ARJAY ENGINEERING HYDROSENSE 2410 User manual

MODEL: HYDROSENSE 2410
OIL IN WATER MONITOR
USER MANUAL (REV: 5.0)
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 HS2410 Revision 5.0 P age 3|27
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................................................................................................................................... 17 
5.1.2  RELAY TIME DELAY..................................................................................................................... 17 
5.1.3  RELAY ENABLE / DISABLE.......................................................................................................... 17 
5.2  OPERATING RANGE - M A OUTPUT SETTINGS......................................................................................... 17 
5.2.1  Confirm 4-20 mA OUTPUT direction.............................................................................................. 17 
6.0CALIBRATION SETUP (<CALIB> KEY).....................................................................................18
6.1  BEFORE CALIBRATION............................................................................................................................... 18 
6.2  CALIBRATION .............................................................................................................................................. 18 
6.2.1  AUTOMATIC CALIBRATION <1-AUTO>....................................................................................... 18 
6.2.2  MANUAL CALIBRATION WITH LABORATORY RESULTS.......................................................... 19 
6.2.3  GAIN SETTING.............................................................................................................................. 19 
6.2.4  LIGHT REFERENCE AND TEMPERATURE SETTING................................................................ 20 
6.2.5  CHANGE CALIBRATION LOCATION ........................................................................................... 20 
7.0SETUP (OPERATION AND DIAGNOSTICS) (<SETUP> KEY)..................................................21
7.1  AMPLIFIED SIGNAL <1>.............................................................................................................................. 21 
7.2  UNAMPLIFIED SIGNAL <2>......................................................................................................................... 21 
7.3  DIAGNOSTICS <3> ...................................................................................................................................... 21 
7.4  MIN/MAX <4>................................................................................................................................................ 21 
7.5  SETTING <5>................................................................................................................................................ 21 
7.5.1  mA TRIM <1>................................................................................................................................. 21 
7.5.2  FILTER <2>.................................................................................................................................... 22 
7.5.3  UNITS <3> ..................................................................................................................................... 22 
7.5.4  PASSWORD <4>........................................................................................................................... 22 
7.5.5  MODBUS ADDRESS <5>.............................................................................................................. 22 
8.0TROUBLESHOOTING..................................................................................................................23

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9.0CONTROLLER SETTING SHEET................................................................................................24
10.0SAMPLE PREPARATION (FOR CALIBRATION OR TESTING).............................................25
11.0PERIODIC TESTING AND MAINTENANCE ............................................................................26
11.1PERIODIC TESTING ................................................................................................................................ 26
11.2FLOW PLATE CLEANING ........................................................................................................................ 27
11.3LAMP REPLACEMENT............................................................................................................................. 27
11.4SPARE PARTS LIST................................................................................................................................. 27

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

HYDROSENSE HS2410 Revision 5.0 P age 5|27
SPECIFICATIONS
Specifications are subject to change without notice:
Specification Details
Power Input:
(Specify at the time of
order)
100 -130VAC* OR 207 - 253VAC* 50/60 Hz, 200 VA max,
OPTIONAL: 24 VDC @ 3.5 A max
*Operational Range
User Interface:
Display Four line LCD with simultaneous display in PPM, Cal Location, current
temperature, and bar graph
Communication Interface: RS-485 Modbus, optional HART or Fieldbus Foundation module for uni-
directional communication of ppm.
Relays / Analog Outputs:
Relay Outputs 4 independent SPDT, 10 amp (7 amp if used in Class I, Div 2 applications),
dry contacts with LED panel indication
2 setpoint alarm relays (R1 & R2): user settable alarm points and delay time
(0-99 seconds delay on)
1 maintenance alarm relay (R3)
1 Lamp or controller failure alarm relay (R4)
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: CAN/CSA-C22.2 No. 0-M91
CAN/CSA-C22.2 No. 94-M91
C22.2 No. 142-M1987
C22.2 No. 213-M1987 (Hazardous Location : Class I, Division 2, Groups
A, B, C and D)
UL 50 (11th Ed.) 1995
UL 916 (Third Ed) March 2006
UL 1604 (Third Ed) Feb 2004 ( Use in Class I and II, Division 2; Class III
Hazardous (Classified) Locations)
CE
ABS Design Assessment
IMO MEPC.107(49) (conditional to site monitoring requirements) **
(USCG certified)
* UL certified at 120 10% VAC and 230 10% VAC
** The HydroSense 2410 has been third party tested and certified that it is
in compliance with the IMO MEPC.107 (49) guidelines. The MEPC 107(49)
guidelines require that the site must log and retain data for 18 months. A
sample stream by-pass alarm must also be installed and logged. To meet
the IMO MEPC. 107(49), the site must consider these requirements. A kit
is available from Arjay Engineering if these conditions are not met at site.
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
Isolated inputs
Continuous On-Line monitoring
Instantaneous readings
Multi-point automatic or manual calibration
Temperature and light degradation compensation
4 relays (SPDT 10A 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.

