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

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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

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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

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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

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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

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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.

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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.

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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 – Buzzer / Red Pilot Light Output (Optional)
The connection will be factory wired if ordered.

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2.3.1 Input / Output Terminal Specification
Input Terminals – Power Source
Terminal
ID Overvoltage category Rated Voltage (V) Rated Current/power
(A/W/VA)
___ HZ or
DC Specified Mains
fluctuation
TB3 II 100-240V 150mA 50/60Hz
 10%
TB3 II 12 OR 24V 250mA DC
 15%
 10%
Input Terminals – Measuring Circuits
Terminal ID Function Measurement
Category Nominal a.c. or d.c line to
neutral voltage
/ if CAT I, Max.
transient
overvoltage Ut
Nominal
a.c. or d.c
current
Rating of
insulation
required for
external
circuit
TB6 Frequency I 15V,50mA / 0 -- DI * or RI**
TB4 RS485
Communicati
on
I 5V, 5mA / 0 -- DI * or RI**
* Double Insulation
**Reinforced Insulation
Output Terminals
Terminal ID Function Isolation or
protection Rated V, A Max. V, A Load type and nominal
TB1 Load Relay N.O. Contact
5A@250VAC &
N.C. Contact
3A@250VAC
-- --
TB2 Load Relay N.O. Contact
5A@250VAC &
N.C. Contact
3A@250VAC
-- --
TB5 Current Isolator(optional) - 18V,20mA,
900

- 9V, 20mA,
450

50mA@18V --
TB7 Voltage None 24VDC, 30mA -- Buzzer / Pilot
Light

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2.4 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)
L
Live
Sous tension
N
Neutral
Neutre
G
Ground
Terre

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3.0 STARTUP AND CALIBRATION
3.1 Startup
Check that the power wiring, PMC wiring and coaxial cable are wired in accordance with the
electrical installation drawing.
Power On the unit. Allow a 1 hour warm-up period before calibrating.
The Status LED on the controller circuit board should be green. A red Status LED indicates a
fault condition. If red, check the Troubleshooting section.
The unit is pre-configured and tested at the factory. However, a quick field calibration is
required after power up to tune the sensor to the installation and cable condition. See
section 3.3 to calibrate the 2852-DPM .
3.2 Menu Flow Chart Background Information
The control setup, diagnostics, and calibration are accessed using the display and keypad on
the controller. The Flow Chart in Section 7.0 provides an overview to the various menus and
features. Keep a copy of the flow chart at hand when accessing the internal controller features.
Below is a description of the menu functions.
3.2.1 Menu Description
Since the 2852 controller has a small LCD, some menu descriptions may be in short form. The
following are the menu descriptions:
Diags: Diagnostics
Cal Pts: Calibration points
Auto Cal: Auto calibrate
Man Cal: Manual calibrate
Cal Ok: Calibrate ok
Cal Err: Calibrate err
mA out: mA output
mA Span: mA output span
Sec: Seconds
ALRM CAL: Alarm Calibration
Cal: Calibration point
SENSTVTY: Sensitivity
A1: Alarm relay 1
A2: Alarm relay 2
Alrm: Alarm
Alrm Lvl: Alarm level
Diff Hi: Differential Hi alarm set value
Diff Lo: Differential Lo alarm set value
Alrm Del: Alarm Delay
^SP: Relay Setpoint Hi action
vSP: Relay Setpoint Low action
3.2.2 Menu Flow Chart
The 2852 controller will display Normal in its normal operating condition and Alarm during an
dry sensor condition.
From the main menu, you can select Cal Only, View, and Change.
Cal Only allows a user to calibrate after the equipment is installed. The calibration is required
at site after power up or anytime a component or sensor is changed out. A password is
required to enter this and is described in the calibration section.
View allows an operator to view the Calibration setpoints in pF, the Alarms settings (2852
only) such as low or high action, failsafe or non-failsafe and the 0-600 second delay, the
Diagnostics of raw readings and the Setup values such as mA output and ID address. This
can be viewed without a password and without risk of changing any values. This information
may be requested during technical assistance inquiries.

