Hach POLYMETRON 9240 Basic User Manual page 18

mA outputs
1. Select the mA OUTPUTS option to set up the parameters for all the analog outputs.
2. From the list available, select the mA output you wish to set.
Output parameters
1. Analog output parameters:
Choose the attribute that triggers the analog output.
Attribute
Note: The attribute variable cannot be applied to Output 0, which is reserved for the continuous live output signal.
Type Choose either a 0-20 mA or 4-20 mA analog output
Mode Select the mode. This parameter is only selectable if the attribute is set to a measurement channel
Low The value corresponding to the low end of the scale
Middle The value corresponding to the mid-point of the scale (only available in dual mode)
High The value corresponding to the high end of the scale
Event indication
1. Select the EVENT INDICATION option in the mA Outputs menu to display the options available
for event setting.
2. Select the option for which you want to set an event.
3. Define the attribute for the event. This is one of the outputs or None.
4. The MODE can be either a Preset val or Frozen.
5. If a preset value is chosen, you will be required to enter the value of the analog output that will be
forced, when that event occurs.
Test
This option allows you to enter a value into the mA field. Press the Enter function key to force this
value on all the analog outputs. The value can then be verified with the use of a multimeter
connected to the analyzer.
RS485 (or PROFIBUS)
Note: If the PROFIBUS option has been installed, then the menu option will show PROFIBUS rather than RS485,
and the PROFIBUS parameters will need to be installed.
1. Select the RS485 option to set up the parameters for the communications protocol.
2. Press the Enter function key to accept each data element.
3. On completion, press the Esc function key to return to the user setup screen.
18 English