Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur télécharger pdf (Page 29)

5.3.5 Submenu “K-Factors Settings”

Conversion factors relative to Nitrogen are convenient to use when the flow

meter/controller mated to the TIO is calibrated for Nitrogen and another gas is

required to be measured/controlled.

Conversion factors relative to Nitrogen for up to 22 common gases are stored in

the TIO (see APPENDIX II). In addition, provision is made for a user-defined con-

version factor. Conversion factors may be applied to all units of measure (except

%FS unit) via LCD/Keypad or digital communication interface.

The following three parameters are available for this function:

a) K-Factor Mode: Disable, Internal Index, user-defined (default Disabled)

b) Internal K Factor Index: 1 – 22 (from internal K-Factor table, see APPENDIX II)

c) User-defined K-Factor: 0.001 – 999.9 (default value is 1.000).

5.3.6 Submenu “Alarm Settings”

TIO provides the user with a flexible Alarm/warning system that monitors the Fluid

Flow for conditions that fall outside configurable limits as well as visual feedback

for the user via the LCD or via an optically-isolated output. The Flow Alarm has

several attributes which may be configured by the user via LCD/Keypad or digital

communication interface. These attributes control the conditions which cause the

Alarm to occur and to specify actions to be taken when the flow rate is outside the

specified conditions.

Depending on the TIO function configuration (flow meter or controller) there are

two Alarm algorithms. If the TIO is configured as a flow meter, Flow Alarm condi-

tions become true when the current flow reading is equal to or Higher/Lower than

corresponding values of High and Low Flow Alarm levels. If TIO is configured as

flow controller, Flow Alarm conditions become true when difference between Set

Point value and current flow reading is equal or Higher/Lower than corresponding

values of High and Low Flow Alarm levels.

Alarm action can be assigned with preset Delay Interval (0-3600 seconds) to acti-

vate the optically-isolated output (separate for High and Low Alarm). Latch Mode

control feature allows each optical output to be latched on or follow the corre-

sponding Alarm status.

Following settings are available for Flow Alarm (see Figure 5.7):

Note: The conversion factors will not be applied for the % F.S.

engineering unit.

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Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur Page 29