NEMA 4X Loop-Powered Flow Rate/Totalizer Indicator


The Tek-LCD 7802A is a plastic field mounted loop-powered rate/totalizer fully featured for demanding applications in the harshest environmental conditions. The meter derives all of its power from the 4-20 mA loop. It is programmed using the four through-window buttons, without removing the cover, and can be scaled with or without a calibration signal. The numeric rate display will read up to 99999 and the alphanumeric total/tag display will read up to 9999999. The alphanumeric display can also be programmed to show any combination of numbers and letters up to seven characters long for use as engineering units and/or the process identification tag. The backlight lets you see the display under any lighting condition and can be powered from either the 4-20 mA loop or from a separate DC power supply. The enclosure has three threaded conduit holes, integrated pipe or wall mounting flanges, and allows for easy installation of tamper seals.
  • 4-20 mA Input Loop-Powered
  • 5-Digit, 0.7″ (0.05 ft) Upper Display
  • 7 Alphanumeric Character, 0.4″ (0.03 ft) Lower Display
  • Loop or External DC-Powered Backlight Standard
  • Safe Touch Through-Window Button Programming
  • Password Protection
  • 3.0 V Drop without Backlight
  • Plastic NEMA 4X, IP65 Enclosure
  • Flanges for Wall or Pipe Mounting
  • Linear, Square Root, or Programmable Exponent
  • Operates from -40 °C to 75 °C
  • Rate in Second, Minute, Hour, or Day
  • Open Collector Pulse or Alarm Output
DisplayUpper: Five digits (-9,999 to 99,999) 0.70″ (0.05 ft) high, 7-segment, automatic lead zero blanking. Lower: Seven characters 0.4″ (0.03 ft) high, 14 segment alphanumeric. Symbols: for high & low alarm, password lock. Backlight: white
Display Update Rate Ambient > -25°C (77°F): 2 Updates/Second. Ambient < -25°C (77°F): 1 Update/5 Seconds
Display Orientation  Display may be mounted at 90° increments up to 270° from default orientation.
Overrange  Display flashes 99,999
UnderrangeDisplay flashes -9,999
Programming MethodFour SafeTouch® through-window buttons when cover is installed. Four internal pushbuttons when cover is removed.
Noise Filter Programmable Lo, Med, Hi, or Of
Recalibration Recalibration 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.
Password  Programmable password restricts modification of programmed settings.
Advanced Functions Live input calibration, linearization, square root, or programmable exponent
Non-Volatile MemoryAll 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
Operating Temperature Range-40°C to 75°C (-40°F to 167°F).
Storage Temperature Range-40°C to 75°C (-40°F to 167°F).
Relative Humidity0 to 90% non-condensing
Connections Screw terminals accept 12 to 22 AWG wire
Enclosure NEMA 4X, IP65 plastic field enclosure. Color: grey. 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 0.21 ft pipe mounting
Overall Dimensions5.67″ x 5.25″ x 4.18″ (W x H x D) (0.47 ft x 0.43 ft x 0.34 ft)
Weight 1.65 lbs (26.4 oz, 0.75 kg)

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