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DESCRIPTION
The Tek-LCD 7802B is an explosion-proof, loop-powered flow rate/totalizer that can display flow rate and total from an analog output (4-20 mA) flow meter. The fact that this meter is loop-powered means that there is no need to run additional, costly power lines into a hazardous area. The display has a five digit upper display for rate, a seven alpha-numeric character lower display for total, and comes standard with a backlight. The Tek-LCD 7802B explosion-proof flow rate/totalizer carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. Two features that really make this flow rate/totalizer stand out are a wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7802B to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.
Features
- 4-20 mA Input Loop-Powered
- 5-Digit, 0.7″ (17.8 mm) Upper Display
- 7 Alphanumeric Character, 0.4″ (10.2 mm) Lower Display
- Loop or External DC-Powered Backlight Standard
- Password Protection
- SafeTouch Through-Glass Button Programming
- 3.0 V Drop without Backlight
- Flanges for Wall or Pipe Mounting
- Explosion-Proof, IP68, NEMA 4X Enclosure
- Linear, Square Root, or Programmable Exponent
- Rate in Second, Minute, Hour, or Day
- Open Collector Pulse or Alarm Output
- Operates from -40 °C to 75 °C
- HART Protocol Transparent
Specifications
| Display | Upper: Five digits (-9,999 to 99,999) 0.70″ (17.8 mm) high, 7-segment, automatic lead zero blanking. Lower: Seven characters 0.4″ (10.2 mm) high, 14 segment alphanumeric. |
| Display Update Rate | Ambient > -25°C: 2 Updates/Second Ambient < -25°C: 1 Update/5 Seconds |
| Display Orientation | Display may be mounted at 90° increments up to 270° from default orientation. |
| Over Range | Display flashes 99,999 |
| Under Range | Display flashes -9,999 |
| Programming Method | Four SafeTouch® through-glass buttons when cover is installed. Four internal pushbuttons when cover is removed |
| Noise Filter | Programmable low (LO), medium (MED), high (HI), or off (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. |
| Advanced Functions | Live input calibration, linearization, square root, or programmable exponent. |
| Password | Programmable password restricts modification of settings |
| 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 | Explosion-proof die-cast aluminum with glass window, corrosion resistant epoxy coating |
| 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 | 5.65″ x 5.25″ x 4.86″ (W x H x D) (144 mm x 133 mm x 124 mm) |
| Weight | 5.00 lbs (80 oz, 2.27 kg) |
TECH DATA
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