J&E Hall HBLT-A1 Manual

Liquid level transmitters

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HB Products HBLT-A1 Liquid Level Transmitters
Contents
1.
About this Publication.................................................................................................... 2
1.1.
Safety Warnings and Symbols ................................................................................................. 2
1.2.
Units of Measurement .............................................................................................................. 2
1.3.
Terminology ............................................................................................................................. 2
1.4.
Additional Copies ..................................................................................................................... 2
2.
Introduction ................................................................................................................... 3
3.
Technical Data .............................................................................................................. 3
4.
Operation ...................................................................................................................... 5
5.
Installation ..................................................................................................................... 5
5.1.
General .................................................................................................................................... 5
5.2.
Wiring ....................................................................................................................................... 6
6.
Commissioning .............................................................................................................. 6
6.1.
Selecting the Refrigerant ......................................................................................................... 7
6.2.
Signal Damping........................................................................................................................ 7
6.3.
Calibration ................................................................................................................................ 8
6.3.1.
Adjusting the Minimum and Maximum Calibration Points ................................................. 8
6.3.1.1.
Minimum Calibration .................................................................................................... 8
6.3.1.2.
Maximum Calibration ................................................................................................... 8
6.3.1.3.
6.3.1.4.
6.4.
Restore Factory Default Settings ............................................................................................. 9
6.5.
LED Indication.......................................................................................................................... 9
7.
Maintenance ................................................................................................................ 10
8.
Faults and Remedies .................................................................................................. 10
9.
Spare Parts ................................................................................................................. 10
10.
Safe Disposal, End-of-life (EOL) ................................................................................. 10
List of Figures
Fig 1 Arrangement, Dimensions and Model Numbers ............................................................................ 4
Fig 2 Installation ..................................................................................................................................... 5
Fig 3 Installation into Standpipe or Vessel .............................................................................................. 6
Fig 4 Wiring ............................................................................................................................................ 6
Table 1 Technical Data ........................................................................................................................... 3
Table 2 Refrigerant Settings ................................................................................................................... 7
Table 3 Faults and Remedies ............................................................................................................... 10
J & E Hall International
All rights reserved. No part of this publication may be reproduced or transmitted in any form or by
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The copyright in this publication shall be and remain the sole property of J & E Hall International.
Section 9
Issue 1 : 10/22
©
2022
Section 4
Publication 9-86
Issue 1 : 10/22
Publication 9-86
Page 1 of 10

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Summary of Contents for J&E Hall HBLT-A1

  • Page 1: Table Of Contents

    Section 4 Publication 9-86 Issue 1 : 10/22 HB Products HBLT-A1 Liquid Level Transmitters Contents About this Publication....................2 1.1. Safety Warnings and Symbols ....................2 1.2. Units of Measurement ......................2 1.3. Terminology ..........................2 1.4. Additional Copies ........................2 Introduction ........................
  • Page 2: About This Publication

    HB Products HBLT-A1 Liquid Level Transmitters About this Publication These instructions have been prepared according to the following standards: • BS EN ISO 11442: Technical product documentation. Document management; • BS EN ISO 12100: Safety of machinery - General principles for design - Risk assessment and risk reduction;...
  • Page 3: Introduction

    Part A : Specification in Section 1 of the plant instruction manual. This publication covers HBLT-A1 level transmitters, for other types of HB level transmitter refer to publication 9-85.
  • Page 4: Fig 1 Arrangement, Dimensions And Model Numbers

    HB Products HBLT-A1 Liquid Level Transmitters BSP Threads NPT Threads Item Description Item Description Item Description Screw - cover Calibration pushbutton Spanner flats DIN plug Cover – transmitter housing Threads (BSP or NPT) Red LEDs (bar graph) Transmitter housing Transmitter rod...
  • Page 5: Operation

    HB Products HBLT-A1 Liquid Level Transmitters Operation Liquid level is detected by change in capacitance. The hollow transmitter rod acts as one plate of the capacitor, the PTFE coated electrode inside the rod acts as the other plate. As the liquid level rises and falls there is a change in the value of capacitance.
  • Page 6: Wiring

    HB Products HBLT-A1 Liquid Level Transmitters Tighten to 80 to 150 Nm NPT threads: use Loctite 577 thread sealer BSP threads: use sealing ring provided Fig 3 Installation into Standpipe or Vessel 5.2. Wiring The transmitter supplies a 4 to 20 mA signal in proportion to the level of liquid refrigerant to a suitable controller (PLC).
  • Page 7: Selecting The Refrigerant

    HB Products HBLT-A1 Liquid Level Transmitters 6.1. Selecting the Refrigerant The liquid level transmitter is supplied factory set for use with R717 (ammonia) refrigerant. If this refrigerant is used there is no need to change this setting. For other refrigerants, or if the transmitter housing electronics have been replaced, proceeds as follows: Arrange to measure the 4 to 20 mA output signal.
  • Page 8: Calibration

    HB Products HBLT-A1 Liquid Level Transmitters 6.3. Calibration The level transmitter electronics are calibrated for R717 (ammonia) refrigerant (refer to 6.1) and a transmitter rod length of 1500 mm (59”). The default factory settings are: • 0 % (transmitter rod completely uncovered) output signal 4 mA;...
  • Page 9: Maximum Calibration When The Maximum Liquid Level Is Different From 20 Ma

    HB Products HBLT-A1 Liquid Level Transmitters Starting at 4 mA, observe the output signal increasing. Release the pushbutton when the output signal is approximately 0.5 mA from the desired point. Repeat steps (c) and (d). Each repeat will increase the output signal by approximately 0.05 mA.
  • Page 10: Maintenance

    If the system uses R717 (ammonia) refrigerant, oil may tend to collect at the bottom of the level column. The HBLT-A1 is less susceptible to oil logging than other designs of level transmitter, however, if it is suspected...

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