- 800 Series
Flow Turbine Summary
- 800 Series Flow
- 800 Flow Turbine
- 800 Series
Flow Turbine PDF
- 800 Series
Flow Turbine Gallery
800 Series Pre Scaler
Flowmeters: 800 Series flow turbine meter
The 800 series flowmeter is designed to give high performance and competitive pricing with 6 flow ranges from 0.05 to 15 litres per minute. It's totally non-metallic wetted components makes this the ideal choice for the metering of aggressive chemicals including ultra-pure water. The standard inlet tubes are barbed to accept two hose sizes 8mm and 12mm although for OEM use alternatives are available. The bearings are made of sapphire for long life and reliability, the body is moulded PVDF as standard and the ‘O’ ring seal is typically Viton™.
Flowmeters: 800 Series turbine flow meter features:
- Low cost
- PVDF or PP body
- 1- 2% FSD
- Sapphire bearings
- Hall Effect sensor
- 6 Flow ranges
- Pulse output (NPN Std)
- Pulse output (PNP Option)
- 10 Bar rating
- VitonTM seal as std.
- 8 &12 mm hose tails
- 0.1% Repeatability
- 4.5 to 24 V dc
- -25°C Min to 125°C Max
- Ideal for
- Drink dispensing
- Laboratory tests
- Cooling equipment
- Active flow alarms
- Semiconductor plant
- OEM applications
Titan flowmeters - 800 Series flow turbine meter
e.g. 865-VOP-O is a flow range of 0.25 to 6.5 L/Min, VitonTM seal, standard, PVDF bodied flowmeter with a 6 point traceable water calibration.
Flowmeters: 800 Series flow turbine meter, materials of construction
- Body and cap - PVDF
- ‘O’ Ring Seal - Viton
- Magnets - Ceramic
- Bearings - Sapphire
At the heart of the meter is a precision turbine that rotates freely on robust sapphire bearings and contains chemically resistant ceramic magnets that are detected through the chamber wall by a Hall effect detector. The output is a stream of NPN/PNP pulses that are readily interfaced with most electronic display or recording devices. This combination of materials and technology ensures a long life product with reliable operation throughout. There are two temperature options 125°c or 60°c. The 60°c unit is fitted with two LEDs to monitor the power and pulse output, both NPN and PNP transistor outputs are available on each flow meter
Flowmeters: 800 Series flow turbine meter Instruction Sheet
The principle of operation is very simple. A jet of liquid is directed at a free running Pelton wheel turbine in a specially shaped chamber. The rotation of the rotor is detected with a Hall Effect sensor. The output frequency of these pulses is directly proportional to flow rate and the total number of pulses the total volume passed. The standard bearing material is sapphire as this gives a long trouble free life to the meter. Non-metallic options mean that these meters may be used with very aggressive chemicals and ultra-pure water.
800 Series flow turbine meter - Installation
The pipe work must be designed in such a way to eliminate reverse flow, and the flow passes through the meter in the direction of the arrow. The meter should be installed in a position that prevents it from draining down as on start-up serious damage could result by “impacting” an empty flowmeter with a high velocity fluid stream. The fluid should be clean and homogenous and in the case of optical detection, be able to transmit infra-red light. In all cases an upstream filter of at least 80 microns must be fitted. It is recommended that before the flowmeter is installed in the line a “dummy” section of pipe is inserted and the system flushed. This is to eliminate any debris in that section of the line. The pipe must not stress the body of the meter and should be fully supported either side with appropriate isolation valves and in some cases a by-pass valve. When screwing fittings into a threaded body always place the second spanner next to the fitting being inserted, never tighten one fitting against the other across the meter body as this will distort the body and damage the sapphire bearings. On initial start-up increase the flow slowly to ensure no over speeding of the meter occurs as the air is forced from the line. This is best achieved by monitoring the flow rate and ensuring that a 50% over-range is not exceeded. Never blow a flowmeter with an airline. Care should be taken to ensure that no air enters the system (e.g. leaky pump gland) or that no cavitation takes place. With a volatile liquid we recommend at least twice the vapour pressure plus 1 Bar as the operating pressure. The user must ensure that the materials of construction are compatible with their fluid. We accept no responsibility for material compatibility; it is the users’ responsibility.
800 Series flow turbine meter - Electrical Characteristics
Hall effect sensorsSupply voltage: 4.5-24Vdc
Temp range: -20 to 125°C
Rise & fall times: 1.5uS max
Supply current: 7.5mA typ.
Switch current: 10mA max
It is recommended that all “signal” cables are screened and run separately to power lines and switched inductive loads and are located well away from inverters and other “noisy” apparatus. Always use sound wiring practice. Both Hall effect and optical detectors (NPN) require an external pull-up resistor connected between the output and a suitable power supply to attain a pulse. Typically the flowmeter PSU may be used but sometimes a dc pulse, which is of a different voltage, may be required e.g. using a PLC with a 24V PSU and an internal 5V rail for the pull-up resistor/pulse input.
Titan Flowmeters: 800 Series flow turbine meter commissioningIf problems occur during commissioning always check the fundamentals first.
- Is the flowmeter/instrument the correct one for the installation?
- Is the power connected to the meter and the instrument, and is it turned on?
- Is the instrument set/wired correctly? I/P port, pulse type, frequency span, units etc.
- Where possible check the O/P from the flowmeter with an oscilloscope before proceeding
- Was the line flushed prior to installing the meter?
- Was the flow increased slowly?
If you cannot find a solution ask your supplier for technical support.