6-1
6712SR 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 6712SR sampler in Extended Programming
mode.

6.1 SDI-12 Data

Parameters

The 6712 Sampler 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 pro-
cessing 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
Teledyne 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 Teledyne Isco Ready
and other SDI-12 sondes for use with the 6712.
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.