Plantronics DYNZ-600 Series Operation And Calibration Of, DYNZ-60012 AND DYNZ-60013 SPEED, Switch

F-23371

Electronic Speed Switch Technical Manual

Page 4

requirements. If set/trip point of SW1 is correct it is

• OS-SW2 relay remains de-energized; therefore, its

properly calibrated. If set/trip point is incorrect, go to

contacts remain in the same position as shown on top

step 5.3.2, 5.3.3 and 5.3.4 and calibrate unit.

of unit.

5.4 CALIBRATION OR CHECKING PROCEDURE

6.1.3 When the engine is cranked and the engine

FOR OS-SW2 TRIP POINT

starts, SW1 energizes (non-latching) at its crank-

5.4.1 With no power applied to unit, connect an

dropout trip point setting which is normally set to trip

ohmmeter to terminals 7 and 9 (no other wires

midway between the cranking RPM and idle RPM of

attached). The ohmmeter should indicate zero

the engine.

resistance (short circuit). This is the normally closed

contact on relay OS-SW2.

6.1.4 When an overspeed

condition occurs, OS-SW2

5.4.2 Apply correct DC power to terminals 1 and 2 of

relay energizes and it will remain energized until the

frequency falls below the trip point at which time the

speed switch.

relay will de-energize (relay is non-latching with no

The ohmmeter connected to terminals 7 to 9 should

hysteresis). The engine over-speed setpoint is

normally adjusted to trip at 10 to 20% above the

now indicate infinite resistance (open circuit).

engine operating speed.

Originally

the signal generator

frequency was

set

Document

below the units set/trip point (see step 5.2.2);

6.2 CALIBRATION PROCEDURE

therefore, it must change states when power is

Equipment Required: Signal generator

applied.

Frequency counter Ohmmeter

NOTE

6.2.1 Determine the desired trip points for your unit

If

you are only checking calibration point, omit steps

when using a magnetic pickupOnly(MPU).

5.4.3 and 5.4.4 and go to step 5.4.5.

Reference

5.4.3 Adjust the signal generator frequency to the

No. of Gear Teeth x

desired OS-SW2 set/trip point as specified or

Trip Point in Hz = Engine RPM Trip Point

Uncontrolled

60

calculated in step 5.2.1.

5.4.4 Slowly turn the OS-SW2 potentiometer

6.2.2 Connect the signal generator and counter to

adjustment counterclockwise until the ohmmeter

terminals 5 and 6 with terminal 5 being the ground

indicates an open circuit. This gives you the correct

terminal. Set the signal generator frequency 100 Hz

setpoint for OS-SW2. Remember OS-SW2 latches.

below the SW1 or OS-SW2 trip point you are trying to

istorical

calibrate/set or check. Then adjust the out signal from

5.4.5 Slowly increase the signal ge

erator frequency

the signal generator to 1 volt rms or greater.

until the

ohmmeter

connected

to

terminals 7

to 9

NOTE

indicates

an open

circuit. Note

the frequency

and

Omit/skip step 6.2.3 if you are

only checking the

verify that it is correct for your OS-SW2 set/trip point

calibration points of the unit.

requirements. If set/trip point of OS-SW2 is correct it

is properly calibrated. If set/trip point is incorrect, go to

6.2.3 If you are calibrating unit, turn the desired trip

step 5.4.2, 5.4.3 and 5.4.4 and cal brate unit.

point potentiometer adjustment 4 or 5 turns clockwise.

For

H

6.3 CALIBRATION OR CHECKING PROCEDURE

6.0 OPERATION AND CALIBRATION OF

FOR SW1 TRIP POINT

DYNZ-60012 AND DYNZ-60013 SPEED

SWITCH

6.3.1 With no power applied to unit, connect an

6.1 OPERATING PROCEDURE

ohmmeter to terminals 10 and 12 (no other wires

Once the system has been wired, the SPEED

attached). The ohmmeter should indicate zero

SWITCH functions in the following manner.

resistance (short circuit). This is the normally closed

contact on relay SW1.

6.1.1No power applied to unit.

• SW1 and OS-SW2 relays are de-energized;	6.3.2 Apply correct DC power to terminals 1 and 2 of
therefore, contacts are in position as shown on top of	speed switch. The ohmmeter connected to terminals
unit.	10 to 12 should still indicate zero resistance, because
6.1.2 Power is applied to unit when POWER SWITCH	you should be below the trip point for SW1 and it
	should not change states when power is applied to
is turned on and no input signal to speed switch.	the unit.
• SW1 relay remains de-energized; therefore, its
contacts remain in same position as those shown on	NOTE
top of unit.	If you are only checking calibration point, omit steps
	6.3.3 and 6.3.4 and go to step 6.3.5.

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