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Tek-Trol TEK-LCD 7800A-0L1 Instruction Manual

Nema 4x loop powered level indicator
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Technology Solutions
L
T
EK-
CD 7800A-0L1
NEMA 4X Loop Powered Level Indicator
Instruction Manual
Document Number: IM-7800A-0L1
www.tek-trol.com

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Summary of Contents for Tek-Trol TEK-LCD 7800A-0L1

  • Page 1 Technology Solutions CD 7800A-0L1 NEMA 4X Loop Powered Level Indicator Instruction Manual Document Number: IM-7800A-0L1 www.tek-trol.com...
  • Page 2 Crystal Lake, IL 60014 Tel: +1 847 857 6076, +1 847 655 7428 © COPYRIGHT Tek-Trol LLC 2019 No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express written permission.

  • Page 3: Table Of Contents

    Table of Contents Safety Instructions ........................4 Installation ............................4 Unpacking ............................4 Conduit/Stopping Plug ........................4 Product Description ........................5 Introduction ............................. 5 Specifications ............................ 5 Dimensional Drawing ........................7 Ordering Information ........................8 Mounting............................8 Connections ............................8 Connections &...
  • Page 4 3.8.4 Level Input Live Signal Calibration (LVL CAL) ..................25 3.8.5 Internal Calibration (ICAL) ........................26 3.8.6 Calibration Error Message (Error SPAN) ....................27 3.8.7 Level Input Multipoint Linearization (MULTIPT) ..................27 3.8.8 Information (INFO) ..........................27 Operation ........................... 28 Front Panel Buttons Operation ......................
  • Page 5 • This product is not recommended for life support applications or applications where malfunctioning could result in personal injury or property loss. Anyone using this product for such applications does so at his/her own risk. Tek-Trol LLC shall not be held liable for damages resulting from such improper use.

  • Page 6: Safety Instructions

    1.3 Conduit/Stopping Plug The Tek-LCD 7800A-0L1 is provided with three ¾ NPT threaded conduit openings and one IP68 rated ¾ NPT plastic conduit plug. The conduit/stopping plug included has 1.29 wrenching flats and a screwdriver slot.

  • Page 7: Product Description

    2 Product Description 2.1 Introduction The Tek-LCD 7800A-0L1 is a plastic field mounted loop-powered meter fully featured for demanding applications in the harshest environmental conditions. The bar graph representation of the process input is perfect for level applications and allows for quick assessment of current conditions.
  • Page 8 NORMAL MODE 64 dB at 50/60 Hz REJECTION Operating temperature range: -40°F to 167 °F (-40°C to 75°C) ENVIRONMENTAL Storage temperature range: -40°F to 167 °F (-40°C to 75°C) Relative humidity: 0 to 90% non-condensing CONNECTIONS Screw terminals accept 12 to 22 AWG wire May be mounted directly to conduit.

  • Page 9: Dimensional Drawing

    36 VDC (0.75 W), Over current protection to 2 A max. INPUT OVERLOAD OPEN COLLECTOR OUTPUT Isolated open collector, 30 VDC @ 150 mA max. RATING Assign to level or volume for high or low alarm trip point. ALARM OUTPUT 0-100% FS, user selectable DEADBAND Front panel ENTER button and external RESET terminals resets output and...

  • Page 10: Ordering Information

    Tek-LCD 7800A-6846SS Stainless Steel Pipe Mounting Kit 2.5 Mounting The Tek-LCD 7800A-0L1 has two slotted mounting flanges that may be used for pipe mounting or wall mounting. Alternatively, the unit may be supported by the conduit using the conduit holes provided.

  • Page 11: Connections & Wiring Diagrams

    OUTPUT- NPN open collector output negative. RESET + Contact closure alarm acknowledge pull up to 3 VDC. RESET- Contact closure alarm acknowledge ground/negative. Refer to Figure 1 for terminal positions. WARNING Observe all safety regulations. Electrical wiring should be performed in accordance with all agency requirements and applicable national, state, and local codes to prevent damage to the meter and ensure personnel safety.

