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4.7 Start-up delay [dSt]
If the start-up delay is active ([dSt] > [0]), note: as soon as the volumetric flow
quantity exceeds 0�5 % of the final value of the measuring range (VMR), the fol-
lowing processes are carried out:
• The start-up delay is activated�
• Output 1 switches as programmed: ON for NO function, OFF for NC function�
• Output 2 switches when the flow is evaluated ([SEL2] = [FLOW]) as pro-
grammed: ON for NO function, OFF for NC function�
• [dSt] only has an effect on the switching signals for volumetric flow monitoring�
After the activation of the start-up delay there are 3 options:
• The volumetric flow quantity increases quickly and reaches the switch point /
goodrangewithindSt→outputsremainactive.
• The volumetric flow quantity increases slowly and does not reach the switch
point/goodrangewithindSt→outputsarereset.
• Thevolumetricflowquantityfallsbelow0.5%withindSt→outputsareimme-
diately reset; dSt is stopped�
Example: dSt for hysteresis function
1
VolumetricflowquantityQreaches0.5%ofVMR→dStstarts,outputbecomesactive.
2 dStelapsed,QreachedSP→outputremainsactive.
3 QbelowSP,butaboverP→outputremainsactive.
4 QbelowrP→outputisreset.
5 Qreachesagain0.5%ofVMR→dStstarts,outputbecomesactive.
6 dStelapsed,QhasnotreachedSP→outputisreset.
7 QreachesSP→outputbecomesactive.
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