Lighthouse REMOTE-2 PN Series Operating Manual
5-2 248083310-1 Rev 3
commands are received or an invalid command is received, the
instrument will recall its last stored parameters (or default settings)
and continue to use them.
Startup Example:
Lighthouse Remote Instrument (4-20mA):
Sample Time = 60 secs
Range1= 10000.
Range2= 1000.
Alarm Threshold = 750 counts
Suppress Alarms = 2
Service High = 3500 mV
Service Low = 125 mV
COUNT
The instrument uses setup parameters to run, collect data, and output
count and alarm data. Zero particle counts will be represented by 4mA,
and counts equal to the upper range will be 20mA. The current output
will have a direct linear relationship to the range.
• Iout= 16mA(counts/ range) + 4mA
• Vout= Iout(R-load)
• If a Service Alert occurs, both channels are set to 2mA.
TIMER
Keeps track of time relative to sample seconds, and outputs sample data
every SampleSecs.
OUTPUT
• Outputs counts on CH1 and CH2 lines in 4-20 mA output currents.
• When counts are greater than the alarm threshold, after a "suppress"
# of consecutive alarm conditions, the Alarm Relay is turned on.
ALARM
If the CH1 or CH2 count exceeds the programmed ALARM threshold
then:
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