䊳
I
nstantaneous value
* ☑: Upon an instantaneous value request (via LCD display
and jog shuttle), the OTT netDL sends a command to the
OTT PLS to start a measurement. Until this measurement is
complete, the LCD display uses to the last measured value
(or the instantaneous value last displayed, whichever is
most recent). On the display this is identified by an "s" to
the right of the channel number (sensor number). After
completing the measurement, the new measured value
appears without additional identification.
☐: Shows the last measured value of the sensor (measured
value of the last query interval) for an instantaneous value
request. On the display, this is identified by an "s" to the
r
ight of the channel number (sensor number), (also refer to
the OTT netDL IP Datalogger Operating Instructions, Chap-
ter 9.1). This setting is helpful for sensors for which a
longer measuring period and shorter query interval is
u
sed.
䊳
Allocation of the additional measured value of the OTT
P
LS which is not recorded in this channel to the virtual ter-
minal (only for the "M!" Measuring Mode; temperature
value).
䡵 In the appropriate "Channel" function blocks, set the required units and num-
ber of decimal places (m: 3; cm: 0; ft: 2; mbar: 1; psi: 3;
°C: 1; °F: 1; Status: 0).
* Only in combination with an OTT netDL
Notes:
䊳
To record the two measured values of an OTT PLS, two channels in the
OTT netDL/OTT DuoSens are therefore required. The first channel contains the -
"SDI-12 Master" or "OTT SDI RS485" as an input signal. The other channel
contains a "Virtual Sensor" function block (V02) as an input signal. Of course,
only one single measured value can be recorded. In this case, no entry is
required in the "Value no./Virtual terminal ID." box.
When the status of the last measurement is to be recorded as well, an addition-
al channel including the "SDI-12 Master" or "OTT SDI RS485" function block
and the "M1!" Measuring Mode are required.
䊳
Further information on the SDI-12 commands and responses used can be found
in Chapter 6, "SDI-12-commands and responses".
䊳
The OTT PLS provides the measurement results for retrieval 2 seconds after the
SDI-12 commando aM!.
V
alue no./
Virtual Terminal ID
27
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