Guralp Systems Limited
MAN-ESP-0001 - 3ESP - Operator's Manual

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1. Preliminary Notes 2. Introduction 3. Installing the 3ESP 4. Calibrating the 3ESP 5. Accessories 6. Inside the 3ESP 7. Appendices

Section Index: 5.1. The hand-held control unit

Chapter 5. Accessories

5.1 The hand-held control unit

This portable control unit provides easy access to the seismometer's control commands, as well as displaying the output velocity and mass position (i.e. acceleration) on an analogue meter. It takes input from the 26-pin connector at the bottom, and repeats it at the connector on the side for connection to further equipment.

The hand-held control unit can be sited up to 50 m from the breakout box.

3TB-handheld-control-unit

5.1.1 The meter

The meter at the top of the unit allows you to monitor the voltage outputs of the instrument. Using the knob below, you can select either the mass position output or the velocity output, for each of the three components. There is also a RANGE switch allowing you to alter the sensitivity of the meter.

5.1.2 Calibration

The hand-held control unit can be used to calibrate the 3ESP. To activate the calibration relays, turn the knob to the component you wish to calibrate, and introduce a calibration signal on the CAL SIG banana sockets.

5.1.3 Control commands

You can use the hand-held control unit to centre the sensor masses. If your 3ESP includes the remote locking and unlocking option, you can also lock and unlock the masses through the hand-held control unit as described below; otherwise, you will need to lock and unlock the masses manually (see Section 3.3, page 9.)

5.1.4 Outputs

The remaining banana sockets provide easy access to the output voltages of the instrument. For each component (vertical, N/S and E/W):

Ground references for each of these voltages are provided at the bottom of the unit. Ensure that you do not connect either side of a differential output to ground.

PreviousNext

1. Preliminary Notes 2. Introduction 3. Installing the 3ESP 4. Calibrating the 3ESP 5. Accessories 6. Inside the 3ESP 7. Appendices