| Level/Flow Monitor to consist of an non-contacting ultrasonic sensor, connecting cable, and a remote enclosure with indicating, transmitting and controlling electronics.
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| Level Measuring & Controlling |
SLT32 Level & Flow Monitor
 sensor - PZ32T, PVC and teflon, 32 ft / 10 m range |
| sensor cable - 25 ft / 7.6m coaxial |
| enclosure - watertight, dust tight NEMA4X (IP66) polycarbonate |
| programming - built-in 3 button keypad, Password protected |
| calibration - Level, Range or Open Channel Flow |
| displays - Level/Flow values - large 4-digit LCD Menu/Status/Totalizer - 16-digit alphanumeric |
| 3 relays - 5 ampere SPDT, programmable alarm and/or pump control modes, lead/lag pump |
| temperature compensation - automatic |
| output - isolated 4-20mA (1000 ohm) |
| power input - 100-130VAC 50/60Hz, 7 watts maximum |
| electrical surge protection - sensor, AC power and 4-20mA output |
| 1 PC software utilities disk |
| 1 Manual - Installation and Operation |
LEVEL + FLOW MONITOR SPECIFICATIONS
SCOPE: This specification covers a non-contacting ultrasonic Level/Flow Monitor as manufactured by Greyline Instruments, Massena New York / Long Sault, Ontario. This instrument shall provide for indicating, transmitting and control of the material level in a vessel or proximity of a target to the instrument sensor, and indicating, transmitting, and totalizing of the flow rate through a flume, weir, or other primary measuring device |
| A. GENERAL |
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Level/Flow Monitor to consist of an non-contacting ultrasonic sensor, connecting cable, and a remote enclosure with indicating, transmitting and controlling electronics.
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Measurement accuracy shall be ±0.25% of Range or 2 mm (0.08"), whichever is greater, and shall be automatically temperature compensated.
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Sensor cable length shall be as required by installation, not to exceed 500' (152 m).
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System shall have no moving parts and shall not contact the material being measured.
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Shall include PC software program disk to determine open channel flow calibration values for non-standard flumes and weirs.
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| B. SENSING ELEMENT |
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Sensor shall be constructed of PVC and Teflon. |
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The sensor shall have a minimum deadband or blanking of 12" (305 mm) and a maximum range of 32 ft.
(10 m), and have an operating frequency of 42 kHz with an ultrasonic beam angle of 8 Degrees. |
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sensor shall withstand accidental submersion to 20 psi. |
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Sensor operating temperature shall be from -40°F to 150°F (-40°C to 65°C). ; |
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Sensor shall include integral temperature sensor. Temperature sensors requiring separate mounting and
wire runs shall not be accepted.
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| C. SENSOR CONNECTING CABLE |
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Provide RG62AU coaxial cable 25' (7.6m) continuous length, with waterproof, potted bond to the Sensor head.
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Extended sensor cable shall be RG62AU coaxial to a maximum of 500' (152m). Cable shall be spliced with screw terminal connections in manufacturer's recommended steel NEMA4 Junction Box.
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Level and temperature signals shall be conducted on one single coaxial cable. Separate or multiple-conductor cables shall not be accepted.
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Sensor cable shall be installed in grounded metal conduit |
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| D. TRANSMITTER |
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The transmitter shall provide for field-calibration via built-in 3-key calibration system with menu selection of parameters. Systems requiring calibration by Parameter codes, BCD switches or external calibrators shall not be accepted.
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Calibration data shall be permanently stored through power interruptions without requirement of a back-up battery.
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Field calibration shall allow selection and automatic conversion of measurement units, measurement span and control relays.
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The transmitter shall provide for field calibration in user-selected Range, Level or Open Channel Flow modes. Flow mode shall allow calibration to common primary metering devices, plus allow entry of calibration formula for non-standard flumes, weirs or open channels.
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The transmitter shall provide for field calibration in user-selected Range, Level or Open Channel Flow modes. Flow mode shall allow calibration to common primary metering devices, plus allow entry of calibration formula for non-standard flumes, weirs or open channels.
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Transmitter shall permit field programmable damping to smooth output in turbulent level conditions, and programmable rejection time to disregard false signals from agitators, waves and spurious echoes.
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Transmitter operating temperature shall be from -5° to 140°F (-20° to 60°C).
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Transmitter shall have an isolated 4-20mA output into a 1000 ohm maximum load. Output shall allow field programmable offsets of 4mA and 20mA.
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Provide 3 control relay contacts rated 5 ampere SPDT. Relays shall be programmable for single set point alarms, dual set point pump control, pump alternation, temperature alarm, flow totalizer pulse and/or echo loss alarm.
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Provide a 4-digit LCD display scaled in user-selected engineering units.
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Provide a 16-digit alphanumeric display indicating units of measurement, calibrated full scale, flow totalizer, echo-loss condition and error messages |
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Transmitter shall be housed in a wall-mount, watertight NEMA4X enclosure with hinged, clear cover. Mounting hardware shall be included.
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Transmitter Displays indicating level and units of calibration, shall be visible without opening cover.
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Transmitter electronics shall be surge protected on AC power input, sensor and 4-20 mA output.
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Transmitter power input shall be 115VAC 50/60Hz with power consumption of 7 watts or less.
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| E. OPTIONAL FEATURES FOR INSERTION AS REQUIRED |
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Have 3 additional (6 total) control relays, rated 5 amp SPDT and programmable for single set point alarms, dual set point pump control, pump alternation, temperature alarm, flow totalizer pulse and/or echo loss alarm. |
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Sensor, connecting cable and junction boxes shall be rated intrinsically safe to Class I,II,III, Div. I,II, Groups C,D,E,F,G.
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Have a thermostat controlled enclosure heater for Transmitter operation at temperatures below freezing.
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Have an all-Teflon sensor Model PZ32TE rated intrinsically safe when connected through an approved safety barrier, and rated for operation from -40°F to 170°F (-40°C to 76°C).
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Have a PVC and Teflon sensor Model PZ52T rated for measurement range on liquids up to 50 ft. (15.6 m).
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Have a Teflon-faced flange mount sensor model PZ34TxF rated for 32 ft (10 m) measurement range. Specify flange size of 4”, 6” or 8”.
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Have manufacturer's recommended enclosure sunscreen to permit Transmitter mounting in direct sunlight.
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Have manufacturer's recommended Sensor sunscreen to permit temperature-compensated Sensor mounting in direct sunlight.
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Have manufacturer's recommended Panel Mount Flange assembly for enclosure installation.
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Have a built-in 50,000 point data logger with Windows™ software for data retrieval, graphing and export. Data Logger shall include RS232 output and serial cable for direct PC connection, or dial-up connection through modems.
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Transmitter power input shall be 200-260VAC 50/60Hz with maximum power consumption of 7 watts or less.
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Transmitter shall be housed in a wall-mount, watertight NEMA4X enclosure with hinged, clear cover. Mounting hardware shall be included.
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Transmitter Displays indicating level and units of calibration, shall be visible without opening cover.
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Transmitter electronics shall be surge protected on AC power input, sensor and 4-20 mA output.
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Transmitter power input shall be 115VAC 50/60Hz with power consumption of 7 watts or less.
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Transmitter power input shall be 24VDC with maximum power consumption of 6 watts or less.
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Transmitter power input shall be 12VDC (battery power) with maximum power consumption of 6 watts or less.
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| F. MANUFACTURER |
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Level/Flow Monitor shall be Model SLT32 as manufactured by Greyline Instruments Inc. and shall be warranted against defects in materials and workmanship for one year.
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