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D-Series
Master Installation, Operation & Maintenance
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GO Switch: Options L2/L4/Z2/Z4
Calibration Procedure
Never perform switch calibration while an area is known to be hazardous.
For intrinsically safe models with L2/L4, the unit must be wired in accordance with the control drawing S-K127 and S-K127A.
For intrinsically safe models with Z2/Z4, the unit must be wired in accordance with the control drawing ES01179-1.
GO Switch calibration may be performed using a Volt-Ohm meter with the Ohm setting across COM and NO. When the switch is active, the meter will read ≤0.5 Ohms, or the Diode setting may be used simply to indicate continuity. If a 120VAC source is used, an appropriately sized resistor must be used in series to limit current to a maximum of 1.5 Amperes when circuit rating is unknown or permanent damage may occur.
For L2/Z2 models mounted in parallel orientation (see illustration on page 18)
Step 1: With the valve CLOSED position. Push down and slide the target magnet #1 until SW1 activates. Release the target magnet to lock the position.
Step 2: Rotate the valve to the OPEN position. Push down and slide the target magnet #3 until SW3 activates. Release the target magnet to lock the position.
Step 3: Cycle the valve CLOSED and OPEN several times to ensure proper calibration.
For L4/Z4 models mounted in parallel orientation (see illustration on page 18)
Step 1: With the valve CLOSED position. Push down and slide the target magnet #1 until SW1 activates. Release the target magnet to lock the position. Push down and slide the target magnet #3 until SW3 activates. Release the target magnet to lock the position.
Step 2: Rotate the valve to the OPEN position. Push down and slide the target magnet #2 until SW2 activates. Release the target magnet to lock the position. Push down and slide the target magnet #4 until SW4 activates. Release the target magnet to lock the position.
Step 3: Cycle the valve CLOSED and OPEN several times to ensure proper calibration
For models mounted in perpendicular orientation, the target disk will have to be rotated to realign the target disk to match the
desired orientation. (see illustration on page 18)
Step 1: Grasp the target disk and gently lift until the target disk disengages the orientation pin in the shaft.
Step 2: Rotate the disk as needed to realign the targets. Use the images provided on the previous page as a reference. Step 3: Follow steps 1 through 3 for models mounted in Parallel orientation above.
For reverse acting applications (Counterclockwise to close), the switch functions will be transposed. Sw 1 (and Sw 3 if in an
L4/Z4 model) become open. Sw 2 (and Sw 4 if in an L4/Z4 model) become closed.
The “push to set” target disk has been designed to accommodate various applications and rotations. If your application is different from those outlined here, please consult the factory for further information.
Repeatability .002" (.05 mm)
Response TimeDifferential
Operating Temperature Contact Material Forms Ratings Target Material Sensing Range
Sensing Range with Target Magnet
Approx. 5/32" (4 mm) -40° to 221°F (-40° to 105°C) Silver cadmium oxide, gold flashed SPDT, Form C
4A@120VAC / 3A@24VDC Ferrous metal
Approx. 1/10" (2.5 mm) 3 5/8" (92mm) (max)
