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Installation and Configuration Manual 23
Installation (Long Stem)
Installation (Short Stem) Electrical ConnectionsInstallation (Long Stem)Introduction
3.2.3 Entrained gas
Gas pockets can disrupt the measurement. A brief disruption in the signal caused by transient gas
pockets can be negated in the internal signal conditioning software, but more frequent disruptions or
serious gas entrainment must be avoided. This can be achieved by observing the following
conditions:
• Vent any gas prior to the viscosity meter.
• Avoid sudden pressure drops or temperature changes which may cause dissolved gases to
break out of the fluid.
3.2.4 Solids contamination
• Avoid sudden changes of velocity that may cause sedimentation.
• Install the meter far enough away from any build-up of solids.
• Maintain flow velocity at the sensor within the specified limits.
• Specify the long-stem 7827 meter with a non-stick PFA protective layer.
3.3 Open-tank installation
1. For open-tank installations, the long-stemmed 7827 meter is clamped to a structure (see
Figure 3-1). The position of the clamp determines the insertion depth.
Figure 3-1 Open-tank installation
2. Keep the tines away from the tank wall (see Figure 3-2).
Only the safe area model may be used in open-tank installation.