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DESCRIPTION
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.
Features
- 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
Specifications
| Display | Upper: 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 Point | Upper process display has up to four decimal places or none: d.dddd d.ddd, d.dd, d.d, or ddddd |
| Display Update Rate | Ambient > -25 °C: 2 Updates/Second. Ambient < -25 °C: 1 Update/5 Seconds |
| Externally Powered Backlight | Voltage Range: 9-36 VDC |
| Display Orientation | Display may be mounted at 90° increments up to 270° from default orientation |
| Over Range | Display flashes 99999 |
| Under Range | Display flashes -9999 |
| Programming Method | Four SafeTouch® through-window buttons when cover is installed. Four internal pushbuttons when cover is removed. |
| Noise Filter | Programmable – Lo, Med, Hi, or Off |
| 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. |
| Advanced Functions | Linear, square root, or programmable exponent |
| Alarm Indication | Flashing display plus HI/LO indicators |
| Non-Volatile 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 |
| Operating Temperature Range | -40 °C to 75 °C |
| Storage Temperature Range | -40 °C to 75 °C |
| Relative Humidity | 0 to 90% non-condensing |
| Connections | Screw terminals accept 12 to 22 AWG wire |
| Enclosure | EMA 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. |
| Mounting | May be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe mounting. |
| Overall Dimensions | 5.67″ x 5.25″ x 4.18″ (144 mm x 133 mm x 106 mm) (W x H x D) |
| Weight | 1.65 lbs (26.4 oz, 0.75 kg) |
TECH DATA
PRODUCT REVIEWS
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