ARJAY ENGINEERING 2852-LPS User manual

MODEL 2852-LPS WITH S00445C LEAK SENSOR
Area Leak Alarm
User Manual
Technical Support
Continental North America Toll Free 1-[phone]
Ph: [phone] Fx: [phone]
A Product of Arjay Engineering Ltd.
Oakville, Ontario, Canada
www.ArjayEng.com
MODEL:
HARDWARE NO.: 5.1
SOFTWARE NO.:
SERIAL NO.:

Area Leak Alarm
ver 40 years of capacitance experience stands behind the
2852-LPS leak alarm. The sensors continuously monitor for the
accumulation of liquid in a normally dry condition.
• capacitance technology alarms on any liquid
• no moving parts
• remote alarm unit mounts safely away from monitoring area
• available for hazardous rated locations
The 2852-LPS sensor monitors the capacitance field between
the sensor pad and the floor. A single push button calibration
at the controller locks in on the capacitance field of all sensing
pads. Any liquid that intrudes into the pad space will increase
the capacitive field and initiate an alarm.
Reliable monitoring of liquid leaks in containments and floor spaces
2852-LPS
6 meters of co-axial cable
ptional Intrinsically Safe Sensor
sensing puck
explosion proof rigid
probe styles are available
•tank and room leaks
•ndergro nd va lts
•s b floors
•valve and p mp pans
Remote Electronics available
in painted steel, SS or
polycarbonate enclosure
ENGINEERING
optional alarm light
and/or buzzer

Arjay Engineering Ltd. 2851 Br ghton Road Oakv lle, Ontar o Canada L6H 6C9
http://www.arjayeng.com telephone: ++1 905-829-2418 N. Amer ca toll free: 1-800-387-9487 fax: ++1 905-829-4701
ENGINEERING
2852-LPS-12b
• sensor pads can be placed in key locations
and tight spaces
• up to 3 sensor pads can connect to one
control unit
• adjustable time delay and sensitivity to
eliminate nuisance alarms
• remote electronics via standard twisted pair
• sensor available Intrinsically Safe for
Hazardous Locations
• high grade epoxy and PVC wetted parts
allow for corrosive environments
• capacitance technology responds to all
types of liquids
Technical Specifications - Control Unit
perating Temp. -20˚C to +55˚C
Resolution .007% (.07 pF at 1,000 pF)
Accuracy .04% of full scale pF
Power Input 12 vdc or 24 vdc or 100-240 vac +/-10%
Alarm Relay 2 x 10 amp@240 vac, SPDT, dry
Analog utput 4 mA normal/20 mA alarm
Communication Modbus RS-485
Certified UL 61010-1, 2ndEdition
CAN/CSA-22.2 61010-1-4
IEC/EN 61010-1, 2ndEdition
IEC 61326-1
CE Declared
Enclosure Type 4 / IP 66 painted steel
or Type 4X / IP 66 polycarbonate or SS
ptional Light, buzzer, beacon
Technical Specifications - Sensing Pads
perating Temp. -60˚C to +55˚C
Intrinsic Safety CSA Intrinsically Safe when ordered with
Approved Barrier in Control Unit
Div 1, Class I, Groups A,B,C,D;
Class II, Groups E,F,G;
Class III, Encl. Type 4
Wetted Parts High grade marine epoxy and PVC
(optional PVDF/TFE).
Sensor materials are eligible for NACE MR-0175 Compliance
2852-LPS
Feat res and Benefits
The unique PMC circuit design, installed at the probe and
exclusive to Arjay, immediately converts the sensor signal to
a frequency pulse for furtherance to the controller.
Alarm and Status LCD display of alarm
status and menus
RS-485 Modbus user interface
4 mA normal/20 mA alarm output
Probe
input
Power
input
Relays
up to 1 km

Model: 2852-LPS User Manual Rev: 0.0
2
TABLE OF CONTENTS

1.0INSTRUMENT OVERVIEW ............................................................................................3
1.1Features .............................................................................................................3
1.2Model Number vs. Voltage Input........................................................................3
1.3Specifications .....................................................................................................4
2.0INSTALLATION...............................................................................................................6
2.1Controller Installation .........................................................................................6
2.1.1Permanent Power Connection (AC Powered Models only) ................6
2.2Sensor Installation (Probe Style) .......................................................................7
2.3Electrical Installation ..........................................................................................8
2.3.1Input / Output Terminal Specification ..................................................9
2.4Glossary of Symbols ..........................................................................................10
3.0STARTUP AND CALIBRATION......................................................................................11
3.1Startup................................................................................................................11
3.2Menu Flow Chart Background Information ........................................................11
3.2.1Menu Description.................................................................................11
3.2.2Menu Flow Chart .................................................................................11
3.2.3Data Entry............................................................................................12
3.32852 Controller Calibration ................................................................................12
3.3.1Site Calibration ....................................................................................12
4.0SETUP, ALARMS and DIAGNOSTICS .........................................................................13
4.12852 Controller Setup ........................................................................................13
4.22852 Controller Alarms ......................................................................................13
4.32852 Controller Diagnostics...............................................................................14
4.42852 Controller Network ....................................................................................14
4.4.1Modbus Configuration .........................................................................14
4.4.22800 Series Modbus Register Mapping ..............................................15
5.0MAINTENANCE ..............................................................................................................16
6.0TROUBLESHOOTING....................................................................................................17
7.0FLOW CHARTS ..............................................................................................................18
TABLE OF FIGURES
Figure 1 – Electrical Installation Overview ....................................................................................8

