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Max Machinery 284-512 SERIES Instruction Manual

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INSTRUCTION MANUAL
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 3
Temperature Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 5
Signal Transmission Data . . . . . . . . . . . . . . . . . . . . . . Pg 5
Temperature Limit Graphs . . . . . . . . . . . . . . . . . . . . . . Pg 6
Signal Transmission Graphs . . . . . . . . . . . . . . . . . . . . Pg 7
K-Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 8
Photo Disk Assembly . . . . . . . . . . . . . . . . . . . . . . . . . Pg 9
General Flow Metering Considerations . . . . . . . . . . . . Pg 10
All schematics are available 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 ensure accuracy of the information contained in this
Instruction Manual, MMI assumes no responsibility for inadvertent errors.
284-512 SERIES
TRANSMITTER

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Summary of Contents for Max Machinery 284-512 SERIES

  • Page 1: Table Of Contents

    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.

  • Page 2: General Description

    The 284-512 can operate from a voltage source of 4.5 volts to 30 volts. A wide range on board regulator protects the circuitry from transient supply noise. No adjustments are required for different supply voltages. Page 2 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc.

  • Page 3: Specifications

    (The temperature of the material flowing through the flow meter will typically affect the operating temperature of the transmitter, see page 7). * Sourcing. The 5V sink current is 32mA. Continuous short circuit is not recommended. 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 3...

  • Page 4: Installation

    In this case, it is advantageous to connect the circuit common to case via the capacitors (filter). This will give some extra immunity to electrical noise. Page 4 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc.
  • Page 5 Installation 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 5...

  • Page 6: Temperature Limits

    Figures 6 and 7. Figure 6 is for the 284 in a vertical position; Figure 7 is for the 284 in a horizontal position. Page 6 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc.

  • Page 7: Signal Transmission Data

    = 37,736 Hz (frequency = 1/time). This frequency is well above what any flow meter will develop. Generally, the 284-512 Series transmitters will drive 1000 feet or more of cable with no problem. 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 7...

  • Page 8: 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. Page 8 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc.

  • Page 9: Photo Disk Assembly

    About a 0.005 gap should be left, which allows the disk some freedom of movement. The spring keeps the disk and shaft in synchronization. 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 9...

  • Page 10: General Flow Metering Considerations

    Piston pumps with fewer than three pistons create a particularly large amount of bothersome ripple and result in a very slowly responding system. Page 10 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc.
  • Page 11 The electronic converter of any meter will add its share of noise. For instance, DC transmitters produce some ripple in their output due to the sinusoidal nature of the induced voltage in the armature coils. 284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 11...