Instruction Manual

ManualsBrandsMax Machinery ManualsEquipment272-5X8 BIDIRECTIONAL TRANSMITTER (210_240 SERIES FLOW METERS)

INSTRUCTION MANUAL

272-5X5 ANALOG TRANSMITTER

(210 SERIES FLOW METERS)

272-5X7 ANALOG TRANSMITTER

(220/240 SERIES FLOW METERS)

272-5X8 BIDIRECTIONAL TRANSMITTER

(210/240 SERIES FLOW METERS)

TABLE OF CONTENTS

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

Installation:

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4

Moisture Protection . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pages 4-5

Electronic Protection . . . . . . . . . . . . . . . . . . . . . . . . .Page 5

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6

User Options and Adjustments:

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7

Output Voltage Span . . . . . . . . . . . . . . . . . . . . . . . . .Page 8

PCA Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8-9

Over Range Indication . . . . . . . . . . . . . . . . . . . . . . .Page 11

Ripple Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11-12

General Considerations:

Response Rate, Accuracy . . . . . . . . . . . . . . . . . . . . .Page 13

Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14

Schematics:

272-515-200

272-517-200

272-518-200

181-000-250

272-515-201

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.

Discontinued

Summary of content (18 pages)

PAGE 1
INSTRUCTION MANUAL 272-5X5 ANALOG TRANSMITTER (210 SERIES FLOW METERS) 272-5X7 ANALOG TRANSMITTER (220/240 SERIES FLOW METERS) 272-5X8 BIDIRECTIONAL TRANSMITTER ed (210/240 SERIES FLOW METERS) TABLE OF CONTENTS D is co nt in u General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3 Installation: Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
GENERAL DESCRIPTION The 272 Series Transmitters convert the rotary motion of a flow meter into a voltage proportional to flow. A magnet sealed within the flow meter housing rotates in step with the metering elements. The varying magnetic field is sensed by an external stator with a two phase winding. The resulting AC voltage is scaled and converted to DC. ed The 272-5X8 Transmitters use two Hall Effect sensors in addition to the stator coil to measure the position of the magnet as well as its velocity.
PAGE 3
SPECIFICATIONS Output Voltage Range Accuracy Typical Typical Typical Maximum ed 272-5X5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 to 10V 272-5X7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 to 10V 272-5X8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 to ±10V 13.5 V in u Linearity (input RPM vs Output Voltage) . . . . . . . . . . . . . . . . .0.05% 0.
PAGE 4
INSTALLATION OF Model 272 TRANSMITTER (Mounting, Protection) Mounting: The Model 272 transmitter screws on and off of the flow meter. Because of the random location of the starting point of the threads, one transmitter will probably not line up with the “in” and “out” ports of the flow meter like another will. The electrical outlet of the transmitter can be rotated clockwise or counter clockwise one turn by loosening the clamping screw at the base of the transmitter housing.
PAGE 5
INSTALLATION OF Model 272 TRANSMITTER (Dimensions) Temperature Considerations: (continued) The stator of the Model 272 transmitters is insulated with an epoxy that is rated to 125°C. This limits the maximum flow meter fluid temperature to 130°C when using the Models 272-5X5 or 272-5X7. The 272-5X8 bidirectional transmitter uses Hall effect devices that are rated to 90°C. This is the maximum fluid temperature when using the Model 272-5X8.
PAGE 7
USER OPTIONS AND ADJUSTMENTS Transmitters calibrated at the factory with a flow meter are shipped with a calibration sheet and will not require further adjustment. Transmitters shipped alone will have to be phased to the flow meter and wet calibrated. Grounding Switches: S2-1: This switch connects circuit common to the transmitter case through two back to back 15 µF @ 20V capacitors. S2-2: This switch connects common and case ground directly together.
PAGE 8
USER OPTIONS AND ADJUSTMENTS (PCA Drawings) Information for 272-5X5 transmitters: Removable Connector Amphenol Connector (Std. on 272-515) (See Grounding Options Below) S2-1 Filter S2-2 Ground Fine Gain Trimmer 2.5:1 Output Overrange LED Ground Common +15V Signal (A) (B) (C) (D) -15V (F) ed Green Black Red White Blue in u Range Switch 2.
PAGE 9
USER OPTIONS AND ADJUSTMENTS Information for 272-5X7 transmitters: Removable Connector Amphenol Connector (Std. on 272-517) Green Black White Red Blue (A) (B) (D) (C) (F) in u ed S2-1 Filter S2-2 Ground Output Overrange LED Fine Gain Trimmer 2.5:1 Ground Common Signal +15V -15V nt Range Switch 2.15:1 6 Steps S2-1 Filter S2-2 Ground co Information for 272-5X8 transmitters: Fine Gain Trimmer 2.5:1 is Output Overrange LED Offset Trimmer Removable Connector Amphenol Connector (Std.
PAGE 10
USER OPTIONS AND ADJUSTMENTS Table I list the approximate volumetric displacements of flow meters that can be used with the 272 transmitters. Use this table to calculate the RPM of the flowmeter at maximum flow. TABLE 1: METER MAXIMUM FLOW AND DISPLACEMENT FLOWMETER MODEL MAXIMUM FLOW CC/MIN DISPLACEMENT PER REVOLUTION GAL/MIN CC 1,800 0.48 0.870 214 10,000 2.64 215 40,000 10.6 216 100,000 26.
PAGE 11
USER OPTIONS AND ADJUSTMENTS (Over Range Indication) Output Over Range Indication: This LED will start to blink if the transmitter output amplifier begins to saturate (clip). This happens when the flow rate or gain is too high and will cause the output voltage to be less than it should be. Figure 9 shows what happens as output saturation occurs. nt in u ed The diagram below shows what happens as output saturation occurs. D is co The flow rate in a system may have as much as 50% to 100% ripple.
PAGE 12
USER OPTIONS AND ADJUSTMENTS If this is not done, the electrical output of a meter and its transmitter will have as much as 50% ripple superimposed on the DC component of the output signal. The frequency of this ripple will be four times the RPM of the meter. Such a situation will require more damping than otherwise and will result in a slower responding system. Ripple Adjustment Sensitivity: Increases and decreases the sensitivity of the ripple detection circuit.
PAGE 13
GENERAL CONSIDERATIONS (Response Rate, Accuracy & Noise) Response Rate & Accuracy: There is always a trade off in a metering system between response rate, accuracy and noise. The three are related such that their product equals a constant. If any one of them is made smaller, the others can be made larger. nt in u ed In most metering systems, response rate and accuracy are desirable characteristics. To maximize one or both of these parameters, noise should be reduced to a minimum.
PAGE 14
GENERAL CONSIDERATIONS Nosie: in u All positive displacement flow meters add noise to a flow metering system. The noise is typically of two origins. As the elements of the meter rotate, they require varying amounts of pressure to move (See Fig. 13). ed Noise can be defined as any change in either the fluid flow or the electrical system that is not a meaningful change in the flowlow or th electrical system that is not a meaningful change in the flow rate.
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