In-Situ TROLL 9500 Operators Manual - Manual (Page 135)

130
Multi-Parameter
Water Quality TROLL ®
TROLL 9500 Operator’s Manual 0095110 rev. 007 01/09
Cable length Power supply
feet meters requirement
170 52 9.6 V
180 55 9.8 V
190 58 9.9 V
200 61 10.1 V
210 64 10.3 V
220 67 10.4 V
230 70 10.6 V
240 73 10.8 V
250 76 10.9 V
260 79 11.1 V
270 82 11.3 V
280 85 11.4 V
290 88 11.6 V
300 91 11.8 V
Table 19-1. Cable length & power supply requirements
19 SDI-12 OPERATION
SDI-12 is a serial digital interface that operates at 1200 baud. In-Situ’s
SDI-12 Adapter enables processing of the MP TROLL 9500’s sensor
measurements by a standard SDI-12 data recorder.
SDI-12 REQUIREMENTS
s
WIRING
Connect the stripped and tinned wires from the SDI-12
Adapter to the terminal block of an SDI-12 data recorder (or
to an SDI-12 network) as follows.
s
The data recorder or an external power supply may provide power
(9.6 - 16 V) to the 12V line. The shield should be terminated (ground-
ed) at the data recorder.
Minimum voltage supplied per the SDI-12 specification (9.6V) is
sufficient to power a TROLL 9500 on 170 ft (52 m) of RuggedCable.
Cables as long as 300 ft (91 m) may be used, depending on power
supplied. Before using cables longer than 170 ft (52 m) we recom-
mend that you measure the voltage at the Adapter. The table lists
power requirements for specific submersible cable lengths.
CONNECTIONS
Attach the Twist-Lock Connector on the MP TROLL’s RuggedCable to
the matching connector on the SDI-12 Adapter.
The Adapter is weather-resistant but not completely waterproof. It is
not designed to be exposed to the elements. Provide a weather-resis-
tant enclosure for optimum operation.
SDI-12 SUPPORT
The MP TROLL 9500 supports the SDI-12 Version 1.3 commands.
Data loggers that support SDI-12 Version 1.3 can usually send the
Version 1.3 commands to an SDI-12 “sensor” like the MP TROLL
automatically. These commands are listed later in this section. Ad-
ditional information may be found in an SDI-12 reference, such as that
listed at the end of this section. Or consult your SDI-12 data logger
documentation for more specific information.
Insure SDI-12 is enabled (factory default) on the 9500. In
Win-Situ 4 or Pocket-Situ 4, select the TROLL, click Edit...
select SDI-12 Mode Preferences.
Calibration of the water-quality sensors will need to be done
through Win-Situ 4 or Pocket-Situ 4 as SDI-12 protocols do
not support calibration.