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9) For non-purged/pressurized models the outlet of the tube should be open to air, not submerged in
water or a process which would cause a backpressure. This could result in a restriction of the
effluent flow and spillage within the lower chamber.
For purged/pressurized models, a slight and constant backpressure is required to maintain a
cabinet pressure. To accomplish this, submerge the effluent tubing approximately 10 cm below the
water surface or run the outlet tube with a slight upward grade or drain trap prior to the downward
outfall. Be sure the tube never rises higher than the bottom of the chamber outlet.
10)The Sample Chamber must be mounted indoors or in a heated housing when sample freezing may
occur. The inlet and outlet tubing must not be exposed to freezing environments. For outdoor
installation, the unit must be sun and rain shielded.
11)The controller operates using 120VAC, 50/60Hz, 220VAC, 50/60Hz or 24 VDC as ordered.
12)The monitor provides LED indication of the relay status. The relays are dry contacts and will accept
AC or DC inputs. Setpoint alarm levels are on Relay 1 & 2. Relay 3 is maintenance alarm, which
indicates offset drift and that cleaning, or re-calibration is necessary. Relay 4 indicates a Lamp
Replacement requirement or controller failure.
13)A 4-20 mA DC output signal proportional to the PPM level is provided. This is a signal capable of
driving 900 ohms. Remote indicators, receiving devices and their distances should be considered
when choosing a location for the Arjay Controller.
14)A RS-485 Modbus output is provided. This can be used to link to computers and other equipment.
Optional HART and Fieldbus Foundation are available.
15)Shielded wiring is required for the output alarms and signals to avoid EMI and RFI interference from
other equipment near the sample unit.
16)The Monitor is housed in a Type 4X 316 Stainless Steel enclosure. Extremes in temperature and
humidity should be avoided. Indoor or an environmentally mounted instrument shelter is
recommended.
17)
3.2 GLOSSARY OF SYMBOLS
Attention, consult accompanying documents
Attention, veuillez consulter les documents ci-joints.
Protective Earth
Terre de protection Fuse Coupe-circuit; fusible
Direct Current (DC)
Courant continu Normally open relay contacts Contacts travail
Normally closed relay contacts
Contacts Repos Power off ArróÕ (mise hors tension)
Power on
Marche (mise sous tension) LLive Sous tension
NNeutral
Neutre GGround Terre

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3.3 UNIT INSTALLATION
1) Locate an area that is environmentally protected from wide variances in temperature and
humidity. Indoor installations are recommended.
When selecting the location, consider that regular maintenance and testing is desirable for the
proper and accurate operation of the instrument.
If the sample input is not from a pumped source, locate the instrument in a position that will
receive a continuous representative sample from the process stream. The farther from the
stream, the greater the lag time of readings vs. actual process variance.
2) Mount the enclosure on a vertical wall or support of minimal vibration. The sample will be
flowing over a Flow Plate. A bubble level is provided in the sample chamber. Be sure the unit is
mounted level. This is necessary for a proper flow across the Flow Plate.
3) Open the Blue Lamp Box and secure the new lamp into place with the metal band and knurled
screw. Make sure the lamp is seated between two tabs of metal band as per picture below.
Figure 1 – SECURE LAMP INSIDE THE LAMP BOX
4) Plug the lamp terminal into the socket. Close the Blue Lamp Box.
TABS
SEATED BETWEEN TABS
KNURLED
SCREWS
METAL
BAND

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5) Insert the flow plate as shown below. The flow plate has a special reflective core and must be
placed in the Tray with the etched "UP" side facing out (toward you). Snug the knurled screws to
hold the flow plate in place.
Figure 2 – FLOW PLATE SECURE AGAINST TRAY
6) Place the Blue Lamp Box against the Tray and secure it with the retaining latch.
Figure 3 – BLUE LAMP BOX SECURE AGAINST TRAY
7) Be sure the 3 way valve with grab sample take off valve (supplied loose) is installed as per
drawings at the back of this manual. Make sure the inlet sources (process sample and clean
water) are valved for future maintenance and testing operations. Connect the inlet sources to
the 3/8” inlet of the 3 way valve. DO NOT TURN ON THE INLET SOURCES.
Connect the outlet source to drain or a sump.
LATCH
TRAY
LAMP BO
X
KNURLED
SCREWS
KNURLED
SCREWS
ETCHED
“UP” SIGN
FLOW PLATE SEAT
ON TRIANGULAR
PIECES

