f screw gear flowmeter for high viscosity liquids u pulsation-free measurement u lowest pressure loss for high viscosity u short response time u up to 1,000,000 centistoke viscosity u high accuracy and wide ranges FHG-1000 shown smaller than actual size. FHG-1000 series FHG-1000 fowmeters measure the fow rate based on the screw pump principle. a pair of rotors ftted precisely into the housing constitutes the measuring element. an integrated gear and non-contact signal pick-up system detects the rotations of the measuring element and converts them to digital pulses. together with the housing walls, the rotor edges form closed measuring chambers in which the fuid is transported from the inlet to the outlet side. the fuid volume put through within one main rotor rotation is the rotation volume, which is divided by the sensing gear and digitized, processed and output in the sensor module. sensor system explanation the non-contact pick-up system consists of two gmr-bridges (sin/cos), which are located in a sensor unit in cartridge design. it detects the movement of the sensing gear and routes the sin/cos-signals to the preamplifer electronics. the preamplifer electronics digitize and amplify the sensor signals and multiply them by a high-resolution interpolator using adjustable settings. the square wave signals are bidirectional and can be utilized by any evaluating instrument as well as computers and plc-controls. the resolution is selectable in steps from factor 1 to 128. in case of an 1-channel evaluation, a separate directional signal is available. an adjustable pulse flter can offset and suppress negative fows (e.g. generated by vibrations) while still in the device. the frequency of the output signals is proportional to the fow (volume fow) and depends on the respective fowmeter size. the frequency range is from 0 to 100 khz. the preamplifer is protected against reverse polarity and incorrect connection. it is suitable for fuid temperatures of -30 to 120c (-22 to 248f) and is mounted directly on the fowmeter. flowmeter selection for the trouble-free, safe and reliable operation of the fowmeters, selecting the correct type and size is critical. because of the wide variety of applications and fowmeter designs, the technical data in the specifcations are of a general nature. certain properties of the devices depend on type, size, and measurement range as well as the liquid to be measured. please contact the omega flow department for detailed information about the appropriate fowmeter for your particular application. electronics a special sensor system detects any movement of the pair of rotors or of the liquid column. for this purpose, a precision gear connected to a shaft of the rotor pair is scanned by a special magneto-resistive sensor. the scanning sensor includes two gmr-bridges (sin/cos) and is housed in a removable stainless steel cartridge case together with a signal conditioning and amplifer unit. the downstream electronics unit features a high- resolution sin/cos-interpolator, which is adjustable with 10 different resolution factors. furthermore, a programmable signal flter is available as well, which can offset unwanted negative pulse sequences up to an adjustable degree. in addition, a signal for a separate direction detection, e.g. in case of a 1-channel evaluation, is provided by the electronics. optionally, this output can be used for the detection of excess fows and temperatures. a f-1
specifi cations frequency range: 0 to 100 khz, adjustable measurement accuracy: 0.5% of measured value with viscosity of > 21 cst repeatability accuracy: 0.05% with same operating conditions materials gray cast i ron model: en-gjs-400-15 (en 1563)/16 mn cr 5 stainless steel model: stainless steel 1.4305/1.4112, others available upon request bearing fluid: dependent as anti-friction bearing or ssic/ wolfram carbide friction bearing seal: standard: fpm optional: ptfe, nbr or epdm fluid temperature: -30 to 120c (-22 to 248f) comes complete with operators manual. ordering example: fhg-1112, cast iron, ball bearing, sae 3 ? 4 6000 psi fanged screw gear meter with fhg-cable, 5 m (16.4') connection cable with m12 5-pin plug and stripped leads. viscosity range: 1 to 1.000.000 cst i nstallation position: any supply voltage: 10 to 28 vdc current consumption: 65 ma at 24 vdc unloaded delay: < 8 s protection class: ip65 power supply supply voltage: u = 10 to 28 vdc; reverse pole protection current consumption: i 0 = 65 ma (at 24 vdc); unloaded delay: t v = 8 s maximum (between scanning and measured value) signal outputs output signal shape: quadrature signals (a, b with 90 phase shift) directional output: positive high (24v), negative low (0.8 to 1v) error output: active high (24v), inactive low (0.8 to 1v) maximum o utput frequency: 100 khz signal voltage output: v ss = 9 to 27 vdc (channel 1, channel 2, error/direction) signal output: current i out = 300 ma maximum at 24 vdc (channel 1, channel 2) to order model no. flow range lpm (gpm) housing material bearing type flange connection fhg-1112 0.5 to 120 (0.13 to 32) cast iron ball sae metric 3 ? 4 " 6000 psi fhg-1122 0.5 to 120 (0.13 to 32) cast iron hard metal sae metric 3 ? 4 " 6000 psi fhg-1212 0.5 to 120 (0.13 to 32) stainless steel ball sae metric 3 ? 4 " 6000 psi fhg-1222 0.5 to 120 (0.13 to 32) stainless steel hard metal sae metric 3 ? 4 " 6000 psi fhg-1114 1 to 500 (0.26 to 132) cast iron ball sae metric 1 1 ? 4 " 6000 psi fhg-1124 1 to 500 (0.26 to 132) cast iron hard metal sae metric 1 1 ? 4 " 6000 psi fhg-1214 1 to 500 (0.26 to 132) stainless steel ball sae metric 1 1 ? 4 " 6000 psi fhg-1224 1 to 500 (0.26 to 132) stainless steel hard metal sae metric 1 1 ? 4 " 6000 psi fhg-1115 4 to 1000 (1 to 264) cast iron ball sae metric 2" 6000 psi fhg-1117 10 to 3000 (2.6 to 793) cast iron ball sae metric 4" 490 psi fhg-cable recommended connection cable 5 m (16.4') long, m12 5-pin shielded, meter plug to stripped leads channel 2 error/direction signal po we r supply + vo l tage po we r supply 0 vo l tage channel 1 pin as signmen t pin 2 pin 1 pin 4 pin 3 pin 5 1 2 34 5 1 2 34 5 f-2
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