ARJAY ENGINEERING HYDROSENSE 4410-OCM User manual

MODEL:
HYDROSENSE 4410-OCM
OIL CONTENT MONITOR
USER MANUAL (REV: 1.0)
ARJAY ENGINEERINGLTD.
2851 Brighton Road
Oakville (Toronto), Canada
L6H 6C9
TEL: ++1 [phone]
FAX: ++1 [phone]
NORTH AMERICA: 1-800-387-9487
WEBSITE: www.arjayeng.com
EMAIL: [e-mail]

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TABLE OF CONTENT
NOTICE Please read the Installation Notes (4.1) prior to locating and mounting
the instrument.
1.0 SPECIFICATION .............................................................................................................. 5
2.0 USE HAZARD INFORMATION......................................................................................... 7
3.0 INSTRUMENT OVERVIEW .............................................................................................. 8
3.1 Features .......................................................................................................................................... 8
3.2 Description ...................................................................................................................................... 8
4.0 INSTALLATION................................................................................................................ 9
4.1 Hydrosense Installation Notes ......................................................................................................... 9
4.2 Unit Installation .............................................................................................................................. 11
4.3 Glossary of Symbols ..................................................................................................................... 11
4.4 Permanent Power Connection (AC Powered Model Only) ............................................................ 12
4.5 Electrical Installation ...................................................................................................................... 12
5.0 STARTUP AND SETTINGS............................................................................................ 13
5.1 Notes on Value Entry .................................................................................................................... 13
5.2 Password Protection ..................................................................................................................... 14
5.3 Power-Up Display .......................................................................................................................... 14
6.0 CONTROL SETUP.......................................................................................................... 15
6.1 Relay Settings <1> ........................................................................................................................ 15
6.1.1 Setpoint <1> ...................................................................................................................... 15
6.1.2 Time Delay On <2> ........................................................................................................... 15
6.1.3 Relay Enable / Disable <3> OR <4> ................................................................................. 15
6.1.4 Relay Failsafe <5> ............................................................................................................ 16
6.2 mA Output Settings <2> ................................................................................................................ 16
6.2.1 4-20mA Out OR 0-20mA Out <2> ..................................................................................... 16
6.2.2 mA Direct OR Inverse <3> ................................................................................................ 16
6.3 Tools <3> ...................................................................................................................................... 16
6.3.1 Relay Test <1> .................................................................................................................. 16
6.3.2 mA Output Test <2> .......................................................................................................... 16
7.0 SETUP (OPERATION AND DIAGNOSTICS) (<SETUP> KEY)...................................... 17
7.1 System Settings <1> ..................................................................................................................... 17
7.1.1 Net ID <1> ......................................................................................................................... 17
7.1.2 Filter <2> ........................................................................................................................... 17
7.1.3 Units <3> ........................................................................................................................... 17
7.1.4 Password <4> ................................................................................................................... 17
7.1.5 More <5> ........................................................................................................................... 17
7.1.6 mA Output Trim <1> .......................................................................................................... 17
7.1.7 Decimal Point <2> ............................................................................................................. 17
7.2 Diagnostics <3> ............................................................................................................................. 18
7.2.1 Process Value <1> ............................................................................................................ 1 8
7.2.2 Calibration Data <2> ......................................................................................................... 1 8
7.2.3 More <4> ........................................................................................................................... 18
7.2.4 SN / HWRev <3> ............................................................................................................... 1 8
7.3 Date / Time Setup <4> .................................................................................................................. 18

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8.0 CALIBRATION (<CALIB> KEY)..................................................................................... 19
8.1 BEFORE CALIBRATION ............................................................................................................... 19
8.2 CALIBRATION .............................................................................................................................. 20
8.2.1 Automatic Calibration <1> ................................................................................................. 20
8.2.2 Manual Calibration With Laboratory Results <2> .............................................................. 21
8.2.3 Zero Offset <3> ................................................................................................................. 21
8.2.4 Select # of Calibration Points <4> ..................................................................................... 21
8.2.5 More <5> ........................................................................................................................... 21
8.2.6 Calibration Reminder <1> ................................................................................................. 22
9.0 SAMPLE PREPARATION FOR OIL (FOR CALIBRATION OR TESTING)..................... 23
10.0 PERIODIC TESTING AND MAINTENANCE................................................................... 24
10.1 ROUTING CLEANING PROGRAM .......................................................................................... 24
10.2 CONDENSATION ..................................................................................................................... 24
10.3 PERIODIC TESTING ................................................................................................................ 24
10.4 FLOW TUBE CLEANING ......................................................................................................... 25
10.5 LED REPLACEMENT ............................................................................................................... 25
10.6 RECOMMENDED 2 YEAR SPARE PARTS LIST .................................................................... 25
11.0 CONTROLLER NETWORK............................................................................................ 26
11.1 MODBUS CONFIGURATION ................................................................................................... 26
11.2 MODBUS REGISTER MAPPING ............................................................................................. 26
12.0 TROUBLESHOOTING.................................................................................................... 28
13.0 CONTROLLER SETTING SHEET.................................................................................. 29
TABLE OF FIGURES
FIGURE 1 - USER INTERFACE ............................................................................................. 13

