7.1 Operating Methods
The Hydran M2-X can be operated using several methods. Each of these
methods is explained in the following pages, from the simplest to the most powerful
one:
• Periodic, visual monitoring (see Section 7.1.1)
• Alarm monitoring (see Section 7.1.2)
• Analog output monitoring (see Section 7.1.3)
• Combined alarm and analog output monitoring (see Section 7.1.4)
• Local monitoring with a laptop computer (see Section 7.1.5)
• Remote monitoring with host computer (see Section 7.1.6)
7.1.1 Periodic, Visual Monitoring
Among the Hydran M2-X operating methods, the periodic, visual monitoring is the
simplest. If used, the following routine must be an integral part of the on-site, station
inspection:
• Periodic, visual reading (once or twice a day) of the gas and moisture level on
the display of the Hydran M2-Xs.
• On-site verification of alarms messages on the display of the Hydran M2-X’s.
For details on the alarms, see Section 3.1.2.1 and Section 3.2.1.
• Manual logging of above results
Only basic training to the station’s personnel is required to implant this operating
method. When an alarm is detected, the operator must report the alarm and take
the appropriate actions for this type of alarm (follow the regulations and practices of
the company).
If more information on data access is needed, refer to Section 7.2.
Note: With this method, the optional analog output and the alarm contacts are not
connected to a SCADA system.
7.1.1.1 Method Drawbacks
The periodic, visual monitoring method has a long response time following the
detection of an alarm, equal to the period of time between two inspections.
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