OTT Pluvio 2 S - Measured Value Output via Pulse Output

䊳
Bucket RT
This value outputs the currently measured, unfiltered bucket content. It corresponds
to the measured weight raw data and is subjected to higher uncertainty with
regard to temperature and wind impact. The measured value is particularly suited
f
or quick reference measurements of the weighing mechanism and for determining
the current bucket level. Using this measured value for separately calculating the
amount of precipitation in an external datalogger is not reasonable!
Output delay: real-time output (RT)
Units: mm · inch
Resolution: 0.001 mm (1mm =
^
20 g)
R
ecommended sampling interval: 1 minute (with simultaneous sampling of the
precipitation intensity)
Recommended storing interval: any time between 1 minute and 24 hours
(possibly averaging over 10 minutes)
䊳
Bucket NRT
This value outputs the currently measured, filtered bucket content.
It corresponds to the filtered weight value and is subjected to uncertainty with
regard to temperature impact. The value is particularly suited for determining
the content of the bucket and for calculating the evaporation behaviour. Using
this measured value for separately calculating the amount of precipitation in an
external datalogger is not reasonable!
Output delay: non-real-time output (NRT)
Units: mm · inch
Resolution: 0.001mm (1mm =
^
20 g)
Recommended sampling interval: 1 minute (with simultaneous sampling of the
precipitation intensity)
Recommended storing interval: any time between 1 minute and 24 hours
䊳
Temperature of load cell
Internal temperature of the load cell for compensating for the temperature change.
This value is only relevant to internal purposes and generally differs from the current
ambient temperature by several °C.
Units : °C · °F
Recommended sampling interval: 1 minute (with simultaneous sampling of the
precipitation intensity)
Recommended storing interval: only as required (any time between 1 minute
and 24 hours)
3.2 Measured value output at pulse output
The OTT Pluvio
2
S uses two pulse outputs to output the amount of precipitation
RT/NRT (output #1) as well as the status information (output #2) in parallel.
Parallel operation of serial interface and pulse output allows two dataloggers
or one datalogger and one PLC to be connected simultaneously.
Electrical characteristics of the pulse and status outputs
Pulse ON contact closed
Pulse/pause ratio: 1:1
for 5 Hz =
^
100/100 ms
for 2 Hz =
^
250/250 ms
Contact design: non-bouncing, polarity independent, isolated
Current capacity, I
max
: ≤ 100 mA (short-circuit proof;
load cut-off at 200 mA)
Voltage, U
max
: ≤ 28 V
DC
9