Tek-Trol TEK-LCD 7800A-0L1 Instruction Manual Download Page 12 | Manualshive

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Tek-Trol TEK-LCD 7800A-0L1 Instruction Manual Download Page 12

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

. Connect to a contact

closure source such as a relay or a pushbutton as shown in
Figure 5.

Figure 5. External Alarm Reset/Acknowledge Connections

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

Page 1: ...Technology Solutions www tek trol com TEK LCD 7800A 0L1 NEMA 4X Loop Powered Level Indicator Instruction Manual Document Number IM 7800A 0L1...

Page 2: ...Customer Support 796 Tek Drive Crystal Lake IL 60014 USA Tel 1 847 857 6076 1 847 655 7428 www tek trol com No part of this publication may be copied or distributed transmitted transcribed stored in...

Page 3: ...t Button 14 3 3 3 Up Display Button 14 3 3 4 Enter Button 14 3 4 Main Menu 14 3 5 Setting Up the Meter SETUP 15 3 5 1 Setting Numeric Values 16 3 5 2 Setting the Level Decimal Point DECIMAL 16 3 5 3 M...

Page 4: ...7 Level Input Multipoint Linearization MULTIPT 27 3 8 8 Information INFO 27 4 Operation 28 4 1 Front Panel Buttons Operation 28 4 2 Display Maximum Minimum and Input Current 28 4 3 Reset Meter to Fact...

Page 5: ...er own risk Tek Trol LLC shall not be held liable for damages resulting from such improper use Failure to follow installation guidelines could result in death or serious injury Make sure only qualifie...

Page 6: ...enclosure Installation and service should be performed only by trained service personnel Wiring connectors are accessed by opening the enclosure To access electrical connectors remove the 2 captive sc...

Page 7: ...sure has three threaded conduit holes integrated pipe or wall mounting flanges and allows for easy installation of tamper seals 2 2 Specifications Except where noted all specifications apply to operat...

Page 8: ...0 03 of calibrated span 1 count square root programmable exponent accuracy range 10 100 of calibrated span MULTI POINT LINEARIZATION 2 to 32 points PROGRAMMABLE EXPONENT 1 0001 to 2 9999 LOW FLOW CUT...

Page 9: ...C 150 mA max ALARM OUTPUT Assign to level or volume for high or low alarm trip point DEADBAND 0 100 FS user selectable ACKNOWLEDGE Front panel ENTER button and external RESET terminals resets output a...

Page 10: ...for static sensitive components Use proper grounding procedures codes If the meter is installed in a high voltage environment and a fault or installation error occurs high voltage may be present on an...

Page 11: ...the meter and ensure personnel safety Figure 1 Connector Board 2 7 Connections Wiring Diagrams Signal connections are made to a four terminal connector mounted in the base of the enclosure For install...

Page 12: ...er 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 tw...

Page 13: ...n Figure 7 WARNING To avoid damaging the Tek LCD s amplifying components use care not to wire incorrectly or exceed output ratings A diode such as 1N4000 series will provide protection from relay tran...

Page 14: ...in between button activations Through window and mechanical buttons may be held to cycle through menus or digits in place of repeatedly pushing a button The sensors are disabled when a mechanical but...

Page 15: ...button location to press another 3 3 Buttons and Display 3 3 1 Menu Button Press the Menu button to enter Programming Mode Press the Menu button during Programming Mode to return to theprevious menu...

Page 16: ...lue and the loop input value in mA The display will time out in 12 seconds Press Display again to resume normal lower displayoper ation lower display will read RESUME Press the Up arrow button to scro...

Page 17: ...is accepted by pressing ENTER 3 5 Setting Up the Meter SETUP The Setup menu is used to select 1 Engineering unit s decimal location 2 Engineering units display scale 3 Tank indicator full and empty v...

Page 18: ...int one place to the right and pressing the Up arrow moves the decimal point one place to the left 3 5 3 Main Menu Display Functions Messages The meter displays various functions and messages during s...

Page 19: ...Enter the Password menu UNLOCKD Unlocked Program password to lock meter LOCKED Locked Enter password to unlock meter 3 5 4 Scaling the Meter The 4 20 mA input can be scaled to display the process in...

Page 20: ...hat output less than 20 mA at the maximum height of the tank or pit or more than 4 mA at the minimum height As an example when using a level transmitter that outputs 20 mA at 25 meters the tank height...

Page 21: ...igit reading and the ENTER button to confirm and select the next digit 3 6 Setting Up the Password PASSWRD The Password menu is used to program a five digit password to prevent unauthorized changes to...

Page 22: ...in the space provided Model Serial Number Password __ __ __ __ __ 3 6 2 Making Changes to a Password Protected Meter If the meter is password protected the meter will display the message LOCKED when...

Page 23: ...e 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 To try a...

Page 24: ...evel display calibration LVL CAL 5 Internal Calibration ICAL 6 Multipoint linearization for level MULTIPT 7 Meter system information display INFO 3 8 Advanced Features Menu Display Messages The follow...

Page 25: ...eters LVL CAL Level Calibration Calibrate the level display INPUT 1 Input 1 Calibrate input 1 value DSPLY 1 Display 1 Set display 1 feet and inches INPUT 2 Input 2 Calibrate input 2 value DSPLY 2 Disp...

Page 26: ...alarm has been set To set a high alarm program the set point above the reset point To set a low alarm program the set point below the reset point To acknowledge an alarm press the ENTER button once f...

Page 27: ...s shown in Configuring the Lower Display DISPLAY To scale the volume display select the decimal point location 0 1 2 3 or 4 then enter the level in engineering units for input 1 the corresponding volu...

Page 28: ...to warm up for at least 15 minutes before performing the calibration procedure Press MENU navigate to ADVANCEand press enter to access the Advanced Features Menu Press the UP arrow button to scroll to...

Page 29: ...ing of the level display Setting MULTIPT to ENABLE will alter the level display Scaling See Scaling the Meter and Level Calibration See Level Input Live Signal Calibration menus to include a Number of...

Page 30: ...d MINIMUM on the bottom display and the minimum value reached on the top display Pressing the RESET button while either of these values is displayed will reset that value to the current display value...

Page 31: ...ons to load factory defaults Enter the Advanced features menu Press and hold Reset button when INFO is shown For information on navigating to the Information menu refer to Advanced Features Menu Press...

Page 32: ...DECIMAL 1111 1 Input 1 INPUT 1 4 000 mA Display 1 DSPLY 1 0 0 Input 2 INPUT 2 20 00 mA Display 2 DSPLY 2 100 0 Tank Indicator 0 0 pCT 0 0 Tank Indicator 100 100 PCT 100 0 Bottom Display BOTTOM Tag Ba...

Page 33: ...in volume scale range of 9999999 and 999999 Display response is too slow Check filter setting to see if it can be lowered to LO or OFF If the display locks up or the meter does not respond at all Perf...

Page 34: ...gramming Hold for 5 seconds to enter Advanced Features Menu directly Right Arrow Move to next digit Go to previous menu or alphanumeric character selection Reset max or min while displayed Up Arrow Mo...

Page 35: ...Main Menu Advanced Menu...

Page 36: ...Analyzers Accessories TekValSys 796Tek Drive Crystal Lake IL 60014 USA Tel 1 847 857 6076 1 847 655 7428 Fax 1 847 655 6147 Email tektrol tek trol com www tek trol com Tek Trol is a fully owned subsi...

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