Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur télécharger pdf (Page 31)

Totalizing

Pulse Output

Option

Total Pulse

RxD

TB1

Isolated Output

Total Pulse

Internal

2.8k…10k

Pullup

Resistor

100 mA

Maximum

Figure 28: Energy version auxiliary totalizer output option

Wiring and configuration of this option is similar to the totalizing pulse output for the flow only variation. This option must

use an external current limiting resistor.

Signal Strength Alarm

The SIG STR alarm will provide an indication that the signal level reported by the transducers has fallen to a point where flow

measurements may not be possible. It can also be used to indicate that the pipe has emptied. Like the rate alarm described

previously, the signal strength alarm requires that two points be entered, establishing an alarm deadband. A valid switch

point exists when the ON value is lower than the OFF value. If a deadband is not established and the signal strength decreases

to approximately the value of the switch point, the output may “chatter”.

Error Alarm Outputs

When a control output is set to ERROR mode, the output will activate when any error occurs in the flow meter that has caused

the meter to stop measuring reliably. See the APPENDIX of this manual for a list of potential error codes.

ALARM OUTPUTS

Page 31 March 2014

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Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur Page 31