Model: 2852-LPS User Manual Rev: 0.0
3
1.0 INSTRUMENT OVERVIEW
The Arjay Area Leak Alarm provides a means for detecting liquid spills and leaks in containment
bunkers, equipment pans, equipment rooms, sub-floors, or anywhere the presence of a liquid
should be alarmed. The leak probe design allows the sensor to monitor for low dielectric materials
such as diesel, oils etc while maintaining a stable reading during possible shifts in temperature.
The sensing assembly contains a capacitance probe that monitors the air to floor space below and
around the probe. Air has a low dielectric constant, which results in a low capacitance reading.
When a liquid submerges the sensing probe, the capacitive field increases and triggers the alarm.
The system can be sensitized to very low dielectric liquids such as diesel.
The complete 2852-LPS system has two options:
Option 1: Part# S00455A comes with one controller, one PMC 2800TMP and one leak sensor
(S00455C).
Option 2: Part# S00455B comes with two controller, two PMC 2800TMP and two leak sensor
(S00455C).
The capacitance leak sensors are constructed of chemical resistant Teflon, 304/316 stainless steel.
A PMC 2800TMP card is mounted in the sensor junction box which translates the capacitance
signal from the sensor into a frequency pulse, which can then be transmitted back to the 2852
controller via 3-wire shielded cable (50ft of cable supplied with each sensor). There is a built-in
temperature sensor in the PMC 2800TMP which helps compensate for any change in capacitance
due to temperature changes.
The model is intended for use in General Purpose non-hazardous areas. For hazardous location
use refer to Arjay Engineering Ltd. for appropriate model.
1.1 Features
Microprocessor based capacitance Controller
Relay and 4/20mA alarm output
Modbus protocol via RS-485 for access by Arjay handheld, Central Access Panel or
compatible system
Local Auto calibration or remote calibration via network
User specified custom features may be added by contacting Arjay Engineering Ltd.
1.2 Model Number vs. Voltage Input
2852-LPS-1-X 100-240 VAC power input
2852-LPS-3-X 12 VDC power input
2852-LPS-4-X 24 VDC power input
Where “X” = Temperature Comp. circuit.

Model: 2852-LPS User Manual Rev: 0.0
4
1.3 Specifications
Power Input: 12 VDC +15% /-10% or 24 VDC +15% /-10%, 250mA maximum
100VAC – 240VAC +/- 10%, 50/60 Hz, 150mA maximum
Note: DC input models must be supplied by Limited Energy power source.
Limited Energy means compliance with one of the following requirements:
- Class 2 circuit according to Canadian Electrical Code, Part, I, C22.1;
- Class 2 circuit according to National Electrical Code, NFPA-70;
- Limited Power Supply (LPS) according to IEC 60950-1;
- Limited-energy circuit according to IEC 61010-1.
Connections to mains supply Permanent (for AC/DC model)
User Interface:
Display & Keypad
Two line LCD with display of Alarm Status, select menu or enter
values by keypad (display is internal to housing and used for
set-up and diagnostics only)
Communication Interface: Modbus (RS485)
Analog /Relay Outputs:
mA Signal Output 4 mA during Normal and 20 mA during an alarm condition, 900
Ohms max OR 450 Ohms max (12VDC Power)
Relay Output
2 SPDT relay, dry, N.O. Contact 5 A @ 250 VAC (Resistive) and
N.C. Contact 3 A @ 250VAC (Resistive), selectable failsafe or
non-failsafe, selectable high or low acting alarm, programmable
time delay: 0 – 600 seconds
Instrument Performance:
Setpoint Range of S00455C
Sensing Probe
6mm – 14mm of surface liquid (Dependent on dielectric of
material)
Measuring Range 0 - 5000 pF (most applications are 100pF to 1000pF)
Accuracy 0.2% of setpoint
Resolution 0.05% of setpoint via network display
0.002% of Full Scale capacitance via network display
Calibration Single point: Auto calibration
Environmental:
Operating conditions Continuous
Operating Temperature
-20 °C to +55 °C 2852-LPS controller
-60 °C to +55 °C PMC 2800TMP
-60 °C to +260 °C Sensor Probe (S00445C)
Relative humidity 0 to 95% (non-condensing)
Altitude ≤2000 m

