PASI WMS-INT User manual

WMS-INT
User Manual
Oil/Water Interface Meter
Ver.01.2023
P.A.S.I srl – via Galliari 5/E – 10125 TORINO – Italy
Tel. [phone] – Fax [phone] - E-mail [e-mail]
www.pasisrl.it

P.A.S.I srl – via Galliari 5/E – 10125 TORINO – Italy
Tel. [phone] – Fax [phone] - E-mail [e-mail]
www.pasisrl.it
Table of Contents
Table of Contents ..............................................................................................................2
Important Notice ...............................................................................................................3
Information about warranty and safety notes....................................................................4
1. Introduction ...............................................................................................................5
2. Technical Specification .............................................................................................6
Millimeter Cable ...........................................................................................................6
Probe..............................................................................................................................6
Main Characteristic .......................................................................................................6
Level Indicator ..............................................................................................................7
Power supply .................................................................................................................7
User interface ................................................................................................................7
Cable reel.......................................................................................................................7
3. User interface, functionality and maintenance..........................................................8
Panel ..............................................................................................................................9
Interface.........................................................................................................................9
Power on:.................................................................................................................10
Power off: ................................................................................................................10
Deactivation of the sound indicator: .......................................................................10
Auto Power Off: ......................................................................................................10
Features .......................................................................................................................10

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Important Notice
All rights to this manual are owned solely by P.A.S.I. srl. All rights reserved. The copying
of this manual (without the written permission from the owner) by printing, copying,
recording or by any other means, the complete or partial translation of the manual in any
other language, including all programming languages, using any electrical device,
mechanical, magnetic, optical, manual or other methods is prohibited.
P.A.S.I. reserves the right to change the technical specifications or functions of its
products, or to discontinue the production of any of its products or to discontinue the
support of any of its products, without any written announcement and urges its
customers to ensure that the information at their disposal is valid.
P.A.S.I. products have not been designed to be used in any way or application other than
those mentioned.
Torino, Italy 2023
Copyright: 2023 P.A.S.I. srl

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Information about warranty and safety notes
Read the instructions carefully before using the product:
This device has been designed and built to measure the level of liquid and oil/water
interface inside water well and piezometer. A careful reading of this manual is
recommended before proceeding with use.
- Warranty will be void if the product is used in any ways that is in contradiction with
the instructions given in this manual.
- Warranty will be void if the instrument has been tampered with.
- The device must only be used only according to the instructions described in this
manual. Faultless and safe operation of the device can be guaranteed only if the
transport, storage, handling and operation of the device is appropriate.
- To avoid damage, use only original accessories or approved by PASI srl.
- When a suitable location has been selected for the device, it must be ensured that no
water can get into the device under any conditions. Only the probe and the cable can
be submerged in water. Direct sunlight is also to be avoided for long periods. It is not
recommended that the instrument is installed on a strongly vibrating surface.

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1.Introduction
PASI WMS-INT it’s a water-oil interface meter and a water level meter.
The water level is readable on the millimetre cable. The device in made of an acoustic
indicator that notify the entrance and the exit in a liquid and with a LED indicator on the
front panel.
The LED Indicator also provide low battery signal.
The System is made of:
•Cable reel with a specified cable length and with a Probe for liquid
indication
•9V Battery included

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2.Technical Specification
Millimeter Cable
Flat Millimeter cable with steel ribbon core and 2 copper conductors (10x2 mm), covered
with a transparent scratchproof Polyurethane sheath.
The millimeter black indication is present all over the length of the cable, centimeters and
decimeters in black color, meters indication in red color.
Probe
Main Characteristic
Probe sensors
Optical and electrical conductivity sensor
Probe diameter
19mm
Probe length
220mm
Materials
Body and protective cap made of stainless steel; Prism
and cable clamp made of photopolymer resin.
F
IGURE
1
P
ROBE
D
ETAIL

