Model 750 Gas Meter
Installation, Commissioning and Maintenance Manual
Page 11 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 OUTPUT (OPTIONAL)
Pulse output is provided via a magnetically actuated voltage free
reed switch contacts where the electrical instrumentation
attached provides the power to detect the opening and closing of
the reed switch.
All meters are fitted with a magnet in the last index wheel and
hence each meter is pulse retro-fittable while in service by use
an External Pulse Module without the need to interfere with the
metrology of the meter or the meter seals.
The pulse output is 1 pulse per 10 litres. No other pulse output
values are available.
Picture right shows the Model 750 Meter with Fitted with IN-Z41
Pulse Output Module.
The External Pulse Module can be sealed in place using the
standard lead seal, other options are available.
Table 7 : Pulse Output Modules
Module Number
IN-Z41
Part Number
750087
Number of Reed Switches
one for tamper detection
and one for pulse output
Wire Connections
Cable and Plug
Part Number 32446432
Wire Coding
Green-Brown = Meter Pulse
Yellow-White = Tamper Detect
Tamper Circuit
A normally open tamper circuit is provided to detect external tampering by magnetic
interference.
Voltage Switching Umax
24Vdc
Current Switching Imax
50mA
Power Maximum Pmax
0.25W
Contact Form
SPST-NO Form A Normally Open
