Dual Valve Position Indicator Maintenance
13 I CALIBRATE CHANNELS (LVDT) [CONY]
AC
z e
00: - - 0 0
1.
€
O
e a i • 4
1
LVDT CORE
FULL
SCALE POSITION
XORIENTATi
ON VARKS
I 0 7
I / ,
C
O
R
E
EXTESI
ON>
R
O
O
I
r
I
8. Note: It is important that the zero has been adjusted before adjusting the gain.
84608-01
9. Perform the span adjustment as follows: With the valve fully open (core positioned at the 100%
mark) connect a voltmeter to
GB
(Gain Channel B) test point (TP8) referenced to the
AC
test
point (TP19). Adjust the
GB
pot (R219) for +5.0 Vdc +1- 5mVdc. A t this point the display should
read 100% Open and the recorder output should be at full scale.
22
Summary of Contents for 3300/70
Page 5: ...Dual Valve Position Indicator Operation 8 4 6 0 7 0 1 Blank Page i v...
Page 7: ...Dual Valve Position Indicator Operation 8 4 6 0 7 0 1 Blank Page v i...
Page 21: ......
Page 25: ...Dual Valve Position Indicator Maintenance 8 4 6 0 8 0 1 Blank Page i v...
Page 27: ...Dual Valve Position Indicator Maintenance 8 4 6 0 8 0 1 Blank Page v i...
