YSI Pro2030 - Manual (Page 10)

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The Pro2030 has two compatible sensors for use with a field cable:
Polarographic – This sensor has a black sensor body and is engraved with
the model number 2003. Polarographic will be abbreviated Polaro in the
instrument.
Galvanic – This sensor has a grey sensor body and is engraved with the model
number 2002.
In terms of physical configuration, membrane material and general performance,
YSI Professional Series Galvanic dissolved oxygen sensors are exactly like the
Professional Series Polarographic sensors. The advantage of using Galvanic
sensors is convenience. Galvanic sensors provide an instant-on sensor without
the need for warm-up time but this affects the life of the sensor. Polarographic
sensors last longer and have a longer warranty but require a 5-15 minute warm-
up time before use or calibration.
MeMBrane tyPe
Membrane Type sets the type of membrane used on the dissolved oxygen
sensor; either 1.25 PE (Yellow) or 2.0 PE (blue). Use the up or down arrow keys
to highlight Membrane Type and press enter to open the membrane submenu.
Highlight the membrane type corresponding to the membrane installed on the
sensor and press enter to confirm. The enabled membrane type will have an ‘X’
in the box next to it. Use the down arrow key to highlight the ESC – Exit box
along the bottom of the display and press enter to save changes and to close the
membrane submenu.
The dissolved oxygen sensor is supplied with membranes specific to the sensor
type and are color coded as described in the following tables.
Galvanic Membrane Kits:
Item Color Material Description
5913 Yellow 1.25 mil
polyethylene (PE)
Faster response time and less flow
dependence than traditional Teflon®
membranes.
5914 Blue 2.0 mil
polyethylene (PE)
Less flow dependence than 1.25 mil
membrane but somewhat slower
response.
Polarographic Membrane Kits:
Item Color Material Description
5908 Yellow 1.25 mil
polyethylene (PE)
Faster response time and less flow
dependence than traditional Teflon®
membranes.
5909 Blue 2.0 mil
polyethylene (PE)
Less flow dependence than 1.25 mil
membrane but somewhat slower
response.
Selecting a Dissolved oxygen Membrane:
Membrane
Type
Flow Dependence
After 4 Minutes
Required Sample
Movement
Typical Response
Time (T-95)
5913, 5908
Yellow
25% 6 inches/second 8 seconds
5914, 5909
Blue
18% 3 inches/second 17 seconds
auto staBle
Auto Stable utilizes preset values to indicate when a reading is stable. The preset
values are adjustable in the System Setup menu. The user can input a % change
in readings (0.0 to 1.9) over ‘x’ amount of time in seconds (3-19). There are
two separate Auto Stable controls, one for dissolved oxygen readings (Do Auto
Stable) and one for conductivity readings (Cond. Auto Stable).
Highlight either Do Auto Stable or Cond. Auto Stable, then press enter to open
the submenu.
Use the up or down arrow keys to highlight the % change or seconds (secs) input
field, then press enter to make the highlighted field adjustable. Use the up or
down arrow keys to adjust the selected value, then press enter to confirm changes.
once you have confirmed any changes, highlight the ESC-Exit box along the
bottom of the display and press enter to close the Auto Stable submenu.
To disable Auto Stable, set the % Change input to 0.0.
When Auto Stable is enabled, an AS symbol will display next to the reading
on the Run screen and blink during stabilization. When the dissolved oxygen
and/or conductivity reading stabilizes based on the Auto Stable settings, the
AS symbol will display steadily and the instrument will beep twice if Audio
is turned on.