Teledyne 4250 Installation And Operation Manual page 60

4250 Flow Meter
Section 2 Programming
2-32
Do not disconnect either sonde or flow meter power during a
communications check. The memory in the sonde can be dam-
aged by a power failure during an update.
If the communication check is bad, the following display will
appear:
COMMUNICATIONS CHECK FAILED
PRESS ENTER TO CONTINUE
Note
The flow meter cannot communicate at 600 baud. If your
sonde has been set up for 600 baud, you will get a communi-
cations failure. Consult the YSI 600 Manual for what to do in
this case.
If the communications check is good, the following display will
appear:
COMMUNICATIONS RATE SET AT 2400 BAUD
PRESS ENTER TO CONTINUE
After you press Enter, the flow meter will advance to the fol-
lowing display:
YSI 600 pH UNITS OF MEASURE
• pH • • NOT MEASURED •
• Selection of NOT MEASURED from any of the YSI
menus will prevent you from activating that function
later in the program.
If you wish to make use of the YSI 600 sonde's pH measurement
capability, select pH. If you do not, select NOT MEASURED.
YSI 600 D.O. UNITS OF MEASURE
• MG/L • • NOT MEASURED •
If you wish to make use of the YSI 600 sonde's D.O. measurement
capability, select MG/L. Otherwise, select NOT MEASURED.
YSI 600 CONDUCTIVITY PARAMETER
•YSI SP COND••YSI SALINITY••YSI CONDUCTIVITY•>
For any of the YSI CONDUCTIVITY options, if you press Enter,
the following display will appear:.
TEMPERATURE COEFFICIENT
1.91%
This value is provided because conductivity rises (~2%/ °C) with
temperature. The default setting is 1.91%. This value is the tem-
perature coefficient for pure KCl (potassium chloride) in water.
For other salts this value will be somewhat inaccurate, but it
does provide a close approximation for solutions of many common
salts, such as NaCl (sodium chloride), NH
CAUTION
Cl (ammonium
4