Hach sc200 Manuel De L'utilisateur page 7

Operation
Configure a 4-20 mA input module
An analog module must be installed in the controller.
1. Determine what output the 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
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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
ENTER
Reset defaults—Push
reset configuration settings or push
BACK
the key to cancel.
Calibration
Notes
• Output Mode
• Set the output mode to Active to use the current measured value in
a calibration.
• Set the output mode to Hold to use the last measured value in a
calibration.
• Set the output mode to Transfer to transfer a specified value to the
4-20 mA input for use in a calibration.
• Cal Options
• Select Current to perform a calibration using current values (mA).
• Select Input to perform a calibration using measurement values (such
as psi).
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
to
default values.
English 7