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For non-purged/pressurized models the outlet of the tube should be open to air, not submerged
in water or a process, which would cause a backpressure. This would result in an overflow
inside the chamber.
For purged/pressurized models, a slight and constant backpressure is required to maintain a
cabinet pressure. To accomplish this, submerge the effluent tubing approximately 10 cm below
the water surface or run the outlet tube with a slight upward grade prior to the downward outfall
such as a U-Trap. Be sure the tube never rises higher than the bottom of the chamber outlet.
8) Note that the outlet is a gravity feed line only. The outlet tube must NOT rise above the bottom
of the lower chamber or be connected to a pressure process line.
9) Confirm that the tray and flow plate are securely in place. Slowly open the inlet water source to
allow a steady and even flow over flow plate. Once the flow connections are verified and
operational, turn the water source off to continue with the electrical installation.
See video on Arjay Enginnering Ltd. website (www.arjayeng.com) for more information in using
HS2410 Oil in Water Montior.
3.4 PERMANENT POWER CONNECTION (AC POWERED MODELS ONLY)
1) Connection to the building wiring system shall be in accordance with the Canadian Electrical
Code (CEC), Part 1 in Canada, the National Electrical Code, ANSI/NFPA 70 in the USA, or the
local electrical codes of the country where the equipment is being installed.
2) An external mains switch or external over-current protection / circuit breaker device is required
as a disconnect device. This mains disconnect device shall be specified as complying with the
requirements of IEC 947-1 and IEC 947-3.
3) The external mains switch shall be in close proximity to the equipment and within easy reach of
the operator. The switch shall be marked as the disconnecting device for the equipment and
include the symbols to its “ON” and “OFF” positions using the following symbols:
Power Off Power On
4) The wiring for AC power should be 14 – 16 AWG / 300V or as required by local / country codes.
5) After field wiring, the primary wires must be secured to the enclosure by tie-wraps to maintain
the separation from the signal wires.
6) The equipment is suitable for connection to a 15A protected branch circuit.
7) Wiring diagram for permanent connection: See drawings at the back of this manual.
8) Use copper conductors only.
3.5 ELECTRICAL INSTALLATION
See drawings at the back of this manual.

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4.0 STARTUP AND SETTINGS
NOTICE Calibration must be performed after installation and any lamp
replacement.
Figure 4 - USER INTERFACE
NOTES ON VALUE ENTRY
When entering in numeric values, the cursor can be backspaced to correct mistakes by pressing the
DISPLAY key. This is only true if the cursor is not at the beginning of the displayed value, in which case
the DISPLAY menu is entered.
The decimal point is the dot ( ) key.
Values may be entered with any number of decimal places.
If the entered value is out of the allowed limits, the system displays the limiting value for 2 seconds. For
example, if the alarm time delay value is entered as 5000 seconds, then MAX. 99 is displayed for 2
seconds, and then entry is allowed again. The current value is not changed unless the entered value is
within limits. During value entry, the oil concentration is constantly updated in the background.

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PASSWORD PROTECTION
A password must be entered to access any of the 3 value entry menus (CALIB, CONTROL, SETUP> 5-
System) from the normal operating display menu. The factory default password is 2000. A customer
password may be added from the setup menu as described in section 8.1.4 Settings. The prompt for
entering the password is always 9999 regardless of the actual password.
POWERUP DISPLAY
After mechanical and electrical installation of the sample chamber and the controller have been
successfully completed, power up the unit. The LCD should show a similar screen (Normal Operating
Display):
O i l M o n i t o r C a l 0
50
p p m @ 2 0
º
C
Ø ¥ Ø à Ø
NOTE: The shown values are for example only.
The 1st line on right corner shows calibration location (Cal0 – Cal9). The unit can save 10 different
calibration curves (in each curve up to 5 points can be entered).
The 2nd line shows the oil concentration value in PPM and current temperature of sample chamber.
The 3rd line is blank.
The 4th line displays a bar graph of the oil concentration as a percent of the Output Full Scale. The bar
graph resolution is 5%.
The Status Indicator (see figure 4.0) should be green. If this is red, the LCD displays the System Error.
See the troubleshooting guide for details.

