GPI GM007 series Instruction Manual

MS499G

0603
0003

Positive Displacement Flowmeters

GM007 series instruction manual

GM007 Pulse Meter From serial No. CXXXX

Thank you for purchasing a GPI GM

Series Flow Meter. Please take a few

minutes to read through this manual

before installing and operating your

meter. If you have any problems with

the meter, refer to the maintenance

and trouble shooting sections of this

manual.

This manual contains connection and

operating instructions for the GM007

Series meters with pulse outputs. For

models with displays an additonal

instruction manual is supplied. [If you

need further assistance, contact your

local GPI representative or contact

GPI by telephone or fax.]

The GPI GM Series Flow Meter has

incorporated the oval rotor principal

into its design. This has proven to be a

reliable and highly accurate method

of measuring flow. Exceptional

repeatability and high accuracy over a

wide range of fluid

viscosities and flow rates are features

of the GM Series flow meter design.

The low pressure drop and high

pressure rating means the GM Series

flow

meter is suitable for both gravity and

pump (in line) applications.

The GPI GM Series flow meters are

available in aluminum, 316 stainless

steel, or PPS. Standard rotors are made

from PPS (Polyphenylene Sulfide

Resins) with optional 316 stainless

steel rotors available for either

stainless steel or aluminium models.

PLEASE READ THIS INFORMATION

CAREFULLY BEFORE USE!

Before use, confirm the fluid to be used

is compatible with the meter (refer to

the GPI fluid compatibility chart), or

consult your local GPI distributor for

advice.

To prevent damage from dirt or foreign

matter, GPI recommends a Y or Basket

type 60 mesh strainer be installed as

close as possible to the inlet side of the

meter (if required contact GPI for

further information).

Note: When a strainer is installed it

should be regularly inspected and

cleaned. Failure to keep the strainer

clean will dramatically effect flow

meter performance.

To prevent damage to the meter slowly

fill the system with fluid (this will

prevent damage caused by air purge).

Note: Failure to do this could damage

the meter.

For pump applications, turn off the

pump at the end of each day.

Maintenance can be carried out to the

liquid crystal displays and pulse units

without removing or isolating the meter

from the line. When maintenance to

any other part of the meter is required,

the meter must be isolated and the line

pressure reduced.

The reed switch pulse unit can cause

inaccurate rate counts when used with

high speed counters. It is advised that

a debounce circuit be used or

alternatively use the hall effect sensor

option.

1

To the owner

Important Information

1] GPI recommends that when setting

up pipework for meter installations

a bypass line be included in the

design. This provides the facility for

a meter to be removed for

maintenance without interrupting

production. (See Fig.1)

2] Use thread sealant on all pipe

threads.

3] For pump applications ensure pipe

work has the appropriate working

pressure rating to match the

pressure output of the pump.

4] Install a wire mesh strainer (Y or

basket type 60 mesh as close as

possible to the inlet side of the

meter.

5] Ensure that the meter is installed so

that the flow of the liquid is in the

direction of the arrows embossed

on the meter body.

6] The meter can be installed in any

orientation as long as the meter

shafts are in a horizontal plane.

(Refer to Fig.2 for correct

installation) The register assembly

may be orientated to suit the

individual installation.

Note: Incorrect installation can cause

premature wear of meter

components.

7] Do not over tighten meter

connections.

8] It is important that after initial

installation you fill the line slowly,

high speed air purge could cause

damage to the rotors.

9] Test the system for leaks.

10] Check the strainer for swarf or

foreign material, after the first 200

litres check periodically,

particularly if the flow rate

decreases.

2

Installation

When fluid passes through the meter,

the rotors turn. The magnets which are

located in the rotors will pass across

the pulser circuit board (containing

either Reed switches or Hall Effect

sensors). A signal is received which is

then sent by the Pulse Circuit Board

(PCB) to the relevant LC display or

receiving instrument.

Operation

1

2

Bypass Line

Flow Outlet

Flow Inlet

Strainer

Do Not Install Meter This Way