Max P234 User Manual

P234 User Manual

Safety and Precautions

Never run the meter dry or blow compressed air through the meter.

Damage will occur.

Never steam clean the meter. Damage will occur. (Bypass or remove the meter if necessary).

Do not disassemble the meter. Damage may occur.

No serviceable parts inside.

Do not over pressurize the meter. Damage may occur. Maximum pressure is 3000 psi.

Do not operate P234 ow meters in a hazardous environment. For ow meters

rated for ATEX, UL, or cUL Class 1, Div. 1 use in a hazardous environment, contact Max Machinery Sales at 707.433.2662 or www.maxmachinery.com.

Read the entire manual before installing and operating the meter.

Verify the uid to be measured is compatible with the ow meter.

Filter your uid to prevent damage from debris and foreign materials. 10 micron ltration recommended.

Install bypass plumbing around the owmeter to allow for easier servicing and line purging/ushing without damaging the meter.

Follow all local regulations and your company safety procedures when installing, operating, servicing, and maintaining your ow meter.

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Safety and Precautions ........................................................................ i

Table of Contents .................................................................................. ii

How It Works ........................................................................................... 1

Installation ............................................................................................... 1

Mechanical ............................................................................................... 1

Operation ................................................................................................ 2

Electrical ................................................................................................. 3

Field Compensation of Transmitter ..................................................5

LED Functions ........................................................................................ 7

Specications .........................................................................................8

Dimensions .............................................................................................9

Charts ...................................................................................................... 9

Part Matrix .............................................................................................10

Available Accessories ........................................................................... 11

Troubleshooting and Service Request ............................................12

Additional Information Available ......................................................12

Max Machinery, Inc. (MMI) reserves the right to change product specications without notice to improve performance,

reliability, or manufacturability. MMI shall not be held liable for operational, technical, or editorial errors/omissions. Visit our web site for the latest version of this user manual.

Max Machinery, Inc., 33A Healdsburg Avenue, Healdsburg, CA 95448 USA

707.433.2662 | www.maxmachinery.com

P234 User Manual Rev2018A -

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How It Works

Max P234 Precision Flow Meters are positive displacement piston meters that are able to operate over a wide range of ow rates and uid viscosities and are specically designed to be compatible with aqueous based solutions. High accuracy measurement is achieved through precision machined radial pistons that move proportional to the ow. High

resolution outputs are produced by measuring the direction and speed of the pistons and converting the signals to

analog and frequency outputs. Flows can be monitored from 1 cc/min up to 2000 cc/min with uid temperatures from

5 deg C to 90 deg C and a maximum pressure of 3000 psi (210 bar). The meter electronics are protected against water, dust, and most corrosive liquids. The 5-pin Turck connector provided is IP68 and mounts to the meter body via a PG-9

connection that can be adapted to conduit. Optional liquid seal materials may be specied to allow for uid compatibility.

Max Machinery, Inc. designs, manufactures, calibrates, and refurbishes high accuracy, high resolution, precision liquid

ow meters under an ISO 9001:2015 certied quality management system. All Max Precision Flow Meters are tested and calibrated in our lab and provide measurements traceable to NIST. If your calibration certicate is lost or missing,

contact MMI with your meter serial number for a copy.

Installation

Orientation: The P234 mounts vertically with the inlet port on the bottom and the outlet port on the top (See diagram on

page 2). This is the only manufacturer’s suggested mounting that will allow for air to be purged from the system. Air in the system can cause response delays and errors in measurement.

Bypass Valves: Install valves to allow system start-up, lter replacement, or ow meter removal without completely

shutting the system down and draining the lines. See diagram.

Failure to use a bypass at start up may lead to ow meter damage due to debris, overspeeding the meter with air in the

lines, and pressure shock due to initial line surges.

Filtration: A 10 micron lter is recommended on the inlet side of the meter. If measuring bi-directional ow, a lter should be installed on both sides of the ow meter. Materials with brous or non-abrasive particulate matter may need to be run without lters.

Clean Plumbing: Before installing the ow meter, the system lines should be cleaned and free of all debris or

manufacturing particulates. Purging lines with compressed air or steam are typical cleaning methods. Do not use

compressed air or steam on the Max ow meter, damage will occur.

Mechanical

Inlet and Outlet ports may be NPT or BSPP (G-Type). The product part number denes the type of liquid tting. Use the part matrix located on page 10 to determine the type of ports on your product and the Specications section on page 8

to determine the diameter and thread pitch.

The P234 may require additional mounting support beyond the uid connection lines. Additional mounting holes

are located on two opposing sides of the base of the product. These holes are 1/4-20 UNC located 1.125 inches apart horizontally.

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Operation

Determine that the following parameters of your ow metering system are within the specications for the specic meter being used:

Maximum System Pressure (Specications)

Differential Pressure across meter (Pressure Drop Curves)

Maximum Flow Rate (Pressure Drop Curves)

Metered Fluid Temperature (Sales specication, transmitter specications)

If the difference in metered uid temperature versus ambient is greater than 75°F (41.6°C), see the “High

Temperature Start Up” section below.

With valves (#1) and (#2) closed, slowly open valve (#3) (bypass) to clear the lines of foreign particles and air.

Slowly open the inlet valve (#1). Slowly open the outlet valve (#2). Completely close the bypass valve (#3).

No routine maintenance, cleaning, or lubrication of the ow meter is required. A routine lter cleaning schedule

should be established. The system should be shut down if abnormal noises occur or if unusual differential pressures across the meter are encountered.

High Temperature Start Up: For uids above 145°F (62.8°C) based on 70°F (21°C) ambient, a specic procedure is required. To avoid temperature shock, ow should be very slowly ramped up over approximately 5 min per 75°F (41.6°C) over ambient. Start with all valves closed and smoothly open valve #3 to allow bypass ow

around the meter. Then over the calculated time interval for warmup, incrementally open valves #1 and #2 and incrementally close valve #3. If valving and a bypass circuit were not installed, then use supply

pressure control to similarly ramp up ow rate slowly over time.

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