Silicon 213P Manual

Optical seismometer

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Silicon Audio Optical Seismometer

Model 213P

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Summary of Contents for Silicon 213P

Page 2: Table Of Contents
213P 08.02.2018 © 2018 Silicon Audio Contents Introduction ................................3 Quick start guide ..............................3 Theory of Operation ...............................3 Instrument response ..............................4 Installation and Handling ............................4 Calibration & Reset .............................5 Tilt ..................................5 Recenter input ..............................5 Coil Calibration Input ............................6 Specs ..................................7 Sensor Response ..............................8 213P-40 ................................8...
Page 3: Introduction
213P 08.02.2018 © 2018 Silicon Audio Introduction The Silicon Audio Optical Seismometer is a low noise force-balanced seismometer offering a flat velocity response from 0.005Hz to 80Hz in a rugged design which is free of mass locking. The post-hole packaging of the sensor is available in water resistant (IP68) enclosure designed for direct burial.
Page 4: Instrument Response
0.7. Installation and Handling The 213P sensor is free of any mass-locking mechanisms. For optimal ruggedness, the sensors should be transported in the powered off state. The posthole package is watertight and designed for direct burial. When unpacking the sensor and getting ready to install the unit, connect the cable after you remove the sensor from the case to minimize contamination of the connector pins.
Page 5: Calibration & Reset
Tilt The 213P has a tilt tolerance of +/-15degrees while the instrument is installed and calibrated. Once in operation, much smaller tilts can cause the instrument to overscale. If the instrument overscales, it will recalibrate for this new tilt. This allows the instrument to recover in situations where there is slow shifting.
Page 6: Coil Calibration Input
You can see the equivalent input circuit in Figure 3: DAS coil input circuit. The nominal coil constant for the sensors is listed with the response. (nominally 58.8 mV/V for 213P- 40s) Figure 3: DAS coil input circuit...
Page 7: Specs
213P 08.02.2018 © 2018 Silicon Audio Specs SENSOR PERFORMANCE 213P 213P-40 0.025 Hz – 90 Hz (-3db / +3db ) Passband (flat to velocity) 213P-120 0.008 Hz – 60 Hz (-3db / +3db ) 0.5ng/√Hz [@ 10Hz] 0.8ng/√Hz [@ 1Hz] Noise 3ng/√Hz [@ 0.1Hz]...
Page 8: Sensor Response
213P 08.02.2018 © 2018 Silicon Audio Sensor Response 213P-40 Response function Sensitivity V/m/s Vout / Vin Coil input sensitivity 0.0588 Normalization factor 1.6369843e+06 Normalization frequency Number of zeroes Number of poles real imag Complex zeroes 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 -5.661140e+02 0.000000e+00...
Page 9 213P 08.02.2018 © 2018 Silicon Audio 213P-120 Response function V/m/s Sensitivity Vout / Vin Coil input sensitivity 0.060 Normalization factor 2.421113E+06 Normalization frequency Number of zeroes Number of poles real imag Complex zeroes 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 -3.826450e+02 0.000000e+00 -4.398220e+03 0.000000e+00...
Page 10: 213P-120
213P 08.02.2018 © 2018 Silicon Audio Sensor Pin-Out The recommended mating connector for the 213P is a Souriau UTS6JC14E19S. Silicon Audio cable 213P Cable color / label Silicon Audio Harting Cable Sensor Function 213P 09456000332 14-19S 6-24 v DC Twisted...