YSI 30 - Manual (Page 11)

Making Measurements Section 3
YSI, Incorporated Model 30/30M 7
300.1
uS
°C Not flashing = Conductivity
°C Flashing = Specific conductance
24.8 °C
If the instrument is reading Conductivity, 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 NOT flashing.
If the instrument is reading Salinity, the large numbers on the display will be followed by a ppt.
3.3 AUTORANGING & RANGE SEARCHING
The YSI Model 30 is an autoranging instrument. This means that, regardless of the conductivity or
salinity of the solution (within the specifications of the instrument), all you need to do to get the
most accurate reading is to put the probe in the sample. This feature makes the Model 30 as simple
as possible to operate.
When you first place the Model 30 probe into a sample or calibration solution, and again when you
first remove the probe, the instrument will go into a range search mode that may take as long as 5
seconds. During some range searches, the instrument display will flash
rANG to indicate its
movement from one range to another.
rANG
The length of the range search depends on the number of ranges which must be searched in order to
find the correct range for the sample. During the range search, the instrument will appear to freeze
on a given reading for a few seconds then, once the range is located, will pinpoint the exact reading
on the display. The display may also switch to 00.0 for a second or two during a range search before
it selects the proper range.
During normal operation, the ENTER key (UP ARROW key on Model 30M) enables and disables
the autoranging feature of the instrument. We recommend that the instrument always be operated
using the autoranging feature. See Section 6, Advanced Setup if you need to switch to manual
ranging.