ARJAY ENGINEERING 2852-DPM User manual

MODEL 2852-DPM
Dry Pump Monitor
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.:

Dry Pump Monitor
Pipe monitoring for dry conditions to protect pumps and equipment
2852-DPM
Over 40 years of capacitance experience stands behind the
2852-DPM pipe monitor. The unique in-line sensor
continuously monitors for the change from a wet to dry
condition or a liquid change from one dielectric to another.
• capacitance technology responds to any liquid type
• no moving parts
• remote alarm unit mounts safely away from pipe
• no intrusion into stream flow
The 2852-DPM sensor monitors a cross
sectional area of the pipe and locks in on
the capacitance field of the fluid passing
through. A change toward a dry condition
or a liquid of a different dielectric will upset
the capacitive field and initiate an alarm.
The sensing plates are embedded into a
wafer flange which provides monitoring
without any intrusion into the stream flow.
Optional Intrinsically
Safe Sensor
PVC sensing flange
(150# Ansi configuration)
Remote Electronics available
in painted steel, SS or
polycarbonate enclosure
up to 1 km
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-DPM-12b
• wafer flange sensor for easy installation
• adjustable time delay and sensitivity to
eliminate nuisance alarms from bubbles
• remote electronics via standard twisted pair
• Sensor available Intrinsically Safe for
Hazardous Locations
• PVC wetted parts for corrosive
environments
• capacitance technology responds to all
types of liquids
• non-intrusive sensor design does not
restrict flow
Technical Specifications - Control Unit
Operating 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 Output 4 mA normal/20 mA alarm
Communication Modbus RS-485
Certified UL 61010-1, 2ndEdition
CA /CSA-22.2 61010-1-4
IEC/E 61010-1, 2ndEdition
IEC 61326-1
CE Declared
Enclosure Type 4 / IP 66 painted steel or
Type 4X / IP 66 polycarbonate or SS
Optional Light, buzzer, beacon
Technical Specifications - Sensor
Operating 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 PVC (optional PVDF)
2852-DPM
Features 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-DPM User Manual Rev: 2.1
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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..............................................................................................7
2.2.1Installation Tip .....................................................................................7
2.3Electrical Installation ..........................................................................................9
2.3.1Input / Output Terminal Specification ..................................................10
2.4Glossary of Symbols ..........................................................................................11
3.0STARTUP AND CALIBRATION......................................................................................12
3.1Startup................................................................................................................12
3.2Menu Flow Chart Background Information ........................................................12
3.2.1Menu Description.................................................................................12
3.2.2Menu Flow Chart .................................................................................12
3.2.3Data Entry............................................................................................13
3.32852 Controller Calibration ................................................................................13
3.3.1Site Calibration ....................................................................................13
4.0SETUP and ALARMS .....................................................................................................14
4.12852 Controller Setup ........................................................................................14
4.22852 Controller Alarms ......................................................................................14
4.32852 Controller Network ....................................................................................15
4.3.1Modbus Configuration .........................................................................15
4.3.22800 Series Modbus Register Mapping ..............................................16
5.0MAINTENANCE ..............................................................................................................17
6.0TROUBLESHOOTING....................................................................................................18
7.0FLOW CHARTS ..............................................................................................................19
TABLE OF FIGURES
Figure 1 – Electrical Installation Overview ....................................................................................9

Model: 2852-DPM User Manual Rev: 2.1
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1.0 INSTRUMENT OVERVIEW
The Arjay Dry Pump Monitor provides a means for alarm and control when the fluid in a pipe
changes from a liquid phase to a dry phase or changes from one liquid type to another (such as
water to oil).
The Arjay flanged sensor design contains a capacitance sensor that monitors across the pipe.
Water has a high dielectric constant, which results in a high capacitance reading. The capacitance
reading decreases when air or a liquid of lower dielectric replaces the water.
The remote mounted Arjay 2852 controller monitors the capacitance change of the sensor and
activates a relay contact for use with alarms, pumps, valves, etc.
The complete 2852-DPM system consists of the flange sensor, the PMC card at the sensor, and
the 2852 controller.
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-DPM-1 100-240 VAC power input
2852-DPM-3 12 VDC power input
2852-DPM-4 24 VDC power input

Model: 2852-DPM User Manual Rev: 2.1
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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 Alarm status display, 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 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
Instrument Performance:
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 controller
-60 °C to +55 °C PMC
-60 °C to +55 °C Sensor
Relative humidity 0 to 95% (non-condensing)
Altitude ≤2000 m
Installation Category II
Pollution Degree 2
Equipment mobility Fixed

Model: 2852-DPM User Manual Rev: 2.1
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Mechanical Specification: Refer to Dimensional Drawing
Enclosure Rating Type 4 / IP65 Painted Steel (Blue)
Type 4x / IP66 Polycarbonate (Gray)
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-DPM User Manual Rev: 2.1
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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. 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 card using a minimum 18
gauge, 2-wire SHIELDED cable.
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. Shield of cable should be connected to secondary
ground terminal marked as . 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 OnPower Off

Model: 2852-DPM User Manual Rev: 2.1
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2.2 Sensor Installation
The flange sensor is constructed of PVC and machined in accordance with ANSI/ISO 150# bolt
hole configurations. Where specialty piping is used (ie. Victaulic), mount the sensor ONLY in
accordance with manufacturers specifications.
The sensor can be mounted on a horizontal or vertical pipe. Choose a location that will provide a
good change from a liquid to a dry condition (or liquid to liquid) when the alarm is desired. The inlet
to a pump is typical. If the sensor is installed on the downstream side of pump, be sure the liquid
drains if the pumps fails to receive water. The sensor operates on the presence and absence of
liquid within the flange area.
On a horizontal pipe, orientate the PMC junction box to be at the 12 o’clock position.
2.2.1 Installation Tip
Once the two mating flanges are joined to the pipe, the method for joining three flanges together
is as follows:
1. Make sure that all the bolt holes of the matching flanges match up.
2. Insert all bolts
3. Make sure that the faces of the mating flanges are not separated by excessive distance
prior to bolting down the flanges. Make sure the bolt holes align with mating flanges.
4. The bolts on the plastic flanges should be tightened by pulling down the nuts
diametrically opposite each other using a torque wrench. Complete tightening should be
accomplished in stages and the final torque values in the following table should be
followed for the various sizes of flanges. Uniform stress across the flange will eliminate
leaky gaskets.
*Based on using flat faced PVC flanges, a full face neoprene gasket, well lubricated hardware, tightening in
the proper pattern and applying torque in small increments. For raised face flange assemblies, and PVC to
metal flange (or other materials) the above torque recommendations may vary.
The sensor junction box is potted to the ring sensor. DO NOT attempt to re-align the sensor
junction box as this will break the potted wiring and render the unit inoperable.

Model: 2852-DPM User Manual Rev: 2.1
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FLANGE SIZE (INCHES) RECOMMENDED TORQUE
(FT.LBS)*
½ - 1 ½ 15
2 – 4 30
6 – 8 50
10 70
12 – 24 100
NOTE:
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.