AMP-SG-MH miniature single-channel strain gage amplifier
Miniature single-channel strain gage amplifier with solder terminals, 40.54 × 25.4 × 6.86 mm and 11 g, ± 10 V output, placed on the rotating side before the slip ring.
Miniature single-channel strain gage amplifier with built-in 350 Ω completion resistors for quarter and half bridges, 11 g, ± 10 V output.
A special version of the AMP-SG-MH. Amplifies a quarter or half bridge completed by built-in 350 Ω resistors. Operating temperature: −55 to 125 °C.
- 11 g
- Weight
- 100 to 2000 V/V
- Gain
- ± 10 V
- Output
- −40 to 125 °C
- Operating temperature
- 11 g
- Weight
- 100 to 2000 V/V
- Gain
- ± 10 V
- Output
- −55 to 125 °C
- Operating temperature
- Bridge excitation± 2.5 V or ± 5 V
- Supply voltage± 15 V DC
- Dimensions40.54 × 25.4 × 6.86 mm (body 31.75 mm long)
- Bridge excitation± 2.5 V or ± 5 V
- Supply voltage± 15 V DC
- Dimensions40.54 × 25.4 × 6.86 mm
AMP-SG-MH: one bridge, 11 g, before the slip ring
The AMP-SG-MH is a miniature single-channel strain gage amplifier, designed to amplify the signal before it passes through a slip ring. It holds a low-drift bipolar bridge excitation supply, ± 2.5 V (AMP-SG-MH-5) or ± 5 V (AMP-SG-MH-10), a low-noise differential amplifier and a 100 kΩ or 1 MΩ shunt calibration resistor, switched remotely in either direction. Gain is set from 100 to 2000 V/V, the output reaches ± 10 V and the response is 20 kHz at −3 dB. It runs on ± 15 V DC, measures 40.54 × 25.4 × 6.86 mm with its terminals, weighs 11 g and operates from −40 to 125 °C.
It is bonded with Dow Corning 3145 RTV or held by an optional metal bracket, bolted to a flat surface or fixed to a shaft with a hose clamp. Wires are soldered to its color-coded terminals, as for any electrostatic sensitive device, and a full Wheatstone bridge is required. Shorting the gain terminals gives 2000 V/V, leaving them open 100 V/V, and a resistor sets any gain between; the shunt terminals work the same way. A PS Series unit such as the PS-DC supplies ± 15 V, turns the excitation off and applies the shunt calibration.
It is meant for applications where signal conditioning is needed and space is limited, with the amplifier close to the gage on the rotating side of a slip ring.
AMP-SG-MH-BC: strain gage amplifier with bridge completion
The AMP-SG-MH-BC has 350 Ω bridge completion resistors built in, for quarter-bridge and half-bridge measurements. It is a miniature single-channel strain gage amplifier with a low-drift bipolar excitation supply, ± 2.5 V (AMP-SG-MH-BC-5) or ± 5 V (AMP-SG-MH-BC-10), and a 100 kΩ or 1 MΩ shunt calibration resistor, switched remotely in either direction. Gain is 100 to 2000 V/V, the output reaches ± 10 V and the response is 20 kHz at −3 dB. It runs on ± 15 V DC, measures 40.54 × 25.4 × 6.86 mm, weighs 11 g and operates from −55 to 125 °C.
Wires are soldered to the color-coded terminals, as for any electrostatic sensitive device. The amplifier is bonded with Dow Corning 3145 RTV or held by an optional metal bracket, bolted to a flat surface or fixed to a shaft with a hose clamp. Shorting the white/blue terminals gives 2000 V/V and leaving them open 100 V/V, and a resistor sets any gain between; shorting the brown terminals gives a 100 kΩ shunt and leaving them open 1 MΩ. A PS Series unit supplies ± 15 V, turns the excitation off and applies the shunt calibration.
A quarter bridge is wired in a three-wire hookup to the completion terminal, a half bridge to the bridge signal low terminal; the amplifier needs a complete bridge to regulate the excitation. Reversing the ± 15 V supplies switches the excitation off, which shows the amplifier's own offset, its noise floor and the magnetic contribution to the signal.
