Max H242, H241 User Manual

H-Series Positive Displacement - Helical Flow Meters

Operational Manual

H241, H242

Model H241

Model H242

Table of Contents

Before You Install ...................................................................page 3

Meter General Description ...................................................page 3

Transmitter General Description ...................................... page 4

Meter Speciﬁ cations ..............................................................page 5

Do and Don’ts ..........................................................................page 5

Transmitter Speciﬁ cations - Analog ................................ page 6

Transmitter Speciﬁ cations - Frequency (Pulse) .............. page 7

Installation ...............................................................................page 8

Piping Diagrams ......................................................................page 9

ANSI FlangeANSI Flange Stud Torque ..............................page 9

Operation ............................................................................... page 10

Troubleshooting .....................................................................page 13

Flow Meter pressure drop curves

Contact for Repairs & Calibration Services ....................

Part number matrix ............................................................. page 15

Limited Warranty .................................................................. page 16

Custom Instructions for Hazardous Locations/Explosion Proof Housing:

http://www.maxmachinery.com/content/explosion-proof-installation-instructions

page 14

DO NOT ATTEMPT TO INSTALL OR START FLOW METER WITHOUT READING THIS ENTIRE MANUAL

Max Machinery, Inc. (MMI) 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 speciﬁ cations 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.

Before You Install

Thank you for choosing to install a Max Machinery precision ﬂ ow meter. To ensure the best experience please take a moment to read through this manual prior to installation.

When you purchased this meter a ﬂ ow engineer helped determine many of the factors that will be reviewed on the following pages. You may ﬁ nd it useful to ﬁ ll out the form below and keep it in your ﬁ les for reference.

When you are ready to do the installation there will be a few tools you will need:

Meter Installation: The meter and transmitter A signal cable (available from factory) The display or signal processing device

Many Max meters are installed and operate for decades, so having the following information in your records may prove useful. We have provided this outline as a starting point.

Process Temperatures ___________________________ Fluid Viscosity ____________________________________

Operating Range ________________________________ Line Pressure ____________________________________

Max Sales # or PO # _____________________________ Installation Date __________________________________

Indicator Manual Calibration Certiﬁ cate Bypass plumbing supplies

Meter Model # __________________________________ Meter Serial # ____________________________________

Notes: _____________________________________________________________________________________________

_____________________________________________________________________________________________

Meter General Description

The Max H-Series Flow Meters are positive displacement helical rotor type units capable of precise measurements over a wide range of ﬂ ow rates and ﬂ uid viscosities.

The two sizes of this series (H241 and H242) will measure ﬂ ows from 0.1 L/min to 500 L/min. Material viscosities between 3 and 1,000,000 centipoise may be accommodated.

In a helical rotor type ﬂ ow meter, a precise amount of the ﬂ uid being measured is trapped between the rotors as they turn. This motion is used to turn a gear coupled to a magnet. An external transmitter senses the motion of the magnet and converts this signal into a voltage, pulse or 4-20 mA current ﬂ ow rate output. For some transmitter models, the magnet is eliminated and the motion of the gear itself is sensed.

The Max H-Series Meters are of simple and rugged construction. They can be expected to perform superbly if treated within the conﬁ nes of the design envelope. For this reason, it is important to read this manual and understand the operational requirements and limits of the meter.

Our Technical Service staff will be happy to answer any questions that this manual does not cover.

Transmitter General Description

Max transmitters are designed to work with the entire family of Max Flow Meters to provide extremely precise ﬂ ow measurement in a cost effective package. Different options of industrial housings or IP66 rated explosion proof enclosures, combined with a choice of one-part and two-part, high temperature designs with remote electronics cover a wide range of application environments – from the laboratory to harsh industrial processes.

