Tokheim MA26, MP-T1 Technical Manual

MA26 Meter &

MP-T1 Pulser

Component

Technical Manual

Document Ref 903158-001
Rev - 1
10/2001

Document Ref 903158-001

MA26 MP-T1 Meter for Fuel Dispensers Component Technical Manual

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Issue A

Document Ref 903158-001 Page 1

Component Technical Manual MA26 MP-T1 Meter for Fuel Dispensers

REVISION RECORD

Date Revision Page Issue Reason
18/10/ 2001 1 A l l A Original Is s ue

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MA26 MP-T1 Meter for Fuel Dispensers Component Technical Manual

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Component Technical Manual MA26 MP-T1 Meter for Fuel Dispensers

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CONTENTS

1. PURPOSE / DESCRIPTION ...........................................................................................6

1.1 MA26 Piston Meter ................................................................................................ 6

1.1.1 Purpose ...................................................................................................6

1.1.2 Description ............................................................................................. 6

1.1.3 Technical Specifications.........................................................................7

1.1.4 Approvals ............................................................................................... 7

1.1.5 Dimensions .............................................................................................8

1.1.6 Meter Operation ..................................................................................... 9

1.1.7 Adjustment ............................................................................................. 9

1.2 MP-T1 Pulser........................................................................................................10

1.2.1 System Description...............................................................................10

1.2.2 Functional Partition of the MP-T1 electronics..................................... 10

1.3 MA26 MP-T1 Sealing ..........................................................................................13

2. PARTS LIST....................................................................................................................16

2.1 MA 26 Meter ........................................................................................................16

2.2 MA 26 Collector ................................................................................................... 18

2.3 MA26 Bottom Cover ............................................................................................ 19

2.4 MP-T1 Pulser, Gears and Totaliser ....................................................................... 20

3 TROUBLE SHOOTING ................................................................................................22

3.1 Piston Meter Blocked ...........................................................................................22

3.2 Calibration Error ...................................................................................................23

3.3 External Leakage .................................................................................................. 23

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MA26 MP-T1 Meter for Fuel Dispensers Component Technical Manual

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Component Technical Manual MA26 MP-T1 Meter for Fuel Dispensers

Issue A

CONTENTS

1. PURPOSE / DESCRIPTION ...........................................................................................6

1.1 MA26 Piston Meter ................................................................................................ 6

1.1.1 Purpose ................................................................................................... 6

1.1.2 Description ............................................................................................. 6

1.1.3 Technical specifications ......................................................................... 7

1.1.4 Approvals ............................................................................................... 7

1.1.5 Dimensions .............................................................................................8

1.1.6 Meter operation ......................................................................................9

1.1.7 Adjustment ............................................................................................. 9

1.2 MP-T1 Pulser........................................................................................................10

1.2.1 System description ...............................................................................10

1.2.2 Functional partition of the MP-T1 electronics .....................................10

1.3 MA26 MP-T1 Sealing ..........................................................................................13

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MA26 MP-T1 Meter for Fuel Dispensers Component Technical Manual

Issue A

1 PURPOSE / DESCRIPTION

1.1 MA26 Piston Meter

1.1.1 PURPOSE

The MA26 meter has been designed to provide accurate measurement of
traditional fuels using a positive displacement system.

1.1.2 DESCRIPTION

The meter is made up of a body containing four sleeved cylinders which in turn
contain four pistons. These pistons move in connection with two transmission
rods. Rollers connected to a crankshaft move within the groove of these rods.
The alternative linear motion of the pistons therefore results in a rotary crankshaft
movement.

A valve is driven by the crankshaft, successively putting the cylinders in
communication with the meter inlet and outlet. The valve glides between a
slide plate integrated to the body and a gasket fixed to the outlet collector. The
slide plate has four holes, which are connected to the four cylinders. The link
between the gasket and the outlet collector is made via a Teflon diaphragm,
which acts as a seal between intake and exhaust.

The upper section of the crankshaft drives the indicating device.

Pulser
MP T1

Fuel
Entry

Calculator

Fuel
Exit

Meter MA 26

Totaliser

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Component Technical Manual MA26 MP-T1 Meter for Fuel Dispensers

Issue A

1.1.3 TECHNICAL SPECIFICATIONS

Characteristics UNITS VALUE
Displacement : Litre 0.700

Maximum flow-rate : l/mn 83

Minimum flow-rate : l/mn 5

Accuracy within the flow range : % ± 0.3

Maximum service pressure : bar 4

Maximum torque during delivery : Nm 4

Pressure drop without torque : bar 0.08 5 l/mn

0.12 40 l/mn

0.15 50 l/mn

0.26 80 l/mn

Adjusting device operating range : % ± 1.1

Environmental Conditions

Climate : marine, tropical, industrial and polar

Ambient temperature range : - 25°C to + 55°C.

Fuel temperature : - 25°C to + 55°C.

Atmosphere : In accordance with climate.

1.1.4 APPROVALS

Metrological

European Approval : 01.00 . 422.003.0 (21 June 2001)

The MA26 meter is a measurement transducer for use in a measuring instrument
for liquids other than water. As such it is tested and certified according to the
OIML (Organisation International de Metrology Legal) Recommendation R1 17.
The certificate is issued under number R117(1995)-NL-01.04 by the NMi (Dutch
national test institute).

Safety

The MA26 meter with the MP-T1 pulser is constructed for use in gasoline
dispensers in a zone 1 area. Therefore the pulser, as an electrical part, has been
approved by LCIE according the European Standard EN 50014 and EN 50018
with protection code EExdIIBT6 with certificate number DEMKO

00.E.128709X.