2120B [VISHAY]

Strain Gage Signal Conditioner/Amplifier; 应变计信号调节器/放大器


型号：	2120B
厂家：	VISHAY
描述：	Strain Gage Signal Conditioner/Amplifier 应变计信号调节器/放大器调节器放大器
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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 350Ω

dummies

• Fully adjustable and regulated bridge excitation on each

channel 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 current

limiting standard

• LED null indicators provided on each channel to

indicate 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 bridge

completion, bridge balance, amplifier balance, bridge-exci-

tation regulator and shunt calibration.

SPECIFICATIONS

Amp Input:

These specifications apply for each of two independent

channels per module.

Temperature Coefficient of Zero:

±1µV/°C RTI (referred to input), ±210µV/°C RTO

(referred to output); –10° to +60°C (after 30 minute

warm-up).

Inputs:

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.

Quarter (120Ω/1000Ω and 350Ω), half and full bridge

(50-1000Ω). Quarter-bridge dummy gages provided.

Noise RTO:

Bridge Excitation:

0.5 to 12 Vdc (adjustable for each channel)

with 120Ω full-bridge load.

50µV p-p at 0.1 Hz to 10 Hz; 80µV p-p at 0.1 Hz to

100 Hz; 100µV at 0.1 Hz to 15 kHz; 200µV at

0.1 Hz to 50 kHz.

Input Impedance: >100MΩ (balance limit resistor

disconnected).

Short-circuit current: <40 mA.

Ripple, noise, and 10% line change: ±2 mV max.

Load regulation: ±0.2% no-load to 120Ω load (10% line

change).

Common-Mode Rejection: (dc to 60 Hz).

Gain Multiplier

CMR (dB)

X20

Bridge Balance: ±2000µε (quarter, half, or 350Ω full

bridge), range can be changed by internal jumper to

±4000µε or ±6000µε.

X200

100

Source Current: ±10 nA typical; ±40 nA max.

Output:

Calibration:

±10V (min) at ±100 mA.

Current Limit: 140 mA.

Two-position (center off) toggle switch.

Standard factory-installed resistors (±0.1%) simulate

±1000µε at GF=2.

Optional Feature:

May be ordered with, or be field upgraded for, remote-

operation relays for control of shunt calibration and bridge

excitation (off). Requires remote-operation capability in the

Model 2150 or 2160. Contact Vishay Micro-Measurements

for details.

Amp Gain:

1 to 2100 continuously adjustable ±1%.

Bandpass:

DC to 5 kHz (min): –0.5 dB (–5%).

DC to 15 kHz: –3 dB.

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).

Can be extended by internal jumper to:

DC to 17 kHz: –0.5 dB; DC to 50 kHz: –3 dB.

All Specifications are nominal or typical at + 23°C unless

noted.

Document Number: 11251

Revision 21-Nov-03

micro-measurements@vishay.com

www.vishaymg.com

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