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Change is password protected and allows an operator to enter or change the configuration set-
up values indicated in the View. Changes will be required for the initial setup of relay setpoints,
delays, span etc. or to re-set the values to the factory default.
3.2.3 Data Entry
3.3 2852 Controller Calibration
Power up the 2852 Controller. The status LED should be green. The LCD will scroll to the
normal operating screen after a series of the following screens (each display for 2 sec.). It may
read Normal or Alarm until a calibration is performed.
3.3.1 Site Calibration
A factory pre-configuration and set-up has been defaulted into the 2852-DPM. As such, a user
set-up is not required in the field. A basic calibration is only required.
For the initial calibration, ensure that the pipe is full of liquid. For Liquid to Liquid applications,
the highest di-electric liquid should be in the pipe during calibration.
As per the Flow Chart, press and hold Menu key for 5 seconds to enter the main menu. The
display will read the first menu item Cal only. Press select key, enter password ¨2000¨. A pF
reading of the sensor will be displayed. Press select to acknowledge and then press select to
accept the new calibration. To abort, press the MENU key.
If the calibration is successful, the display will return to the main operating display.
To verify the sensor and electronics are responsive, force a condition that will drain the fluid
within the flange sensor.
The Alarm1 and Alarm2 LEDs on the circuit will activate red. Re-fill the pipe to clear the alarm.
THIS COMPLETES THE SETUP AND CALIBRATION PROCEDURE FOR THE
2852-DPM Dry Pump Monitor
Arjay
2800
S XXXXXX
PMC= EXT
SW X.XXX
HW X.X
DPM
Normal
Normal Screen
NET ID: X

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4.0 SETUP AND ALARMS
4.1 2852 Controller Setup
The 2852 controller has the following Setup parameters:
1. Sensitivity
The sensitivity determines the amount of pF change required to cause an alarm. The
factory default setting is 1.0 pF. This is the factory recommended sensitivity for typical Dry
Pump applications. If more sensitivity is required, the adjustment can be changed in the
CHANGE MENU by decreasing the pF reading e.g. 0.5pF. Increasing the pF value will
increase the amount of liquid loss to required cause an alarm. Since different liquid types
can affect the pF change, a direct pF to liquid loss relationship cannot be factory
determined. If this setting is changed in the field, it should be tested to confirm an alarm.
2. Alarm Calibration above or below setpoint
This setting advises the controller if the calibrated pF value is above or below the alarm
setpoint. For the DPM, the calibration pF value is above the setpoint because the unit is
required to alarm at a lower pF value, which indicates oil. The factory default is Above
Setpoint.
3. Defaults
Factory settings are pre-configured into the unit based on the most typical set-up required
for this application. This provides for a quick and easy calibration at site but can be
changed for special applications. If the setup has been changed, this will change back to the
factory defaults.
4. Net ID
The ID number is used only for network applications. To communicate on a network, each
controller must have a unique ID number. The factory default ID number is 1.
Important: If multiple units on a network have the same address, network errors will result.
5. Filter
Data filtering is used to smooth data from a sudden change and minimize fluctuating
readings. For example, a 5 second setting means the calculated value of the capacitance
and resulting values of pF will start to respond immediately but will take 5 seconds to reach
their final values. The factory default is 0 to provide an immediate and active response.
4.2 2852 Controller Alarms
The two relays on the 2852-DPM operate together. The follow parameters are available as a
common setting to the two relays:
1. Delay. Minimum time in seconds for an alarm to exist before the relays change to an alarm
state. The relay alarm state depends on the Relay Action and Failsafe settings. The factory
setting is 10 seconds. to suppress false alarms due to bubbles or disturbances in front of
the sensor.
2. Action. This determines if the Alarms LEDs should activate when the pF reading rises
above or below the setpoint. The factory default is below the setpoint because the
application of water to oil is a decrease in capacitance.
3. Failsafe. 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

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is that the alarm condition should match the Power Fail condition. The factory default is
Yes for Failsafe.
4.3 2852 Controller Network
The 2852 Controller may be monitored and calibrated via RS-485 protocol compatible digital
communications.
Typical features are:
1. Ease of wiring in multiple level point monitoring:
Up to 255 Model 2852's (or other Arjay 2800 Series level monitors) may be connected together
in a daisy chain (2 wire communication plus power wiring) connection to an Arjay Remote
Access monitor or customer control system which allows viewing data and setup of any of the
transmitters on the network. The relay and analog outputs may still be used if necessary.
2. Setup for the 2852 for network operation:
Each 2852 transmitter must have a unique ID number to connect in a network system.
4.3.1 Modbus Configuration
Parameter settings: 9600 Baud Rate; Even Parity, 8 Data Bits and 1 Stop Bit.
Wiring connection: RS485 (+) connect to D+; RS485 (-) connect to D-

