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using :
- External screw,
- LCD display with push buttons,
- Hand Held communicator,
- Hart Explorer software (if zero adjustment is performed after span adjustment, the 100%
point may not be adjusted correctly).
Zero point is 4 mA output signal (LRV) and span is 20 mA output signal (URV). To adjust and
specify these values, display the measured values (LRV, URV) with the portable communicator
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6.1 Adjustment procedure with the external screw
6.1-1 Zero adjustment
Zero point of the transmitter is adjustable by the external
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Note :
If the transmitter has an indicator, remove it to access the
setting switch.
(1) Select ZERO position
(2) Apply standard input pressure corresponding to Lower
Range Value (LRV).
(3) Adjust zero point (4 mA) by turning the external screw
ADJUSTMENT AND SETTING
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case to make following adjustments with active DC power supply.
DANGER
For zero suppression or elevation ranges,
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the 4/20 mA output signal using the external
adjustment screw.
Note :
1)
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adjusted by the external adjustment
screw.
2) When a digital indicator is attached to
the transmitter, make sure that the LCD
lamp “ZERO” is ON.
Increase
Decrease
Fine adjustment
: turning slowly
(approximately 5sec per turn)
Rough adjustment : turning quickly
(approximately 1sec per turn)
After adjustment, the transmitter must be kept energized for at least 10
seconds data recording completion into memory.
INDICATION
External adjustment screw
Set switch
to “ZERO”
position for
zero calibration
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