Geotech ET WLM Manuale utente

Rev 04/22/2016 Part # 12050062

ET Water

Level Meter

Installation and Operation

Manual

Table of Contents

Section 1: System Description ....................................................................................4

Section 2: System Installation.....................................................................................7

Section 3: System Operation ....................................................................................10

Section 4: System Maintenance................................................................................11

Section 5: System Troubleshooting...........................................................................12

Section 6: System Specifications..............................................................................13

Section

System

Schematic

..................................................................................15

Section 8: Replacement Parts List............................................................................17

EC Declaration of Conformity....................................................................................20

The Warranty ..........................................................................................................201

DOCUMENTATION CONVENTIONS

This document uses the following conventions to present information:

WARNING

CAUTION

NOTE

An exclamation point icon indicates a WARNING of a situation or

condition that could lead to personal injury or death. You should

not proceed until you read and thoroughly understand the

WARNING message.

A raised hand icon indicates CAUTION information that relates to

a situation or condition that could lead to equipment malfunction

or damage. You should not proceed until you read and thoroughly

understand the CAUTION message.

A note icon indicates NOTE information. Notes provide additional

or supplementary information about an activity or concept.

Notice for consumers in Europe:

This symbol indicates that this product is to be collected

separately.

The following applies only to users in European countries:

This product is designated for separate collection at an appropriate

collection point. Do not dispose of as household waste.

For more information, contact the seller or the local authorities in charge

of waste management.

Section 1: System Description

Function and Theory

The Geotech ET Water Level Meter (ET WLM) is a portable instrument used to

accurately measure water levels in monitoring wells and bore holes. The sensor

consists of a stainless steel and PTFE probe attached to a reel-mounted,

polyethylene-coated engineer’s tape. The engineer's tape comes in standard or

metric graduations, and is accurate to 1/100th of a foot, or 1 millimeter.

The sensor relies on fluid conductivity to determine the presence of water. An

audible signal and visible red LED activate when the probe contacts water. It

features adjustable sensitivity, used to prevent false triggering.

The ET WLM is intended for use as a depth to water measuring device. Using

the ET WLM for any other purpose may compromise safety of the operator

and/or void manufacturer’s warranty.

To avoid damage to tape and strain relief, do not over tighten reel

with probe in storage position.

System Components

Figure 1-1

Figure 1-2

Figure 1-3

Figure

1-4

Section 2: System Installation

The reel frame has a metal loop called the “hanger”. The hanger can be used to

hang the reel frame onto the well casing (as shown in Figure 2-1). The tape can

then slide easily over the side of the reel leg.

Figure 2-1 Reel frame on well casing

If you are not able to hang the frame onto the well head, then either use the white

plastic leader guard (standard with all units), or the optional Tape Guide, to

prevent the edge of the well head from damaging the tape. Figure 2-2 is an

example of the two parts.

Figure 2-1 Tape Guide (optional) , Tape Weight (optional), Tape Leader Guard

Optional Tape Weight Installation

Attach tape weight to tape near probe end being lowered into well.

1) Loosen the screws using an Allen wrench.

2) Slide the weight onto the tape (Figure 2-2).

3) Tighten the screws (Figure 2-3).

Do not use the tape leader guard in wells larger than 4” (10cm), as it

may fall down the well. The optional tape weight helps sink probe

into a deep or crooked well

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