ARJAY ENGINEERING HYDROSENSE 4410-LMP User manual

MODEL: HYDROSENSE 4410-LMP
OIL IN WATER MONITOR
USER MANUAL (REV: 1.2)
ARJAY ENGINEERING LTD.
2851 Brighton Road
Oakville (Toronto), Canada
L6H 6C9
Tel: ++1 [phone]
Fax: ++1 [phone]
North America: 1-800-387-9487
Web: www.arjayeng.com
Email: [e-mail]

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HYDROSENSE 4410-LMP Revision 1.2 P age 3|29
TABLE OF CONTENTS
NOTICE
Please read the HydroSense Installation Notes (3.1) prior to locating
and mounting the enclosures.
SPECIFICATIONS....................................................................................................................................5
1.0USE HAZARD INFORMATION.......................................................................................................6
2.0INSTRUMENT OVERVIEW.............................................................................................................7
2.1  FEATURES..................................................................................................................................................... 7 
2.2  DESCRIPTION................................................................................................................................................ 7 
2.3  INTERFERENCES AND AFFECTS TO ACCURACY..................................................................................... 8 
2.4  ROUTINE CLEANING PROGRAM ................................................................................................................. 9 
3.0INSTALLATION............................................................................................................................10
3.1  HYDROSENSE INSTALLATION NOTES..................................................................................................... 10 
3.2  GLOSSARY OF SYMBOLS .......................................................................................................................... 11 
3.3  UNIT INSTALLATION ................................................................................................................................... 12 
3.4  PERMANENT POWER CONNECTION (AC POWERED MODELS ONLY).................................................. 14 
3.5  ELECTRICAL INSTALLATION...................................................................................................................... 14 
4.0STARTUP AND SETTINGS..........................................................................................................15
 NOTES ON VALUE ENTRY.......................................................................................................................... 15 
 PASSWORD PROTECTION......................................................................................................................... 16 
 POWERUP DISPLAY.................................................................................................................................... 16 
5.0CONTROL SETUP (<CONTROL> KEY).....................................................................................17
5.1  RELAY SETTINGS <1>................................................................................................................................. 17 
5.1.1  SETPOINTS <1>............................................................................................................................ 17 
5.1.2  TIME DELAY ON <2> .................................................................................................................... 17 
5.1.3  RELAY ENABLE / DISABLE <3> OR <4>..................................................................................... 17 
5.1.4  RELAY FAILSAFE <5> .................................................................................................................. 18 
5.2 M A OUTPUT SETTINGS <2>........................................................................................................................ 18 
5.2.1  4-20 mA OUT OR 0-20mA OUT <2>............................................................................................. 18 
5.2.2  mA DIRECT OR INDIRECT <3>.................................................................................................... 18 
5.3  TOOLS <3>................................................................................................................................................... 18 
5.3.1  RELAY TEST <1>.......................................................................................................................... 18 
5.3.2  mA OUTPUT TEST <2>................................................................................................................. 18 
6.0CALIBRATION SETUP (<CALIB> KEY).....................................................................................19
6.1  BEFORE CALIBRATION............................................................................................................................... 19 
6.2  CALIBRATION .............................................................................................................................................. 20 
6.2.1  SELECT # OF CALIBRATION POINTS <1>.................................................................................. 20 
6.2.2  AUTOMATIC CALIBRATION......................................................................................................... 20 
6.2.3  MANUAL CALIBRATION WITH LABORATORY RESULTS.......................................................... 21 
6.2.4  LIGHT REFERENCE AND TEMPERATURE SETTING................................................................ 21 
6.2.5  CHANGE CALIBRATION LOCATION ........................................................................................... 21 
6.2.6  CALIBRATION PERIOD................................................................................................................. 22 
7.0SETUP (OPERATION AND DIAGNOSTICS) (<SETUP> KEY)..................................................23
7.1  SYSTEM SETTINGS <1>.............................................................................................................................. 23 
7.1.1  NET ID <1> .................................................................................................................................... 23 
7.1.2  FILTER <2>.................................................................................................................................... 23 
7.1.3  UNITS <3> ..................................................................................................................................... 23 
7.1.4  PASSWORD <4>........................................................................................................................... 23 

