3-1. parameter specific functions, 3-2. temperature functions, 3-3. calibration functions – Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer User Manual

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IM 12J05C01-01E

Parameter Setting 5-6

5-3. Notes for guidance in the use of service coded settings

Don't set or input service code numbers other than the code numbers defined in this manual. Setting an

undefined service code may make the transmitter malfunction.

When an undefined service code is input by some accident, push the MODE key and escape from the serv-

ice level.

5-3-1. Parameter specific functions

Code 1

*S.TYPE

Select 0 for DO30G sensor or any other galvanic sensor. Select 1 for Oxyferm,

Oxygold and other polarographic sensors.

*V.POL

Set the polarization voltage of the connected sensor (only for polarographic sensors).

*SENS

Set the sensitivity of the connected sensor.

Code 4

*SAL.TY

Enable or disable compensation. This function is particularly useful when

measuring in estuarine or brackish waters.

*[Cl-]

Set level for salinity compensation.

5-3-2. Temperature functions

Code 10

*T.SENS

Select temperature sensor to suit the measuring probe. The default selection is

the 22k NTC sensor. Refer to the instructions delivered with the DO sensor to

check which temperature sensor is used.

Code 11

*T.UNIT

Select °C or °F for temperature display.

Code 12

*T.ADJ

Adjust offset in temperature measurement when the sensor is at a stable known

value.

Code 13

*T.MAN

Enable and set manual temperature compensation.

5-3-3. Calibration functions

Code 20

*∆T.SEC

Set stability parameters for calibration. A greater time, and/or a smaller step gives

*∆Z.PPM

greater stability before a calibration can be accepted. Use caution, however, to avoid

*∆Z.PPB

very long calibration times.

*∆Z.SAT

*∆S.PPM

Code 21

*Z.CAL

Normally not necessary, zero calibration can be enabled when required.

*Z.LIM

Zero check limit.

Code 22

*ZERO

Calibration values can be entered from independent (laboratory) data.

*SENS

The sensitivity is the increase of the cell current per ppm and is specified in nA/

ppm at 25˚C (77˚F).

Sensor

nominal sensitivity (nA/ppm at 25˚C)

DO30(G) 450

OXYFERM 7.5

OXYGOLD 35