Kutai electronics EM81, EM121, EM83, EM123 Quick Manual Manual

EM81 / EM121
EM83 / EM123

Magnetic Pickups (MPU)

Is a measuring device for monitoring the speed of the driving force.

When a ferromagnetic object (Usually the generator’s flywheel gear)

passes by the tip of the MPU, it produces a magnetic field and the
MPU induced a voltage signal internally and the frequency of the
voltage as the input to the speed control signal and accurately
measure the prime mover speed.

Headquarters : No.3, Lane 201, Chien Fu St., Chyan Jenn Dist., Kaohsiung, TAIWAN

Tel : + 886-7-8121771 Fax : + 886-7-8121775 URL : http://www.kutai.com.tw

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2 EM81 / EM83 / EM121 / EM123

1. INTRODUCTION

Operated Range 500 to 10,000 Hz

Vibration 3G @100 ~ 2K Hz

Clearance 0.5 ± 0.15 mm

Operating Temperature -40 ~ 100°C

2. INSTALLATION

The location for installing the MPU usually
located on the top of the flywheel housing.
Before installing the MPU, rotate the flywheel to
confirm the shaft is aligned and not vibrating.
The connection of the two conducting wires must
be soldered, crimped and then wrapped with
insulating tape or connected via connecting
terminal to ensure proper isolation between the
two wires.

3. ADJUSTMENT

Install the MPU to flywheel housing and adjust the
clearance to 0.25 to 0.55mm from the tip of MPU
and the flywheel gear tip. MPU will fail and damage
if comes in contact with the flywheel during
operation. When installing, first tighten the MPU
until touches the flywheel gear tip, then counter
rotate one third (1/3) of a circle. (Every full rotate of
a circle creates 1.5mm clearance). Tighten the
fastening nut when the correct clearance is
adjusted.

4. DIMENSION

5/8"-18 UNF

Lock nut

THREAD

Unit : mm [ inch ]

L1

L2

L3

DC Resistance

Weight

Thread

EM81

68[2.68"]

80[3.15"]

150[5.91"]

95Ω ± 3%

80g ± 2 %

5/8"-18UNF

EM83

68[2.68"]

80[3.15"]

150[5.91"]

300Ω ± 3%

80g ± 2 %

5/8"-18UNF

EM121

108[4.25"]

120[4.72"]

150[5.91"]

95Ω ± 3%

105g ± 2 %

5/8"-18UNF

EM123

108[4.25"]

120[4.72"]

150[5.91"]

300Ω ± 3%

105g ± 2 %

5/8"-18UNF

Unit : mm [ inch ]

Installation Reference