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1.0 SPECIFICATION
Specifications are subject to change without notice
Specification Details
Power Input: 100 - 230VAC, 50/60Hz, 0.63 – 0.31A, 1A Fuse
OPTIONAL: 24 VDC @ 360 mA max, 1/2 A Fuse
User Interface:
Display Four line LCD with simultaneous display in PPM or mg/L, NTU, current date
Resolution: 0.1 ppm
Communication Interface: RS-485 Modbus, optional HART or Fieldbus Foundation module for uni-
directional communication of ppm.
Relays / Analog Outputs:
Relay Outputs 3A SPDT @ 250V relays are available, dry contacts with LED panel
indication
R1, R2 & R3: Setpoint Alarm Relays: User settable alarm points and delay
time
R4: Fault / Maintenance Relay– Service is required (See Troubleshooting
section 11.0)
Time Delay ON: 0 – 99 sec
mA Signal Outputs 4-20 mA DC, 900 Ohms, field scalable
Instrument Performance:
Measuring Range 0 - 250 ppm Hydrocarbon in Water
Instrument Accuracy ± 1% of calibration range
Process Accuracy +/- 1.0 ppm of Full Scale (calibrated range)
The process accuracy is reflected by the site calibration to a known oil
concentration and a stable background water. Changes in the oil make-up
and variations in the process may affect the instrument output. Through a
simple calibration, this unit correlates with laboratory methods
Sensitivity Oil: 145 PPB (diesel reference) & 463 PPB (crude oil reference)
Calibration Oil: Up to five concentration entry points to maximize accuracy
Response Time Signal
Filtering
Adjustable 20-100 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) (Note: Heat transfer unit is recommended for
high and extended levels above 80% humidity)

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Specification Details
Process Requirement:
Process Sample
Temperature 0-55 °C (32-130 °F) without cooler; above 55 °C (130 °F) with
sample cooler.
Inlet Flow Rate Minimum: 1.0 L/M (continuous and stable) at 2psig
Maximum: 7.5 L/M (continuous and stable) at 100psig
Inlet Water Pressure
Minimum 2 psig OR 25psig with sample cooler option
Maximum 300psi, Without Sample Take off assembly (With SS fittings)
Maximum 125psi, Without Sample Take off assembly (With PVC fittings)
Maximum 300psi, With Stainless Steel Sample Take off assembly (Option)
Maximum 125psi, With PCV Sample Take off assembly (Option)
Instrument Air 5-10psi (30-60 SCFH / 14-28 LPM), used to minimize condensation in
humid and low dew point applications.
Mechanical Specification:
Controller (Standard):
Material Steel with Polyester Powder Blue (RAL5015) painted
Enclosure Dimensions 305mm W x 305mm H x 127mm D (12.0"W x 12.0"H x 5.0"D)
Electrical / Signal Ports 1/2” Conduit Holes (Qty. 3)
Shipping Weight 8 Kg (17.6 lbs) approximate
Enclosure Rating Type 4, IP66 with viewing window
*Custom sizes & materials available. Please consult factory for more detail.
Sensor Block (Standard):
Material Steel with Polyester Powder Blue (RAL5015) painted
Enclosure Dimensions 355.6mm W x 305mm H x 152.4mm D (14.0"W x 12.0"H x 6.0"D)
Sample Inlet 1/4” NPT female (3/8” NPT female for SS bulkhead)
Sample Outlet 1/4” NPT female (3/8” NPT female for SS bulkhead)
Wetted Material Quartz flow through tube, Quartz test tube, Polyurethane tubing (black),
PVC fittings (Stainless Steel option available), PVC sample take off
assembly (Stainless Steel option available).
Shipping Weight 9.1Kg (20 lbs)
Enclosure Rating Type 4, IP66
*Custom sizes & materials available. Please consult factory for more detail.
Warranty: 1 Year from ship date
Approval Standards: CSA SPE1000 and Canadian Electrical Code (CEC)
USA National Electrical Code (NEC)

