Geotech ETL WLM+T User manual

Rev 05/23/2017 Part # 12050744
Water
Level Meter +
Temperature
Installation and Operation Manual

1
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

2
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.

3
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.

4
Figure 1-2: ETL WLM + T Side View
Figure 1-3: ETL WLM + T User Interface

5
Figure 1-4: ETL WLM + T Probe

6
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

7
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.

8
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.

9
Section 5: System Troubleshooting
Problem: No signal (audible or visible) when unit is turned on.
Solutions:
The battery is discharged. Check or change battery (Section 4: System
Maintenance).
The circuit is malfunctioning. Contact Geotech Service.
Problem: No indication of water.
Solutions:
The conductive contact is dirty. Clean the contact (Section 4: System
Maintenance).
There is an open connection in the tape. Replace tape and/or probe.
The circuit is malfunctioning. Contact Geotech Service.
Problem: The signal (audible or visible) is intermittent.
Solutions:
There is an open connection in the tape. Replace tape and/or probe.
There is a loose connection in the circuit or the probe. Repair the
connection.
Problem: The signal (audible or visible) is continuous when not in water.
Solutions:
The conductive contact is dirty (causing bridging). Clean the contact
(Section 4: System Maintenance).
There is a short in the tape and/or probe. Replace tape and/or probe.
The circuit is malfunctioning. Contact Geotech Service.
For technical assistance, call Geotech Environmental Equipment at 1-303-320-
4764 or 1-800-833-7958

10
Section 6: System Specifications
5/8” Probe
Material: Stainless steel, PTFE, Viton
Weight: 4.7 oz (133 g)
Diameter: 0.625” (1.59 cm)
Length: 6.125” (19.7 cm)
Minimum Conductivity
Threshold (detects water at): 10µS
Operating temperature range: 32 –158°F (0 –70°C)
Temperature accuracy: +/- 1°F (0.5°C)
Max immersion temperature: 302°F (150°C)
Tape
Material: PVDF coated steel tape w/ stainless steel conductors
Accuracy: 100th of a foot/100’ (3 mm/30.5 meters)
Per Federal Specification: GGG-T-106E
Reel/Frame
(100’–500’ frame)
Material: Steel & aluminum
Size: 15” H x 11.5” W x 10.5” D (38 cm H x 29 cm W x 27 cm D)
(750 –1000’ frame)
Material: Steel & aluminum
Size: 15” H x 11.5” W x 14.5” D (38 cm H x 29 cm W x 37 cm D)
Reel + Tape
Length: Weight:
100’ (30m) 14 lbs. (6.4 kg)
200’ (60m) 16 lbs (7.3 kg)
300’ (100m) 18 lbs. (18.2 kg)
500’ (150m) 20 lbs. (9.1 kg)
750’ (225m) 24 lbs. (10.9 kg)
1000’ (300m) 28 lbs. (12.7 kg)

11
Unit
Battery: 9 volt, Alkaline
Max power: < 1 Watt
Max sound pressure output: 75 dB @ 30 cm
Insulation rating:
Insulation rating is considered double as there are no hazardous voltages or
power circuits to pose a threat to the operator.
Battery life: Continuously detecting: 6 hours
On but not detecting: >1 year
Output tone: 5 kHz
Operating temperature range: 32 –158°F (0 –70°C)
Storage temperature range: -40 –158°F (-40 –70°C)
Response time: <10 milliseconds
Operating environment: Rated for outdoor use.
Humidity: 0-100%
Elevation: -328 –13,124’ (-100 –4000 meters)
Tape Weight (Optional) 1” (2.54cm) OD, 4” (10.16cm) Long,
12.74oz (361g)

12
Section 7: System Schematic
Figure 7-1: ETL Water Level Meter + Temperature (front view)
Figure 7-2: ETL Water Level Meter + Temperature (side view)

