15
START
Start function screen
ENABL
Enable start function
DISAB
Disable start function
If this feature is selected, following parameters must be adjusted for proper
operation:
SENS
Pyranometer port designation (radiation monitoring sensor port)
1
Sensor 1
2
Sensor 2
3
Sensor 3
--
Manual input in next step
INS
Radiation threshold in W/m
2
CIRC
Pump runtime in seconds
INT
Maximum interval time in second
FLU
Number of flushes
The following example activates the circulation pump at 200 W/m
2
and runs it for
15 seconds. If
r
T condition is met within the time period, the pump stays on.
INS
20
CIRC 15
larm functions -
User can enable the alarm function of the USDT 2004
in the
ALARM
screen. Status of sensors and circulation pump can be
viewed if alarm function is active.
A ON
Alarm function enable
A OFF
Alarm function disable
The status of the system can be monitored in the
Stat Mode
only if the
corresponding feature is active. The following example shows a system condition
with a circulation problem:
OT OFF
Overheating feature disable
OT OK
No overheating
1 SHORT
Short circuit in sensor 1 wiring
2 SHORT
Short circuit in sensor 2 wiring
1 OPEN
Disconnection in sensor 1 wiring
2 OPEN
Disconnection in sensor 2 wiring
OK
System operates normal
NO CIRC
r
T is more than 108
o
F in last 30 minutes
OK CIRC
Pump is running
A