Operating Instructions

Table Of Contents
L
Language, 148
LCD display
contrast adjustment, 146
echo profile viewing, 56
fast mode, 145
measurement mode, 47
lens
replacement, 155
lid-lock set screw, 38
linearization via AMS, 88
Lithium batteries
Safety, 45
Local User Interface (LUI), 47
LOE
Fail-safe Mode, 232
loop test
simulate analog output, 78
loop voltage vs. loop resistance
power supply requirements, 40
loss of echo (LOE)
explanation, 232
LUI (Local User Interface)
contrast adjustment, 47
M
mA output
select analog output, 78
maintenance,
calibration schedules, 77
repairs, 153
replacing antenna, 155
replacing lens, 155
service schedules, 77
maintenance settings, 130
Calibration Interval, 143
see Remaining Sensor Lifetime, 137
Service Interval, 139
Manuals, 251
Master Reset
factory defaults, 131
factory defaults via AMS, 85
measurement range
blanking via Near Range, 229
extension via Far Range, 229
Measurement Response
explanation, 229
Modifications
correct usage, 17
improper, 17
mounting
bypass requirements, 29
handheld programmer access, 28
housing construction, 24, 29
nozzle design, 26
nozzle location, 26
on vessel with obstructions, 29
sunshield recommended, 29
N
Namur NE43, 113, 232
Near Range
explanation, 229
setup, 121
O
Operating Instructions, 251
operating principles
cleaning, 223
overview, 19
P
password protection
via AMS, 98
via PDM, 82
PDM
see SIMATIC PDM, 63
PED (Pressure Equipment Directive), 23, 235
performance
specifications, 165
PIN to unlock
local access, 147
pipe sizes, 214
flange mounting, 213, 216
polarization reference point, 29
power, 165
power source
requirements, 37
power supply requirements
loop voltage vs. loop resistance, 40
pressure applications, 23
Pressure Equipment Directive, 23, 235
Process Intelligence, 223
process temperature
maximum, 233
Index
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 267