Anderson LA Series Instrukcja obsługi - Strona 8

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8
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2.4 CALIBRATION VERIFICATION - UTILIZING ON-BOARD SETUP

2.4 CALIBRATION VERIFICATION - UTILIZING ON-BOARD SETUP
2.4 CALIBRATION VERIFICATION - UTILIZING ON-BOARD SETUP
2.4 CALIBRATION VERIFICATION - UTILIZING ON-BOARD SETUP
2.4 CALIBRATION VERIFICATION - UTILIZING ON-BOARD SETUP
Utilizing a digital multimeter attached to the on-board testpoints, the LD/LA transmitter may be
switched to an alternate output mode where the signal viewed on the meter is proportional to
the current calibration range of the transmitter. Hookup is as follows:

FIGURE 2-5 CURRENT CAL VERIFICATION HOOKUP

FIGURE 2-5 CURRENT CAL VERIFICATION HOOKUP
FIGURE 2-5 CURRENT CAL VERIFICATION HOOKUP
FIGURE 2-5 CURRENT CAL VERIFICATION HOOKUP
FIGURE 2-5 CURRENT CAL VERIFICATION HOOKUP
HOOK METER TO
TESTPOINTS
FOR CALIBRATION
RED METER LEAD
(TEST+)
As shown, set operating switch to CURRENT CAL position. The signal displayed on the meter
at this point is directly proportional to the current SPAN setting of the sensor. Using the
following procedure, this value can be converted to the "Inches of Water Column" calibration
value:
•
Perform calculation to determine current inches of Water Column calibration
[[Meter Reading – 4.00] ÷ 16] x 145 = Current Cal in "w.c.
•
Once calibration has been determined, move switch back to RUN position to
continue operation
•
If value determined matches value in model number, unit is properly calibrated
•
If value does not match value in model number, sensor calibration has been
altered since unit left the factory – see sections that follow for proper re-calibration
procedures
METER MODE
SET TO DC MILLIAMP
DC mA
BLACK METER LEAD
(TEST-)
TEST-
TEST+
LOOP+
LOOP-
Note: Proper loop wiring must be established,
not shown for clarity
Set to CURRENT CAL