Specifications
| Channels | 1 |
|---|---|
| Input | Strain gage bridge (full bridge) |
| Output | Analog voltage |
| Output range | −10 to 10 V |
| Bandwidth | 20 kHz (−3 dB, gain 100 and 1000) |
| Noise, referred to input | ≤ 0.7 µV (p-p, 0.01 to 10 Hz) |
| Gain | 100 to 2 000 V/V (100 or 2000 by jumper, any value between by external resistor) |
| Gain setting | Jumper · External resistor |
| Shunt calibration | Positive · Negative · Remote |
| Shunt resistor | 100 · 1 000 kΩ (internal; 100 kΩ to 1 MΩ external) |
| Gain accuracy | ≤ 0.5 % (typical: 0.05 % at gain 100, 0.50 % at gain 1000) |
| Gain temperature coefficient | ≤ 0.0025 %/°C |
| Input offset | ≤ 50 µV (10 µV typical) |
| Offset drift | ≤ 0.1 µV/°C (typical; 0.1 µV/month) |
| CMRR | 160 dB |
| Slew rate | 4 V/µs |
| Settling time | 9 µs (gain 100) |
| Shunt accuracy | ≤ 0.1 % |
| Supply voltage | 15 V (dual supply, ± 15 V DC) |
| Excitation voltage | 5 to 10 V (± 2.5 V on AMP-SG-MH-5, ± 5 V on AMP-SG-MH-10, bipolar DC constant voltage; remote on/off) |
| Supply current | 15 mA (per rail, plus bridge load; + 15 mA during shunt calibration) |
| Excitation current limit | 42 mA (84 mA on AMP-SG-MH-10) |
| Max capacitive load | 1 000 pF |
| Excitation accuracy | ≤ 0.4 % |
| Excitation temperature coefficient | ≤ 0.0005 %/°C |
| Dimensions | 40.54 × 25.4 × 6.86 mm (body 31.75 mm long) |
| Weight | 11 g |
| Operating temperature | −40 to 125 °C |
| Compensated temperature | −40 to 85 °C |
| Connections | Solder terminals (2.54 mm pitch) |
| Channels | 1 |
|---|---|
| Input | Strain gage bridge (quarter or half bridge with the built-in completion resistors) |
| Output | Analog voltage |
| Output range | −10 to 10 V |
| Bandwidth | 20 kHz (−3 dB, gain 100 and 1000) |
| Noise, referred to input | ≤ 0.7 µV (p-p, 0.01 to 10 Hz) |
| Gain | 100 to 2 000 V/V (100 or 2000 by jumper, any value between by external resistor) |
| Gain setting | Jumper · External resistor |
| Shunt calibration | Positive · Negative · Remote |
| Shunt resistor | 100 · 1 000 kΩ (internal; 100 kΩ to 1 MΩ external) |
| Gain accuracy | ≤ 0.5 % (typical: 0.05 % at gain 100, 0.50 % at gain 1000) |
| Gain temperature coefficient | ≤ 0.0025 %/°C |
| Input offset | ≤ 50 µV (10 µV typical) |
| Offset drift | ≤ 0.1 µV/°C (typical, µV/°C; 1.0 µV/month) |
| CMRR | 160 dB |
| Slew rate | 4 V/µs |
| Settling time | 9 µs (gain 100) |
| Shunt accuracy | ≤ 0.1 % |
| Supply voltage | 15 V (dual supply, ± 15 V DC) |
| Excitation voltage | 5 to 10 V (± 2.5 V on AMP-SG-MH-BC-5, ± 5 V on AMP-SG-MH-BC-10, bipolar DC constant voltage; remote on/off) |
| Supply current | 15 mA (per rail, plus bridge load; ± 30 mA during shunt calibration) |
| Excitation current limit | 42 mA (84 mA on AMP-SG-MH-BC-10) |
| Max capacitive load | 1 000 pF |
| Excitation accuracy | ≤ 0.4 % |
| Excitation temperature coefficient | ≤ 0.0005 %/°C |
| Dimensions | 40.54 × 25.4 × 6.86 mm |
| Weight | 11 g |
| Operating temperature | −55 to 125 °C |
| Compensated temperature | −25 to 85 °C |
| Connections | Solder terminals |
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Resources
Datasheets and manuals
CAD models
None for AMP-SG-MH.
Guides and notes
Datasheets and manuals
Drawings
None for AMP-SG-MH-BC.
CAD models
None for AMP-SG-MH-BC.
Special versions
- Built-in bridge completion resistors Amplifies a quarter or half bridge completed by built-in 350 Ω resistors. Operating temperature: −55 to 125 °C.
- AMP-SG-MH-BCFor: quarter-bridge and half-bridge measurements, with 350 Ω completion resistors built in.
In the same family
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