Theory
Rev A 05/01/01 // SB
190113_A
47
A
V
6.2
THEORY 2. OPERATION OF PISTON SIDE LOAD SENSOR
Measuring current:
The ammeter
is used to measure current at the piston side input signal. Remove the wire from
X1:21 terminal in the central unit and measure the current with the ammeter in series. The
measurement should be between 4..20mA.
Measuring voltage:
The voltmeter
is used to measure voltage between pins
X1:21 (piston side signal) and X1:22 (gnd) on the main board
(024-352-300-001. The resistors are there to show that at 4mA
the voltage is 1.1V because current multiplied with resistance
equals voltage; therefore, 4mA x 275 ohms (total resistance) =
1.1V.
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