13
Section 8: Replacement Parts List
Parts List on next page

14
Item #
Parts Description
Part #
1
ASSY,REEL,300-500FT,GEOWLM
52050021
ASSY,REEL,750-1000FT,GEOWLM
52050043
2
PROBE HOLDER, 5/8", ETL
52050220
3
REPAIR,TAPE,WLM+T,100',PVDF TAPE
52050286
REPAIR,TAPE,WLM+T,200',PVDF TAPE
52050287
REPAIR,TAPE,WLM+T,300',PVDF TAPE
52050288
REPAIR,TAPE,WLM+T,500',PVDF TAPE
52050289
REPAIR,TAPE,WLM+T,750',PVDF TAPE
52050290
REPAIR,TAPE,WLM+T,1000',PVDF TAPE
52050291
REPAIR,TAPE,WLM+T,30M,PVDF TAPE
52050292
REPAIR,TAPE,WLM+T,60M,PVDF TAPE
52050293
REPAIR,TAPE,WLM+T,100M,PVDF TAPE
52050294
REPAIR,TAPE,WLM+T,150M,PVDF TAPE
52050295
REPAIR,TAPE,WLM+T,225M,PVDF TAPE
52050296
REPAIR,TAPE,WLM+T,300M,PVDF TAPE
52050297
4
ASSY,CONTROL,GEOWLM+T
52050299
5
ASSY,PROBE,GEOWLM+T
52050298
6
BRAKE,CAM LEVER DRAG,ETL
11400070
7
HANDLE,MANUAL CRANK,W/HDWR
12050624
8
O-RING, VITON, .480 x .039, BROWN
17500202
9
WASHER, WAVE
12050255
10
KNOB, INDICATING, 1/4”, RND
12050090
Not shown:
GUARD,LEADER,PROPAMIDE,NATURAL
12050060
GUIDE,TAPE,PVC
22050601
ASSY,WEIGHT,TAPE,SS,1"X4.1",0.75LBS (360 GRAMS)
52050277
BAG, WLM/IP, 500-1000’
12050113
BUZZER,3-24VDC,PIEZO
12050118
MANUAL, INSTRUCTION, GEOWLM+T
12050744

5/24/2017 15
EC Declaration of Conformity
Manufacturer: Geotech Environmental Equipment, Inc.
2650 E 40th Avenue
Denver, CO 80205
Declares that the following products,
Product Name: Water Level Meter + Temperature, manual rewind only
Model(s): ETL Water Level Meter + Temperature, all tape lengths
Year of manufacture: 2017
Conform to the principle safety objectives of 2006/95/EC Low Voltage Directive by
application of the following standards:
EN 61010-1: 2010
EN 809-1 + A1:2010
Year of affixation of the CE Marking: 2017
Conform to the protection requirements of 2004/108/EC Electromagnetic Compatibility
(EMC) by application of the following standards:
EN 61000-6-1: 2007
EN 61000-6-3: 2012
EN 61326-1: 2013
EMC conformity established 5/24/2017
Production control follows the ISO 9001:2008 regulations and includes required safety
routine tests.
This declaration issued under the sole responsibility of Geotech Environmental Equipment,
Inc.
Joe Leonard
Product Development
Serial number ________________

16
DOCUMENT REVISIONS
EDCF#
DESCRIPTION
REV/DATE
Project #
1470
Release, SB
5/15/2017

17
The Warranty
For a period of one (1) year from date of first sale, product is warranted to be free from
defects in materials and workmanship. Geotech agrees to repair or replace, at Geotech’s
option, the portion proving defective, or at our option to refund the purchase price thereof.
Geotech will have no warranty obligation if the product is subjected to abnormal operating
conditions, accident, abuse, misuse, unauthorized modification, alteration, repair, or
replacement of wear parts. User assumes all other risk, if any, including the risk of injury,
loss, or damage, direct or consequential, arising out of the use, misuse, or inability to use
this product. User agrees to use, maintain and install product in accordance with
recommendations and instructions. User is responsible for transportation charges
connected to the repair or replacement of product under this warranty.
Equipment Return Policy
A Return Material Authorization number (RMA #) is required prior to return of any
equipment to our facilities, please call our 800 number for appropriate location. An RMA #
will be issued upon receipt of your request to return equipment, which should include
reasons for the return. Your return shipment to us must have this RMA # clearly marked
on the outside of the package. Proof of date of purchase is required for processing of all
warranty requests.
This policy applies to both equipment sales and repair orders.
FOR A RETURN MATERIAL AUTHORIZATION, PLEASE CALL OUR
SERVICE DEPARTMENT AT 1-800-833-7958.
Model Number: ________________
Serial Number: ________________
Date of Purchase: ________________
Equipment Decontamination
Prior to return, all equipment must be thoroughly cleaned and decontaminated. Please
make note on RMA form, the use of equipment, contaminants equipment was exposed to,
and decontamination solutions/methods used. Geotech reserves the right to refuse any
equipment not properly decontaminated. Geotech may also choose to decontaminate the
equipment for a fee, which will be applied to the repair order invoice.

Geotech Environmental Equipment, Inc
2650 East 40th Avenue Denver, Colorado 80205
[phone] ● [phone] ● FAX [phone]
email: [e-mail]
website: www.geotechenv.com