Precision Force Balance Angular Accelerometers

The two Columbia Models named SR-220RNP and SR-220RNC are precision force balance angular accelerometers that have been specifically developed for applications where space is at a premium. The Columbia patented HP suspension system offers very high-end toughness and outstanding rejection of linear acceleration.

The two designs vary only in their electrical interface. The SR-220RNP offers solder pins and the SR-220RNC integrates a 4-pin connector. Such accelerometers do not rely on rotational inertia or fluid damping but are damped electrically.

This leads to remarkable high-frequency characteristics for an angular accelerometer in its range of sensitivity. The design of the servo loop ensures excellent thermal stability of scale factor, zero biasand frequency characteristics. Users can discuss with the factory for customized versions of such sensors.

Lightweight/Small size

Damping is done electronically

Tough construction

Precision Force Balance Angular Accelerometers

Image Credit: Columbia Research Laboratories

Specifications

Table 1. Source: Columbia Research Laboratories

Operational	SR-220RNP	SR-220RNC
Ranges Available	±100, ±500, ±1000, ±5000 Rad/Sec²
Output Voltage	±5 Volts into 100 K Load
Excitation	±15 VDC <20 mA
Output Impedance	<500 Ohms
Sensitive Axis Alignment	0.5 Deg
Scale Factor Tolerance	±1%
Scale Factor Temp Coefficient	0.05% / Deg C Max.
Zero Bias	±10 mV
Null Temp Sensitivity	±0.1 mV / Deg C
Natural Frequency	50 To 200 Hz Dependent Upon Range
Damping	0.7 ±0.2
Linear Acceleration Sensitivity	0.3% F.R./ G
Cross Axis Sensitivity	±2%
Output Noise(DC To 400 Hz)	<0.02% F.R.
Non-Linearity	±0.01% F.R.
Hysteresis & Non-Repeatability	±0.25% F.R.
Threshold & Resolution	0.005% F.R.

Environmental	SR-220RNP	SR-220RNC
Temperature, Operating	-50 To +85 Deg C
Temperature, Storage	-55 To +95 Deg C
Vibration Survival(2 To 2,000 Hz)	10 G RMS,0.5” Disp D.A.
Linear Acceleration SurvivalRange +100 Rad/Sec²All Other Ranges	100 G150 G
Shock Survival	500 G, 1 mSec
Ambient Pressure	0 To 7 Atmospheres
Humidity	95% R.H.

Physical	SR-220RNP	SR-220RNC
Weight	4 Oz (113 Gms)	4.3 Oz (122 Gms)
Size(Excluding Stud Mount & I/O Termination)	1.35 In. Dia. x 1.75 In. H(3.4 cm Dia. x 4.5 cm H)
Case Material	Stainless Steel
Sealing	Environmental
Connector	Solder Pins	PT1H-8-4P or Equiv.
Optional Mating Connector	N/A	PT06A-8-4S or Equiv.

I/O Pin Functions

Model SR-220RNP

Table 2. Source: Columbia Research Laboratories

Pin	Function
A	+15 VDC
B	Ground
C	-15 VDC
D	Eo (Voltage Out)

Model SR-220RNC

Table 3. Source: Columbia Research Laboratories

Pin	Function
A	Sig & Pwr Grd
B	+15 VDC
C	-15 VDC
D	Signal Output

标签：Laboratory Process Equipment Laboratory Testing & Sample Preparation Equipment

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