2.22
2.12 Reading flowmeters
The optional flow monitors are provided to control and measure the flow of sample
gas through the analyser. The flow monitor consists of a needle valve and a
rotameter type flowmeter. The reading of the flow rate through the flowmeter is
obtained by observing the scale indication at the top of the float.
2.13 Power up
The xentra may now be powered up. A message sequence will be displayed, eg:
SYSTEM OK
xentra 4900
REV 4900/652/XX
MODEL 4902B1 0302
2100 24101 00011
SERIAL NO XXXX
ORDER NO XXXXXX
MEASURING
The measurement display should now appear. If the display is unclear then the
display viewing angle may be adjusted using a small cross-point screwdriver. See
Figure 1.1 for location of the viewing angle adjustment potentiometer, this is
accessed from the bottom of the front fascia.