Geotech ETL WLM+T Bedienungsanleitung

Rev 05/23/2017 Part # 12050744

Water

Level Meter +

Temperature

Installation and Operation Manual

Table of Contents

SECTION 1: SYSTEM DESCRIPTION ...................................................................3

SECTION 2: SYSTEM INSTALLATION .................................................................6

SECTION 3: SYSTEM OPERATION .....................................................................7

SECTION 4: SYSTEM MAINTENANCE ................................................................8

SECTION 5: SYSTEM TROUBLESHOOTING ........................................................9

SECTION 6: SYSTEM SPECIFICATIONS.............................................................10

SECTION 7: SYSTEM SCHEMATIC....................................................................12

SECTION 8: REPLACEMENT PARTS LIST .......................................................... 13

EC DECLARATION OF CONFORMITY ...............................................................15

THE WARRANTY ............................................................................................17

NOTE

DOCUMENTATION CONVENTIONS

This uses the following conventions to present information:

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.

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.

WARNING

CAUTION

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.

Section 1: System Description

Function and Theory

The Geotech ETL Water Level Meter +Temperature (ETL WLM+T) is a portable

instrument used to accurately measure water levels and temperature in

monitoring wells and bore holes. The sensor consists of a stainless steel and

PTFE probe attached to a reel-mounted, PVDF-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 blue LED activate when the probe contacts water, and

there is a mute button to silent the signal while probing for temperature. The reel

features adjustable conductivity sensitivity to prevent false triggering.

The ETL WLM+T is intended for use as a depth to water measuring device and

temperature sampling. Using the ETL WLM+T for any other purpose may

compromise safety of the operator and/or void manufacturer’s warranty.

System Components

Figure 1-1: ETL WLM + T Front View

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

with probe in storage position.

Figure 1-2: ETL WLM + T Side View

Figure 1-3: ETL WLM + T User Interface

Figure 1-4: ETL WLM + T Probe

Section 2: System Installation

Place the reel next to the well casing and carefully lower the probe into the well

using the tape leader guard to prevent damage to the tape.

An optional Tape Guide, to prevent the edge of the well casing from damaging

the tape, is also available from Geotech. Figure 2-1 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 and 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.

Figure 2-2: Fitting

(Optional) Tape Weight

Figure 2-3: Tightening

(Optional) Tape Weight

Section 3: System Operation

Turn ON the ETL WLM+T with the ON/SENSITIVITY knob. If the buzzer makes a

loud double-signal and the LCD turns ON, the battery is adequate for normal

operation.

Lower the probe down the well to the water surface. The blue light and buzzer

will activate when it make contact with the conductive fluid.

With the probe still in contact with the water, adjust the ON/SENSITIVITY knob

clockwise until the light and buzzer barely activate. In this setting, the probe will

detect the water level and avoid false triggering.

Water level and temperature measurements can now be taken from the top of

the casing or any reference point. There is a “Mute” button on the control

faceplate that silences the signal while probing for temperature. The blue LED

will stay illuminated while the probe is in water.

The ETL WLM+T should be stored with the ON/SENSITIVITY switch in the OFF

position. To turn the unit off, rotate the switch fully counter-clockwise until the

switch clicks. If the ETL WLM+T is not used and is stored for longer than three

(3) months, remove the battery to prevent battery leakage, which can cause

internal damage.

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

the reel with the probe in storage position.

This unit is not rated for use with hydrocarbons or flammable liquids.

If measuring depth to fluid of wells containing hydrocarbons, use

Geotech’s line of interface probe products.

Section 4: System Maintenance

Battery Replacement

Replace the battery when the audible and visible signals become weak or the

unit does not operate.

1. Gently remove the battery tray.

2. Remove the old battery and replace it with a new one.

Cleaning

The ETL WLM+T can be cleaned with mild detergents such as trisodium

phosphate (TSP). If other detergents are used, take care to select detergents

that are compatible with PTFE, PVDF, and stainless steel. The reel should not be

submerged in any liquid, but may be cleaned with a damp cloth.

Cleaning the Conductivity/Temperature Contact

The conductivity contact of the probe should be periodically cleaned with a non-

abrasive cleaner such as isopropyl alcohol, xylene, methanol, or phosphate free

type cleaner. To clean the conductivity contact, place a small amount of the

cleaner on a cotton swab; rub the conductivity contact to remove all foreign

matter. Repeat this process until all foreign matter has been removed.

Be aware of the polarity (+, -) of the battery when placing the new

battery in the tray. Use a 9V alkaline battery only.

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