Reference Manual
Table Of Contents
- Rosemount 1408H Level Transmitter
- Contents
- 1 Introduction
- 2 Transmitter overview
- 3 Mechanical installation
- 3.1 Safety messages
- 3.2 Installation considerations
- 3.3 Mounting preparations
- 3.4 Mount transmitter on tank
- 4 Electrical installation
- 5 Configuration
- 6 Operation and maintenance
- 7 Service and troubleshooting
- 7.1 Safety messages
- 7.2 Diagnostic messages
- 7.2.1 Device hardware fault – Device exchange
- 7.2.2 General power supply fault – Check availability
- 7.2.3 Device software fault – Check firmware revision
- 7.2.4 Parameter error – Check data sheet and values
- 7.2.5 Short circuit – Check installation
- 7.2.6 Device memory failure – Restore default settings
- 7.2.7 Level measurement lost – Check application
- 7.2.8 Simulation active – Check operational mode
- 7.2.9 Device temperature over-run – Clear source of heat
- 7.2.10 Device temperature under-run – Insulate device
- 7.2.11 Primary supply voltage over-run – Check tolerance
- 7.2.12 Primary supply voltage under-run – Check tolerance
- 7.2.13 Maintenance required - Cleaning
- 7.3 Troubleshooting incorrect level readings
- 7.3.1 Reported level is too high or low
- 7.3.2 Level is stuck in measuring range
- 7.3.3 Level is stuck in full tank
- 7.3.4 Level value drops when close to antenna
- 7.3.5 Measured level fluctuates
- 7.3.6 Measured level is occasionally unstable
- 7.3.7 Lagging of measured level
- 7.3.8 Incorrect level at 100% (20 mA)
- 7.3.9 Incorrect level when product surface is above 50%
- 7.3.10 Dropping of level close to tank bottom
- 7.3.11 Level measurement is lost in an empty tank
- 7.3.12 Alarm mode close to tank bottom
- 7.4 Managing disturbance echoes
- 7.5 Service and troubleshooting tools
- 7.6 Service support
- A Specifications and reference data
- A.1 Performance specifications
- A.2 Functional specifications
- A.3 Physical specifications
- A.4 Dimensional drawings
- B Product certifications
- C Configuration parameters
7.2.6 Device memory failure – Restore default settings
Alarm classification
Device status
Functional Check
Class
Error
Possible cause
Configuration data has been corrupted, for example, due to a power loss during writing.
Recommended actions
1. Restore default settings, restart device, and reconfigure the device.
2.
If the condition persists, replace the device.
Related information
Restore to factory settings
Perform a device reset
7.2.7 Level measurement lost – Check application
Alarm classification
Device status
Functional Check
Class
Error
Possible cause
No valid level reading. Reasons may be multiple:
• No valid surface echo peak in the measuring range
• Incorrect device configuration
Recommended actions
1. Analyze the Echo Peaks and check device configuration, especially General
Threshold.
2. Check device physical installation (for instance antenna contamination).
3. Consider increasing Measurement Recovery Time parameter for intermittent
conditions.
4. Restore default settings, restart device, and reconfigure the device.
5. If the condition persists, replace the device.
Related information
Analyze the echo peaks
Adjust the general threshold
Measurement recovery time
Restore to factory settings
Service and troubleshooting Reference Manual
September 2020 00809-0100-4480
48 Rosemount 1408H Level Transmitter