Model: 2852-LPS User Manual Rev: 0.0
5
Installation Category II
Pollution Degree 2
Equipment mobility Fixed
Mechanical Specification: Refer to Dimensional Drawing
Enclosure Rating Type 4 / IP65 Painted Steel
Type 4x / IP66 Polycarbonate
Type 4x / IP66 316 Stainless Steel
Options on Enclosure Buzzer
Pilot Light OR Strobe/Beacon
Custom alarms
Approval Standards:
UL / IEC 61010-1, 2nd Edition, 2005-07-22 (Electrical
Equipment for Measurement, Control, and Laboratory Use;
Part 1: General Requirements)
UL file number: E343390
CAN/CSA-22.2 No. 61010-1, 2nd Edition, 2004-07,
(Electrical Equipment for Measurement, Control, and
Laboratory Use; Part 1: General Requirements)
CE: UL / IEC 61010-1; IEC / EN 61000-4; ISO 9001:2008

Model: 2852-LPS User Manual Rev: 0.0
6
2.0 INSTALLATION
NOTE: If any damage to the instrument is found, please notify an Arjay Engineering
representative as soon as possible prior to installation.
2.1 Controller Installation
Choose the mounting location in accordance with good instrument practice. Main controller should
be mounted above any possible flood area. Extremes of ambient temperature and vibration should
be avoided (see specifications and installation drawing).
The 2850 controller may be mounted up to one kilometer from the PMC 2800TMP card (mounted
in sensor junction box) using a minimum 20 gauge, 3-wire SHIELDED cable (Belden 8772 or
Equivalent). 50ft of cable is supplied with each sensor.
Check the polarity of the + and - wiring between the controller and the PMC prior to powering on
the unit; + to + and - to - to avoid damage. Ensure that the temperature wire (Marked “T”) is
connected at the controller temperature connector. Shield of cable should be connected to
secondary ground terminal marked as at controller only (Dead end shield at PMC junction
box). Incoming Earth ground should be connected to primary ground terminal marked on sub
plate.
Important Note: The controller is factory set in a Failsafe mode. This means that the relays
are in an energized state during normal operation. The N.O. relay contact will be held closed and
the N.C. relay contact will be held open during a normal condition. This will allow the relay to return
to its non-energized (shelf) state during an alarm, fault or power failure condition. Wire
accordingly.
Note: Maximum Conduit size for installation size is ¾” FNPT.
2.1.1 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) A disconnecting device is required. The disconnecting means shall disconnect all
current-carrying conductors.
3) 15A circuit breaker or equivalent fuse is required.
4) 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:
5) The wiring for AC power should be minimum 18 AWG / 300V or as required by local /
country codes.
6) After field wiring, the primary wires must be secured to the enclosure by tie-wraps to
maintain the separation from the signal wires.
7) Wiring diagram for permanent connection: See drawings at the back of this manual.
8) Use copper conductors only.
Power Off Power On

Model: 2852-LPS User Manual Rev: 0.0
7
2.2 Sensor Installation (Probe Style)
Sensors should be mounted in a containment area OR at the lowest elevation in the area so
that the liquid can pool around the sensor.
Once installed, wire each sensor back to the main controller using the 50ft of 3 wire cable
supplied. See electrical detail drawing in back of this manual.
NOTES:
The sensors are not for mounting outdoors or in locations where rain or liquid
splashing may cause nuisance alarms.
To ensure proper operation and electrical safety, make sure the 2852 enclosure and
the PMC junction box are electrically grounded.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.

Model: 2852-LPS User Manual Rev: 0.0
8
2.3 Electrical Installation
Figure 1 – Electrical Installation Overview
TB1/TB2 - Relay Output
2 SPDT relay, Dry, N.O. Contact 5A @ 250 VAC (Resistive) and N.C. Contact 3A @
250VAC (Resistive), selectable failsafe or non-failsafe, selectable high or low acting alarm,
programmable time delay: 0 – 600 seconds
TB3 - Power Input
Power input as per Model. Check if ordered AC or DC. . Earth ground is connected to G.
TB4 - Network Output
Connect RS485 + and – to the network D+ and D-.
TB5 - 4/20 mA Output (+ and -)
The 4/20 mA is a sourced output referenced to Ground. It is not loop powered.
4mA = Normal 20mA = Alarm
TB6 - Probe Input
Connect ‘+’ to ‘+’ , ‘-‘ to ‘-‘ between the controller and the PMC card. Check polarity to avoid
damage.
TB7 – Temperature Compensation