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7.1.5MORE <5> ..................................................................................................................................... 23
7.1.6mA OUTPUT TRIM <1>................................................................................................................. 24
7.1.7DECIMAL POINTS <2>.................................................................................................................. 24
7.2DIAGNOSTICS <2> ...................................................................................................................................... 24
7.2.1PROCESS VALUES <1> ............................................................................................................... 24
7.2.2CALIBRATION DATA <2> ............................................................................................................. 24
7.2.3OTHERS ........................................................................................................................................ 24
7.2.4SN / HWREV <4>........................................................................................................................... 24
7.3DATE /TIME SETUP <3>.............................................................................................................................. 24
8.0TROUBLESHOOTING..................................................................................................................25
9.0CONTROLLER SETTING SHEET................................................................................................26
10.0SAMPLE PREPARATION (FOR CALIBRATION OR TESTING).............................................27
11.0PERIODIC TESTING AND MAINTENANCE ............................................................................28
11.1PERIODIC TESTING ................................................................................................................................ 28
11.2FLOW PLATE CLEANING ........................................................................................................................ 29
11.3LAMP REPLACEMENT............................................................................................................................. 29
11.4SPARE PARTS LIST................................................................................................................................. 29

TABLE OF FIGURES
FIGURE 1 – SECURE LAMP INSIDE THE LAMP BOX........................................................................12
FIGURE 2 – FLOW PLATE SECURE AGAINST TRAY........................................................................13
FIGURE 3 – BLUE LAMP BOX SECURE AGAINST TRAY..................................................................13
FIGURE 4 - USER INTERFACE.............................................................................................................15

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SPECIFICATIONS
Specifications are subject to change without notice:
Specification Details
Power Input: 100 - 230VAC (85-264VAC)*, 50/60Hz (47-63Hz)*, 1.26A – 0.62A, 2A Fuse
OPTIONAL: 24 VDC @ 3.5 A max
*Operational Range
User Interface:
Display Four line LCD with simultaneous display in PPM, current date and calibration
due
Communication Interface: RS-485 Modbus, optional HART or Fieldbus Foundation module for uni-
directional communication of ppm.
Relays / Analog Outputs:
Relay Outputs 6A DPDT Slave relays are available, dry contacts with LED panel indication
R1 & R2: Setpoint Alarm Relays: User settable alarm points and delay time
(0-99 seconds delay on)
R3: Maintenance relay- Maintenance is required (See Troubleshooting
section 8.0)
R4: Fault alarm relay – Service is required (See Troubleshooting section 8.0)
mA Signal Output 4-20 mA DC, 900 Ohms, isolated, field scalable
Instrument Performance:
Measuring Range 0 - 5000 ppm Hydrocarbon in Water
Instrument Accuracy ± 0.1 PPM
Process Accuracy +/- 1.0 ppm typical
The process accuracy is reflected by the site calibration to a known
hydrocarbon concentration and a stable background water. Changes in the
hydrocarbon make-up and variations in the process may affect the
instrument output.
Sensitivity 145 PPB (diesel reference) & 463 PPB (crude oil reference)
Calibration A library of up to 10 calibrations with up to five concentration entry points per
calibration to maximize accuracy
Signal Filtering 20-1000 samples/average
Environmental:
Ambient Temperature 5-55 C
Protect from direct sun or rain. Instrument shelter or indoor use is
recommended. Higher temperatures may be accommodated with air
conditioning.
Relative humidity Up to 90% (non-condensing)
Process Requirement:
Process Sample
Temperature 0-40 C without cooler; above 40 C with cooler.
Inlet Flow Rate Minimum: 1.0 L/M (continuous and stable)
Optimum: 3.0 to 5.0 L/M (continuous and stable)
Inlet pressure Minimum 2 psi, maximum 1000 psi, *minimum 20 psi when equipped with
optional cooler,
*For safety reasons a reducing valve should be used for pressure above 100 psi.

