Anderson LA Series Інструкція з експлуатації - Сторінка 11
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2.6 CALIBRATION - UTILIZING ON-BOARD SETUP
2.6 CALIBRATION - UTILIZING ON-BOARD SETUP
2.6 CALIBRATION - UTILIZING ON-BOARD SETUP
2.6 CALIBRATION - UTILIZING ON-BOARD SETUP
2.6 CALIBRATION - UTILIZING ON-BOARD SETUP
LD/LA transmitters utilize on-board "Setup" circuitry to perform maintenance and calibration.
With these tools, in addition to a digital multimeter, it is possible to perform a field calibra-
tion / re-calibration of the output range.
Note:
• Use caution if altering factory calibration – no record will exist at Anderson
pertaining to changes
• Calibration MUST remain within range parameters of unit – be sure to refer to
tables provided
• Loop power MUST be supplied to sensor
Tools Required: Digital Multimeter
NOTE:
When re-calibrating a unit, you must remain within unit FULL OPERATING
RANGE (0- 72" w.c.).
1.
Determine Desired Calibration, in Inches of Water Column ("WC)
Example:
Height Above Sensor In Inches (32") x
Specific Gravity of Product (1.032) = 33.0"WC
2.
Determine Proportional Cal Value for calibration using the following formula:
[[[STEP 1 VALUE ÷ 145] x 16 ] + 4.00] = New Proportional Cal Value
3.
Perform meter hookup as shown in the following figure – Set MODE SWITCH to FIELD
CAL position
Calculator
P
11
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