Servicing And Troubleshooting - Emerson Rosemount 2120 Quick Start Manual

Quick Start Guide
7

Servicing and troubleshooting

7.1 Magnetic test point
A magnetic test point is marked on the side of the housing to allow a
functional test of the Rosemount 2120 in the overall system. By touching a
magnet to the target, the output from the level switch will change state
while the magnet is present.
Figure 7-1: Magnetic Test-point Function
Output off
Output on
7.2 Maintenance and inspection
• Only use a damp cloth for cleaning.
• Visually examine the level switch for damage. If it is damaged, do not
use.
• Ensure the housing cover, cable glands, and blanking plugs are fitted
securely.
• Ensure the LED flashing rate is 1 Hz or constantly on. (See
other flashing rates).
34
Metal housing
TP
Glass-filled-nylon
housing
DIRECT LOAD SWITCHING
MAGNETIC
~
TEST Supply 20 - 264Vac
POINT
50 - 60Hz 2VA
20 - 60Vdc 0.5W
2120D0AS1NAAA
Output Rating:
Load 20 - 500mA
41001029
MAX WORKING PRESSURE AT 20°C: 0.25 bar
MAX PROCESS TEMPERATURE: 150°C
MADE IN UNITED KINGDOM
*41001029*
www.rosemount.com
No magnet
TP
TP
DIRECT LOAD SWITCHING
MAGNETIC
~
TEST Supply 20 - 264Vac
POINT
50 - 60Hz 2VA
20 - 60Vdc 0.5W
2120D0AS1NAAA
Output Rating:
Load 20 - 500mA
41001029
MAX WORKING PRESSURE AT 20°C: 0.25 bar
MAX PROCESS TEMPERATURE: 150°C
MADE IN UNITED KINGDOM
*41001029*
www.rosemount.com
MAGNETIC
Magnet
Output on
Output off
Rosemount 2120 Level Switch
June 2020
TEST
POINT
Table 6-1 for