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5.0 CONTROL SETUP (<CONTROL> KEY)
To access the control setup settings, you will require a password. The password is “2000”.
5.1 RELAY SETTINGS <1>
Four relay alarm points are available for remote alarm. Of these, two are general-purpose alarm relays
with user settable alarm points, dead band (differential alarm points), and time delay. The remaining
two relays are to indicate Maintenace alarm (R3) and lamp failure (R4).
If the general-purpose alarm relays are to be used, press <CONTROL>, then press <1> for Relay
Settings Menu.
5.1.1 SETPOINTS
Press <1> for setpoints. Enter the value in PPM for relay R1 to activate. Press <ENTER>. Now enter
the value for the relay R1 to de-activate and press <ENTER>. A small differential between Relay HI and
Relay LO may be desired to eliminate relay chatter if the PPM concentration is fluctuating at the alarm
level. Similarly, enter the high and low alarm points for the second relay R2 if it is to be used. Note: for
a single point alarm with no differential, enter the LO alarm value identical to the HI alarm value.
5.1.2 RELAY TIME DELAY
To delay the relay alarm for a preset time (in seconds), press <2> for Enter On delay in the Relay
Setting Menu. This will suppress the alarm to eliminate a spurious momentary alarm that may be
caused by an oil globule or process variable not indicative of an alarm condition.
5.1.3 RELAY ENABLE / DISABLE
The relays may be disabled from operating for maintenance purposes. Confirm the relays are activated
in the lower right corner of the display in the RELAY SETTINGS menu. If the display reads ON (in the
lower right corner), the relays are activated. Press <3> to enable the relays or press <4> to disable the
relays.
The control functions are now entered. Press <CALIB> to calibrate or <DISPLAY> to return to the main
display.
5.2 OPERATING RANGE - mA OUTPUT SETTINGS
Determine the desired operating range of the instrument. This will reflect the 0 to 100% OUTPUT
display on the main menu, and the 4 to 20 mA output range of the instrument. For example, if the
operating range of the process is 0 to 30 PPM, a range of 0 to 50 PPM may be desirable. The display
will show 0-50 PPM equal to 0-100%. The control signal of 4-20 mA will represent 0-50 PPM. Press
<CONTROL> on the keypad, enter the password at the prompt, then press <2> for 4-20 mA Settings.
The display will prompt you to enter the zero point in PPM. This will typically be 0.0. Enter the value
and press <ENTER>. The display will prompt you to enter the span value (i.e., 50.0). Key in the
desired value and press <ENTER>.
5.2.1 Confirm 4-20 mA OUTPUT direction
The display will require a confirmation if the 4-20 mA signal is to be direct acting (4-20 mA = 0-100%),
or if inverse acting is required (20-4 mA = 0-100%). The lower left display will read mA: DIR. If this is
required, press <ENTER>. If inverse is required, press <1>.

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6.0 CALIBRATION SETUP (<CALIB> KEY)
NOTICE To access the calibration settings, you will require a password. The
password is ‘2000’.
NOTICE Calibration must be performed after installation and any lamp
replacement.
NOTICE Allow a minimum of 24 hours of power up prior to calibration to allow
the lamp to stabilize.
Using actual process stream flows for the calibration is desirable to provide the best accuracy. This will
zero out any background influences that may be present in the process water. At least two points of
entry at different contaminant levels are required. These levels may initially be unknown for calibration
purposes and entered in manual calibration at a later date after laboratory results are returned. One of
these points may be clean process water (0 PPM hydrocarbons).
Prepared samples may be used for calibration and testing although variations in personal blending
techniques, the source of the hydrocarbon and background water, the container used, and the retention
time prior to use will all play a part in the concentration reliability and repeatability.
6.1 BEFORE CALIBRATION
Open the sample chamber door. Lift the Lamp Blue Box off the tray and place it on the door brackets.
Check that the flow plate is resting securely in place against the tray. The flow plate has a special
reflective core and MUST be placed in the tray with the etched “UP” side facing out (toward you).
Slowly open the process stream valve to allow a steady and even flow over the flow plate. Check that
the outfall is draining well and water is not building up in the drain tray. Verify that the flow plate is
evenly and completely covered with the flowing water. The sample flow may not initially cover the whole
flow plate by itself. Stir up the flow plate by rubbing the flow plate so the water sheens evenly and
completely across the flow plate as it flows. Place the Lamp Blue Box back against the tray and secure
it with the retaining latch. Close the chamber door. Make sure the Sample Chamber Door is closed
tightly. The door MUST be closed to eliminate any background light interference during and after
calibrations.
6.2 CALIBRATION
For Calibration, the Hydrosense 2410 can accept up to 5 sample points to draw a calibration curve. A
calibration curve is used because some samples may not be linear as concentrations increase.
6.2.1 AUTOMATIC CALIBRATION <1-AUTO>
Press <CALIB> key, enter password at the prompt, then 1-AUTO.
Press <ENTER> to proceed to 1st calibration. Normally, the 1st point is clean process water (0.0 ppm).
Manually put the handle of the 3 way valve to the “up” position and let the clean process water flow
through the Hydrosense 2410. Enter the ppm value (0.0). Once the reading (FLR rdng) has stabilized,
press <ENTER> key. The display will now proceed to the second point.
A different concentration of contaminated water is required. If the process stream has a different
concentration than 0 ppm, put the handle of the 3 way valve to “down” position to allow the process
stream to flow through the Hydrosense 2410.

