OTT Pluvio 2 S - Page 14

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Mode #3 The heater is controlled based on the National Weather Service
(NWS) Standard. The heater control is active from a preset time
(starting time) on and continuously keeps the orifice rim tempera-
ture at the predetermined setpoint. The On-time may be adjusted
as well (1 … 1440 minutes).
Outside this On-time, the heater self-test is performed based on a
selectable interval (1 h … 7 d).
Please note: This mode requires the OTT Pluvio
2
S system time to be set cor-
rectly. In case a power failure lasts longer than 10 minutes, the OTT Pluvio
2
S
s
ystem time will be lost. This will result in incorrect heater control system opera-
tion!
䊳
Mode #4 Heater control system is operated based on precipitation events.
Once precipitation has started, the heater control will be active
for a preset after-run time (1 ... 1440 minutes) and continuously
keep the orifice rim temperature at the predetermined setpoint.
Outside this after-run time, the heater self-test is performed based
on a selectable interval (1 h … 7 d).
A
mbient temperature
T
arget temperature
Temporarily disabled (+064)
H
eater control system status
Orifice rim temperature
t
Starting time*
* Factory setting: 14:00:00 o'clock
On-time
t
Fig. 5: Diagram of orifice
rim heater Mode #3.
Ambient temperature
Target temperature
Temporarily disabled (+064)
Heater control system status
Orifice rim temperature
Precipitation event
t
t
t
* Factory setting: 20 minutes
After-run time*
Fig. 6: Diagram of orifice
rim heater Mode #4.
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