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Specification Details
Mechanical Specification:
Enclosure Dimensions 12.0"W x 37.5"H x 9.25"D (305mm W x 953mm H x 235mm D)
Sample Inlet 3/8” NPT female
Sample Outlet 2” NPT male (outfall must be unrestricted gravity to drain)
Weight 33Kg (73 lbs)
Enclosure Rating Type 4X, IP65, 316 Stainless Steel with viewing window
Approval Standards: CSA SPE1000 and Canadian Electrical Code (CEC)
USA National Electrical Code (NEC)
1.0 USE HAZARD INFORMATION
CAUTION Indicates a potentially hazardous situation that may result in minor or
moderate injury.
WARNING Indicates a potentially or imminently hazardous situation which, if not
avoided, could result in death or serious injury.
DANGER Indicates a potentially or imminently hazardous situation which, if not
avoided, will result in death or serious injury.
NOTICE Indicates a situation which, if not avoided, may cause damage to the
instrument. Information that requires special emphasis.

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2.0 INSTRUMENT OVERVIEW
2.1 FEATURES
Fluorescence technology
Non-contact sensor
Continuous On-Line monitoring
Instantaneous readings
Multi-point automatic or manual calibration
Temperature and light degradation compensation
4 relays (DPDT 6A contacts) (R1 and R2 for PPM alarms, R3 and R4 for maintenance alarm),
Isolated 4-20 mA output, RS-485 Modbus output, optional HART and Fieldbus Foundation
LCD display in PPM
No moving parts, complete maintenance without turning off the sample stream
2.2 DESCRIPTION
The HydroSense Oil in Water Monitor from Arjay Engineering Ltd. has been designed for municipal and
industrial applications to measure PPM levels of petroleum hydrocarbons in aqueous solutions. Typical
applications include PPM trace amounts of oil in effluent water from storm water runoff, oil in cooling
water, produced water, and oil/water separators. Other measurements and mediums can be monitored
on request (i.e. colorants in fluids, etc.).
A continuous sample is directed into the sample chamber using a pumped or process pressure source.
A stable flow rate is required. The sample is released from the sample chamber by a gravity flow to a
drain or sump.
The sample flow is dispersed evenly down an 88 mm x 200 mm flow plate. This dispersion
accomplishes two favorable results. Firstly, the sample is spread over a wide area, providing a large
surface area for the ultraviolet light to penetrate. This results in an increased excitation of the oil
molecules. Secondly, the gravity flow against the flow plate minimizes the sample depth against the
flow plate. This reduces the effect of suspended solids interference. Fewer oil molecules can ‘hide’ from
the light source.
After the sample leaves the flow plate, it is allowed to gravity flow to the outlet port. The sample outfall
must not be obstructed from gravity flow. For purge application a U-Trap would be required.
The ultraviolet light source is positioned directly in front of the sample flow. The receiver is positioned at
an angle to the flow direction. Both the emitter and the receiver are equipped with precision light filters
to control the wavelengths of the ultraviolet light being emitted and the fluoresced light being received.
A relationship between the measured fluoresced light and the amount of oil in the sample is
mathematically predictable over the measurement range of the instrument. The precision light filters
maximize the predictability over alternative non-filtered methods of measurement.
The sample tray is easily accessed for any necessary cleaning of the flow plate. The ultraviolet light
source is easily accessible for replacement as required.
For periodic testing and calibration, a 3-way valve in the inlet line is provided to manually input a fresh
water source to confirm the instrument response, zero and clean the instrument.