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If the concentration of process stream is close to 0.0 ppm, a prepared sample (refer to Section 10.0)
and a sample pump will be used. Disconnect the inlet of clean water and connect the prepared sample
into the inlet. Pump the prepared sample through the Hydrosense 2410.
Press <ENTER> to input ppm value of the 2nd point. Enter the known or unknown*ppm value of
stream concentration (i.e., 30.0 PPM). Once the reading (FLR rdng) has stabilized, press the <ENTER>
key.
*If the ppm value is unknown, enter a random value that would be indicative of what is flowing through
the unit and take a sample by opening grab sample take off valve at the same time. After finishing turn
back the valve to close position. Send the sample for lab analysis promptly. Record the FLR signal
value on the bottom line of the display. The laboratory ppm value and corresponding FLR reading (FLR
rdng) will be entered in manual calibration at a later date.
Press <0> to finish calibration OR Press <ENTER> to continue to third calibration and repeat the
above procedure for each additional concentration level. A minimum of two inputs is required.
THIS COMPLETES THE CALIBRATION IF KNOWN VALUES WERE ENTERED. If random unknown
values were entered, the laboratory results will need to be entered in manual cal (see Section 6.2.3) to
correct the values of the samples.
6.2.2 MANUAL CALIBRATION WITH LABORATORY RESULTS
When the lab results have been returned, press the <CALIB> key, enter the password at the prompt,
then press <2> for Manual Calibration.
Press <ENTER> to proceed to 1st point value. Your initial ppm value will be displayed. If a grab sample
was taken for this point, key in the lab value of sample in PPM and press <ENTER>. Otherwise, Just
press <ENTER>. The unit will prompt you to enter a FLR value in mV. This was recorded for you when
you first took the grab sample. Press <ENTER> to accept this and proceed to 2nd calibration point (2nd
point).
Press <ENTER> to procced to 2nd point value.
Key in the lab result in PPM of Sample # 2 if a grab sample was taken and press <ENTER>. Otherwise,
Just press <ENTER>. The unit will again prompt you to enter a FLR value that corresponds to your
sample. Press <ENTER> to accept this value.
Press <ENTER> to continue calibration and repeat the above procedure for each sample.
Press <0> to finish calibration, then press <DISPLAY> to main display menu.
THIS COMPLETES THE MANUAL CALIBRATION.
6.2.3 GAIN SETTING
The FLR signal gain is typically factory set and should only be modified if directed by an Arjay
Engineering representative. The procedure to change the gain is as follows:
Press the <CALIB> key, enter the password at the prompt, then press <4> to Set Gain.
Enter the new gain value then press <ENTER>. Note: the actual gain set may differ than the desired
value due to the resolution of the gain setting circuitry. The actual gain will be displayed if the gain
setting menu is re-entered.
Press <DISPLAY> to main display menu.

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6.2.4 LIGHT REFERENCE AND TEMPERATURE SETTING
With automatic calibration, the light reference and temperature are automatically recorded (REF @
CAL, TEMP @ CAL). The procedure to change these values is as follows:
Press the <CALIB> key, enter the password at the prompt, then press <3> to ManRef.
Enter the new REF @ CAL value at grab sample time, then press <ENTER>.
Enter the new TEMP @ CAL value, then Press <ENTER>.
Press <DISPLAY> to main display menu.
6.2.5 CHANGE CALIBRATION LOCATION
There are 10 calibration locations in Hydrosense 2410 (Cal 0 – Cal 9). Each location can have up to 5
points to draw a calibration curve. The procedure to change calibration location is as follows:
Press the <CALIB> key, enter the password at the prompt, then press <5> to Sel Cal.
Enter the location number (0-9), then press <DISPLAY> to main display menu.