YOKOGAWA EXA DO402G, Инструкция по эксплуатации

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5-14 Parameter setting
IM 12J6B3-E-H
5-3. Notes for guidance in the use of service coded settings
5-3-1. Parameter specific functions
Code 1 *S. TYPE Select 0 for DO30 sensor or other galvanic sensor. Select 1 for SM31 and other
polarographic 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.
General Note: Dissolved oxygen sensors fall into two categories – galvanic and
polarographic. Yokogawa offer both types:
Settings for Yokogawa Sensors
DO30 DO30 SM31.
Membrane Thick Thin Sterilizable
*S type 0 0 1
* I Cell 0 1 0
Code 2 * 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.
Code 4 *SAL.TY Enable and set level for salinity compensation. This function is particularly useful
when measuring in estuarine or brackish waters.