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DESCRIPTION
The Tek-LCD 7801B is one of Tek-Trol’s most advanced and feature-packed explosion-proof, loop-powered indicators designed specifically for level applications that require a feet & inches display. The Tek-LCD 7801B can indicate up to 699 feet, 11 and 15/16 (or 7/8) inches. The Tek-LCD 7801B explosion-proof level indicator carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. It features a dual-line display that can be easily scaled in the field for any 4-20 mA analog input. Two features that really make the Tek-LCD 7801B stand out are its wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7801B tank-side indicator to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.
Features
- Display Level in Feet & Inches
- 4-20 mA Input Loop-Powered
- Programmable 1/8 or 1/16 Inch Display
- 20-Segment Tank Level Indicator
- Lower Display for Tag, Volume, or Percent
- SafeTouch® Through-Glass Button Programming
- Open Collector Alarm Output
- Loop-Powered or External DC-Powered Backlight Standard
- Explosion-Proof, IP68, NEMA 4X Enclosure
- Operates from -40 °C to 75 °C
Specifications
| Display | Feet & Inches display: 0.60″ (15.2 mm) high, 0 to 699 FT – 11 15/16 IN with 1/16 or 1/8 fraction display |
| Display Assignment | Lower display may be assigned to custom unit or tag, volume, volume and tag, percent height, percent height and tag, or off. |
| Display Update Rate | Ambient > -25°C: 2 Updates/Second Ambient < -25°C: 1 Update/5 Seconds |
| Externally Powered Backlight | Voltage Range: 9-36 VDC |
| Over Range | Level display flashes to 699 FT 11 15/16 IN Volume display flashes 9999999 if over range |
| Under Range | -999999 if under range |
| 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 |
| Password | Programmable password restricts modification of settings. |
| Nonvolatile 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
PRODUCT REVIEWS
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