Max Machinery 284-512 SERIES Скачать руководство пользователя | Manualshive

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Содержание 284-512 SERIES

Страница 1: ...ailable by contacting MMI Technical Service 286 700 010 284 510 200 181 000 250 284 512 350 1990 Rev 6 97 Max Machinery Inc Max Machinery Inc reserves the right to make changes to the product in this Instruction Manual to improve performance reliability or manufacturability Consequently contact MMI for the latest available specifications and performance data Although every effort has been made to ...

Страница 2: ...n antidither feature which makes it useful for low flow zero velocity applications which may involve momentary reverse flows A memory circuit will hold up to 128 pulses of negative flow outputting only the net forward flow The two phase output is useful for bi directional applications Both outputs are CMOS and TTL compatible and are generally able to drive at least 1000 feet of shielded cable The ...

Страница 3: ...l Time 2 5K Load 0 4 µs 90 Output Frequency Maximum 6000 Hz Minimum 0 0 Hz Antidither Range Single Phase Only 128 cycles 1 28 revolutions Disk RPM Maximum RPM 3600 RPM Minimum RPM 0 0 Temperature Limits Storage 65 C to 80 C Operating 15 C to 65 C The temperature of the material flowing through the flow meter will typically affect the operating temperature of the transmitter see page 7 Sourcing The...

Страница 4: ...ws under the housing see drawing on Page 5 Connections The facing page shows the terminals and their functions When connecting wires to the screw terminal versions make sure the lead wires do not rub on the arbor This arbor rotates and rubbing wires will affect accuracy and may eventually cause a short circuit Grounding Two dip switches are provided The ground switch when activated connects the ci...

Страница 5: ...284 512 350 1990 Rev 6 97 Max Machinery Inc Page 5 Installation D i s c o n t i n u e d ...

Страница 6: ...iods from 50 to 85 C although this is not recommended The 284 is thermally connected to the flow meter body For this reason the temperature of the 284 will be a function of ambient temperature and the flow meter temperature The limit of these two temperatures is interrelated which is shown in Figures 6 and 7 Figure 6 is for the 284 in a vertical position Figure 7 is for the 284 in a horizontal pos...

Страница 7: ...gure 9 provides the relationship between output capacitance loading and rise and fall time for the 284 512 output signal For instance at 0 04 µf the rise time of the 284 is about 18 µ sec the fall time is about 8 5 µ sec Consequently the absolute maximum frequency the 284 could transmit would be 26 5 µ sec 37 736 Hz frequency 1 time This frequency is well above what any flow meter will develop Gen...

Страница 8: ...umber is dependent on the flow meter transmitter combination MAX indicators can be adjusted to display the desired flow engineering units ccs lbs gallons quarts etc by using the K factor Flow meters are individually multi point calibrated at the factory and a graph of the K factor which varies slightly with flow rate provided to the customer A typical calibration sheet is shown below K Factor D i ...

Страница 9: ...friction disk mounted between the arbor of the 284 and the photo disk If the photo disk and shaft assembly is to be disassembled care should be taken when it is reassembled A small trace of molybdenum sulfide grease should be placed on the face and bore of the brass arbor which the photo disk is fastened to The locking collar must not be forced up too tightly against the photo disk About a 0 005 g...

Страница 10: ...ich can typically have anywhere from two digits 1 to 99 to 4 1 2 digits 19 999 of information This equals a resolution of 1 to a maximum of 0 005 respectively The display steadiness is also directly related to it s accuracy For instance a display that jitters from 95 to 105 in a meaningless way is not accurate to one part in 100 1 but only to about 10 parts in 100 10 The basic accuracy of the flow...

Страница 11: ...being trapped between the flow meter and the flow controlling device a pump or valve The second type of noise that must be considered is a result of flow meter geometry and design Because of features such as an oval gear or a piston crankshaft configuration or due to manufacturing tolerances the rotation of the metering elements is not completely uniform For example the 210 series meters utilize f...

Страница 12: ...D i s c o n t i n u e d ...

Страница 13: ...D i s c o n t i n u e d ...

Страница 14: ...D i s c o n t i n u e d ...

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