Siemens LR200 Quick Start Manual page 23

Maintenance
SITRANS LR200 requires no maintenance or cleaning under normal operating conditions. If
cleaning becomes necessary under severe operating conditions:
1. Note the antenna material and the process medium, and select a cleaning solution that
will not react adversely with either.
2. Remove the device from service and wipe the antenna clean using a cloth and suitable
cleaning solution.
Unit Repair and Excluded Liability
For detailed information, please see the inside back cover.
Maximum Process Temperature Chart
WARNING: Internal temperature must not exceed 80 °C (176 °F).
Maximum Flange and Process Temperatures versus allowable ambient
for flange adapter versions of SITRANS LR200
• The chart is for guidance only.
• It does not represent every
possible process connection
arrangement. For example, it will
NOT apply if SITRANS LR200 is
mounted directly on a metallic
vessel surface.
• It does not take into consideration
heating from direct sunshine
exposure.
• You can use parameter 3.14.1 to
monitor the current internal temperature.
Loop power
Typical connection drawing
: Loop voltage is the voltage at the
Note
terminals of the power supply (not the
voltage at the terminals of the device).
Page EN-22 SITRANS LR200 (HART) – QUICK START MANUAL
90
80
70
60
50
40
PP rod
30
temperature
20
(no flange)
10
0
0 10 20 30 40 50 60 70
Process Flange Surface Temperature (
- loop resistance
loop
voltage power
supply
VL
loop current IL
+
flange process
tempera- tempera-
ture ture
80 90 100 110 120 130 140 150
o
C)
RL
LR200
7ML19985XC81
160