Brands
Vishay Measurements Group
Interactive Guide
Instruments
2300 System
Model 2310
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Signal Conditioning Amplifier |
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Description
While the Model 2311 provides wider frequency response and more versatile excitation, both 2310 and 2311 Signal Conditioner/Amplifier Modules accept inputs from strain gages, load/pressure/dc displacement transducers, potentiometers, RTD's and nickel temperature sensors, without any internal modification. Controls on the 2310 are arranged in sections, permitting easy setup. Clearly marked push-button and single-purpose switches minimize the possibility of operator error during use. With the exception of the playback switch, all operational and monitor controls are on the front panel. Switches for selecting remote sense and specific shunt calibration configurations are located on the printed circuit board inside the unit.
Specifications All specifications nominal or typical at +23 deg C unless noted. Input Strain Gages: Quarter(120 ohms or1000 ohms and 350 ohms), half or full bridge (50 to 1000 ohms). Dummy resistors installed. Transducers: Foil or piezoresistive strain gage types. Potentiometer. DCDT displacement transducer. Excitation 12 settings: 0.5, 0.7, 1, 1.4, 2, 2.7, 3.5, 5, 7, 10, 12 and 15 Vdc + 1%, max. Current: 0-100 mA, limited at 175 mA, max. Regulation (0-100 mA, + 10% line change): + 0.5 mV + 0.04%, max measured at remote sense point. (Local sense: -5 mV, typical, at 100 mA, measured at plug.) Remote Sense Error: 0.0005%/ohms of lead resistance (350 ohm load). Noise and Ripple: 0.05% p-p, max (dc to 10 kHz). Stability: 0.02%/deg C. Level: Normally symmetrical about ground; either side can be grounded with no effect on performance. Bridge Balance: Method: Counter-emf injection at preamp; automatic electronic; dual range; can be disabled on front panel. Ranges (auto ranging): + 5000 microstrain (1% bridge unbalance or 2.5 mV/V), resolution 2.5 microstrain (0.0012 mV/V). + 25 000 microstrain (5% bridge unbalance or 12.5 mV/V), resolution 12.5 microstrain (0.006 mV/V). Balance Time: 2 seconds, typical. Manual Vernier Balance: + 50 microstrain ( + 0.025 mV/V). Interaction: Essentially independent of excitation and amplifier gain. Storage: Digital; up to 2 years without line power. Shunt Calibration: Circuit (2-level, dual polarity): Single-shunt (for stress analysis) across any bridge arm, including dummy gage. Double-shunt (for transducer) across opposite bridge arms. Provision for 4 dedicated leads to shunt external arms. Cal circuit selected by switches on PC board. Standard Factory-Installed Resistors ( + 0.1%) Simulate: + 200 and + 1000 microstrain at GF=2 across dummy half bridge; +1000 microstrain at GF=2 across dummy gage (120 and 350 ohm); + 1 mV/V (double-shunt) for 350 ohm transducer. Remote-Operation Relays (Option Y): 4 relays (plus remote-reset relay for bridge balance and relay for excitation on/off). Each requires 10 mA at 5 Vdc, except excitation on/off 25 mA. Amplifier: Gain: 1 to 11 000 continuously variable. Direct-reading. + 1% max of reading; + 0.5% max of full scale vernier setting. Ten-turn counting knob (X1 to X11) plus decade multiplier (X1 to X1000). Frequency Response (all gains >5, full output): dc coupled: dc to 25 kHz, -0.5 dB max. dc to 65 kHz, -3 dB (typical at 40% output). ac coupled: 5 Hz to 25 kHz, -0.5 dB. Input Impedance: 100 megohms, min, differential or common-mode, including bridge balance circuit. Bias Current: + 50 nA, typical each input. Source Impedance: 0 to 1000 ohms each input. Common-Mode Voltage: + 10V. Common-Mode Rejection (gain over X100): Shorted input: 100 dB, min, at dc; 90 dB, min, dc to 1 kHz. 350 ohms balanced input: 90 dB, typical, at 1 kHz. Stability (gain over X100): + 2 microvolts/deg C, max, referred to input (RTI). Noise (gain over X100, all outputs): 0.01 to 10 Hz: 1 microvolt p-p RTI. 0.5 Hz to 125 kHz: 5 microvolts rms, max, RTI. Filter: Characteristic: Low-pass active 2-pole Butterworth standard. Frequencies (-3 + 1 dB): 10, 100, 1000 and 10 000 Hz and wide-band. Outputs Filtered: Any 1 or 2 or all (switch-selected on PC board). NOTE: Consult Applications Engineering Department concerning optional filter characteristics and frequencies. Amplifier Outputs: Standard Output: + 10V at 5 mA, min. Tape Output: + 1.414V (1 Vrms) at 5 mA, min. Galvanometer Output: + 10V at 75 mA, min, current-limited at 100 mA, max (minimum load resistance for 0.05% linearity: 50 ohms). Galvanometer attenuator (0-100%) and zero adjust ( + 1V) on front panel. Linearity at dc: 0.02%. Any output can be short-circuited with no effect on others. Playback: Input: + 1.414V full scale; input impedance 20 kilohms. Gain: X1 to tape output; X7.07 to standard output. Filter Selection: As specified above. Outputs: All three as specified above. Power: 105 to 125V or 210 to 250V (switch-selected), 50/60 Hz, 10 watts, max. Keep-Alive Supply (for bridge balance): 2 Eveready S76E or equal. Shelf-life (approx. 2 years). Size & Weight: Panel: 8.75 H x 1.71 W in (222 x 43.3 mm). Case Depth Behind Panel: 15.9 in (404 mm). Weight: 6 lb (2.7 kg). 
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