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2.0 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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3.0 INSTRUMENT OVERVIEW
3.1 Features
• Fluorescence technology for Oil
• Closed loop flow-through sensor
• Continuous On-Line monitoring (slipstream)
• Instantaneous readings
• Multi-point automatic or manual calibration
• Temperature and light degradation compensation
• 4 Relays (R1, R2 and R3 for setpoint alarms, R4 for fault or Maintenance alarm),
• LED board
• 3 Receiver boards: Rx1 (ppm or mg/L), Rx2 (mV) and Rx3 (Turbidity alarm)
• 4-20 mA outputs, RS-485 Modbus output, optional HART and Fieldbus Foundation
• LCD display in PPM or mg/L
• No moving parts or consumables
3.2 Description
The HydroSense Oil Content 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, de-salination, filter systems and oil/water separators. Other measurements and
mediums can be monitored on request (i.e. colorants in fluids, etc.).
A continuous sample flow is directed through the sensor block (Model: SBA-XXXXXXZ) using a
pumped or process pressure source. The sample can be looped back to process line or to drain.
The non-contacting ultraviolet light source is positioned directly in front of the sample flow. The receiver
boards are positioned at a determine angle to maximize their response. The LED board emits a
selected wavelength and the Rx1 receiver board is equipped with a precision light filter 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.
Additional receivers (Rx2 & Rx3) monitor the sample flow and optical surfaces for any maintenance
concerns which are indicated through the maintenance relay and display.
The sample tube is easily accessed for any necessary cleaning. 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 recommended to manually input a
fresh water source to confirm the instrument response, zero and clean the instrument.

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4.0 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.
4.1 Hydrosense Installation Notes
NOTICE Read these notes before installation.
The system is comprised of two main components, the Controller and Sensor Block Assembly (SBA).
1) The Sensor Block Assembly receives the flow sample from the process and outputs it back to the
process line or to drain.
2) The Sensor Block Assembly 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 can flow back to the process. Mount the unit where it is readily accessible for
maintenance and periodic testing.
4) The inlet connection to the unit is a 1/4” NPT female thread (3/8” NPT female for SS bulkhead). A
barb connection may be threaded to this when flexible inlet tubing is used.
NOTICE Clear tubing should not be used outdoors where algae build-up from
sunlight is increased.
5) An on/off valve from the process is required close to the sensor for maintenance and/or sample
tube replacement. A 3-way valve is recommended at the inlet for a fresh water input for zeroing,
cleaning, and testing.
6) The Sensor Block Assembly enclosure must be mounted indoors or in a heated housing if sample
freezing may occur. The inlet and outlet tubing must not be exposed to freezing environments. For
outdoor installations, the unit must be sun and rain shielded. A heat transfer unit (A/C) is
recommended for high temperature, humid climates.
7) The controller operates using 100-230VAC, 50/60Hz, 1PH, 0.63A – 0.31A or 24 VDC as ordered.
8) 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 & 3. Relay 4 indicates Maintenance /
Fault alarm, which indicates offset drift and that cleaning or re-calibration is necessary.
9) 4-20 mA DC output signals proportional to oil concentration and turbidity are provided. Each signal
is capable of driving 900 ohms. Remote indicators, receiving devices and their distances should be
considered when choosing a location for the Arjay Controller.
10) A RS-485 Modbus output is provided. This can be used to link to computers and other equipment.
Optional HART, Fieldbus Foundation and other communications are available.

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11) Shielded wiring is required between the controller and sample block enclosure as well as for the
output alarms and signals to avoid EMI and RFI interference from other equipment near the
sample unit. Shield should be connected to earth ground at controller side only.
12) The Controller and Sensor Block Assembly enclosures are housed in a Type 4 / IP66 enclosure.
Other enclosure options are available (consult factory for more detail). Extremes in temperature
and humidity should be avoided. Indoor or an environmentally mounted instrument shelter is
recommended.
13) The Sensor Block assembly enclosure includes a door mount bracket for the tube assembly during
testing and maintenance.
Flow-tube assembly
Bracket

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4.2 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
through a Flow tube. Be sure the unit is mounted level.
3) Make sure the inlet sources (process sample and clean water) are valved for future maintenance
and testing operations. Connect the inlet sources to the 1/4” NPT female (3/8” NPT female for SS
bulkhead) inlet of as per the drawings.
4.3 Glossary of Symbols
Attention, consult accompanying documents
Attention, veuillez consulter les documents ci-joints.
Protective Earth
Terre de protection
Power on
Marche (mise sous tension
Direct Current (DC)
Courant continu
Power off
ArróÕ (mise hors tension)
Normally closed relay contacts
Contacts Repos
L Live
Sous tension
Normally open relay contacts
Contacts travail
N Neutral
Neutre
Fuse
Coupe-circuit; fusible
G Ground
Terre

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4.4 Permanent Power Connection (AC Powered Model 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) An external switch or breaker 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 minimum 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.
4.5 Electrical Installation
See drawings at the back of this manual.

