Hanna Instruments hi 8001 User Manual

52

5.9.4 CALIBRATE SENSORS – S 54

The sensor calibration procedure consists of two stages. Each stage is initiated
by pressing SET key. Both stages are required to complete the calibration proce-
dure. For more information see Section 7.1 SENSOR CALIBRATION PROCE-
DURE . The channel number indexes this panel. This panel displays and allows
the setting of the following parameters:
Channel number
Panel index. The Fertigation Controller is equipped with 8 channels for various
sensor inputs. The channels are configured as follows:

1. pH 1 Sensor (4-20 mA analog input)
2. pH 2 Sensor (4-20 mA analog input)
3. EC 1 Probe (4-20 mA analog input)
4. EC 2 Probe (4-20 mA analog input)
5. EC IN Probe (4-20 mA analog input), 3

rd

 optional EC probe for

monitoring incoming water supply.

8. Solar Radiation sensor (2 volt analog signal)

Now

Real time sensor value for the indexed channel.

Ref

The calibration reference value (entered by the user) for the indicated stage
of calibration, for the indexed channel.

Status indication

Current state of the calibration procedure (current stage/result).

5.9.5 SENSORS CONFIG – S 55

This panel allows the setting of acceptable difference between the probes in the
system. An alarm condition is triggered when the allowable distance is exceeded.
This panel displays and allows the setting of the following parameters: