Guideline Geo ABEM Terrameter LS 2 - User Manual

ABEM Terrameter LS 2
ELECTRICAL RESISTIVITY
Quick guide for 4-cable 48 & 64 electrode systems
For more detailed and in-depth instructions regarding proper usage of the instrument, please consult the ABEM Terrameter LS 2 User Manual .
The current and voltage transmitted can be life threatening. The emergency button must
be engaged while working with connected cables and electrodes. Before starting ANY
measurements, ensure survey cables and electrodes are not being handled or touched.
Keep connectors dry and clean. Poor connector handling and maintenance are the
main causes of cable failure. Always interconnect dust caps to keep them clean and
dry during measurements (right).
LAYOUT PROCEDURE
A. Setting-up for survey
- Measure a straight line along the ground. Profile length
= (no. of electrodes – 1) * electrode spacing.
- Hammer electrodes vertically into the ground along
survey line (depth < 1/10 of the electrode spacing).
- Place Take-out 1 of Cable 1 adjacent to the first
electrode in the spread. Walk cable reel 1 along the
survey line until all take-outs on the cable are aligned
with an electrode.
- Next, place Take-out 1 of Cable 2 at the next available
electrode. Walk cable reel 2 along survey line until all
cable take-outs are aligned with an electrode.
- Repeat with Cables 3 & 4. The last take-out (highest
number) on Cable 4 should coincide with last electrode.
- NOTE: If the electrode spacing
is much smaller than the cable
take-out spacing, avoid
coiling and excessive
overlapping of spare cable
between the take-outs (right).
- Take-out numbers should always increase along profile.
- TIP: To avoid confusion when processing results, profiles
should run in southerly-to-northerly or westerly-to-easterly
direction.
- Finally, place the ABEM Terrameter LS 2 instrument and
external battery in the middle of the survey line (between
Cable 2 and Cable 3).
B. Connecting and powering the system
- Press the emergency stop button in; this should be
the case whenever handling the cables / electrodes.
- Use cable joints to connect Cable 1 & 2 and Cable 3
& 4. Important: cable joints are directional. Ridges
on the cable joints should be towards the instrument.
- Connect jumper wires between cable take-outs and
electrodes (preferably connected to upright section).
- Put Cable 2 into Connector 1, and Cable 3 into Connector 2
on the instrument end panel.
- Using the external power cable, connect the instrument to
an external 12V car battery.
- Press the power button on the instrument to start.
Clicking noises will be audible during this start-up as
the instrument exercises the relay matrix.

Guideline Geo ABEM Terrameter LS 2 Specifications

General

Operating Temperature Range	-20°C to +50°C
Transmitter	Built-in
Current Output	2.5 A
Input Impedance	10 MΩ
Battery Life	10 hours
Measurement Principle	Induced Polarization (IP)
Category	Geophysical Instrument
Data Storage Capacity	Internal storage, SD card slot
Power Supply	Rechargeable battery
Voltage accuracy	0.5%
Current accuracy	0.5%

Summary

Layout Procedure

Setting-up for survey

Steps for setting up the survey line, placing electrodes, and laying out cables for resistivity measurements.

Connecting and powering the system

Instructions on connecting cables, power, and safely initiating the instrument for operation.

User Interface and Keyboard Functions

Welcome View & Screen Features

Overview of the instrument's screen layout, navigation menu, tabs, view, and status bar elements.

Keypad Functions

Explanation of how to use the instrument's keypad and its mapping to functions for navigation and operation.

Project and Settings

Create Project & Task

Guide to creating new projects and tasks, including setting up survey parameters like spread and electrode spacing.

Receiver & Transmitter Settings

Receiver Settings

Configuration options for the receiver, including measure mode, stacking, error limits, and acquisition times.

Transmitter Settings

Configuration options for the transmitter, covering current/voltage limits, electrode testing, and load variation.

Measurements

Measurement Configuration

Steps to configure measurement settings, including cable setup and initiating the measurement process safely.

Electrode Contact Test

Procedure for testing electrode contact resistance before starting measurements and troubleshooting failures.

Measurement Progress

How to monitor real-time measurement progress, view results, and interpret status bar information.

File Management

USB Project Download

Instructions for downloading project data from the instrument to a USB storage device.

USB Task Download

Instructions for downloading specific tasks from the instrument to a USB storage device.