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230 GC data validity
Section 6: Meter operation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
6.5.5 GC data validity
The GC-read gas property data validity is indicated by the AreGasPropertiesInvalidGC data
point. The data is considered invalid if any of the conditions listed in Tab le 6-1 7 is true. These
conditions are indicated by the Daniel MeterLink
Monitor page Field I/O indicator.
6.5.6 GC alarm handling
The following data points are included in the meter’s alarm log (see Section 6.6.4): Are-
GasPropertiesInvalidGC, IsGCAlarmPresent, IsGCCommErr, GCCommStatus, and
IsGCDataErr.
19 GC response message (RTU protocol) incomplete.
20 GC gas property data spans more than one update.
Table 6-17 GC-read gas property invalid conditions
Indication
Data Point
Condition
IsGCAlarmPresent
Invalid or expired GC feature key (see Section 4.1.5).
Option Board Port C is not available (Option Board probably disconnected).
Option Board Port C improperly configured (such as if configured without using the Daniel
MeterLink Field Setup Wizard).
Unrecognized gas component ID.
Specified gas stream (
GCStreamNumber) not found within the specified period (GCDe-
siredStreamTimeout
).
GC reported alarm (GC Alarm1 bits14 and/or 15 set, GC Alarm2 bits 0, 1, 2, and/or 3 set).
IsGCWarningPresent
Not presently used - reserved for future use.
IsGCCommErr Refer to communication error conditions listed in Ta ble 6- 16 .
IsGCDataErr
The total unnormalized gas composition mole percentage is not within [85%, 115%].
An individual gas composition mole percentage is not within [0%, 100%].
The specific gravity is not within [0.2, 0.8].
The heating value is greater than 50 kJ/dm
3
.
Table 6-16 GC Communication status list
GCComm status value Error description