Hach IO9000 Instructions D'utilisation page 17

5.1.3 Configure the analog inputs
1. Push MENU.
2. Select Hardware Setup>AUX and I/O Port>Analog Inputs>[Select Analog Input]>Setup Wizard.
3. Use the DOWN arrow to select Enable, then push Next.
4. Obey the prompts on the screen. Refer to
Note: To set the analog input settings and calibration to the factory defaults, select Restore Defaults.
Setting Description
Select Source Type Selects the measurement that shows on the selected analog input. Options: Level, Velocity,
Flow, Temp, pH
Select Loop Scale Sets the analog range for the analog input. Options: 0–20 mA or 4–20 mA
5.1.4 Configure the analog outputs
1. Push MENU.
2. Select Hardware Setup>AUX and I/O Port>Analog Outputs>[Select Analog Output]>Setup
Wizard.
3. Use the DOWN arrow to select Enable, then push Next.
4. Obey the prompts on the screen. Refer to
Note: To set the analog output settings and calibration to the factory defaults, select Restore Defaults.
Setting Description
Select Source Selects the measurement that shows on the selected analog output. Only the
measurements that are recorded in the data log can be selected.
Select Loop Scale Sets the analog range for the analog output. Options: 0–20 mA or 4–20 mA
Select Loop Sets the loop power source to be internal or external.
Power Internal—Selects the sampler as the power source of the analog output. External—Selects
another device as the power source of the analog output. When external is selected, the
sampler acts as a variable current limit device.
Set Transfer Value Sets the analog loop value that is supplied on the analog output when an input
measurement error occurs. Options: 3.0 to 25.0 mA
An input measurement errors occurs when:
• A sensor malfunction occurs.
• The input measurement value from the sensor is not valid.
• The sensor is not detected by the controller.
• The sensor has been removed by the user.
Section 6 Calibration
6.1 Calibrate the analog signals
If the I/O module is connected to a sampler, calibrate the analog inputs to make sure that the analog
input signals (4 mA and 20 mA) that are supplied by external instruments are correctly measured by
the sampler. Calibrate the analog outputs to make sure that the analog outputs (4 mA and 20 mA)
that are supplied by the sampler are the correct values.
Table 4 for descriptions of the settings.
Table 4 Analog input settings
Table 5 for descriptions of the settings.
Table 5 Analog output settings
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