Guralp Systems Limited
MAN-BHO-0010 - Güralp 40TB SlimLine - Operator's Guide

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1. Preliminary Notes 2. Introduction 3. Assembling the instrument 4. Installing the 40TB in a borehole 5. Calibrating the 40TB 6. Connector pin-outs 7. Specifications 8. Revision history

Chapter 7. Specifications

Velocity sensors

Velocity output bandwidth

spec – 100 Hz*

Mass position output

DC – spec Hz*

Velocity sensitivity

2 × 1,000 V/ms⁻¹**

Mass position sensitivity

1,000 V/ms⁻²

Controls

Gimbal locking and unlocking

Automatic, microprocessor controlled

Mass centring

Automatic, microprocessor controlled

Mechanics and electronics

Sensors

3 orthogonal sensors, each 0.180 kg

Lowest spurious resonance

above 140 Hz

Sensor transducer type

capacitive displacement

Feedback transducer type

magnet/coil

Connector

pressure tight, waterproof

Borehole diameter

89 – 229 mm

Temperature range with masses locked

–20 to +75 °C

Operational temperature range

–10 to +65 °C

Power

Supply requirements

12 – 30 Volts D.C.

Current at 24 V DC

75 mA†

* spec refers to the quoted frequency response value, e.g., for a “30 s” sensor, the value of spec would be 30 seconds (= 0.033 Hz).

** Sensors are available with a range of sensitivities between 2 × 750 and 2 × 10,000 V/ms⁻¹.

PreviousNext

1. Preliminary Notes 2. Introduction 3. Assembling the instrument 4. Installing the 40TB in a borehole 5. Calibrating the 40TB 6. Connector pin-outs 7. Specifications 8. Revision history