Teledyne 4250 Installation And Operation Manual page 59

TEMPERATURE UNITS
• DEG F • • DEG C • • (NOT MEASURED) •
This step sets up measurement of the temperature of the flow
stream. You must have an Isco Temperature Probe (or approved
equivalent) attached to the flow meter's Parameter Port. The
temperature probe contains a thermistor and needs no further
calibration. Measurement is in degrees Celsius or degrees Fahr-
enheit. If you are not using the temperature probe, you would
select NOT MEASURED for this step.
Note that if you are using either the pH or D. O. probe, temper-
ature must be measured; the NOT MEASURED option will not
even appear.
YSI Sonde – The following series of menus concerns the use of
the YSI 600 Multi-Parameter Sonde. This probe allows you to
measure several different characteristics of a flow stream at the
same time. The YSI 600 Sonde attaches to the Rain Gauge con-
nector on the 4250. This connector must be a special, modified
connector with nine pins.
Note
4250 Flow Meters with 4-pin Rain Gauge connectors cannot
support the YSI 600. It is necessary to return the flow meter to
the factory for modifications if you wish to use a YSI 600
Sonde. In addition to the connector, there are significant inter-
nal modifications to the flow meter's electronics and software.
You can use both the YSI Sonde and a Rain Gauge on flow meters
that support the YSI with a special Y-connect cable. Note that the
YSI 600 Sonde differs from the previously-mentioned pH and
D.O. probes. The YSI 600 can measure pH and D.O. at the same
time, as well as temperature and conductivity. If you are not
using the YSI 600 sonde, select NO in the following display and
the flow meter will advance to the next step. Otherwise, select
YES.
YSI 600 CONNECTED
• YES • • NO •
• If you select NO, you will be unable to activate the YSI
Sonde later in the program.
If no communication has been confirmed, the following display
will appear:
YSI COMMUNICATIONS CHECK
• YES • • NO •
NO is the default. If you select YES, the following display will
appear:
WARNING – DO NOT DISCONNECT POWER
YSI COMMUNICATION CHECK. PLEASE WAIT...
4250 Flow Meter
Section 2 Programming
2-31