Operation
OX 4000 H
18
ba75853e04
06/2012
5.2
Measuring
Preparatory activities
Perform the following preparatory activities when you want to measure:
Stability control
[Auto]
During the measuring procedure, the stability control function is auto-
matically activated. The stability control function [Auto] checks the sta-
bility of the measured oxygen signal and the stability of the measured
temperature signal. The stability has a considerable effect on the repro-
ducibility of the measured value.
The status display [Auto] flashes until a stable measured value is avail-
able. As soon as the measured value is stable the status display [Auto]
stops flashing.
For identical measurement conditions, the following applies:
Temperature sensor
The temperature measurement is absolutely essential for a reproduc-
ible oxygen measurement. If a temperature sensor is integrated in the
sensor, it is indicated on the display by [TP].
1
Connect the D.O. sensor to the meter.
2
Calibrate or check the meter with the sensor.
3
Select the measured parameter with
<MODE>
.
Measured parameter
Time interval
Stability in the time
interval
D.O. concentration
10 seconds
Δ
: better than 0.05 mg/l
DO saturation
10 seconds
Δ
: better than 0.6 %
Temperature
10 seconds
Δ
: better than 0.02
°C