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4.3.2 2800 Series Modbus Register Mapping
REG Zero Based DESCRIPTION TYPE
No. of
Reg
40001 0 Serial Number float 2
40003 2 Hardware Rev / Software Rev byte 1
40004 3 Sensitivity / Mode byte 1
40005 4 Instrument Status int 1
40006 5 Model / Modbus Address byte 1
40007 6 Relay2 Setup / Relay 1 Setup byte 1
40008 7 Password int 1
40009 8 XA "A" cal parameter float 2
40011 10 XK "K" cal parameter float 2
40013 12 XC "C" cal parameter float 2
40015 14 Filter float 2
40017 16 Slope – pF per % level float 2
40019 18 Offset – pF for empty vessel float 2
40021 20 mA output span value float 2
40023 22 mA output Zero value float 2
40025 24 mA output Trim Slope value float 2
40027 26 mA output Trim Offset vlaue float 2
40029 28 Cal1 PV: 1st calibration point level value in % float 2
40031 30 Cal2 PV: 2nd calibration point level value in % float 2
40033 32 Cal1 pF: 1st calibration point capacitance value in pF float 2
40035 34 Cal2 pF: 2nd calibration point capacitance value in pF float 2
40037 36
Relay 1 : Differential High Alarm [% Level]. Only used for
Linear Level type. Not used for Single Point Alarm application float 2
40039 38
Relay 2: Differential High Alarm [% Level]. Only used for
Linear Level type. Not used for Single Point Alarm application float 2
40041 40
Relay 1: Differential Low Alarm [% Level] OR Single Point
Alarm [pF]. Single Point Cal: used as captured pF during cal float 2
40043 42
Relay 2: Differential Low Alarm [%Level]. Only used for Linear
Level type. Not used for Single Point Alarm application float 2
40045 44
Relay 1 On delay [in seconds]. Only used for Linear Level or
Single Point Alarm application int 1
40046 45
Relay 2 On delay [ in seconds]. Only used for Linear Level
type. Not used for Single Point Alarm application int 1
40047 46 mA Analog Output float 2
40049 48 Oscillation Frequency float 2
40051 50 Frequency float 2
40053 52 Capacitance float 2
40055 54 Filtered Capacitance float 2
40057 56 Level float 2

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5.0 MAINTENANCE
There is no routine cleaning required for this controller.

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6.0 TROUBLESHOOTING
CONDITION DO THIS
1. Status LED is OFF and the LCD
display if off
Check the power to the unit. If the unit is a 12VDC or 24VDC
model, check the external source and polarity is correct. If the
unit is a 100-240VAC model, then check the Line, Neutral and
Ground wiring is correct.
2. If the status LED is RED This indicates a major error such as memory failure, no sensor
signal etc. Check the following:
Make sure the PMC is installed
Make sure the PMC wiring is correct and there are no
breaks in the wiring. At the controller, measure across the
Probe Input terminals with a DC meter. Make sure
“Common” lead of meter is on ‘-‘ terminal. It should read
(+) 8 to (+)10 VDC with the PMC connected and
approximately 20 to 24 VDC with the PMC terminal
disconnected.
Microprocessor may have lost its parameters due to a
surge in the line. Go to Diagnostic Menu (see Flow Chart)
to check the Calibration values, frequency and capacitance
values
Call Arjay Technical Support.
3. No mA output OR incorrect mA
output.
IMPORTANT: THE UNIT SOURCES mA OUT FROM
THE mA OUTPUT TERMINAL. THIS TERMINAL
SHOULD NOT BE CONNECTED TO +24V. IT IS NOT A
2 WIRE mA TRANSMITTER. See Figure 4 for Electrical
hookup details.
Disconnect external wires from mA output and measure
with mA Meter.
Check the mA output Action (direct or inverse) and mA
output Span are set as desired. See section 7.0 Flow
chart / Change menu.
If the mA output still does not match the level, then call
Arjay Technical Support.
4. False Alarms

Add some time delay in the unit
Make sure there is no external interference and electrical
noise such as agitators, high voltage interference, turbulent
flow, etc
Adjust the sensitivity to the next higher value. Test after
any changes to confirm an alarm.
5. Not sensitive to change

Make sure that there is a liquid change at sensor location.
Increase sensitivity by adjusting capacitance to a lower
value (e.g. 0.5pF).
ARJAY ENGINEERING TECHNICAL SUPPORT
[phone]
[phone]
www.arjayeng.com