation: regulated 10V @110mA

The SGA range of strain gauge amplifiers offers great flexibility. Both the 110/230Vac powered SGA/A and 18-24Vdc powered SGA/D offer 10volt on-board excitation, capable of powering up to four 350ohm strain gauge bridges. Please note that the 110/230Vac version can also be DC powered.

With an input sensitivity range of ±0.06 to ±29 mV/V. Any sensor in this input range can be amplified to give ±10V, ±5V, 0-10V, 0-5V, 0-20mA or 4-20mA outputs.

There is also a wide offset control, using a combination of switches and a potentiometer. This gives an adjustment range of ±70%.

The SGA is an ideal product for many OEM customers, as its flexibility means that it can be configured to suit most applications.

The SGA can be supplied calibrated with any of LCM Systems sensor range or could be integrated within a larger instrumentation system.

Specification

Parameter

  Min Typ Max Units
Power supply (SGA/A):- (110/230Vac) 50 - 60Hz - 110/230 - V AC
Power supply DC :- 18 - 24* V DC
Power supply current DC :- (depends on loading ) 50 90 200 mA
Bridge excitation 350R Bridge 9.5 10 10.5 VDC
Bridge resistance 85 - - Ohms
Bridge sensitivity (Switchable) 0.06 2.5 29 mV/V
Gain adjustment (Pot - fine adjustment.) 0.06 - 1.0 mV/V
Offset adjustment (Pot - fine adustment.) -1.25 - +1.25 %FR
Offset adjustment (Switchable - coarse adjustment) ±1.25 - ±79 %F
Output load (Voltage output) - - 2 mA
Output load (Current output) 0 - 500 Ohms
Bandwidth (No filter and > 2mV/V) -3dB point DC - 6 kHz
Filter cut-off (Switchable ranges) -3dB point 1 - 5000 Hz
Zero temperature coefficient (@2.5mV/V) - 0.002 0.009 %/ºC@2.5mV/V
Span temperature coefficient - 0.007 0.01 %°C
Linearity - 0.03 - %FR
Gain stability -1st 1000 Hours - 0.2 - %FR
Gain stability - 2nd 1000 Hours - 0.1 - %FR
90 day Offset stability - 3.3 - uV
Output load stability gain (0 - 100%) - - 0.01 %FR
Output load stability offset (0 - 100%) - - 0.01 %FR
Power supply rejection gain (0 - 100%) - - 0.01 %FR
Power supply rejection offset (0 - 100%) - - 0.01 %FR
Operating temperature range - 20 - 50 °C
Storage temperature range -40 - 70 °C
Humidity - - 95 %
*N.B. 18V max at full load FR= Full Range
Output options set by on board switch ±10V, ±5V, 0-10V, 0-5V, 0-20mA, 4-20mA
Connections Field screw terminals - 2.5mm² rising clamp
Enclosure ABS case 160 x 80 x 55sealed to IP65 fitted with 3off cable glands
Controls Gain pot Offset pot
Coarse gain switches
Coarse offset switches
Filter cut-off switches
Output mode switch

CE & Environmental

Storage temperature -20 to +70ºC
Operating temperature -10 to 50°C
Relative humidity 95% maximum non condensing
Safety/Low Voltage Directive 2006/95/EC
EMC Directive 2004/108/EC

Dimensions

sga dimensions

Downloads

Click here to download - SGA Datasheet

Click here to download - SGA Instruction Manual

Suggested Instrumentation

Listed below are some of the other Instruments in our range that can interfaced with any of the SGA range of products:

ADP15 Panel Mounting Process Input Digital Indicator/Controller

ADP15-DI Dual Input Panel Mounting Digital Indicator/Controller

Options

There are currently no options available to view from this page. To view the various input and output options available for the SGA, please view the SGA product datasheet by clicking here.

Applications

  • Force measurement systems
  • Interface sensors to chart recorders
  • Simple weighing systems
  • Conversion of load cell signals for long cable run applications
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Unit 15, Newport Business Park, Barry Way, Newport Isle of Wight, PO30 5GY United Kingdom VAT no (GB 785 3956 71) and Co. Reg (2057541).

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