Tokheim MA26 User 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 All A Original Issue

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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
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.
Thealternativelinear motion of the pistons thereforeresultsin 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) RecommendationR117.
Thecertificateis 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.