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Level Indicator
Oil Indicator
Pulsing tone and pulsing LED indication
Water Indicator
Continuous tone and continuous LED indication
Power supply
Batteries
Duracell alkaline battery MN1604 User-replaceable
Battery Life
Up to 70h (depends on usage)
Auto Off
After 10min
User interface
Button
Single button for power on, power off and setting settings
Cable reel
Materials
PVC and metal
Weight
1.5Kg, 2.1Kg, 3.1Kg
Cable lenghts
30m, 50m, 100m
NOTE:
When the battery is low, the LED indicator will flash 10 times with a frequency of 1
second and then turn off automatically.

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3.User interface, functionality, and
maintenance
The instrument probe is equipped with two sensors for liquid detection:
1. Optical sensor
2. Electrical conductivity sensor
The optical sensor consists of a prism and an infrared emitter-receiver pair. This sensor
can identify whether the probe is immersed or not in a liquid, however it cannot discern
the type of substance.
The electrical conductivity sensor is activated when the optical sensor senses the presence
of a liquid. If it detects a conduction of electricity, the instrument will signal that the probe
is in the presence of water. If there is no passage of electricity, the instrument will signal
that the probe is immersed in oil.
If the probe is immersed in a liquid consisting of two phases, an underlying aqueous phase
and an overlying oily phase, the instrument will first signal the presence of the
nonconductive supernatant with the emission of a pulsing sound and light, then switch to
signal the conductive aqueous phase with constant sound and light.

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Panel
The instrument panel displays information about the instrument and its features.
Interface
The user interface consists of a single button with which all functions can be performed.
The instrument detects the number of pushes or the press time to perform specific
function:
•Power on;
•Power off;
•Deactivation of the sound indicator;
•Auto-off counter reset.
F
IGURE
2
PANEL
DETAIL

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Power on:
To turn the instrument on, you must press and hold the ON/OFF button until a pulsing
sound is made, indicating that the instrument is active and ready to work..
Power off:
Turning off is done by prolonged pressure; when the instrument beeps an intermittent
sound you can stop pushing the button and the instrument will turn off.
Deactivation of the sound indicator:
If the instrument is submerged and you prefer to turn off the audible indicator leaving
only the optical indicator active, you simply push the button once, while you are using
the instrument. This operation it is the reset when the instrument it is not in the liquid.
Auto Power Off:
Each time the ON/OFF button is pressed, the auto-off counter resets. The instrument will
only turn off after 10 minutes of inactivity.
Features
•Water phase detected: continuous sound and light emission from LED
indicator;
•Oil phase detected: intermittent sound and light emission from LED
indicator;
•Auto-off for 10 minutes if no power button presses are detected;
•If the battery is low, the LED indicator will flash 10 times with a frequency
of 1 second and then turn off automatically.

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Precautions for field use
The instrument may not be able to distinguish desalinated water from an 'Oil' as it is
poorly conductive.
In the case of a particularly viscous oil component, it is important to keep in mind that
the accuracy of the interface level measurement may be compromised by the presence of
oil on the electrodes used to measure water. A useful expedient to improve the
measurement is to measure the transition from water to oil and not vice-versa. For
example, if we are in the presence of water plus floating oil phase, it is preferable to dip
the probe through the oil while waiting for the instrument to indicate the presence of
water, then slowly pull the probe upward and measure the interface as the instrument
transitions from water to oil. To have a more accurate measurement of the oil floating
over water, it is best to consider the immersion measurement as the most reliable
measurement and not the extraction measurement, because a very thick liquid may
continue to coat the prism for a few moments after its surfacing.
Maintenance
To keep your instrument in perfect condition, remember to clean the cable and probe
thoroughly and dry them with a soft cloth after use.
To keep the measuring sensor clean and precise it is recommended to clean it on regular
bases.
To clean the probe, we recommend to use denatured ethyl alcohol and then rinse it in
distilled water.