Ampcontrol Pty Ltd
– ABN 28 000 915 542
GG2 DISPLAY USER MANUAL
GG2B023 Version 3
– JUNE/19
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 57 of 82
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6.5 Gas Alarm and Setpoint Configuration
The GG2 Display is capable of comparing the current gas measurement against predefined setpoints.
These setpoints, coupled with a user defined healthy region, determine how setpoint flags may be set
and cleared. This system allows for a large amount of flexibility. The alarm LED indicator (red) on the
GG2 Display is driven by the current health status, when the current gas reading doesn’t lie within the
healthy region the alarm light will flash. Setpoints may be set to negative values to detect changes in the
measurement bias over time. Concepts in this section will be explained using examples.
Figure 65: Example Setpoint Configuration
The example in Figure 65 can be summarised as:
The gas reading is healthy when greater than SP1 (0%) and less than SP1 (1.25%)
Setpoint 3 is 2.5%
Looking at the example, we explain how the setpoint flags are set/cleared:
Setpoint flags are set when the gas reading moves away from the healthy region (positive or
negative gradient) and reaches a setpoint’s value. E.g. the SP3 flag will be set whenever the gas
reading is 2.5% or greater.
Setpoint flags are cleared when the gas reading moves toward the healthy region (positive or
negative gradient) and the setpoint’s value is crossed. E.g. the SP3 flag will be cleared whenever
the gas reading is less than 2.5%.
The corresponding settings in the GG2 Display for the example above are shown in Figure 66.
Figure 66: Configuration - Setpoints
Configuring Setpoints
The setpoints
and healthy region setting can be configured on the “SETPOINTS” screen (refer to Section
6.1.2). Please refer to Section 6.1.2.2 for further information about changing options.
