133 STDT Smart Tank Data Tx
Designed to fitted/retrofitted with the 133 ATLG, It is a microprocessor based transmitter for accurate digital conversion and transmission of product level and temperature data of tanks on a multi-drop RS 485 bus. It also provides an optional temperature measurement using an external temperature sensor SBEM’s 133 TMP.
- Accessory of 133 ATLG.
- Precise level and temperature transmission.
- Automatic selection of temperature points for average temperature measurement.
- Two way, two wire, digital transmission on RS 485 bus, allows looping of 16 transmitters, reduces cabling.
- RS 232 C output for Tank Side Indicator.
- PESO approved flameproof housing and intrinsically safe terminals for temperature sensor.
- Local (field) level, temperature and alarm status indication.
- Microprocessor based intelligent circuitry with self-diagnostics.
| Circuitry | Microcontroller 80C31 @ 8 MHz, 2 K RAM |
| Level Measurement & Transmission | Through optical encoder. |
| Range | 0-19999 mm |
| Accuracy | +/- 1 mm |
| Input | From sprocket shaft of SBEM or any other make of tank level gauge |
| Temperature Measurement & Transmission (optional) | Using external temperature sensor |
| Range | -100.0 to +100.0° C |
| Accuracy | +/- 0.2° C |
| Resolution | +/- 0.1° C |
| Sensor type | Pt-100 Spot / Averaging (Multi-point). Maximum 14 points Selection through solid state electronic multiplexer |
| Transmission to Communication Interface Unit | 2 Way / 2 wire RS 485 ASCII coded |
| Transmission to Tank Side Indicator | Serial RS 232C |
| Baud rate | 1200 (standard) |
| 2400 (optional) | |
| Data Protection | Longitudinal and vertical parity check. |
| Inbuilt Display (Optional) | 4 ½ digit, ½" high, 7 segment LCD to display sequentially - Level in mm - Temperature in C - Alarm status and diagnostics |
| Diagnostics | In-built |
| Power Supply | 110 VAC, ±10%, 50 Hz, 1 mains isolated, 4 VA |
| Ambient Operating Temperature | 0 to +60° C |
| Relative Humidity | 95% max. (non condensing) |
| Transmitter Housing | Cast Aluminium LM6 |
| Protection | Flameproof to IS/IEC 60079-1:2007, Zone 1, Gr. IIA & IIB |
| Weatherproof IP65 as per IS/IEC | |
| Terminals for temperature sensor | Intrinsically safe to IS 5780- temperature 1980, Ex ia IIA and IIB T6 |
- Two wire digital transmission of ATLG level, temperature and alarm status for remote indication.
- ATLG based Tank Farm Management System.
- Petroleum, Refineries, Chemicals, Petrochemicals.