10.4.1 Alarm Parameters Setting; Gas Level - GE Hydran 201 i Instruction Manual

10.4.1 Alarm Parameters Setting

10.4.1.1

Gas Level

The gas level alarm uses the following parameters:
• GasAlr H and GasAlr HH: Gas High and High-High alarm set points.
• GasAlr Delay: The gas alarms delay determines the period of time during which the gas
level must exceed the gas High and High-High alarm set points in order to trigger the
alarm. Accordingly, the gas level must get below the alarm set point for the same amount
of time in order to cancel the alarm.
Before setting these alarm set points, the readings of the Hydran 201i System should be
monitored over a minimum period of two weeks. A simple method to monitor this value is
to consult the Hydran 201Ti's historic data files using its keypad (see Section 4.5.1 on
page 4-12) or a host computer running the Hydran Host software.
Follow these rules:
• Adjust the High set point above the highest reading that was obtained.
• Adjust it low enough to detect the earliest sign of an abnormal increase of gas.
• But set it at a value high enough to minimize unnecessary alarms.
Table 10-4 on page 10-10 contains suggested guidelines for setting the gas level High
alarm condition, according to the maximum reading obtained during the monitoring period.
This Chapter contains examples of how to set the gas alarm
WARNING
CAUTION
parameters of the Hydran 201i System. The values used are
fictitious and do not correspond to any standard. General Electric
Canada does not suggest nor recommend specific alarm set points.
It is solely the responsibility of the user to determine the appropriate
settings.
Part 17997 Rev. 6, March 2011
Gas High and High-High Alarms
10-9