Dungs DMK/6 Petunjuk Instalasi - Halaman 3

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DMA ACTUATOR CALIBRATION AND ADJUSTMENTS

Calibrating the DMA

Note: The red and yellow switches are factory set outside of

the 0 to 90˚ operating range. Do not change these adjust-

ment dials until calibration is complete. DO NOT use these

switches in lieu of the calibration.

To Adjust Minimum Position

1. Apply a 4 mA DC input signal.

2. Turn the Y min (Zero) potentiometer (adjusting

range 0 to 100 % of stroke) to position the actua-

tor at the desired minimum position. Turning Y min

(Zero) CCW drives the minimum position towards

0˚.

To Adjust Maximum Position

1. Apply 20 mA DC input signal.

2. Turn the Y max (Span) potentiometer (adjusting

range 25 to 100 % of stroke) to position the actua-

tor at the desired maximum position. Turning Y max

(Span) CCW drives the setpoint towards 0˚.

Note: Y min (Zero) must be no more than 75 % of Y max

(Span) (reference: 90˚ = 100%). E.g. if the maximum position

is set at 85˚, the minimum position can be set at 64˚ maxi-

mum. (85˚ * 0.75 = 64˚).

Description

NEMA 4 metal enclosure

3 ... 3

Switch Adjustment:

Note: Use the scale under the Red ST1 switch to field set

the switches.The DMA incorperates two limit switches that

limit the crank shaft from exceeding a set point if the zero

or span potentiometer fails. The DMA also has an

SPDT auxilary switch. All switches can be adjusted

anywhere over the 90˚stroke.

ST1 Limit Switch (Red): This switch limits the mini-

mum position at 0˚ or more. Set the switch at approx.

1˚ LESS than the Y Min. setpoint. The small set

screw on the side of the red dial can be used for fine

tuning adjustment.

ST2 Limit Switch (Yellow): This switch limits the maxi-

mum position at 90˚ or less. Set the switch at ap-

prox. 1˚ MORE than the Y Max. setpoint. The small

set screw on the side of the yellow dial can be used

for fine tuning adjustment.

MV Auxiliary-Switch (Yellow): Set the switch to trip at

the desired setpoint using the scale under the Red

ST1 switch. When the motor is at 0˚, the NC contact 4

and 3 opens, and the NO contact 4 and 2 closes.

ACCESSORIES

Order No.

240-456