MAN-040-0001 Güralp 40T User's Guide

Chapter 7. Specifications

In the interests of continual improvement with respect to design, reliability, function or otherwise, all product specifications and data are subject to change without prior notice.

SYSTEM	Technology	Force feedback velocity sensor
SYSTEM	Configuration / Topology	Triaxial orthogonal (ZNE)
PERFORMANCE	Velocity output band (flat response within -3 dB crossing points)	60 s (0.017 Hz) to 100 Hz standard 30 s or 1 s to 100 Hz options available Contact Güralp for other options
	Output sensitivity	2000 V/msˉ¹ (2 × 1000 V/msˉ¹) differential standard output (full-scale clip level of 8.8 mm/s) Contact Güralp to discuss alternative high sensitivity (high gain) options
	Peak full-scale output voltage	Differential: ±20 V (40 V peak-to-peak) Single-ended (e.g. mass positions): ±10 V (20 V peak-to-peak)
	Self noise below NLNM (New Low Noise Model; Peterson, 1993, USGS)	7 s (0.15 Hz) to 4 Hz Independently tested value - see Tasic & Runovc (2012), Journal of Seismology
	Sensor dynamic range (standard sensitivity)	148 dB @ 1 Hz 151 dB @ 5 Hz
	Cross axis rejection	65 dB
	Linearity	>90 dB
	Lowest spurious resonance	450 Hz
	Damping	70.7% of critical
	Operating tilt range	±2.5°
MASS MONITORING / CONTROL	Sensor Mass positions	Three independent sensor mass position outputs (single-ended)
	Mass locking	No mass locking required
	Mass centring / offset nulling	Manually adjustable via pots located under lid. Remote options available.
CALIBRATION	Calibration input	Independent signal and enable lines exposed on sensor connector
CONNECTOR	Single connector: Analogue outputs, power input and control inputs	26-pin military-specification bayonet connector. Post-hole option: 100 bar/10 MPa waterproof connector
POWER	Power supply voltage	10–36 V DC *
POWER	Power consumption (at 12 V DC)	0.78 W * * Power figures for operation of this unit only. Connection to additional instrumentation or use of longer cables may require a higher input voltage .
PHYSICAL / ENVIRONMENTAL	Operating temperature range	-20 to +75 °C
	Operating humidity range	0-100% relative humidity
	Enclosure ingress protection	IP68 - protection against effects of prolonged immersion at 3 m depth for 72 hours. Posthole option:For deeper, long term immersion, the optional 100 bar/10 MPa waterproof connector is recommended
	Enclosure material	Stainless steel case O-ring seals throughout
	Diameter	168 mm
	Height	With handle: 203 mm Without handle: 177 mm
	Weight	7.1 kg
	Alignment	Bubble level on lid; north arrow on handle and base; adjustable feet
SUPPORTING DOCUMENTATION	Calibration values	Measured sensor sensitivity, frequency response, instrument poles and zeros enclosed
SUPPORTING DOCUMENTATION	User’s guide available online at https://www.guralp.com/documents/MAN-040-0001.pdf">https://www.guralp.com/documents/MAN-040-0001.pdf">https://www.guralp.com/documents/MAN-040-0001.pdf