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2.3 INTERFERENCES AND AFFECTS TO ACCURACY
The UV fluorescence technique monitors the intensity of light emitted from the passing stream at a
selected wavelength band.
This technique can be quite selective by eliminating the light affect of compounds in the water that do
not share the same fluorescence characteristics of hydrocarbons.
1. When chemical compounds in the water are excited with light energy, only certain compounds will
emit the light back out of the water at a higher wavelength than excited with. These are referred to
as fluorescing compounds. The HydroSense does not respond to most chemicals because it only
responds to fluorescing compounds, of which aromatic hydrocarbons are included.
2. The light used to excite the compounds is filtered to 254 nm +/-. Of all the fluorescing compounds
only certain ones will respond to this wavelength. Some respond to higher and some to lower
wavelengths. This filter narrows the HydroSense response to only those that fluoresce from 254 nm
+/-.
3. This limited number of compounds that do fluoresce from 254 nm light may emit light at any number
of wavelengths such as 290nm, 310 nm, 350 nm 480nm, etc. Aromatic hydrocarbons happen to
fluoresce at approximately 350 nm. By filtering the light sensor from all light except 350 nm +/-, only
compounds that emit light at 350 nm +/- are indicated at the receiver.
4. Oil and Grease in water may be made up of hundreds or thousands of different hydrocarbon
compound structures. The aromatic compounds are fluorescing compounds. The proportion of
aromatics within the total hydrocarbons is generally consistent in a product or process. The
aromatics are therefore used as a tag to correlate the monitor to total hydrocarbons in water.
Changing Oil Types and Sources
Different oils have a different make-up of compounds and the fluorescing strength may vary between oil
types. For instance, diesel fuel may fluoresce much stronger than transformer oil. If the HydroSense is
calibrated using 100 PPM of diesel, 100 PPM of transformer oil may only give a display reading of 50
PPM.
Crude oil may vary from one well to another, lubricating oils from different manufacturers may vary in
their make-up; oils may be dissolved or free, and so on.
The calibration is therefore site selective and should be done using actual process water or with
samples of oil that are to be targeted by the monitor.
The calibrated accuracy relies on the oil type and conditions being consistent. The HydroSense will
respond positively to aromatic hydrocarbons but the display accuracy may be affected by variations in
the types and sources of these hydrocarbons.
Other Chemicals in the Water
The light sensor is selective to compounds in the water that emit light at 350 nm when excited from 254
nm light. If there is a background chemical in the water that fluoresces at these wavelengths, the
HydroSense will respond to them.
If this background chemical concentration is consistent, this interference will be zeroed out during
calibration. Calibration is recommended using process water so that any background interferences are
zeroed out.

