2120B资料

2120B

Vishay Micro-Measurements

Strain Gage Signal Conditioner/Amplifier

FEATURES

•Accepts full, half or quarter bridges; all bridge-completion gages built in, including 120/1000 and 350Ωdummies

•Fully adjustable and regulated bridge excitation on eachchannel up to 12Vdc by front panel control

•Continuosly variable amplifier gain up to 2100 by front-panel control

•Separate bridge-power switch

•Output 10Vdc at 100mA, short-circuit; proof and currentlimiting standard

•LED null indicators provided on each channel toindicate amplifier and bridge-balance condition•High stability with temperature and time•Frequency response up to 50kHz

2120B REAR VIEW

DESCRIPTION

A two-channel plug-in amplifier module that includes bridgecompletion, bridge balance, amplifier balance, bridge-exci-tation regulator and shunt calibration.

SPECIFICATIONS

These specifications apply for each of two independentchannels per module.Inputs:Quarter (120Ω/1000Ω and 350Ω), half and full bridge(50-1000Ω). Quarter-bridge dummy gages provided.Bridge Excitation:0.5 to 12 Vdc (adjustable for each channel)with 120Ω full-bridge load.Short-circuit current: <40 mA.Ripple, noise, and 10% line change: ±2 mV max.Load regulation: ±0.2% no-load to 120Ω load (10% linechange).Bridge Balance: ±2000µε (quarter, half, or 350Ω fullbridge), range can be changed by internal jumper to±4000µε or ±6000µε.Calibration:Two-position (center off)toggle switch.Standard factory-installed resistors (±0.1%) simulate±1000µε at GF=2.AmpGain:1 to 2100 continuously adjustable ±1%.Bandpass:DC to 5 kHz (min): –0.5 dB (–5%).DC to 15 kHz: –3 dB.Can be extended by internal jumper to:DC to 17 kHz: –0.5 dB; DC to 50 kHz: –3 dB.Amp Input:Temperature Coefficient of Zero:±1µV/°C RTI (referred to input), ±210µV/°C RTO(referred to output); –10° to +60°C (after 30 minutewarm-up).Noise RTI: (350Ω source impedance)1µV p-p at 0.1 Hz to 10 Hz; 2µV p-p at 0.1 Hz to 100 Hz;2µV at 0.1 Hz to 50 kHz.Noise RTO:50µV p-p at 0.1 Hz to 10 Hz; 80µV p-p at 0.1 Hz to100 Hz; 100µV at 0.1 Hz to 15 kHz; 200µV at0.1 Hz to 50 kHz.Input Impedance: >100MΩ (balance limit resistordisconnected).Common-Mode Rejection: (dc to 60 Hz).Gain MultiplierCMR (dB)X267X2087X200100Source Current: ±10 nA typical; ±40 nA max.Output:±10V (min) at ±100 mA.Current Limit: 140 mA.Optional Feature:May be ordered with, or be field upgraded for, remote-operation relays for control of shunt calibration and bridgeexcitation (off). Requires remote-operation capability in theModel 2150 or 2160. Contact Vishay Micro-Measurementsfor details.Size: 5.25 H x 2.94 W x 10.97 D in (133 x 75 x 279 mm).Weight: 2.2 lb (1.0 kg).All Specifications are nominal or typical at + 23°C unlessnoted.micro-measurements@vishay.com

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Document Number: 11251Revision 21-Nov-03