Models SR-100FR and SR-200RFR from Columbia Angular Accelerometers have been developed specifically for low-level near DC applications.
Such sensors tend to incorporate the fluid rotor idea to offer extremely high sensitivity and complete scale ranges as low as +/–0.01 radians/second2. The high-performance torquer design holds reliability and ruggedness in extreme vibration and shock surroundings.
The Model SR-100FR functions from a +/–15 V power source and consists of an output span of +/–5 volts for full-scale input. The Model SR-200RFR features the same sensor system as the SR-100FR but offers electronics that function from a +24 to +32 volt aircraft supply and supplies 0 to 5 V output.
Both units are entirely self-contained and need no extra amplification or conditioning. Applications for such high sensitivity accelerometers consist of rotational studies or stabilization of structures, antennas, chips and platforms.
- High sensitivity
- High-performance fluid rotor design
Image Credit: Columbia Research Laboratories
Specifications
Table 1. Source: Columbia Research Laboratories
| Operational |
SR-100FR |
SR-200RFR |
| Ranges Available |
±0.1 To ±5 Rad / Sec2 |
| Output Voltage |
±5 Volts
into 100 K Load |
0.2 To 4.8 VDC
into 100 K Load |
| Excitation |
±15 VDC
<20 mA |
+24 To +32 VDC
<30 mA |
| Output Impedance |
5,000 Ohms Typical |
| Sensitive Axis Alignment |
0.5 Deg |
| Scale Factor Tolerance |
±1% |
| Scale Factor Temp Coefficient |
0.054% / Deg C |
0.07% / Deg C |
| Zero Bias |
2 mRad / Sec2 Max. |
2.5 ±0.01 VDC |
| Null Temp Sensitivity |
45 µRad / Sec2/Deg C |
60 µRad / Sec2/Deg C |
| Natural Frequency |
10 Hz Min. |
| Damping Ratio |
0.6 To 1 |
| Linear Acceleration Sensitivity |
10 mRad / Sec2 / G |
| Cross Axis Sensitivity |
<0.5% |
| Output Noise |
2 mRad / Sec2 RMS |
| Non-Linearity |
±0.1% F.R. |
| Hysteresis & Non-Repeatability |
±0.1% F.R. ±0.2% F.R. |
| Threshold & Resolution |
0.001% F.R. |
| Environmental |
SR-100FR |
SR-200RFR |
| Temperature, Operating |
-40 To +71 Deg C |
| Temperature, Storage |
-40 To +71 Deg C |
Vibration Survival
(2 To 2,000 Hz) |
10 G RMS,
0.5” Disp D.A. |
| Linear Acceleration Survival |
100 G |
| Shock Survival |
100 G, 11 mSec |
| Ambient Pressure |
0 To 5 Atmospheres |
| Humidity |
95% R.H. |
| Physical |
SR-100FR |
SR-200RFR |
| Weight |
3.5 Lbs. Max (1.58 KG) |
| Size |
6.56 In. Dia. x 2.375 In. H (16.7 cm Dia. x 6.0 cm H) |
| Case Material |
Anodized Aluminum |
| Sealing |
Environmental |
| Connector |
DT07H-12-8PN or Equiv. |
PTIH-10-6P or Equiv. |
| Optional Mating Connector |
PT06A-12-8S or Equiv. |
PT06A-10-6S or Equiv. |
I/O Connector Pin Functions
SR-100FR
Table 2. Source: Columbia Research Laboratories
| Pin |
Function |
| A |
Sig & Pwr Return |
| B |
Current Output |
| C |
Signal Output |
| D |
Test – |
| E |
-15 VDC |
| F |
+15 VDC |
| G |
Test + |
| H |
Spare |
SR-200RFR
Table 3. Source: Columbia Research Laboratories
| Pin |
Function |
| A |
Sig & Pwr Grd |
| B |
+28V Input |
| C |
Test |
| D |
Eo (Voltage Out) |
| E |
I o (Current Out) |
| F |
I o (Current Ret) |