Bently Nevada 3300/46, Operation Manual

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Ramp Differential Expansion Monitor Maintenance
1 13 I C a l i b r a t e Channels [Conti
8. Activate the Channel A gain adjust dip
switch (GA) by moving it to the left. The
Channel A bargraph will begin t o flash.
Measure the voltage at Test point Channel A
(TA) using the multimeter. Adjust the power
supply to the Full Upscale Voltage (FUSV)
(reference Table 10).
9. Press the GAP switch and use the System
Monitor ('1') and (1) switches to adjust the
gain until the Test point Channel A (TA) is at
+5.0 ±0.05 Vdc and the BYPASS LED is on
steady (not flashing). The flashing BYPASS
LED indicates an overrange condition. If this
occurs, reduce the gain using the System
Monitor (1) switch.
10. Deactivate the Channel A gain adjust dip
switch (GA) by moving it to the right. If the
short i s removed f r o m t h e calibration
terminals (CA) before t h e d i p switch i s
deactivated, t h e adjustment will n o t b e
stored.
11. Repeat steps 8 through 10 for Channel B
substituting GB and TB.
84414-01
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