All of the systems detailed here are supplied as standard with the Model 0012B Universal Impeller Control Display Unit. This unit offers real time and averaged display of velocity and data confidence level for all contact closure current meters, including those of other manufacturers, and is capable of storing calibration coefficients for up to 10 different meters. A data logging facility is also available.
The display is an LCD Graphics display, with optional backlight. Sealed to IP67 and weighing less than 2kg, it is suitable for all conditions and is a powerful tool in the monitoring of current flow.
DEFINITION
The 8011 Series impeller fitted to the BFM001 and the 1178 Series impeller BFM002 have both been group calibrated by HR Wallingford, UK to British Standard BS3680, Part A, 1973. This means that impellers can be changed at any time without the need for recalibration. The group calibration of the 8011 impeller is accurate to � 1.5% of measured velocity, and the 1178 impeller to � 2.5%.
Specific calibration of any impeller can be arranged at HR Wallingford, if necessary.
ORDERING INFORMATION
Both the BFM001 and BFM002 may be used with wading rods, hand suspended, or with a cableway system. Each wading set contains three 50cm stainless steel wading rods, which are engraved in centimetres and colour coded for 1cm, 5cm and 10cm. The suspension set contains a 35m cable and hanger bar for suspending a sinker weight if necessary. Both systems are supplied with a real time velocity control display unit, the model 0012B.
Items may be ordered by their individual part numbers , but the following sets are standard configurations:
0001001 BFM001 Wading Set, comprising Flow Meter with 125mm diameter impeller, Model 0012B Control Display Unit, 3 x 0.5m stainless steel wading rods (graduated in cm, complete with base plate and direction knob), 2m wading cable carrying case, and operating manual.
0002001 BFM002 Wading Set. As above, except Flow Meter has 50mm diameter impeller.
0001002 BFM001 Suspension Set, comprising Flow Meter with 125mm diameter impeller, Model 0012B Control Display Unit, 35m suspension cable, 0.75m tail fin, suspension bar, carrying case and operating manual.
0002002 BFM002 Suspension Set. As above, except Flow Meter has 50mm diameter impeller.
0001003 BFM001 Conversion Kit, for converting a wading set to a suspension set, comprising 35m suspension cable, 0.75m tail fin, suspension bar and carrying case.
0002003 BFM002 Conversion Kit. As above, except 35m suspension cable is for use with BFM002.
SPECIFICATIONS
Model |
Velocity Range |
Accuracy |
Impeller |
BFM001 |
0.03 to 10 m/sec |
±
1.5% reading above 0.15 m/sec
±
0.004 m/sec below 0.15 m/sec |
125mm diameter by 0.27m pitch |
BFM002 |
0.046 to 5 m/sec |
±
2.5% reading above 0.5 m/sec
±
0.01 m/sec below 0.5 m/sec |
50mm diameter by 0.10m pitch |