4.6
Oil Pressure
Daqu — Manual
Option
Selection/Setting
Channel
Any B, D or E
Function
Oil pressure
Sensor
Active 0.5 – 4.5 V
Report time
0.5 – 1.0 s
Filter
2.0 s
Max value (at 4.5 V)
10
Table 9:
An example of active pressure sensor with 0.5 – 4.5 V output. Max
value is set to 10 bar.
Option
Selection/Setting
Channel
Any A, but A13
Function
Oil pressure
Sensor
Res. 10 – 180 Ohm
Report time
0.5 – 1.0 s
Filter
2.0 s
Max value (at 180 Ohm)
10
Table 10:
An example of passive VDO pressure sensor with
10–180
Ω output.
Max value is set to 10 bar.
10 – 180
Ω range. Unloaded sensor will give 10 Ω and maximally loaded
sensor will have 180 Ω resistance.
3 – 160
Ω range. When unloaded sensors gives 3 Ω and under max load
it gives 160 Ω.
240 – 33
Ω range. This range is reversed. Sensor with no load has 240
Ω resistance and under maximal load it has 33 Ω.
We recommend using active type pressure sensors. Passive (resistive) sensors
may be sensistive to ground loops and shall be generally avoided.
Resistive sensor are sometimes installed on the firewall rather than directly
on the engine. This may reduce problems with premature sensor failures due
to engine vibrations. In this case, a high pressure hose connects the engine oil
pressure measuring port with the oil pressure sensor. These sensors may have
isolated return and are two wire sensors. This means that slightly different
schematics is required – see section 3.3.2 for more details. Configuration is
identical to the one wire sensor.
©
Kanardia
2019
34
