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PRINCO L2000 Instruction Manual

Point level controller with null-kote™
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Instrumentation designed
with the user in mind
INSTRUCTION MANUAL
PRINCO MODEL L2000
POINT LEVEL CONTROLLER
with NULL-KOTE™
PRINCO INSTRUMENTS INC.
1020 INDUSTRIAL BLVD.
SOUTHAMPTON, PA 18966
TEL: 800-221-9237, 215-355-1500
FAX: 215-355-7766
WEB SITE: www.princoinstruments.com
E-MAIL: info@princoinstruments.com
Rev 1, 12 Nov 01

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Summary of Contents for PRINCO L2000

  • Page 1 Instrumentation designed with the user in mind INSTRUCTION MANUAL PRINCO MODEL L2000 POINT LEVEL CONTROLLER with NULL-KOTE™ PRINCO INSTRUMENTS INC. 1020 INDUSTRIAL BLVD. SOUTHAMPTON, PA 18966 TEL: 800-221-9237, 215-355-1500 FAX: 215-355-7766 WEB SITE: www.princoinstruments.com E-MAIL: info@princoinstruments.com Rev 1, 12 Nov 01...

  • Page 2: Table Of Contents

    Figure 3-3. Electrical Connections, 115 Vac and 230 Vac Units Figure 3-4. Electrical Connections, 24 Vdc Unit Figure 3-5. Ground Continuity Test Figure 4-1. L2000 Adjustment and Indicator Locations Figure 4-2. Conductive Process Calibration Procedure Figure 4-3. Non-Conductive Process Calibration Procedure...

  • Page 3: Section 1. Description

    Description A. General Description The Princo Model L2000 is a low-cost, adjustable, RF Impedance point level controller. It may be used, in conjunction with any Princo L840 Series Sensor Probe, to detect the presence or absence of process material within a storage vessel.
  • Page 4 Heavy Duty Control Relay Two sets of Form C (DPDT) contacts are provided via a terminal block located on the top printed circuit board of the L2000. The contacts are rated at 10 amps at 115 Vac. • Probe Status Indicator The status of the process material at the sensor probe is indicated by the color of the PROBE STATUS LED.

  • Page 5: L840 Series Probe Description

    The guard contact is made by means of a ½ inch diameter sp r ing which projects from the bottom of the L2000 bottom circuit board. This spring fits concentrically around the spring-loaded pin and touches the guard contact on the probe.
  • Page 6 Section One Description tank applications. The L844 has a ¾ inch diameter stainless steel tube concentrically surrounding the standard active/guard rod. The tube itself serves as the ground element. Probes are available in custom guard lengths and overall lengths, above and below the standard lengths.

  • Page 7: Section 2. Specifications

    Section Two Specifications A. Specifications 1. L2000 LEVEL CONTROLLER • TYPE Point type (on/off), solid state electronic, high frequency (RF), impedance sensing, level controller. • POWER REQUIREMENTS 95 to 135 Vac, 50 to 60Hz, 1.3 watts; or 205 to 250 Vac, 1.3 watts; or 17/34 Vdc, <1 Watt.
  • Page 8 Section Two Specifications • PRESSURE / TEMPERATURE RATINGS TEMP °F 1000 -300 1000 • WETTED SURFACES Teflon and 316 Stainless Steel are standard. Probes fully sheathed in Teflon or Kynar are also available. • VESSEL CONNECTION SIZE 3/4" NPT. • PHYSICAL DIMENSIONS Refer to Figure 1-2.

  • Page 9: Section 3. Installation

    6 to 8 inches from it. The ground return rod must be electrically connected to the L2000 housing or to the ground position of the terminal block with 18 AWG or heavier wire. See Figure 3-3 & 3-4. See Figure 3-5 for ground continuity testing.
  • Page 10 Section Three Installation A vertically installed probe in a non-conductive process material, may require up to six inches of probe immersion before a stable trip point is reached. In horizontal mount applications, it is recommended that the probe be mounted at a shallow downward angle (not critical) off the horizontal axis for optimum process liquid drainage (refer to Figure 3-1).

  • Page 11: Electrical Connections

    Extended Guard Installation D. Electrical Connections Remove the lid of the L2000 electronic housing in preparation for connection of input and output wires. Before drawing wires into the equipment housing, it may be necessary to remove the electronic chassis. To do so, unfasten the two 8-32 mounting screws which are located on either side of the electronic chassis.
  • Page 12 Section Three Installation NOTE The two 8-32 mounting screws MUST be fastened securely. These two screws provide the ground connection to the printed circuit board electronics. If not fastened securely, faulty equipment operation may occur. Verify that all connections were made correctly. Figure 3-3 Electrical Connections, 115 Vac and 230 Vac Units Figure 3-4...

  • Page 13: Installation In Hazardous Areas

    Section Three Installation E. Installation in Hazardous Areas The outline which follows points out some of the major requirements of the NEC's (National Electric Code) Section 501, as it relates to typical level control installations. WARNING ! For applications which MUST BE explosion-proof and/or weatherproof, it is the customer's responsibility to install the required conduit, seals, wiring, etc., which meet national, as well as applicable local and plant safety codes.

  • Page 14: Section 4. Adjustments And Operation

    To make adjustments under simulated conditions, perform the following outlined procedure by raising and lowering the L2000, with attached probe, into and out of a small metallic vessel filled with the conductive process material. Perform the procedure making certain that nothing but the process material, contacts the probe.
  • Page 15 Section Four Adjustments and Operation 1. ADJUSTMENT PROCEDURE - Conductive Process Materials a) Refer to Figure 4-1 for adjustment and indicator locations. Refer to Figure 4-2 for a pictorial outline of this procedure. b) Perform Section 4.A., Initial Checkout, as outlined above. c) Allow the unit to warm up (thermally stabilize) for approximately 15 minutes before proceeding with steps d through f below.
  • Page 16 Horizontal probe mounting is preferred (see Section 3C). The procedure must be done with the L2000 properly installed in the intended storage tank, and with the intended process material. All or most of the probe may need to be covered. The angle between the adjustment marks may be quite small with non-conductive process materials.
  • Page 17 Section Four Adjustments and Operation Figure 4-3 Non-conductive Process Calibration Procedure...

  • Page 18: Alarm Action

    Adjustments and Operation C. Alarm Action The L2000 is in the normal “non-alarmed” state when it’s control relay is energized. The unit is in the “alarm” state when its internal control relay is de-energized. Hence, if the unit lost power, the internal control relay would de-energize, and an “alarm”...
  • Page 19 ü The LED should switch crisply from Green to Red or from Red to Green. It should never hang in between in an orange color. If the unit fails any of the above checks, return the L2000 electronic chassis to the factory for repair or replacement.

  • Page 20: Section 5. Equipment Service

    8. Person to contact at your Company 9. Return (Ship to) Address Princo level instruments are covered by a 10-year limited warranty. You will not be charged if it is determined that the problem is covered under warranty. Please return your equipment with freight charges prepaid.

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