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LOAD CELL AMPLIFIER SIGNAL CONDITIONER WITH REMOVABLE TERMINALS

Made in the USA

MODEL LCA-RTC

The LCA-RTC Module provide low-cost, dedicated signal conditioning for a single bridge type load cell or torque sensor. Model LCA-RTC comes with removable screw-clamp terminal connectors, which accept wires without soldering. On- board jumper selections include sensitivities from 0.5 mV/V to 10 mV/V, bandwidths from 100 Hz to 30 kHz, and amplified outputs of 0 to ±5V, 0 to ±10V, 0-16 mA, 0-20 mA or 4-20 mA. Zero and span adjustments are via precision 25-turn low-tempco metal film potentiometers. The units can be operated next to the sensor with 4-wire hookup or at distances up to 1 km (3300 feet) with 6-wire hookup. An onboard 87.325 kΩ resistor allows easy shunt calibration at the push of a button. Provision is also made for a user-furnished calibration resistor. Power requirements are 11.8 to 26V DC with load currents from 10 to 60 mA, the latter applying when the unit provides 10V DC excitation to a 350 ohm load cell and delivers a 20 mA analog output.

LCA-RTC load cell amplifier signal conditioner
FEATURES
  • Power Requirement 12 to 26V DC
  • Bridge Excitation 5 to 10V DC
  • Bridge Sensitivity 0.5 mV/V to 10 mV/V
  • Push Button Shunt Calibration Network
  • Two-Pole Low Pass Selectable Filter 100 HZ to 30 kHZ
  • Analog Outputs 0 to ±5V, 0 to ±10V, 0-16 mA,
    0-20 mA or 4-20 mA
Price
LCA-RTC N/A $325.00
Accessories
APD-12VDC N/A $40.00
ATB-1 N/A $40.00
ATP-T N/A $9.00
ADR-KIT N/A $40.00
Specifications
Signal Input
Voltage Range
±2.5 mV min to 100 mV max
Voltage Sensitivity
0 to 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0 or 10 mV/V
(jumper selectable)
Polarity Reversal
Jumper selectable
Offset Voltage
±10 µV typ, ±30 µV max
Offset Voltage Tempco
±0.04 µV/°C typ, ±1.2 µV/°C max
Power Supply Rejection
±0.1 µV/V typ, ±0.3 µV/V max
Offset Voltage Aging
±2 µV/1000h typ, ±6 µV/1000h max
Bias Current
±0.3 nA typ, ±2.8 nA max
Voltage Noise
350 nVpp or 56 nVrms typ (0.1 to 10 Hz)
Voltage Noise Density
12.4 nV/vHz typ at 1kHz
Differential Resistance
1 GΩ min
Common Mode Resistance
100 GΩ typ
Common Mode Voltage
-5.5V to +5.5V DC
Signal Output
Amplifier Type
Differential, bipolar
Voltage Ranges
0 to ±5V, 0 to ±10V (jumper selectable)
Voltage Load
5 kΩ min
Gain Range
50 to 4000
Noise and Ripple
See chart on page 12.
Current Source
0-16 mA, 0-20 mA or 4-20 mA (jumper selectable)
Current Load
0-500Ω (10V compliance)
Nonlinearity
±0.005% of FS max
Zero Adjust
±10% of FS min
Zero Tempco
±0.003%/°C of FS max
Span Adjust
±24% of FS min
Span Tempco
±0.003%/°C of FS max
Filter Configuration
Two-pole low pass (jumper selectable)
Filter Frequency Response
DC to 0.1, 0.3, 1.0k, 3.0, 10 kHz (-6 dB points)
Excitation Output
Voltage Output
5 or 10V DC ±2%
Load Current
0-30 mA
Load Resistance
350Ω min
Voltage Tempco
±0.005%/°C max
Load Cell Connection
4 or 6 wires (jumper selectable)
Compensation for changes
0.0025% of span max / 1Ω (sum of + and - excitation in lead resistance.
Lead resistance changes with 6-wire connection to 350Ω load cell)
Power Requirement
Module Voltage
11.8V to 26V DC
Protection for Reverse Polarity
- 40V DC
Current
40 mA with 350Ω LC at 10V exc and no load on Vo
60 mA with 350Ω LC at 10V exc and 20 mA out on Io
AC Adapter Ratings
120V AC, 60 Hz input; 12V DC, 200 mA output
AC Adapter Safety
UL and CSA safety certifications
Calibration
Standard Shunt Cal Resistor
87.325 kΩ ±0.025% selectable via push-button switch
Custom Shunt Cal Resistor
Sockets for leads of user furnished cal resistor
General
Operating Temperature
0 to 55°C for full specs, - 40 to +70°C, non-condensing, with derated specs
Case Material
ABS 94HB thermoplastic polymer
Dimensions, Plastic Case
2.7” x 1.7” x 0.8”, 70 x 43 x 20 mm, L x W x H
Dimensions with DB9
3.1” x 1.7” x 0.8”, 78 x 43 x 20 mm, L x W x H
For length, make allowance for user furnished DB9 mating connectors.
Dimensions with Plugs
3.5” x 1.7” x 0.8”, 90 x 43 x 20 mm, L x W x H
For length, add 10 mm (0.4”) on each side for furnished cable connectors.
Weight
1.4 oz (40g) for LCA-9PC, 1.6 oz (45g) for LCA-RTC
Provision for DIN rail mounting
Accessory DIN rail mount, P/N ADR-KIT
Voltage & Current Noise Output, Peak to Peak, Typical
mV/V Gain* Bandwidth (-6 db)
0.1 kHz 0.3 kHz 1.0 kHz 3.0 kHz 10 kHz
mV µA mV µA mV µA mV µA mV µA
0.5 2000 8 70 10 70 12 70 15 80 20 80
1.0 1000 6 70 7 70 8 70 10 70 12 70
1.5 667 6 70 7 70 8 70 10 70 12 70
2.0 500 6 70 7 70 8 70 10 70 12 70
2.5 400 6 70 7 70 8 70 10 70 12 70
3.0 333 6 70 7 70 8 70 10 70 12 70
4.0 250 6 70 7 70 8 70 10 70 12 70
10 100 6 70 7 70 8 70 10 70 12 70
* Gain is for 10V excitation and 0-10V voltage output
Price
LCA-RTC N/A $325.00
Accessories
APD-12VDC N/A $40.00
ATB-1 N/A $40.00
ATP-T N/A $9.00
ADR-KIT N/A $40.00