6 Sensors
Digital Governor Basic System PANDAROS II 13
6.2 Magnetic pick-up IA ...
6.2.1 Technical data
Operating principle inductive sensor
Distance from sensing gear 0.5 ... 0.8 mm
Output 0 … 10 V AC
Signal form Sine (depending on tooth shape)
Resistance approx.. 52 Ohm
Temperature range -55°C … +125°C
Protection grade IP 55
Vibration < 10g, 10 ... 100 Hz
Shock < 50g, 11 ms half sine wave
Corresponding plug SV 6-IA-2K (EDV- No.: 010-02-170-00)
6.2.2 Installation
The installation of the pick-up has to be arranged in such a way as to obtain a frequency
as high as possible. Normally, the HEINZMANN governors of the series Pandaros are
designed for a maximum frequency of 9000 Hz. Frequency (by Hz) is calculated ac-
cording to the formula
f
(Hz)
=
z = number of teeth on the pick-up wheel
Example:
n = 1.500
z = 160
f =
= 4.000 Hz
It should be taken care that the speed can be measured by the pulse pick-
up without any bias. For best results therefore, the speed pick-up should
take the engine speed from the crankshaft. A suitable position for this is,
e.g., the starter gear but not the injection pump wheel.
The pick-up gear must consist of magnetic material (e.g., steel, cast iron).
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