Even if the upper product level drops, it is ignored by the transmitter which continues to
measure only the interface level. If the product level drops, the air filled region in the
upper part of the pipe will slightly reduce the measurement accuracy of the interface level.
To achieve high accuracy in this measurement mode the probe must be fully submerged.
Set the measurement mode
The Measurement Mode Interface Level with Submerged Probe is used to handle interface
measurements when the product level is not visible, for example in a full chamber pipe.
Prerequisites
Note
Do not set Measurement Mode to Interface Level with Submerged Probe in “standard”
applications when both Product Level and Interface Level are measured.
Procedure
1. Select
Configure
→
Manual Setup
→
Level Setup
→
Environment
.
2. Under
Measurement Mode
, select
Interface Level with Submerged Probe
(
Interface
Only
in handheld communicator), and then select
Send
.
Note
Adjust Interface Threshold if the interface level pulse is not detected.
6.5.4
Resolve noise or weak surface echoes
In difficult applications where the surface echo peak is low compared to the noise, it is
recommended to set the Performance Mode to High Performance. A low surface peak
compared to the noise might be caused by a turbulent surface, foam, low dielectric
constant, plastic tanks, and so on.
If the Performance Mode is set to High Performance, each update is based on an increased
number of measurements (radar sweeps), which gives improved accuracy and robustness,
as well as decreased noise in the output value. However, the battery life is significantly
reduced (between 40-60 percent).
Prerequisites
The High Performance mode is not supported on all models.
Procedure
1. Select
Service Tools
Echo Tuning
Advanced
.
2. Under
Performance Mode
, select
High Performance
, and then select
Send
.
6.6
Replace power module
Prerequisites
Replace the power module with a new Black Power Module, SmartPower
™
Solutions model
number 701PBKKF.
Reference Manual
Service and troubleshooting
00809-0100-4308
February 2020
Reference Manual
135
Содержание Rosemount 3308A
Страница 8: ...Contents Reference Manual February 2020 00809 0100 4308 viii Rosemount 3308 Series ...
Страница 10: ...Introduction Reference Manual February 2020 00809 0100 4308 10 Rosemount 3308 Series ...
Страница 22: ...Transmitter overview Reference Manual February 2020 00809 0100 4308 22 Rosemount 3308 Series ...
Страница 74: ...Installation Reference Manual February 2020 00809 0100 4308 74 Rosemount 3308 Series ...
Страница 96: ...Configuration Reference Manual February 2020 00809 0100 4308 96 Rosemount 3308 Series ...
Страница 194: ...Product Certifications Reference Manual February 2020 00809 0100 4308 194 Rosemount 3308 Series ...
Страница 222: ...Configuration parameters Reference Manual February 2020 00809 0100 4308 222 Rosemount 3308 Series ...