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
Table 7-1: Echo Peak Types
Type Description
Surface Echo tracked as the current surface echo
Unknown Echo identified as unknown (can be a surface candidate)
Suppressed Echoes that are identified but suppressed by the device
Tank bottom echo Echo considered as an echo from the tank bottom
7.5.2 Perform a device reset
The function is used to reset/restart the electronics without re-cycling the power.
Procedure
1. Under
Menu, select Parameter → Service Tools → Maintenance.
2. Select Device Reset.
7.5.3 Restore to factory settings
This function restores the transmitter to factory settings (user configuration is
overwritten).
Procedure
1.
Under
Menu, select Parameter → Service Tools → Maintenance.
2. Select Restore Factory Settings.
7.5.4 Use the simulation mode
It is possible to set the level to a simulated value for testing purposes. The simulated value
affects both digital and analog output.
Procedure
1.
Under
Menu, select Parameter → Service Tools → Simulation.
2. In the Simulated Level box, enter the desired value.
3. Select Write to device.
4. Select Start simulation (60 min).
7.5.5 Calibrate analog out
Use this function to calibrate the analog output by comparing the actual output current
with the nominal 4 mA and 20 mA currents. Calibration is done at factory and the analog
output does not normally need to be recalibrated.
Prerequisites
Connect a calibrated ampere meter to the analog output loop.
Service and troubleshooting Reference Manual
September 2020
00809-0100-4480
66 Rosemount 1408H Level Transmitter