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5.0 STARTUP AND SETTINGS
NOTICE Calibration must be performed after installation and any lamp
replacement.
Figure 1 - USER INTERFACE
5.1 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.
The decimal point is the dot ( ) key.
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 and NTU is constantly updated in the background.

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5.2 Password Protection
A password must be entered to access any of the 3 value entry menus (CALIB, CONTROL, SETUP> 1-
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 7.1.4 Settings. If a new
password is entered then password 2000 is no longer available. Consult factory to reset if required. The
prompt for entering the password is always 9999 regardless of the actual password.
5.3 Power-Up 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):
Oil Content Monitor
0pp
m
2018/08/18 16:28hr
NOTE: The shown values are for example only.
The 2nd line shows the oil concentration value in PPM.
The 3rd line shows for error codes
The 4th line shows the current date and time or error codes

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6.0 CONTROL SETUP
To access the control setup settings, you will require a password. The password is “2000” then press
<Enter>.
CONTROL SETTINGS
1-Relay Settings
2-mA Output Settings
3-Tools
6.1 Relay Settings <1>
Four relay alarm points are available for remote alarm. Of these, three are general-purpose alarm
relays with user settable alarm points, dead band (differential alarm points), and time delay. The fourth
relay (R4) is to indicate Maintenance and Fault alarms.
If the general-purpose alarm relays are to be used, press <CONTROL>, then press <1> for Relay
Settings Menu.
1-Setpoints
2-Time Delay On
3-Enable 4-Off On
5-Relay Failsafe
6.1.1 Setpoint <1>
Press <1> for Setpoints. Enter the value in PPM or mg/L 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 concentration is fluctuating at the alarm
level. Similarly, enter the high and low alarm points for the second and third relay Note: for a single
point alarm with no differential, enter the LO alarm value identical to the HI alarm value.
6.1.2 Time Delay On <2>
To delay the relay alarm for a preset time (in seconds), press <2> for Time Delay On in the Relay
Setting Menu. Select which relay is to be setup and then enter value in seconds. 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.
6.1.3 Relay Enable / Disable <3> OR <4>
The three general purpose relays may be disabled from operating for maintenance purposes. Confirm
the relays are activated on the right side of line 3 in the RELAY SETTINGS menu. If the display reads
On, the relays are activated. Press <3> to enable the relays or press <4> to disable the relays. As a
reminder to turn the relays back on after maintenance the main display will show relays disabled
on line 3.

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6.1.4 Relay Failsafe <5>
The relays may be set as Failsafe or Non Failsafe. In failsafe mode the relays are energized under
normal operation.
Failsafe typically means that the relay is held in an energized state when in a normal operating
condition as opposed to an alarm condition. In an alarm condition, the relay de-energizes which is
identical to when the instrument power is shut off. The rationale is that the alarm condition should
match the Power Fail condition. The factory default is On for Failsafe.
6.2 mA Output Settings <2>
Determine the desired operating range of the instrument. This will reflect the 4 to 20 mA output range of
the instrument. For example, an oil concentration range of 0 to 50 PPM may be desirable. 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 mA output settings. The display will prompt you to set up Output # 1,
which is the oil concentration output. Press <1> for mA Zero / Span setup. The zero output will
typically be 0.0 ppm. Enter the desired value and press <ENTER>. The display will prompt you to
enter the span value (i.e., 50.0). Enter the desired value and press <ENTER>.
Set mA Output#1
1=mA Zero/Span setup
Out:4-20mA 2=0-20mA
mA=DIR 3=INV ->
6.2.1 4-20mA Out OR 0-20mA Out <2>
The mA output signals can be set for 4-20mA or 0-20mA. The third line of display will show the present
setup (Out: 4-20mA). Press <2> to change the desired setting.
6.2.2 mA Direct OR Inverse <3>
The mA output signal can be set for direct acting (4-20mA = 0-50ppm), or inverse acting (20-4mA = 0-
50ppm). The lower left display will read the present setup (mA: DIR). Press <3> to change the desired
setting.
6.3 Tools <3>
6.3.1 Relay Test <1>
This feature allows the user to toggle ON and OFF each relay for maintenance purpose. Press the #
keypad for each corresponding relay. (e.g.1=R1). Press “Enter” To Exit this menu.
6.3.2 mA Output Test <2>
This feature allows the user to check the mA output at 4mA <1> and 20mA <2> OR Enter a desired
value <3>. This is for maintenance purpose only.

