Model 2000 Flow Computer Instruction Manual
2.0 GENERAL DESCRIPTION
Model 2000 issue 21 Page No
48
27) Modbus communication time out alarm.
28) Gas component xxxxx is above the max value for that component.
29) Gas component xxxxx is below the min value for that component.
NOTE xxxxx is up to 5 characters representing any of the gas components.
2.6.1.2. TURBINE ACCOUNTABLE ALARMS
If the Model 2000 is set-up for use with a Turbine Meter then the following alarm types can also occur:-
1) An hf turbine meter alarm (blade failure) has occurred turbN hf.
2.6.1.3. ULTRASONIC ACCOUNTABLE ALARMS
If the Model 2000 is set-up for use with an Ultrasonic Meter then the following alarm types can also occur:-
1) Wrong number of acoustic paths specified usN paths.
2) Meter security alarm bit set usN secur.
3) Reduced accuracy alarm usN level1.
4) Reduced accuracy alarm usNlevel2.
5) If an invalid floating point number has been received from the meter.
6) No valid communications from the meter for last 5 seconds usN comms.
2.6.1.4. DIFFERENTIAL PRESSURE ACCOUNTABLE ALARMS
If the Model 2000 is set-up for use with Differential pressure measurement across an orifice plate then the following alarm
types can also occur, All differential pressure alarms will be indicated without sign for the positive or single direction and
prefixed by a –ve sign for alarms on transmitters when the flow is in a negative or reverse direction:-
1) High range dp sensor 1 is above the value of dphi.N max.
2) High range dp sensor 1 is below the value of dphi.N min.
3) There is no value for high range dp sensor 1 dph1.N val.
4) A comms failure has occurred between the Model 2000 and high range dp sensor 1 dph1.N hrt.
5) High range dp sensor 1 is in a sensor generated alarm condition dph1.N hst.
6) The selected high range dp units do not match the units indicated by high range dp sensor 1 dph1.N unt.
7) High range dp sensor 1 value is outside the deviation limit dph1.N dev.
8) High range dp sensor 1 value is outside the average deviation limit dph1.N adev.
9) Low range dp sensor 1 is above the value of dplo.N max.
10) Low range dp sensor 1 is below the value of dplo.N min.
11) There is no value for low range dp sensor 1 dpl1.N val.
12) A comms failure has occurred between the Model 2000 and low range dp sensor 1 dpl1.N hrt.
13) Low range dp sensor 1 is in a sensor generated alarm condition dpl1.N hst.
14) The selected low range dp units do not match the units indicated by low range dp sensor 1
dpl1.N unt.
15) The low range dp sensor 1 value is outside the deviation limit dpl1.N dev.
16) Low range dp sensor 1 value is outside the average deviation limit dpl1.N adev.
NOTE In all cases above 1) to 16) the numeric character could be 1, 2 or 3 depending upon the number of
selected multiple transmitters.
17) The high range serial check dp is above the value of dp hi N max.
18) The high range serial check dp is below the values of dp hi N min.
19) The low range serial check dp is above the value of dp lo N max.
20) The low range serial check dp is below the value of dp lo N min.
NOTE In all cases above the character N will refer to the stream number 1, 2 or 3.
2.6.1.5. DENSITY ACCOUNTABLE ALARMS
If the Model 2000 is set-up for use with a periodic measured Density or Relative Density input then the following alarm types
can also occur:-
1) Density frequency High alarm (above 5000Hz) densN f hi.
2) Density frequency Low alarm (below 500Hz) densN f lo.
3) Rel. dens. frequency High alarm (above 5000Hz) rdN f hi.
4) Rel. dens. frequency Low alarm (below 500Hz) rdN f lo.
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