Reference Manual
Table Of Contents
- Rosemount 1408A Level and Flow Transmitter
- Contents
- 1 Introduction
- 2 Transmitter overview
- 3 Mechanical installation
- 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 Device software fault – Check firmware revision
- 7.2.3 General power supply fault – Check availability
- 7.2.4 Parameter error – Check data sheet and values
- 7.2.5 Device memory failure – Restore default settings
- 7.2.6 Simulation active – Check operational mode
- 7.2.7 Level measurement lost – Check application
- 7.2.8 Device temperature over-run – Clear source of heat
- 7.2.9 Device temperature under-run – Insulate device
- 7.2.10 Short circuit – Check installation
- 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
- 7.2.14 Max EEPROM write cycles expired – Check master and restart the device
- 7.2.15 Measurement range over-run – Check application
- 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
Related information
Product certifications
A.2 Functional specifications
A.2.1 General
Field of application
Continuous measurement of level and open channel flow.
Minimum dielectric constant
2
Measurement principle
Frequency Modulated Continuous Wave (FMCW)
Frequency range
77 to 81 GHz
Maximum output power
3 dBm (2 mW)
Internal power consumption
< 2 W (normal operation at 24 Vdc, no outputs)
< 3.6 W (normal operation at 24 Vdc, digital and analog outputs active)
Humidity
0 - 100% relative humidity, non-condensing
Turn-on time
< 15 s
(3)
A.2.2 Outputs
The transmitter provides two configurable outputs:
Output 1
Digital output / IO-Link mode
Output 2
Digital output or active 4-20 mA analog output
(3) Time from when power is applied to the transmitter until performance is within specifications.
Reference Manual Specifications and reference data
00809-0200-4480 May 2021
Reference Manual 67