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7.0 SETUP (OPERATION AND DIAGNOSTICS) (<SETUP> KEY)
S E T U P
1-System 2-LED
3-Diagnostics
4-Date/Time Setup
7.1 System Settings <1>
Press the <SETUP> key then Press <1> for system settings, enter the password at the prompt, then
press <ENTER>.
7.1.1 Net ID <1>
Press <1> for Net ID address. The modbus address is used only for network applications and is always
factory set to 1. To communicate on a network, each controller must have a unique modbus address.
Important: If multiple units on a network have the same address, network errors will result. Enter the
desired tag number if multiple units are installed in a network.
Enter the desire modbus address, press <ENTER>.
7.1.2 Filter <2>
Press <2> for filter. The moving average filter tracks the average of the last # of samples. Higher values
provide more stable readings. Max value is 100. The default value is 20. Alarms may come on while the
filter is re-calculating.
7.1.3 Units <3>
Press <3> for units. There are 4 display units available: ppm, mg/L, FLR and NTU. Press <1> for ppm,
<2> for mg/L, <3> for FLR and <4> for NTU.
7.1.4 Password <4>
Press <4> to change the password if desired, enter a new password at the prompt, then press
<ENTER>. Note: Once a new password is entered, password 2000 is not available. Consult factory to
reset to original password if required.
7.1.5 More <5>
Press <5> for further options.
7.1.6 mA Output Trim <1>
Press <1> for mA output Trim. This procedure trims the mA output for maximum accuracy by
compensating for the mA output circuitry tolerances. Note: THIS PROCEDURE IS PERFORMED AT
THE FACTORY AND IS TO BE PERFORMED BY AUTHORIZED PERSONNEL ONLY. IF
IMPROPERLY DONE, THE ACCURACY OF THE MA OUTPUT CAN BE IMPAIRED.
7.1.7 Decimal Point <2>
Press <2> to change the place of decimal. Press desired decimal place from the selection (0, 1 or 2).
Once selected the screen will go back to system Setup menu.

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7.2 Diagnostics <3>
There are a number of diagnostic screens to monitor the performance of the unit. Press <3> for
diagnostics.
DIAGNOSTICS
1-Process values
2-Calibration data
3-SN/HWRev 4-More
7.2.1 Process Value <1>
Press <1> for Process values. There are up to 3 receiver boards and one LED board available. Rx1
receiver board is mounted on a 45° angle to LED 1 board and is used to receive the fluorescent signal
for ppm oil content. Rx2 receiver board is 180° to LED 1 board and used to monitor LED degradation
and flow tube fouling. Rx3 receiver board is mounted 90° to LED 1 board and used to monitor high
turbidity of process water. Each screen displays the concentration in the selected units of each receiver
board. The values when the LED is On as well as Off are displayed as well as the respective difference
between the On and Off values shown in mV. The Off values are typically a measure of the background
fluorescence and are therefore subtracted from the On values. The 3rd line shows the current
concentration in the selected units and mV (sample fluorescence). The 4th line shows the current
temperature (T) on the receiver board as well as the current temperature compensation.
Selecting <4> - All, allows the user to display the ppm and mV values of all receiver boards at once.
7.2.2 Calibration Data <2>
Press <2> for calibration data values. This section will show the calibration points for each receiver
board at calibration. Press Enter to continue to next receiver board.
7.2.3 More <4>
Press <4> for more diagnostic data values. The screen displays the current relay settings and mA
output settings.
7.2.4 SN / HWRev <3>
This section records the serial number, hardware revision, software revision and Modbus ID number.
7.3 Date / Time Setup <4>
This feature allows the user to set the current date and time. Press <1> to change Date and press <2>
to change Time.

