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6-1
6712FR Refrigerated Sampler
Section 6 SDI-12 Sondes
In order to provide you with the flexibility to use the water
parameter sensors that best meet your needs, Teledyne Isco has
implemented support for SDI-12 protocol. Support of this
standard allows you to use SDI-12 compatible devices in con-
junction with your 6712FR sampler in Extended Programming
mode.
6.1 SDI-12 Data
Parameters
The 6712 can accept up to 16 parameters from up to ten sensors
with SDI-12 addresses from 0 - 9 (refer to chart in Figure 6-1).
This data can be used in different ways. Data can be logged at
user selectable time intervals for later download and processing
by Teledyne Isco’s Flowlink™ program. You can set up sampling
programs that will be enabled to run only if conditions based on
parameters monitored by the connected SDI-12 devices are met.
The sampler can also be programmed to take samples each time
certain parameter limits are exceeded.
The data parameters used by the sensing device (sonde) and
recording device (sampler) must match. Otherwise, the
equipment could record the data values for one parameter as
another’s, such as reporting a pH value as being temperature.
Certain vendors’ sondes (such as Hydrolab and YSI) have
enhanced commands that facilitate “plug and play” setup. These
Isco Ready sondes can tell the 6712 what values they have, their
order, and units of measure.
Other SDI-12 compatible sondes can be used, but require manual
setup to identify proper data types for each data value reported.
This section shows you how to set up both Isco Ready and other
SDI-12 sondes for use with the 6712FR.
WARNING
SDI-12 Sondes have not been approved for use in
hazardous locations as defined by the National Electrical
Code.
CAUTION
Before you install any sonde, you must take the proper safety
precautions. Refer to Appendix C in the back of this manual.
Additional safety considerations may be required. Check appli-
cable guidelines, codes, and regulations of federal, state, city,
and county agencies.