Tokheim MP-T1 - Calibration Error Analysis; External Leakage Identification

Document Ref 903158-001 Page 23
Component Technical Manual MA26 MP-T1 Meter for Fuel Dispensers
3.2 Calibration error
Positive display error / not enough liquid in the can:
❍
❍❍
❍ External leakage
Adjust the meter (see section 1.1.7)
Negative display error / Too much liquid in the can.
❍
❍❍
❍ Adjusting cam damage
If low flow error higher than max flow error over 0.5 %:
❍
❍❍
❍ Internal leakage through :
-piston seals
-diaphragm
-rotary valve
100.90
100.80
100.70
100.60
100.50
100.40
100.30
100.20
100.10
100%
99.90
99.80
99.70
99.60
99.50
99.40
99.30
99.20
99.10
3.3 External Leakage
Leakage : ❍...through the drive shaft: lip seal faulty
❍...under the collector : collector O-ring faulty
❍...under a cover: cover O-ring faulty
❍...through the adjustment axle: adjustment axle O-ring faulty
❍...under the bottom cover : bottom cover O-ring faulty
Issue A