Bently Nevada 3300/46, Operation Manual

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0 R a m p Differential Expansion Monitor Maintenance
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jCalibrate Channels [Cont]
12. Activate the meter adjust dip switch (MA) by
moving it to the left. The differential expansion
signal will begin to flash on the left LCD display.
13. Measure the voltage at test point channel
A (TA) using the multimeter. A d j u s t both
power supplies to ZPV (reference Table 9).
Press the GAP switch and use the System
Monitor (r) and (1) switches t o adjust the
voltage at TA to +2.5 ±0.03Vdc.
14. Deactivate the meter adjust dip switch (MA)
by moving i t t o the right. I f the short is
removed from the calibration terminals (CA)
before t h e dip switch i s deactivated, t h e
adjustment will not be stored.
15. Remove the clip lead (jumper) from the
calibration terminals (CA).
84414-01
11 0 . 0 . 3
eit•
TABLE 10. Formulas for Full Upscale Volts
Full Upscale Volts
(FUSV) Vdc Y . co E 7
Single Ramp Option P r o b e A
Direction D u a l Ramp Option P r o b e A or B
'Upscale To w a r d
.pr bp A
Upscale Away
from Probe A
1.. I 0
Probe B
17. ZPV + (0.5 sin Ci)(TSF)(MR) Z P V + (0.5 tan e)(TSF)(MR)
. / . 0 9 6 0 c t " ' 11C,° '
,).0
✓
C , . 5 -
ZPV - (0.5 sin e)(TSF)(MR) Z P V -(0.5 tan e)(TSF)(MR)
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