Rice Lake Legend 480-2A, Technical Manual

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70 480 Legend Series
9.12 Analog Output Calibration
The following calibration procedure requires a multimeter to measure voltage or current output from the analog
output module. See Figure 3-15 for analog output menu structure.
The analog output must be calibrated after the indicator itself has been configured (see Section 3.0) and
calibrated (see Section 4.0).
1. Enter configuration mode and go to the
ALGOUT
menu (see Figure 3-15).
• Set source to
GROSS
or
NET
, depending on the weight value to be tracked by the analog output
• Set
OFFSET
to 0% for 0–10V/0-20mA output, 20% for 2-10V/4–20 mA output
• Set
MIN
to lowest weight value to be tracked by the analog output
• Set
MAX
to highest weight value to be tracked by the analog output
Calibrate the minimum weight value for 0 mA, even if a 4-20 mA output will be used. After the calibration is
complete, select the 20% offset.
If set to a 20% offset, the lowest value tracked will be 4 mA. To use a value lower than 4mA, use the 0-20 mA
setting.
2. Connect multimeter to analog output:
• For voltage output, connect voltmeter leads to pins three and four
• For current output, connect ammeter leads to pins one and two
3. Adjust the zero calibration: Scroll to the
TWZERO
parameter. Check voltage or current reading on
multimeter. Press or to select the digit to edit and or to adjust the value of selected (flashing)
digit to set the zero value.
4. Adjust span calibration: Scroll to the
TWSPAN
parameter. Check voltage or current reading on multimeter.
Press or to select the digit to edit and or to adjust the value of selected (flashing) digit to set the
span value.
5. Final zero calibration: Return to the
TWZERO
parameter and verify that the zero calibration has not drifted.
Press or to select the digit to edit and or to adjust the value of selected (flashing) digit to set the
zero value.
6. Return to weigh mode. Analog output function can be verified using test weights.
9.13 Test Mode
In addition to weigh and setup modes, test mode provides a number of diagnostic functions for the 480 , including:
• Display raw A/D count
• Reset configuration parameters to default values
• Number of weighments over threshold
• View the state of the digital inputs
• Control the state of the digital outputs
• Test the analog output
1. Enter configuration mode by removing the setup switch access screw from the back of the enclosure.
2. Insert a non-conductive tool into the access hole to press the configuration switch. Indicator display
changes to show
CONFIG
.
3. Navigate over to
TEST
and then down into the
TEST
menu.
Figure 3-18 shows the Test Menu structure and Table 3-19 summarizes the test menu functions.
Note
Note