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.