YOKOGAWA EXA DO402G, Руководство пользователя

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<5. Parameter setting>
5-14
IM 12J05D02-01E
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 sensor type 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”)
9th Edition: Aug. 05, 2015-00