NEMA 4X Loop-Powered Process and Level Indicator


Tek-LCD 7800A NEMA 4X Loop-Powered Process and Level Indicator is one of Tek-Trol’s most advanced and feature-packed plastic, field-mounted, loop-powered indicators. The fact that this meter is loop-powered means that there is no need to run additional, costly power lines. The Tek-LCD 7800A is built in a NEMA 4X and IP65 rated plastic enclosure which can stand up to even the harshest environmental conditions. It features a dual-line display that can be easily scaled in the field for any 4-20 mA analog input. The display has a five digit upper display, a seven alpha-numeric character lower display, and comes with a backlight standard. Two features that really make the Tek-LCD 7800A stand out are its wide viewing angle display and SafeTouch® through-window buttons. These buttons allow the meter to be programmed and operated through the cover window, thus eliminating the need to remove the cover in dirty or wet environments.

  • 4-20 mA Input Loop-Powered
  • Modern, Sleek and Practical Enclosure for Safe Areas
  • 5-Digit, 0.7″ (17.8 mm) Upper Display (0.6″ for -0L1 Models)
  • Optional Level Indicator Bar Graph
  • 7 Alphanumeric Character, 0.4″ (10.2 mm) Lower Display
  • SafeTouch® Through-Window Button Programming
  • Password Protection
  • 32-Point, Square Root, or Exponential Linearization
  • Loop or External DC-Powered Backlight Standard
  • 3.0 V Drop (6.0 V with Backlight)
  • NEMA 4X, IP65 Plastic Enclosure
  • Flanges for Wall or Pipe Mounting
  • HART® Protocol Transparent
  • Operates from -40 °C to 75 °C
DisplayUpper: Five digits (-9999 to 99999) 0.70″ (17.8 mm) high,7-segment, automatic lead zero blanking; -0L1: 0.6″ high with level bar graph. Lower: Seven characters 0.4″ (10.2 mm) high, 14 segment alphanumeric. Symbols: for high & low alarm, Password Lock. Backlight: White
Decimal PointUpper process display has up to four decimal places or none: d.dddd d.ddd, d.dd, d.d, or ddddd
Display Update RateAmbient > -25 °C: 2 Updates/Second.
Ambient < -25 °C: 1 Update/5 Seconds
Externally Powered BacklightVoltage Range: 9-36 VDC
Display OrientationDisplay may be mounted at 90° increments up to 270° from default orientation
Over RangeDisplay flashes 99999
Under RangeDisplay flashes -9999
Programming MethodFour SafeTouch® through-window buttons when cover is installed. Four internal pushbuttons when cover is removed.
Noise FilterProgrammable – Lo, Med, Hi, or Off
RecalibrationRecalibration is recommended at least every 12 months.
Max./Min. DisplayMax/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
PasswordProgrammable password restricts modification of programmed settings.
Advanced FunctionsLinear, square root, or programmable exponent
Alarm IndicationFlashing display plus HI/LO indicators
Non-Volatile MemoryAll programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Normal Mode Rejection64 dB at 50/60 Hz
Operating Temperature Range-40 °C to 75 °C
Storage Temperature Range-40 °C to 75 °C
Relative Humidity0 to 90% non-condensing
ConnectionsScrew terminals accept 12 to 22 AWG wire
EnclosureEMA 4X, IP65 plastic field enclosure. Color: gray. Material: Polycarbonate with UV Stabilizer. Three ¾” NPT threaded conduit openings. Two ¾” NPT plastic conduit plugs, with 1.29″ wrenching flats and a screwdriver slot, are included.
MountingMay be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe
Overall Dimensions5.67″ x 5.25″ x 4.18″ (144 mm x 133 mm x 106 mm) (W x H x D)
Weight1.65 lbs (26.4 oz, 0.75 kg)

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