Landis+Gyr 750, Инструкция по установке, пусконаладке и обслуживанию

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Model 750 Gas Meter
Installation, Commissioning and Maintenance Manual
Page 4 of 17
© Gyr 17-May-2016
Due to continuous product development the details above are subject to change without notice. Whilst Gyr has taken all reasonable
care in reviewing the information in this document, Gyr makes no representations in respect of, gives no guarantees or undertakings in
relation to, and to the maximum extent permitted by law, excludes all warranties in relation to, the accuracy or completeness of the information
in this document. Prospective users of this information should make their own enquiries as to its accuracy and reliability.

Pulse Ready Meter: All meters are fitted with a
magnet in the last index wheel and hence each
meter is pulse retro fittable in the field 1 pulse / 10
lts.

Pulse Output Module: 10 litres per pulse using
IN-Z41 pulse module.

Weight: 2.7 kg ( 5.95 lb. ).
OVERALL DIMENSIONS
MATERIAL OF CONSTRUCTION
For more details refer to Document Number 750004 :
Model 750 Material, Weight and Recyclability.
Table 1 : Materials of Construction
Material
Housing Diecast Aluminium
Centre Block PBT - polybuylene terephthalate
Grid & Valves PF - Phenoplastic
Diaphragm
Plates & Pans Steel
Rods, Shafts Steel
Valve Guide Steel
Diaphragms Moulded PET and Elastomer
Index window PC - UV Stabilised
Polycarbonate
Red Security
Seals POM - polyoxymethylene,
commonly called acetal
O Ring Seals Nitrile Rubber
Screws Carbon Steel with Molybond
Coating
SCREW TORQUE SPECIFICATIONS
Table 2 : Torque Specifications for Screws
Part Number Torque in Nm
Top Case Screws
p/n 610019 Qty 4
4.5
– 5.0
Tapping Point Screw
p/n 204006 Qty 1
1.5
– 2.0
Index screws
p/n 750021 Qty 4
1.5
– 2.0
METER ACCURACY
Model 750 Accuracy Curve
-5
-4
-3
-2
-1
0
1
2
3
4
5
0 1 2 3 4 5 6 7
Flow Rate Sm3/hr
P
e
rc
e
n
ta
g
e
E
rr
o
r
7.5
The 750 is built for a service life of many years and to
an initial accuracy of better than +/- 0.75% error.
Table 3 : Accuracy Band
Flow Rate
Accuracy
( % Error )
0.01 m3/hr +/- 5%
0.030 m3/hr +/- 3%
0.12 m3/hr +/- 1.5%
1.2 m3/hr +/- 1%
6.0 m3/hr +/- 1%