Anderson LA Series 사용 설명서 - 페이지 11

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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.).

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

Determine Proportional Cal Value for calibration using the following formula:

[[[STEP 1 VALUE ÷ 145] x 16 ] + 4.00] = New Proportional Cal Value

Perform meter hookup as shown in the following figure – Set MODE SWITCH to FIELD

CAL position

Calculator

AGE