user manual

Reference Manual

00809-0700-4530, Rev AA

Section 5: Troubleshooting Procedures

September 2013

Troubleshooting procedures

Figure 5-3. Rosemount 5300 Series with DVC - Echo curve presentation in RRM

In a typical measurement situation, the following peaks appear in the echo curve:

Reference peak. This reference pulse is caused by the transition between the transmitter head

and the probe/antenna. For the Rosemount 3300 and 5300 Series, the pulse is negative, while

for the Rosemount 5400 and 5600 Series, the pulse is positive, see Figure 5-6 on page 68. For

Rosemount 5301 with DVC, the seal pulse is used as reference. See Table 5-2 on page 67 for the

typical reference pulse amplitudes for the Rosemount 5300 Series.

Reference reflector peak (Rosemount 5300 with DVC only). This reference reflector pulse is

caused by the transition between reference reflector and continuing part of the probe. The

pulse is negative, but not as strong as the reference pulse. In RRM, it should be labelled as P2

other or P3 other (if surface echo/centering disk is present) after vapor compensation is

calibrated, see “Commissioning” on page 35. The amplitude of the reference reflector peak is

dependent on the installation (chamber diameter) and the process conditions of the

application. See also Figure 4-5 on page 55.

Surface peak. This pulse is caused by a reflection of the product surface. See Table 5-1 for

typical surface peak amplitudes for the Rosemount 5300 Series. Note that the amplitude is

dependent on the dielectric constant of the media, transmitter type, probe/antenna type,

process conditions (vapor, turbulence, foam etc.), distance to echo, etc.

Probe end peak. This probe end pulse is caused by the transition between the probe end and

the surrounding media. The pulse can be positive or negative depending on if or what type of

centering disk is used, see Figure 5-4 and Figure 5-5. Note that the probe end pulse is not visible

when measuring on a high dielectric media, such as water.