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ARJAY ENGINEERING 2852-LT User Manual

Remote mounted level monitor
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2851 Brighton Road
Oakville (Toronto), Canada
L6H 6C9
MODELS:
2852-LT / 2851-LT
REMOTE MOUNTED
LEVEL MONITOR
USER MANUAL (REV: 3.4)
ARJAY ENGINEERINGLTD.
TEL: ++1 (905) 829-2418
FAX: ++1 (905) 829-4701
NORTH AMERICA: 1-800-387-9487
WEBSITE:
www.arjayeng.com
EMAIL:
arjay@arjayeng.com

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Summary of Contents for ARJAY ENGINEERING 2852-LT

  • Page 1 MODELS: 2852-LT / 2851-LT REMOTE MOUNTED LEVEL MONITOR USER MANUAL (REV: 3.4) ARJAY ENGINEERINGLTD. 2851 Brighton Road TEL: ++1 (905) 829-2418 WEBSITE: www.arjayeng.com Oakville (Toronto), Canada FAX: ++1 (905) 829-4701 EMAIL: arjay@arjayeng.com L6H 6C9 NORTH AMERICA: 1-800-387-9487...
  • Page 2 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 3: Table Of Contents

    10.0 FLOW CHARTS ....................26 TABLE OF FIGURES FIGURE 1 – TYPICAL INSTALLATION ................8 FIGURE 2 – PROBE INSTALLATION ................12 FIGURE 3 – CONTROLLER OVERVIEW ................13 2852-LT, 2851-LT Revision 3.4 P a g e 3 | 28...

  • Page 4: Specification

    -60 °C to +200 °C Standard or Heavy Duty Teflon Probe -60 °C to +100 °C Flexible Tefzel Probe Maximum Process Pressure 1500 PSI / 10342 kPa Relative humidity 0 to 95% (non-condensing) Altitude ≤2000 m 2852-LT, 2851-LT Revision 3.4 P a g e 4 | 28...
  • Page 5 (Zone 0, Div 1) for North Note: Must order Intrinsic Safety Barrier. Model: 28aaa-bbb-c-defg America, IECEx/ATEX * For ATEX / IECEx / CSA / UL and EU Declaration of Conformity certificates refer to www.arjayeng.com 2852-LT, 2851-LT Revision 3.4 P a g e 5 | 28...
  • Page 6 2 = Polycarbonate 2 = Amber 3 = 12 VDC (4X) Beacon 3 = Brushed 316SS 4 = 24 VDC 9 = other (4X) 2851 available for these models only. 2852-LT, 2851-LT Revision 3.4 P a g e 6 | 28...

  • Page 7: Use Hazard Information

    Indicates a potentially or imminently hazardous situation which, if not DANGER avoided, will result in death or serious injury. Indicates a situation which, if not avoided, may cause damage to the NOTICE instrument. Information that requires special emphasis. 2852-LT, 2851-LT Revision 3.4 P a g e 7 | 28...

  • Page 8: Instrument Overview

    Arjay processor will automatically extrapolate to determine the 0 to 100% span. The two relays (Model 2852-LT only) can alarm at different levels and are entered as a % value through the keypad and display. Each relay also has a differential setpoint to allow the relay to activate at one level and de-activate at a different level.

  • Page 9: Features

    Features • Microprocessor based RF capacitance level transmitter • Two Differential Alarm relays (SPDT, 3A @ 250VAC) - Model 2852-LT only • 0-20mA or 4-20mA field selectable output • Modbus protocol via RS-485 for access by Arjay handheld, Central Access Panel or compatible system •...

  • Page 10: Installation

    The Internal ground screw provided in this enclosure must be used for equipment grounding connection. CAUTION The External ground screw is provided for use only as a supplemental connection where required (or, permitted) by local codes or authorities. 2852-LT, 2851-LT Revision 3.4 P a g e 10 | 28...

  • Page 11: Probe Installation

    Install the probe with care. Teflon sheath is used to electrically isolate NOTICE the metal probe from the liquid. Damage causing leaks may cause reading errors. 2852-LT, 2851-LT Revision 3.4 P a g e 11 | 28...

  • Page 12: Figure 2 - Probe Installation

    Figure 2 – Probe Installation 2852-LT, 2851-LT Revision 3.4 P a g e 12 | 28...

  • Page 13: Controller Overview

    TB6 has two “+” connections. Either is acceptable. TB7 – Buzzer / Red Pilot Light Output (Optional) The connection will be factory wired if ordered. 2852-LT, 2851-LT Revision 3.4 P a g e 13 | 28...

