wtw Oxi 3315, Operating Manual

Page: 48 / 60

What to do if... Oxi 3315
48
ba75944e02 03/2012
10 What to do if...
10.1 Dissolved oxygen
Error message
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
10.2 General information
Sensor symbol
flashes
Display
Meter does not react
to keystroke
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
– Measured value outside the
measuring range
– Use a suitable IDS D.O. sensor
Cause Remedy
– Sensor contaminated – Clean the sensor
– Measured temperature value
outside the operating conditions
(display of OFL/UFL instead of a
temperature value)
– Keep to the temperature range for
the test sample
– Defective probe – Replace probe
Cause Remedy
– Calibration interval expired – Recalibrate the measuring system
Cause Remedy
– batteries almost empty – Replace the batteries (see section
9.1 M
AINTENANCE
, page 46)
Cause Remedy
– Operating condition undefined
or EMC load unallowed
– Processor reset:
Press the
<ENTER>
and
<On/Off>
key simultaneously