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DESCRIPTION
The Tek-LCD 7803A is a plastic, field-mounted flow rate/totalizer that can display flow rate and total from a pulse output flow meter. Its display has a five digit upper line for rate, a seven alpha-numeric character lower line for total, and comes standard with a backlight. The Tek-LCD 7803A is built in a NEMA 4X and IP65 rated plastic enclosure which can stand up to even the harshest environmental conditions. It can be powered from an included battery or a 24 VDC external power supply. Some features that really make the Tek-LCD 7803A stand out are its automatic unit conversions from flow meter k-factor units, ability to log up to 1024 data points, and SafeTouch® through-window buttons. These buttons allow the Tek-LCD 7803A to be programmed and operated through the cover window, thus eliminating the need to remove the cover in dirty or wet environments.
Features
- Automatic Rate, Total, and Grand Total Unit Conversions
- On-Board Data Logging
- Modbus Communications RS-485 Option
- All Models Operate from -40 to 75°C (-40°F to 158°F)
- Two Isolated Open Collector Pulse Outputs, Up to 5 kHz
- Open Collector, NPN, PNP, TTL, Switch Contact, Sine Wave (Coil), Square Wave, Opto-Isolated Inputs
- Plastic NEMA 4X, IP65 Enclosure
- Isolated 4-20 mA Output for Rate, Total, or Grand Total
- Battery, DC, or Output Loop-Powered Models
Specifications
| Display | Top: Five digits (0 to 99,999), 0.7″ (17.8 mm) high, 7-segment, automatic lead zero blanking. Bottom: Seven characters, 0.4″ (10.2 mm) high, 14-segment automatic lead zero blanking. Symbols: Total, grand total, battery power/low battery, high & low alarm, password lock, and SafeTouch button sleep mode/disable. |
| Display Assignment | Top Display: Rate or total; Bottom Display: Combinations of rate, total, grand total, units, and custom tag. |
| Backlight | White LED, 10 sec auto-off when battery powered. Backlight deactivated below temperature ≈ -20°C |
| Display Update Rate | Ambient > -20°C: 1 Update/Second. Ambient < -20°C: 1 Update/10 Seconds. Note: Update is dependent on gate settings |
| Display Orientation | Display may be mounted at 90° increments up to 270° from default orientation |
| Over Range | Display flashes 99,999 |
| Programming Method | Four SafeTouch through-window buttons when cover is installed. Four internal push buttons when cover is removed. |
| Recalibration | Calibrated at the factory to read frequency in Hz. No recalibration required |
| Max/Min Display | Max/Min readings reached by the process are stored until reset by the user or until power to the meter is cycled. |
| Password Menu Options | Three programmable password selections can be used for the following: restrict modification of settings, prevent resetting the total or grand total without the password, or permanently lock out the ability to change or reset the grand total or any grand total related settings(making a non-resettable grand total). |
| Non-Volaile Memory | All programmed settings and total are stored in nonvolatile memory for a minimum of ten years if power is lost. |
| Power Options | 9-30 VDC, 2.2 W max; 4-20 mA Output Powered, 30 VDC max; battery power; 9-30 VDC power with battery backup; 4-20 mA Output Powered with Battery Backup. |
| Battery | 3.6 V Primary Lithium (Li-SOCl2), non-rechargeable Model PDABAT36C. Expected service life & recommended replacement interval is dependant on the operating conditions. |
| Isolation | All models: 500 V opto-isolated input-to-power/output with isolated input enabled. |
| Data Logging | Up to 1024 records, recorded 4/day at specific times or at defined time intervals. Record contains date, time, rate, total, grand total, and log number. |
| Operating Temperature Range | -40 to 75°C (-40°F to 158°F)total). |
| Storage Temperature Range | -40 to 75°C (-40°F to 158°F) |
| Relative Humidity | 0 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. |
| Mounting | May be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 0.13 to 0.21ft pipe mounting. |
| Overall Dimensions | 5.67″ x 5.25″ x 4.18″ (W x H x D) (144 mm x 133 mm x 106 mm) |
| Weight: | 1.65 lbs (26.4 oz, 0.75 kg) |
| Warranty | 3 years parts and labor |
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