Relay Delay; Relay Deadband (Reset) - Siemens Milltronics Pointek ULS200 Quick Start Manual

Relay Delay

Adjust the time delay, in seconds, from when the material reaches the relay level and the relay is
actuated. If the material level withdraws from the setpoint level, the delay is reset to 0.
The set time delay applies to both relays and all functions except `Loss OF Echo'.
Factory setting: 0 seconds.

Relay Deadband (Reset)

Deadband (hysteresis) prevents relay chatter due to material level fluctuations at the set point. These
fluctuations are often waves or turbulence on a fluid's surface caused by agitators in the tank.
Once a relay is tripped, the detection level must move beyond the deadband value before it is reset. The
direction in which the deadband is measured depends on the application of the relay. If the relay is for a
high state then the deadband is measured below the set point. If the relay is for a low state then the
deadband is measured above the set point. Refer to the diagram below.
Deadband 1 is used for Relay 1 and Deadband 2 is used for Relay 2. The deadband value is entered in
the units selected, and applies to both relays and all alarm or control functions except `Loss Of Echo'.
Factory setting: 0.05 m (0.16 ft)
high/high-high alarm
Blanking
Blanking is used to ignore the zone in front of the
transducer where false echoes are at a level that
interfere with the processing of the true echo. It is
measured outward from the sensor face.
The minimum recommended blanking value is 0.25 m
(0.82 ft) but can be increased in order to extend the
blanking.
Factory setting: 0.20 m (0.66 ft)
A5E32268616
on setpoint
deadband
off
low/low-low alarm
Pointek ULS200 – QUICK START MANUAL
deadband
ULS200
off
on setpoint
blanking
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