6880 Analog Output Installation
Analog Output Calibration
The following calibration procedure requires a multimeter to measure voltage or current output from the analog
output card.
The analog output must be calibrated after the indicator itself has been configured and calibrated.
1. Enter setup mode and go to the ALGOUT menu (Figure 8):
•Set
SOURCE to specify if the scale is tracked by analog output or if analog output is under iRite program
control
•Set
MODE to track either gross or net weight from that scale
•Set
OUTPUT for 0–10 V, 0–20 mA or 4–20 mA output
•Set
ERRACT to specify how the analog output will respond to system error conditions
•Set
MIN to the lowest weight value to be tracked by the analog output
•MIN NEG – set to on to specify the minimum weight (MIN parameter) is a negative value
•Set
MAX to the highest weight value to be tracked by the analog output
•MAX NEG – set to on to specify the maximum weight (MAX parameter) is a negative value
•TWZERO – perform the analog output zero calibration
•TWSPAN – perform the analog output span calibration
number
TWSPAN
OFF
ON
MAXNEGMINNEG
OFF
ON
ERRACT
FULLSC
ZEROSC
HOLD
OUTPUT
0-10V
0-20MA
4-20MA
MODE
GROSS
NET
MAX
10000
number
TWZERO
number
MIN
number
0
SOURCE
SCALE
PROGIN
Figure 8. Analog Output Menu
2. Connect multimeter to connector J1 on the analog output card:
• For voltage output, connect voltmeter leads to pins 3 (-) and 4 (+)
• For current output, connect ammeter leads to pins 1 (-) and 2 (+)
3. Adjust zero calibration: Scroll to the TWZERO parameter. Press to view zero value, then check voltage or
current reading on multimeter. Enter this reading as follows:
• Press or to select the digit
• Press or to increment or decrement the value
• Press
when the value is correct
Example: If multimeter reads 0.15 mV at this point, edit the TWZERO value to read 0.15 and press TARE.
The indicator uses the entry to adjust the output for exactly 0.0 mV. The process may be repeated if
necessary.
4. Adjust span calibration: Scroll to the TWSPAN parameter. Press to view span value, then check voltage or
current reading on multimeter. Enter this reading as follows:
• Press or to select the digit
• Press or to increment or decrement the value
• Press
when the value is correct
5. Verify zero calibration: Return to the TWZERO parameter and verify that the zero calibration has not changed.
If the zero value read on the multimeter is correct, press MENU to cancel the re-calibration. Otherwise, re-
calibrate as in Step 3 above.
• Press or to select the digit
• Press or to increment or decrement the value
• Press
when the value is correct
