3
Keyboard
SET
= Installs the meter according your application.
¿
/
À
= Button for entering a value or for selecting a function.
CAL
= Starts or proceeds a calibration or a function.
Error codes
[Or. EC]
= Conductivity-overrange (e.g. electrode cable short
circuited).
[Or. °C]
= Overrange °C (measured degrees out of range).
[not.CAL]
= Calibration procedure interrupted (the previous calibration
remains valid!).
[Err.cc]
= Cell constant not within 70..130 % of the nominal value.
[Err.CAL]
= Calibration error (check electrodes and standard
solutions).
[Err.COd]
= Invalid code (enter the proper sequence of keys!).
[Err.COM]
= RS232 communication error.
[Err.Prb]
= Temperature probe (Pt1000 or Pt100) is not connected.
[not drY]
= Cell too wert for an automatic capacitance compensation.
[EnGinEEr]
= Code access not possible (call a service engineer to reset
the controller!).
[Err.MEM]
= Fatal memory error (all factory settings are cleared. Have
your instrument serviced!).
[ILLEGAL]
= An unauthorised person has failed to repair the unit.
Warranty is elapsed from now on!
The display alternates automatically (±4 s interval) between the
selected measuring ranges by pressing
¿
and
À
together until [ALt] is
shown.
Inputs
Before starting a measurement, the necessary electrodes should be
connected to the proper inputs. A separate automatic temperature
compensation is provided for each channel but a common Pt1000 (or
Pt100) thermocompensator for both channels can also be used.
Before the exact location of the electrodes is finalised, it is worthwhile to
carry out a measuring profile of the process stream to ensure that the
required homogeneity is being achieved. As a general rule the electrodes
should protrude into the process stream by one-third of the pipe width and
be positioned so as to avoid gas pockets or sediments. Generally the
measuring electrodes are inserted into the flow with the sample pick-up
facing downstream in order to reduce the risk of blockage by suspended
material. All sensors are usually positioned vertically at a suitable point
downstream of the dosing point, where the measurements are stable and
reliable. The response of the dosing system will be affected by the time
required to disperse the reagents and their arrival at the measuring point.
Sample point
Connections
Electrodes:
EC1
conductivity cell terminal (+) and (-) of (CHAN.1).
EC2
conductivity cell terminal (+) and (-) of (CHAN.2).
°C1
Pt1000 electrode to terminals (°C1).
°C2
Pt1000 electrode to terminals (°C2).
