Operating Instructions

Table Of Contents
Symptom Cause Action
Display shows
6/2(
location or aiming:
poor installation
flange not level
check to ensure nozzle is vertical
use Auto False Echo Suppression (2.2.5.2 (Page 87)) and
check Auto Suppression Range (2.2.5.3) (Page 87) to
ensure nozzle protrudes from end of vessel nozzle.
Display shows
6/2(
antenna malfunction:
temperature too high
physical damage
check Current Internal Temperature (3.14.1) (Page 96)
relocate
Reading does not
change, but the level
does
SITRANS LR260 processing
wrong echo. For example, vessel
wall or structural member
re-locate SITRANS LR260
ensure nozzle protrudes 10 mm min.
rotate device 90°. See Orientation in a vessel with
obstructions (Page 27).
use Auto False Echo Suppression (2.2.5.2.) (Page 87)
and Auto Suppression Range (2.2.5.3.) (Page 87)
Measurement is con‐
sistently off by a con‐
stant amount
setting for Low Calibration Pt.
(2.2.1.6.) (Page 80) not
correct
setting for Sensor Offset
(2.2.1.25.) (Page 82) not
correct
check distance from sensor reference point to Low
Calibration Pt. (2.2.1.6.) (Page 80)
check Sensor Offset (2.2.1.25.) (Page 82)
Screen blank power error
check nameplate rating against voltage supply
check power wiring or source
too much load resistance
remove something from the loop, or
increase supply voltage
Reading erratic echo confidence weak
refer to Echo Confidence (2.2.4.5.1.) (Page 86)
use Auto False Echo Suppression (2.2.5.2.) (Page 87)and
Auto False Echo Suppression Range (2.2.5.3.) (Page 87)
use foam deflector or stillpipe
material filling
Re-locate SITRANS LR260
Reading response slow Fill Rate (2.2.7.2) (Page 90) set‐
ting incorrect
increase measurement response if possible
Reads correctly but oc‐
casionally reads high
when vessel is not full
detecting close range echo
build up near top of vessel or
nozzle
nozzle problem
clean the antenna
use Auto False Echo Suppression (2.2.5.2.) (Page 87)and
Auto Suppression Range (2.2.5.3.) (Page 87)
Level reading lower
than actual material
level
material is within Near Range
zone
multiple echoes processed
decrease Near Range (2.2.1.12.) (Page 81) (minimum
value depends on antenna type)
raise SITRANS LR260
ensure Algorithm (2.2.4.1.1.) (Page 82)is set to F (First
echo)
Diagnosing and troubleshooting
10.4 Operation troubleshooting
SITRANS LR260 with mA/HART
124 Operating Instructions, 11/2019, A5E32337683-AD