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 -042/,,lRMWAREORLATER
s 3$)!DAPTERFORPROPERPOWERMANAGEMENT
s 3$)DATARECORDERCUSTOMERSUPPLIED
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 7()4%SERIALDATALINE
s ",!#+GROUNDLINE
s 2%$VOLTSUPPLYLINE
s '2%%.SHIELD
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.