  • Page 12: External Acknowledge Connection

    Figure 3. Connections with Loop-Powered Backlight Figure 4. Connections with Externally-Powered Backlight It is possible to use the same transmitter (signal loop) power supply for the externally powered backlight. The backlight circuit will draw 25 mA in addition to the loop circuit. 2.8 External Acknowledge Connection External acknowledge connections are made to two terminals labeled .

  • Page 13: Open Collector Output Connections

    2.9 Open Collector Output Connections Output connections are made to two terminals labeled OUTPUT. Connect to an input device such as alarm indicator as shown in Figure 6, or drive a relay as shown in Figure 7. WARNING To avoid damaging the Tek-LCD’s amplifying components, use care not to wire incorrectly or exceed output ratings.

  • Page 14: Setup And Programming

    3.2 Through-Window Buttons The Tek-LCD 7800A-0L1 is equipped with four sensors that operate as through-window buttons so that it can be programmed and operated without removing the cover (and exposing the electronics) in a hazardous area.

  • Page 15: Buttons And Display

    NOTE Through-window buttons will not work if two or more buttons are detected as being pressed simultaneously. As a result, be careful to avoid triggering multiple buttons or reaching across one button location to press another. 3.3 Buttons and Display 3.3.1 Menu Button Press the Menu button to enter Programming Mode.

  • Page 16: Right / Reset Button

    meter. 3.3.2 Right / Reset Button Press the Right-arrow button to reset the maximum or minimum value while it is being displayed • (see Up / Display Button below). Press the Right-arrow button to move to the next digit or decimal position during programming. •...

  • Page 17: Setting Up The Meter (Setup)

    Hold MENU, at any time, to exit and return to Run Mode. Changes made to settings prior to pressing • ENTER are not saved. Press the MENU button during Programming Mode to return to return to the previous menu • selections.

  • Page 18: Setting Numeric Values

    3.5.1 Setting Numeric Values The numeric values are set using the RIGHT and UP arrow buttons. Press RIGHT arrow to select next digit and UP arrow to increment digit. The digit being changed blinks. Press the ENTER button, at any time, to accept a setting. Hold MENU, at any time, to exit and return to Run Mode.

  • Page 19: Scaling The Meter

    0 PCT 0 Percent Set the tank empty value 100 PCT 100 Percent Set the tank full value DISPLAY Display Enter Bottom Display menu Display a custom unit or tag VOLUME Volume Display volume VOL+TAG Volume + Tag Display volume and custom tag PCT HT Percent Height Display percent height...

  • Page 20: Minimum Input Span

    For instructions on using multipoint scaling, see Level Input Multipoint Linearization (MULTIPT). For instructions on how to program numeric values see Setting Numeric Values. 3.5.5 Minimum Input Span The minimum input span is the minimum difference between input 1 and input 2 signals required to complete the calibration or scaling of the meter.

  • Page 21: Setting The Tag

    3.5.9 Setting the Tag Any bottom display setting that includes a tag will require the tag to be entered. The fully alphanumeric values for the tag are set using the RIGHT button to select the digit, the UP and RIGHT arrow buttons to select the digit reading, and the ENTER button to confirm and select the next digit.

  • Page 22: Locking The Meter

    3.6.1 Locking the Meter Enter the Password menu and program a five-digit password. For instructions on how to program numeric values see Setting Numeric Values. Record the password for future reference. If appropriate, it may be recorded in the space provided. Model: Serial Number: Password:...

  • Page 23: Disabling Password Protection

    3.6.3 Disabling Password Protection To disable the password protection, access the Password menu and enter the correct password, as shown below. If the correct five-digit password is entered, the meter displays the message UNLOCKD (unlocked) and the protection is disabled until a new password is programmed. If the password entered is incorrect, the meter displays the message LOCKED and returns to Run Mode.

