Panel Mount Loop-Powered Process Indicator


These loop-powered TEK-LCD 7800C Panel Mount Loop-Powered Process Indicators are digital panel meters that can be installed virtually anywhere to provide a convenient and informative display of any 4-20 mA signal. One of the most convenient feature of TEK-LCD 7800C is its dual line display, which is typically used to display the process variable on a 5-digit alphanumeric top line and units/tag on the 8-digit alphanumeric bottom line.

TEK-LCD 7800C Indicator can also display the inputs in one scale on the top line (such as feet) and another scale on the bottom line (such as gallons). For customers who prefer to see their levels represented in digital format, we do offer a model that displays the level in feet and inches. Both of these lines use 14-segment, alphanumeric characters for clear indication of tags, units, or alarm messages. Further enhancing the display on this indicator, it is a 20-segment bargraph, which also includes a numeric value of the percentage the bargraph represents.

TEK-LCD 7800C Panel Mount Loop-Powered Process Indicator can be installed virtually anywhere because it gets the power from a 4-20 mA loop and therefore doesn’t require a separate power source.

Additional features allow TEK-LCD 7800C to be installed virtually anywhere, including a NEMA 4X, IP65 front panel. Its operating temperature range of -40 to 167°F (-40 to 75°C) (for safe area products), conformally coated PCBs, and a backlit LCD can be read in bright sunlight or dimly lit areas. Finally, they are intrinsically safe and nonincendive versions and can be installed in hazardous areas. Setup for TEK-LCD 7800C can be programmed and operated via the 4 front panel buttons or free PC-based software that connects to the meter via a micro USB cable.

  • 4-20 mA Input.
  • Loop-Powered Process Meter.
  • 1.5 Voltage Drop (4.5 Voltage Drop with Backlight).
  • Loop-Powered Backlight with Red Backlight for Alarm Conditions.
  • NEMA 4X, IP65 front panel.
  • Operating Temperature Range for Safe Area: -40 to 167°F (-40 to 75°C).
  • PC-Based USB Programming Software.
  • 5-Digit Alphanumeric Top Line.
  • 8-Digit Alphanumeric Bottom Line. 
  • Displays Level in Feet and Inches (up to 999 Feet, 11 & 15/16 inches).
  • 20-Segment Bar Graph with Numeric Percent Indication.
  • Conformal Coated PCBs for Dust and Humidity Protection.
  • Two Open Collector Outputs Standard.
  • Optional Loop-Powered Solid-State Relays.
  • Optional 4-20 mA Analog Output.
  • Relay Pump Alternation Based on Level and Runtime.
  • Display Relay Runtime and Cycle Count.

Except where noted all specifications apply to operation at 77°F.

Display Five Digits Top Display (-9999 to 99999) 0.7″ (17.8 mm) high, 14-segment, automatic lead zero blanking.
Seven Characters (Engineering Units) 0.4″ (10.2 mm) high, 14-segment
Symbols High & Low Alarm, Password Lock
Backlight White
Display Update Rate Ambient > -13°F: 2 Updates/Second Ambient < -13°F: 1 Update/5 Seconds
Overrange Display flashes 99999
Underrange Display flashes -9999
Programming Method Four through-window buttons when cover is installed. Four internal pushbuttons when cover is removed
Recalibration Recalibration is recommended at least every 12 months.
Max/Min Display Max/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
Password Programmable password restricts modification of programmed settings. Pass GT: Restricts the reset of grand total to Require re-entering the password. May enable a non-resettable grand total and permanent lockout of grand total- related settings with a specific password.
Non-Votalite Memory All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Normal Mode Rejection 64 dB at 50/60 Hz

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