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) =
60
*
min)
/
1
(
z
n
z
=
number of teeth on the pick-up wheel
Example:
n
=
1.500
z
=
160
f
=
60
160
*
1500
= 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).