  • Page 24: Advanced Features Menu (Advance)

    3.7 Advanced Features Menu (ADVANCE) To simplify the setup process, functions not needed for most applications are located in the Advanced Features Menu. Access the Advanced Features Menu by pressing ENTER at the ADVANCE menu in the Main Menu defined. The Advanced Features Menu is used to select: 1.
  • Page 25 Display Parameter Action/Setting FILTER Filter Set noise filter Filter Low Set noise filter to low setting nmED Filter Medium Set noise filter to medium setting Filter High Set noise filter to high setting Filter Off Disable noise filter VOLSCAL Volume Scale Scale the volume display Volume Decimal Set the decimal position for volume scaling...

  • Page 26: Alarm Output (Output)

    3.8.1 Alarm Output (OUTPUT) The Tek-LCD 7800A-0L1 is equipped with an NPN open collector output that may be set up for high or low alarm trip point based on the level display (LEVEL) or the volume scale (VOLUME). The output may be disabled by selecting OFF.

  • Page 27: Volume Display Scaling (Volscal)

    3.8.3 Volume Display Scaling (VOLSCAL) Volume may be scaled as a function of the level display. It may use up to 32-point linearization. The multi-point linearization can be used to linearize the display for non-linear signals such as those from level transmitters used to measure volume in odd-shaped tanks. To display the volume, select a bottom display including the volume display in the Display menu as shown in Configuring the Lower Display (DISPLAY).

  • Page 28: Internal Calibration (Ical)

    AL M INDICAT INDICAT ALARM 3.8.5 Internal Calibration (ICAL) There is no need to recalibrate the meter when first received from the factory. The meter is factory calibrated prior to shipment. The calibration equipment is certified to NIST standards The internal calibration is the meter’s master calibration that makes scaling the meter without a signal source possible.

  • Page 29: Calibration Error Message (Error Span)

    3.8.6 Calibration Error Message (Error SPAN) An error message indicates that the calibration process was not successful. After the error message is displayed, the meter will revert to the 4.000 calibration menu. The error message might be caused by inadvertently leaving the signal at the previous level or not maintaining the minimum span.

  • Page 30: Operation

    4 Operation 4.1 Front Panel Buttons Operation 4.2 Display Maximum, Minimum, and Input Current The maximum and minimum values and the measured input loop current may be displayed temporarily on the lower display. To display these values, press the DISPLAY button. The meter will display the word MAXIMUM on the bottom display and the maximum value reached (since the last maximum reset) on the top display.

  • Page 31: Reset Meter To Factory Defaults

    4.3 Reset Meter to Factory Defaults When the parameters have been changed in a way that is difficult to determine what’s happening, it might be better to start the setup process from the factory defaults. Instructions to load factory defaults: Enter the Advanced features menu.

  • Page 32: Factory Defaults & User Settings

    4.4 Factory Defaults & User Settings The following table shows the factory setting for most of the programmable parameters on the meter. Next to the factory setting, the user may record the new setting for the particular application. Model: ______________ S/N: _______________ Date: _________ Parameter Display...

  • Page 33: Troubleshooting

    5 Troubleshooting Due to the many features and functions of the meter, it’s possible that the setup of the meter does not agree with what an operator expects to see. If the meter is not working as expected, refer to the Diagnostics menu and consult the recommendations described below.

  • Page 34: Quick User Interface Reference

    6 Quick User Interface Reference Pushbutton Function Go to programming mode or leave programming. Hold for 5 seconds to MENU enter Advanced Features Menu directly. Move to next digit. Go to previous menu or alphanumeric character Right Arrow selection. Reset max or min while displayed. Move to next selection or increment digit.
  • Page 35 Main Menu Advanced Menu...
  • Page 36 Tek-Trol is a fully owned subsidiary of TEKMATION LLC. We o er our customers a comprehensive range of products and solutions for process, power and oil & gas industries. Tek-Trol provides process measurement and control products for Flow, Level, Temperature &...

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