3300/25 Dual Accelerometer Input Monitor Operation Manual
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15.3 Calibrate the Channels
(Repeat for channels A and B)
1. Measure the proportional signal output at TP39 (BPPLA) for Channel A and TP40
(BPPLB) for Channel B. The testpoint locations are shown in the figure below. The
voltages at these testpoints should match the voltages listed in the following table.
TRIP MULTIPLY OPTION PROPORTIONAL OUTPUT (Vdc)
NONE
2X
3X
+5.000
+2.500
+1.670
2. Adjust potentiometer GA (gain adjust A) for Channel A, and GB for Channel B, to
the appropriate Proportional Output (Vdc) shown above.
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