Campbell Scientific CS700 Tipping Bucket Rain Gage and CS700H Heated Rain Gage - Manual (Page 32)

Appendix A. CS700H Operation
A.3 Status LED
The Status LED, within the ambient temperature sensor probe, flashes to
indicate the mode that the CS700H is in (see Table A-2).
TABLE A-2. Status LEDs
Mode Flash Rate Description
Long Flash LED on for 0.5 sec Controller powering up.
Slow Flash 1 flash every 1.5 secs In standby mode waiting for a
heating cycle.
Medium Flash 2 flashes per second Within a Heating Cycle and the
Heating Elements are presently
turned OFF. Waiting for snow to
be present before turning on
heaters.
Fast Flash 8 flashes per second Within a Heating Cycle and the
Heating elements are presently
turned ON.
A.4 Snow Sensor
The snow sensor is actually a capacitive proximity sensor that registers any
material object within a few mm range. The sensor’s power is turned on and
off to conserve power. Table A-3 lists the conditions in which power is
applied.
The state of the snow sensor (snow detected) is read using the Measure (aM!)
and Data (aD0!) commands (4
th value).
The snow sensor must detect snow continuously for 5 seconds
before the detected flag is set to “1”. And conversely, snow must
be absent for 5 seconds continuously before the detected flag is
reset to “0”. This process prevents a premature heating cycle
when in the automatic mode. NOTE
A-4