This latest generation of transmitters use modern sensor technology coupled with advanced signal processing to deliver high levels of performance and reliability. Hall sensors are used to detect the position of a driven magnet inside a Max Flow Meter. Changes in position are tracked by a microprocessor, which generates an output proportional to the ﬂ ow rate. Advanced signal processing provides both ﬁ ne angular resolution (0.36 degrees rotation) and rapid response (output updated every one millisecond).

Max transmitters are typically mated to a mechanical ﬂ ow meter, conﬁ gured, and calibrated at the factory as a set. This ensures accuracy and allows quick setup in the ﬁ eld. For ﬁ eld installations where the transmitter has not been set up with a meter at the factory, an optional serial interface kit may be purchased to give full access to conﬁ guration options and parameters.

Transmitter Features

High resolution measurement –

Analog Output: Conﬁ gured output ranges to any value within ± 10 Vdc or ± 20 mA.

Frequency Output: Conﬁ gured output resolution of 1 to 1000 pulses per revolution. Linearization of up to 16 points to fully describe the ﬂ ow meter’s output curve and achieve the highest system linearity over the meter’s entire operating range.

Compensation Algorithm – Compensates for variations in Hall sensor and ﬂ ow meter characteristics to provide a stable, undamped output that accurately represents the instantaneous ﬂ ow rate. This feature is factory set when the meter and transmitter are mated together. If the transmitter is changed, the compensation can be performed via a button on the circuit board.

Anti-Dither Buffer - Masks the false output that may occur at very low ﬂ ow rates in the presence of vibration or hydraulic noise. If the meter reverses direction the output signal will be interrupted for a user selected portion of a meter rotation. Reverse ﬂ ow exceeding the buffer setting will result in an output proportional to reverse ﬂ ow rate. The buffer quantity can be set from 1% to 100% of a revolution.

Ex Proof Housing

Industrial Housing

Meter Speciﬁ cations

Model H241 H242

Maximum ﬂ ow rate,

Gal/min 50 132 Liters/min 189 500

Maximum pressure, bar (psi)

Standard NPT* 35, (500) 35, (500) 1500 lb ANSI RF ﬂ anges --- 245 (3500) 2500 lb ANSI RF ﬂ anges 245 (3500) ---

Pressure drop, bar (PSI)

Operating maximum 10 (150) 7 (100) Absolute maximum 21 (300) 15 (200) 100% ﬂ ow, 3 CPS 1 (14) 0.7 (10)

Maximum temperature Up to 225° C (435° F)

Recommended ﬁ ltration 150 micron Displacement, L/Rev 0.062 0.182 Weight, Kg (Lb) 13.6 (30) 18.2 (40)

Typical K-Factor, (pulses/liter) 15000 5000

Port size NPT 1.5” 2.5” ANSI RF ﬂ anges 1.5” (DN40) 2.5” (DN65) *Flange size for low pressure meters 600 lb ANSI RF 900 lb ANSI RF

Notes:

For viscosities of 3 CPS or less. Derate per pressure drop curves for higher viscosites.

Limited by meter seal material, transmitter model, orientation and ambient temp. See manual. Consult factory.

Some materials may have different ﬁ lter requirements. Consult factory

Typical. See ﬂ ow meter/transmitter calibration sheet for actual K-factor and accuracy data.

Dos and Don’ts

DO: DON’T:

• Install a bypass line around the meter

• Clean the ﬁ lter on a regular basis

• Purge air from the meter before operating your system (Flowing near the meters maximum ﬂ ow rate for a given viscosity will purge air bubbles. Tilting, tapping or shaking the meter at lower ﬂ ow rates will also dislodge entrapped air)

• Run water or aqueous solutions through the meter (except the 234 Series of meters)

• Put steam or compressed air through the meter.

• Disassemble the meter

• Apply excessive differential pressure across the meter

• Exceed the maximum ﬂ ow rates or pressure ratings for your meter

• Let materials solidify in the meter

• Try to pump through the meter if it contains frozen material. Re-melt the material completely before trying to pump through the ﬂ ow meter.

+ 11 hidden pages

Max H242, H241 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual