jcb JS 200 Series, Service Manual

Page: 200 / 531

10 - 6
Section C Electrics
9803/6400
Section C
10 - 6
Issue 1
CAPs II Diagnostic system
Calculating max. engine water temperature reached and max. hydraulic oil temperature reached
The values given in channel 4 monitor window 8, mode window 9, clock screen value X are digital values and need to be
converted to a temperature value using the formula.
Resistance = 1000 x value X
255 - value X
This resistance value will then relate to a temperature on the temperature graph on the following page.
FOR EXAMPLE:
The value given for the max engine water temperature reached is 95
Using the formula
Resistance = 1000 x value X ( which is 95 )
255 - value X ( which is 95 )
therefore:
Resistance = 1000 x 95
255 - 95
Resistance = 95000 = 593.75 ohms (Remember 1kû = 1000 û.)
160
Relating this value to the temperature graph on the following page gives a temperature of 97°c
Therefore max temperature reached by engine water is 97°c
This procedure is the same for calculating max. temperature reached by hydraulic oil.