  • Page 14: Input / Output Terminal Specification

    3A Contact Load Relay @250VAC 3A Contact Load Relay @250VAC - 18V,20mA, Ω Current Isolator(optional) 50mA@18V - 9V, 20mA, Ω Buzzer / Pilot Voltage None 24VDC, 30mA Light 2852-LT, 2851-LT Revision 3.4 P a g e 14 | 28...

  • Page 15: Permanent Power Connection (Ac Powered Models Only)

    Direct Current (DC) Power off Courant continu ArróÕ (mise hors tension) Normally closed relay contacts Live Contacts Repos Sous tension Power on Ground Marche (mise sous tension) Terre Neutral Neutre 2852-LT, 2851-LT Revision 3.4 P a g e 15 | 28...

  • Page 16: Startup And Calibration

    ^SP: Relay Setpoint Hi action ALRM CAL: Alarm Calibration vSP: Relay Setpoint Low action Cal: Calibration point Dir: Relay Action (Dir = Direct) Net ID Network Identification Fsafe: Failsafe 2852-LT, 2851-LT Revision 3.4 P a g e 16 | 28...

  • Page 17: Menu Description

    The mA output span may be set anywhere within the measurement range. Typically, the mA Span is set at the 100% level, but this span value can be changed to any required % level. 2852-LT, 2851-LT Revision 3.4 P a g e 17 | 28...

  • Page 18: Relay Setup Menu

    2. LOW ALARM (LoLv1) POINT. This value should be less than the High control point. Below this value, relay action is taken depending on the Relay Action and Failsafe settings. Factory Default is 20% for A1 and 60% for A2. 2852-LT, 2851-LT Revision 3.4 P a g e 18 | 28...
  • Page 19 In the alarm condition, the corresponding alarm LED is turned ON, and the relay is energized. Alarm condition set and reset as above. In the alarm condition, the corresponding alarm LED is turned ON, and the relay is de-energized. 2852-LT, 2851-LT Revision 3.4 P a g e 19 | 28...

  • Page 20: 285X Controller Calibration

    - Re-do the auto calibration according to the above steps 1 – 3. 3. If 1 or 2 are not the cause call Arjay Engineering Ltd.: Toll free: (800) 387-9487 (North America Only), tel. +1 (905) 829-2418. 6.4.2 Manual Calibration Manual Calibration allows you to override the values that have been set through the automatic calibration.

  • Page 21: Controller Network

    Parameter settings: 9600 Baud Rate; Even Parity, 8 Data Bits and 1 Stop Bit. Wiring connection: RS485 (+) connect to D+; RS485 (-) connect to D-. See section 7.2 for Modbus Register mapping. 2852-LT, 2851-LT Revision 3.4 P a g e 21 | 28...

  • Page 22: 2800 Series Modbus Register Mapping

    Temperature offset [mV at 0 dC] float Optional 40072 Temperature slope [mV per dC] float Optional 40074 Alarm 1 differential Off value float Optional 40076 Alarm 2 differential Off value float Optional 2852-LT, 2851-LT Revision 3.4 P a g e 22 | 28...

  • Page 23: Maintenance

    8.0 MAINTENANCE There is no routine cleaning required for this controller. 2852-LT, 2851-LT Revision 3.4 P a g e 23 | 28...

  • Page 24: Troubleshooting

    Cal point. 6. “NO SENSOR” • Capacitance reading is less than 5pF. • Verify that the blue probe wire is connected to “P” terminal plug of PMC2800 Probe input. 2852-LT, 2851-LT Revision 3.4 P a g e 24 | 28...
  • Page 25 ARJAY ENGINEERING TECHNICAL SUPPORT (800) 387-9487 +1 (905) 829-2418 www.arjayeng.com 2852-LT, 2851-LT Revision 3.4 P a g e 25 | 28...

  • Page 26: Flow Charts

    > key to increase / decrease the digital value. Press <SELECT> key to move the cursor. Note 2: Calibration information, it only shows about 2 seconds Note 3: See section 6.3.1 step 7 if password has changed. 2852-LT, 2851-LT Revision 3.4 P a g e 26 | 28...
  • Page 27 2852-LT, 2851-LT Revision 3.4 P a g e 27 | 28...
  • Page 28 2852-LT, 2851-LT Revision 3.4 P a g e 28 | 28...

This manual is also suitable for:

2851-lt

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