Max Machinery 272-5X8 BIDIRECTIONAL TRANSMITTER (210_240 SERIES FLOW METERS) - Manual (Page 11)

USER OPTIONS AND ADJUSTMENTS
(Over Range Indication)
Output Over Range Indication: This LED will start to blink if the transmitter output amplifier
begins to saturate (clip). This happens when the flow rate or gain is too high and will cause the
output voltage to be less than it should be. Figure 9 shows what happens as output saturation
occurs.
The diagram below shows what happens as output saturation occurs.
The flow rate in a system may have as much as 50% to 100% ripple. This may be caused by the
pump, by lots of air in the line and a slightly sticky flow meter, or by other reasons. The maxi-
mum output voltage of the Model 272 must be kept low enough so that the output is not saturated.
This may mean that the average full scale output voltage will have to be much less than 10 V to
avoid clipping the peaks in the output signal (See Fig. 10).
Ripple Adjustment (272-5X5 and 272-5X8 Transmitters Only)
This adjustment will have to be made if the transmitter is unscrewed from the flow meter.
The 272-5X5 and the 272-5X8 are made to compensate for the non uniform rotational rate of
the 210 series piston meters. To take advantage of this feature, the stator of the Model 272
must be positioned correctly for each meter it is mated to.
272-500-350 © 1996 (Rev. 8/00) Max Machinery, Inc. Page 11
Discontinued