Hach LANGE sc200 4-20 Manuel D'utilisation page 7

Operation
Configure a 4-20 mA input module
An analog module must be installed in the controller.
1. Determine what output the connected device is using (0-20 mA or
4-20 mA). This information will be used to set the scale.
2. Determine what the 20 mA value is equal to (e.g, 100 psi).
3. Determine what the low end (0 or 4 mA) value is equal to (e.g.,
10 psi). This information will be used to set the display range.
4. From the Settings Menu, select Sensor Setup.
5. Select Configure.
6. Update the options.
a. Highlight an option and push ENTER.
b. Make a selection or update the entries.
c. Push ENTER to save the changes.
Option
Edit name
Edit units
Edit parameter
Display range
For the 0-20 mA scale:
• Set the 20 mA value
• Set the 0 mA value
For the 4-20 mA scale:
• Set the 20 mA value
• Set the 4 mA value
Description
Edits the module name
Edits the measurement units
Edits the parameter name
Sets the values used for the selected
scale (0-20 mA or 4-20 mA)
Option
Signal average
Set resolution—
X.XXX, XX.XX, XXX.X, XXXX
Select scale—
4-20 mA or 0-20 mA
Data log interval—5 sec, 30 sec,
1 min, 2 min, 5 min, 10 min,
15 min, 30 min, 60 min
Reset defaults—Push ENTER to
reset configuration settings or
push the BACK key to cancel.
Calibration
Notes
• The Reset Default Cal option sets calibration settings to their default
values.
• To stop a calibration, push the BACK key and then the ENTER key.
Perform a 1 point calibration
1. From the Settings Menu, select Sensor Setup.
2. Select Calibrate.
3. Select Cal Options.
a. Select the Current option to perform the calibration using a
current (mA) value, or
b. Select the Input option to perform the calibration using a
measurement value, such as psi.
c. Push the ENTER key.
Description
Sets how often signals are averaged.
Higher values produce a smoother
signal but increase the time it takes
for a signal to respond to a change in
the process value.
Sets the number of decimal places
used in the display.
Sets scale used for the 4-20 mA input
Sets how often data is logged to the
internal controller memory.
Resets configuration settings to the
default values.
English 7