VSpeak FLOW-meter 1.0, Manual, Page: 21 / 29

FLOW-meter Version: 1.0 www.VSpeak-modell.de
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2.4.3 Alarms
With the Futaba system, alarms are generated in the transmitter according to the alarm
thresholds set there for the individual measured values.
The FLOW-meter for Futaba offers the following options for alarming the tank reserve and fuel
flow monitoring:
2.4.3.1 FUEL Reserve
The FUEL value in % is displayed as a temperature value, so 85 ° C corresponds to 85%.
FUEL display is set as consumed parameter, i.e. the fuel consumed is shown increasing from
0… 100% (° C).
1. Setting value = OFF
If an alarm threshold of e.g. 80 ° C is programmed , then of course the alarm is triggered if
the temperature exceeds 80 ° C - but the alarm does not stop until it is switched off.
That's why:
2. Setting value = 800ml (as an example)
After falling below the tank reserve, the FUEL% (° C) value is transmitted 3 times alternately
for 5 seconds as a negative value, followed by 10 seconds again as a normal positive value.
If you program an alarm <0 in the transmitter, the alarm is triggered only 3 times.
In the example, FUEL Tank Size = 3000ml and FUEL Reserve = 800ml, the consumption
up to 2200ml, i.e. 0 ... .73%, would normally be displayed as a positive value, if exceeded,
3 times alternately as a negative value, e.g. -74%.
2.4.3.2 Flow MIN
The FLOW value in ml/min is displayed as a temperature value, i.e. 125 ° C corresponds to
125 ml/min.
1. Setting value = OFF
The FLOW value is transferred 1:1.
An alarm for a turbine shutdown, e.g. from FLOW min < 40 ml/min, i.e. < 40°C, would
result in a permanent alarm when the transmitter was switched on. That's why:
2. Setting value = 70ml/min (as an example)
The alarm is released after the current flow has been exceeded flow MIN for the first time
(> 70ml/min in the example). If the flow rate falls below the alarm threshold of 70 ml/min
during further operation, it will alternate at intervals of 10 seconds for FLOW -3°C, -2°C
and finally -1°C output.
If you program an alarm < 0°C in the transmitter, the alarm is triggered 3 times,
with alarm < -1°C… .2 alarms and with alarm < -2°C the alarm is triggered only 1 time.
The Alarm Flow MIN is therefore very well suited for signaling a “turbine shutdown”.