Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 50)

IM 12J05D02-01E
5-14 Parameter setting
5-3. Notes for guidance in the use of service coded settings
5-3-1. Parameter specific functions
Code 01 *S.TYPE Select 0 for DO30 sensor or other galvanic sensor. Select 1 for SM31, other
polarographic sensor and optical dissolved oxygen sensor.
*I.CELL After selecting sensortype you need to select the nominal cell current. With a
galvanic sensor 3 choices are offered.
Select 0 for DO30 thick (50 µm) membrane with a default of 3.75 µA.
Select 1 for DO30 thin (25 µm) membrane with a default of 7.5 µA.
Select 9 for user definable. This can be set to suit any galvanic sensor.
With polarographic sensor 2 choices are offered.
Select 0 for SM31 sensor with a nominal cell current of 50 nA.
Select 9 for other polarographic sensor, with the nominal cell current to be user
defined.
Select 9 for the DO70G sensor and input the nominal cell current of 60 nA.
General Note: Dissolved oxygen sensors fall into two categories – galvanic and
polarographic. Yokogawa offer both types:
Settings for Yokogawa Sensors
DO30 DO30 SM31. DO70G
Membrane Thick Thin Sterilizable Fluorescence
*S.TYPE 0 0 1 1
* I.CELL 0 1 0 9
Code 02 * CHECK This code is used to set up appropriate diagnostics. In most cases a zero
calibration is not used, the default check, therefore, set to “off”. When zero
check enabled, the maximum permissible zero offset should be set as a signal
current.
When slope check enabled, the maximum as minimum calibrated slope values
should be set as % of the nominal value.
For the galvanic sensors, a membrane check can be enabled. This is an
impedance test to ensure that the membrane is intact.
The membrane check is not available for optical and polarographic sensors, so
the membrane check cannot be enabled or disabled.
Code 04 *SAL.TY Set 0 (salinity compensation disabled) when measuring water not including
salinity components. Set 1 (salinity compensation enabled) when manually
calibrated to salinity compensation. This is intended for accurately displaying
saturated % concentration when measuring sample water. Set 1 (salinity
compensation enabled) and then enter NaCl concentration using *[CL-]. For
this concentration, enter salinity concentrations in actual sample water used to
figure out salinity compensation values.
NOTE:
The instrument will not perform salinity compensation simply by setting the
salinity compensation to “1” (enabled) in Code 04, but requires the NaCl
concentration. For measurement in consideration of the salinity of a sample,
first, manually calibrate with values corrected for salinity and enter the NaCl
concentration in Code 04. (See Section 6.4, “Calibration method using manual
calibration method”)