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8.0 CALIBRATION (<CALIB> KEY)
NOTICE To access the calibration settings, you will require a password. The
password is ‘2000’ or user selected password (See section 7.1.4)
NOTICE Calibration must be performed after installation and any LED or
Receiver board replacement.
NOTICE Allow a minimum of 24 hours of power up prior to calibration to allow
the LED light source 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. The unit is factory set
for two calibration entry points to create a calibration slope specific to your installation. Two calibration
points are typical for most applications. For high accuracy or high range applications, up to 5
calibration points can be entered. To change the number of calibration entry points see 8.2.4.
The first calibration point for each will be 0 ppm (mg/l) oil in water. Clean process water is preferred. If
not available, tap water connected to a 3-way valve can be used.
The second calibration point for oil should be process water with a preferred ppm (mg/l) concentration
of 50% or more of the desired operating range. If the present process water concentration has an oil
concentration in this range but the ppm value is unknown, a random value can be entered during the
calibration. A sample taken during this step can be tested by your lab and the value can be corrected
when known.
If process water with oil contamination is not available, a sample can be blended and pumped into the
unit or placed in the unit using the Test Tube Assembly supplied. See Section 9.0 for Sample
Preparation.
A factory turbidity calibration was performed prior to shipment. As a minimum, when running clean
turbid-free process water, a Zero Offset adjustment is required. For higher accuracy a full calibration
is recommended. The turbidity second calibration point requires a Formazin Standard blended to a
known NTU value within your desired range.
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 can affect the concentration reliability and repeatability.
8.1 BEFORE CALIBRATION
Open the sensor block by loosening the 4 thumb screws and remove the tube assembly. Check that
the quartz tube is in place. Check that all internal and external plumbing connections are secure. Keep
the tube assembly off the block by placing it on the hook in inner door.
Slowly open the process sample valve to allow a steady flow through the unit. Tilt the tube assembly
few times to release any trapped air. Shake or tap the metal assembly, not the tube, gently to release
any bubbles attached to the tube.
Check there are no bubbles in the flow. If there are bubbles in the flow, check for plumbing
connections that may be suctioning in air.
A back-pressure regulator is supplied on the outlet tubing if there are excessive bubbles due to rapid
pressure changes between the process inlet flow and the exit flow. This is a white thumbwheel on the
exit tubing. Tighten the thumbwheel slightly to compress the tubing and create back pressure to
eliminate bubble releases.

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Place the tube assembly back into the block. Be sure the block is the upright position according to the
labelling. Note: The sample tubing enters the chamber from the top right, circles around and flows up
into the block bottom. The sample tube exits the top of the block and circles out through the bottom
right side of the chamber. Tighten the 4 thumb screws. Close the chamber door.
Note: if bubbles occur increase flow rate and ensure that all fittings are tight (air locked). A
pressure/flow regulator is available to regulate the process and remove the occurrence of bubbles.
8.2 CALIBRATION
Press <CALIB> , enter the password at the prompt. To access the calibration settings, you will require a
password. The password is “2000”.
CALIBRATION Rx1
1.Auto 2.Manual
3.Zero Offset
4.Cal Pts 5.More *
8.2.1 Automatic Calibration <1>
Confirm that the desired receiver board is selected. See top right hand corner of display. Rx1 is for oil.
Press <1> for automatic calibration.
A U T O C A L R x 1
Cal point 1 of 2
ENTER=Do Cal Point 1
1=Abort
Automatic Calibration Oil Content (Rx1):
The 1st point must be clean process water (0.0 ppm). If the process water is not clean of oil (0.0 ppm),
open your clean water valve or pump clean water through the Hydrosense 4410-OCM. Press
<ENTER> to proceed to 1st calibration point. The first point is fixed to 0.0ppm. Once the mV reading
has stabilized press <ENTER> key. The display will now proceed to the second point. Press <ENTER>
to continue.
A concentration of contaminated water is required. If the process stream has a higher concentration
than 0 ppm, allow the process stream to flow through the Hydrosense 4410-OCM.
If the concentration of process stream is close to 0.0 ppm, a higher concentration prepared sample
(refer to Section 9.0) and a sample pump should be used. Disconnect the inlet of the clean water and
connect the prepared sample into the inlet. Pump the prepared sample through the Hydrosense
4410-OCM.
Enter the known or unknown* ppm value of stream concentration (i.e., 30.0 PPM). Once the reading
(mV) 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 at about the same time as pressing <Enter>. Send the sample for lab
analysis promptly. The laboratory ppm value will be entered in the manual calibration at a later date.
If more than 2 calibration points are entered in Section 8.2.4, the display will proceed to the 3rd point.
Repeat the above procedure for each concentration level. A minimum of two inputs are required.