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If an interfering background chemical changes in concentration, the HydroSense will sense this change.
Consideration to this affect is important for alarms and recording. Filtering of the water, changes to
chemical use, or special light filtering may be required to provide more stable readings.
The periodic introduction of fluorescing chemicals into the water may also affect the reading. During
these conditions, operators should be acknowledged that nuisance alarms may occur. Soap
manufacturers will often include fluorescing dyes in the product for appearance and identification.
Green dyes are typical in industrial degreasers and commercial soaps. Fluorescing chemicals are often
included in detergents to enhance the visual affect of a cleaned product such as clothes.
Not all of these commercial dyes will affect the wavelengths of the HydroSense, however, green dyes
have proven to be a common interference.
Suspended Solids and Turbidity
The unit is calibrated to a passing stream of water. The amount of light fluoresced by the aromatic
hydrocarbons determines the calibration parameters. The light received by a hydrocarbon and then
sent to the receiver is based on a stable light path through the water. If suspended solids or turbidity
block the light getting to the hydrocarbon, light cannot be fluoresced back to the sensor. Readings can
be dampened by an increase in solids or turbidity. When process water is used during the calibration,
the offset affect of solids is taken into account and zeroed out.
The design of the large surface sensing area verses the small sensing depth minimizes the affect of
turbidity in the HydroSense. In effect, the hydrocarbons have little place to hide behind solids. In
circumstances of dramatic changes in turbidity, sample-conditioning techniques prior to the
HydroSense should be considered.
Temperature Compensation
Temperature can affect the light sensor. Temperature compensation is built into the unit. The
temperature compensation coefficient will be preset at the factory.
2.4 ROUTINE CLEANING PROGRAM
The HydroSense relies on a constant flow of water across the sensing plate. Excessive particulates and
algae in the water can build up on the flow plate and in the overflow tray. This will eventually affect the
performance of the unit.
Setting up a Routine Cleaning Program is vital to the successful performance of the unit.
Each application will vary in the frequency of cleaning. Some may require daily wipes and some may
require monthly cleaning. A basic wipe down of the flow plate can be done without having to shutdown
the stream or power. The wipe procedure will take 2 to 3 minutes.
To set up a schedule, it is recommended to program a daily wipe of the flow plate using a clean paper
towel. After two weeks of daily cleaning, determine if every other day may be adequate. If so, set this
program in place for two weeks. Slowly extend the frequency between cleanings until an adequate
program frequency is determined for your individual site conditions.
Cleaning the flow plate and plastic surface should be done with clear non-fluorescing chemicals. An
appropriate flow plate cleaner is Windex brand “anti-fog”. Low concentrate Muriatic acid (18%) or
Isopropyl Alcohol are also effective. Use only chemicals approved for your site, personal safety and
disposal. Be sure to thoroughly rinse the flow plate with clean water before installing.
CAUTION Repeated visual contact with the light source can be harmful. Avoid
looking directly at the ultraviolet light source. Wear UV protection.

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3.0 INSTALLATION
NOTICE If any damage to the instrument is found, please notify an Arjay
Engineering representative as soon as possible prior to installation.
NOTICE Qualified Personnel must undertake all installations.
WARNING If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
3.1 HYDROSENSE INSTALLATION NOTES
NOTICE Read these notes before installation.
The system is comprised of two main components, the Sample Chamber and the Controller.
1) The Sample Chamber receives the flow sample from the process and outputs it to drain. The
chamber should be wall or rack mounted on a vertical and horizontal plane to allow a proper flow
through the sensing unit.
2) The Sample Chamber should be located close to the process to reduce the lag time of the sample
to the unit. This will offer more instantaneous readings and real time recording.
3) The outlet gravity flows to drain, and consideration of a close proximity to the drain is important.
Also, mount the unit where it is readily accessible for maintenance and periodic testing by manual
insertion of known samples.
4) If the process flow is not under pressure, the chamber should be mounted below the process level
so the sample can free flow down and through the unit. A pump may be used. The maximum input
pressure is 1000 psi although a reducing valve to less than 100 psi is recommended. The minimum
input flow rate is a continuous and stable 1 liter/minute. 3 – 5 liter/minute is recommended.
5) The inlet connection to the unit is a 3/8” female thread. A barb connection may be threaded to this
when flexible inlet tubing is used. Clear flexible 3/8” or 1/2” inlet tubing is suggested for the inlet
sample. This will provide a visible indication of the sample, as well as an indication of contaminant
build-up. To minimize the contamination in the tubing, Teflon lined tubing may be desirable.
Hazardous Locations or local regulations will dictate materials to be used.
NOTICE Clear tubing should not be used outdoors where algae build-up from
sunlight is increased.
6) An on/off valve at the process is recommended to shut down the system for maintenance and/or
sample tube replacement. (An on/off valve is included within the unit for throttling flow. This can be
used for internal maintenance). A 3-way valve is included at the inlet for a fresh water input for
zeroing, cleaning, and testing.
7) The sample gravity flows out of the Sample Chamber. The outlet tube must only be installed in a
downward vertical or downward graded horizontal direction. Any excessive upward direction will
cause the sample to back up and could flood the sample chamber.
8) The outlet fitting is a 2” male thread. Do not reduce this size. This will cause a restriction and flood
the system.