Bently Nevada 3300/48, Operation Manual

Page: 51 / 79

Case Expansion Monitor Maintenance
84418-01
12
Test OK Limits [Conti
7. Adjust the power supply to Zero Vdc. Verify that the
OK LED comes back on and the OK relay energizes
(if non-latching OK mode is selected). Press RESET
switch on the system monitor to reset latching OKs.
8. Reverse the polarity o f the power supply b y
switching the leads. Gradually increase the power
supply voltage until the OK LED turns off (Lower
Limit). Verify that the Lower OK Limit is within the
limits specified in table 5.
9. Verify that the OK relay de-energizes.
10. When finished, disconnect the power supply and
multimeter and reconnect COM and IN wiring to the
channel A terminals on the Signal Input Relay Module.
Verify that the OK' LED comes on and the OK relay
energizes (if non-latching OK mode is selected). Press
RESET switch on the system monitor to reset latching
OKs.
Table 5
Transducer Lower OK Limit U p p e r OK Limit
1 Inch LVDT
2 Inch LVDT
4 Inch LVDT
-5.65 to -6.05 Vdc
-12.80 to -13.20 Vdc
-8.90 to -9,30 Vdc +5.65 to +6.05 Vdc
+12.80 to +13.20 Vdc
+8.90 to +9.30 Vdc
3 3 0 0 1 . . 0
CASE EXPANSION
MONITOR
(
Ocee 0 IPEC10
OAL, 0 F F 0
0— BYPASS —0
❑ ❑
AUNT
eUFTERED TEVMOJCERS
2 0
•
•