YSI 30 - Manual (Page 10)

Making Measurements Section 3
YSI, Incorporated Model 30/30M 6
around the probe electrodes. To dislodge any bubbles which might have formed, move or shake the
probe vigorously several times before recording the measurement.
3.2 MEASUREMENT MODES
The Model 30 has three modes as follows:
¾ Conductivity -- A measurement of the conductive material in the liquid sample without regard
to temperature
¾ Specific Conductance -- Also known as temperature compensated conductivity which
automatically adjusts the reading to a calculated value which would have been read if the sample
had been at 25
o
C (or some other reference temperature which you choose). See Section 6,
Advanced Setup.
¾ Salinity -- A calculation done by the instrument electronics, based upon the conductivity and
temperature readings.
Temperature is displayed in conductivity, specific conductance and salinity modes.
The Model 30M has two additional modes:
¾ Recall -- Allows previously stored data to be displayed.
¾ Erase all -- Allows ALL previously stored data to be deleted.
To change between modes, simply press and release the MODE key. The instrument will cycle
through the modes as follows:
Conductivity
with °C
Specific
Conductance with °C
Recall
(Model 30M ONLY)
Erase all
(Model 30M ONLY)
Salinity
with °C
NOTE: When you turn the instrument off, it will “remember” which measurement mode you used
last and will return to that mode the next time it is turned on.
When changing modes, carefully observe the small legends at the far right side of the LCD. If the
instrument is reading Specific Conductance, the large numbers on the display will be followed by
either a
µS or an mS. Additionally, the small portion of the display will show the o
C flashing on and
off .