3-1. parameter specific functions, 3-2. temperature functions, 3-3. calibration functions – Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer User Manual
Page 46
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