Owner's manual

3.3.4 O

measurement

For measurement, lambda probes (l probes) are used.

The electromotive force (in Volt) supplied by the l probes is dependent of the

instantaneous oxygen content and of the temperature. Therefore, Digital 280-1

can display accurate measurement results only, provided that the probe tempera

ture is known to the indicator.

Enter the temperature in °C in parameter tEmP. When using heated l probes, the

probe temperature can be entered directly. When using non-heated l probes, ho

wever, the displayed values can be accurate only for a narrow temperature band.

Unless the probe temperature is known, we recommend using our KS90-1

Oxygen (temperature measurement via a second input).

Configuration:

Adjust O

measurement in function 1:

Func r Fnc.1 3 O2 measurement

Display: The displayed value is always a % value.

As it is mostly necessary to cover a wide measuring range, we recommend adju-

sting a high number of digits behind the decimal point during configuration, whe-

reby loss of high values is prevented due to floating decimal point display

(0,0001 (1 ppm) to 99999 is possible) .

Specify the number of digits behind the decimal point below othr :

othrr dP

0 0 digits behind the decimal point

1 1 digit behind the decimal point

2 2 digits behind the decimal point

3 3 digits behind the decimal point

4 4 digits behind the decimal point

Adjust the sensor type to one of the high-impedance voltage inputs in InP:

Specification in BlueControl Effective measuring range

Inp.1r

S.tYP

41 Special ( 0...100 mV) -2,5...115 mV

42 Special ( 0...1000 mV) -25...1150 mV

43 Special ( -25...90 mV)

44 Special ( -500...500 mV)

These high-impedance inputs are not provided with break monitoring. If necessa

ry, measurement input protection is possible via limit value processing.

Operation

Digital 280-1 Operating level 13