Installation and Commissioning
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Manual TRZ 04 · EN04 · February, 1st 2017
35
2.5.2
Mechanical drive shaft coupling
Type “G-D” meter head provides a mechanical drive shaft where additional equipment,
e.g. slip-on pulse transmitters, volume correctors, etc., can be attached under official
supervision.
Before you connect additional mechanically driven equipment, you must make sure that
the direction of rotation and the rotation rate U
a
(see chapter 5 Specifications) comply with
the data on the gas meter. The torque required for driving the additional equipment must
not exceed the value stated on the indicating plate of the drive shaft.
Figure 5: Dimensions of the drive shaft coupling
2.5.3
Connection of additional equipment
The drive shaft couplings of the meter head (type “G-D”) can be used for connecting
additional mechanical or electronic measuring instruments. In this case, the total driving
torque must not exceed the approved value. If no additional equipment is used, the drive
shaft couplings are sealed.
The rotation rates of the drive shaft coupling depend on the meter size (see table).
ø 25
ø 6
2
M6
9
14
,7
20
,7
24
,5
6
H7
