Product data

42
www.rosemount.com
Rosemount 5300 Series
October 2014
Accuracy over measuring range
The measuring range depends on probe type, dielectric
constant of the product and installation environment, and is
limited by the Blind Zones at the very top and bottom of the
probe. In the Blind Zones, the accuracy exceeds ±1.18 in. (30
mm), and measurements may not be possible. Measurements
close to the Blind Zones will have reduced accuracy.
The following conditions will impact the Blind Zones:
 If the single lead probes or twin probes are installed in a
nozzle, the nozzle height shall be added to the specified
Upper Blind Zone.
 The measuring range for the PTFE covered Flexible Single Lead
probe includes the weight when measuring on a high
dielectric media.
 When using a metallic centering disc, the Lower Blind Zone is
8 in. (20 cm), including weight if applicable. When using a
PTFE centering disc, the Lower Blind Zone is not affected.
Figure 1, Figure 2, and Figure 3 illustrate the accuracy over
measuring range at reference condition with alternating probe
types and varying dielectric constant of the product.
Figure 1. Accuracy Over Measuring Range for Single Lead Probes
Note
Measurements may not be possible in the Blind Zones, and
measurements close to the Blind Zones will have reduced
accuracy. Therefore, the 4-20 mA points should be configured
outside these zones.
Upper Blind Zone
Lower Blind Zone
Reduced accuracy
Reduced accuracy
±0.12 in.
(3 mm)
3.9 in. (10 cm)
9.8 in. (25 cm)
0.4 in. (1 cm)
±1.18 in.
(30 mm)
±0.12 in.
(3 mm)
3.5 in. (9 cm)
9.8 in. (25 cm)
4.7 in. (12 cm)
±1.18 in.
(30 mm)
Accuracy Accuracy
Blind Zone
Water (DC = 80) Oil (DC = 2)