Discontinued

FMA-900

FMA900 Discontinued

Please note this model has been replaced by the FMA1000 series

Beschreibung

Please note this model has been replaced by the FMA1000 series

The unique FMA-900 air velocity transducer uses both a velocity sensor and a temperature sensor to accurately measure air velocity (in metres per second). The built-in temperature sensor automatically corrects the flowrate for temperature variations. Both sensors are rugged glass-coated platinum resistance detectors (RTDs). The circuit heats the velocity sensor to a constant temperature differential above ambient temperature and measures the cooling effect of the air flow. This design provides excellent low velocity sensitivity and high accuracy. The FMA-900 also features negligible pressure drop. To obtain mass flowrate the m/s velocity indicated by the FMA-900 is multiplied by the cross-sectional area of the pipe or duct.. A traverse across the pipe or duct can be performed to determine the mounting location for average velocity indication. The FMA-900 can be mounted in pipes (down to 25mm in size) with the use of OMEGA™ SSLK compression fittings (SSLK-14-14). PFA ferrules are required. (model T-FER- 14). Each unit is individually calibrated in OMEGA’s traceable wind tunnel.

The Remote Electronics Option (-R) comes with a 3.5m cable from the sensor to a quick disconnect connector and then to the mating connector with 600mm of wire which connects directly into the electronics box. The electronics box has another connector on the opposite side with a 4.5m cable with strip leads. A total of 8.6m of cable. Designed for tight spaces.

SPECIFICATIONS
Accuracy: 1.5% FS @ room temp. Add ±0.5% of reading from 0 to 50°C (32° to 122°F); add 1% FS below 5m/s (1000 FPM)
Repeatability: ±0.2% FS
Initial Stabilisation Time in Flow: 40 sec
Response Time/After Stabilisation: 400 msec to within 63% of final value at room temperature
Probe: Aluminium oxide ceramic glass coating, epoxy; probe body 304 SS
Probe Temperature: -40 to 121°C (-40 to 250°F)
Probe Pressure: 150 PSIG Max
Electronics Temperature: 0 to 50°C (32 to 122°F), operating; 0 to 70°C (32 to 158°F), storage Operating Relative Humidity: less than 80% RH, without condensation Ambient Temp Compensation: about 5 min for 11°C (20°F) temp change
Outputs: 0 to 5 Vdc or 4 to 20 mA
Voltage Load Resistance: 250 ohms minimum
Current Loop Resistance: 0 ohms min. to 400 ohms max.; 4 wire
Power: 15 to 24 Vdc,300 mA (0 to 0.5 and 0 to 1m/s only); 15 to 18 Vdc, 300 mA (all other ranges)
Accessories: Mating connector pre-wired to 4.5m shielded cable (with built-in ferrite core) included
Dimensions:
Case: 89 H x 51 W x 31.8 mm D (3.5 H x 2 W x 1.25" D)
Probe: 6.35 mm (0.250") O.D., 330 mm (13") length, optional 3.75" available (-S)
Weight: 160 g (5.6 oz)

Please download PDF file below for full product specifications