KROHNE TT 51 SERIES EN - Manual (Page 12)

6
PERIODIC CHECKS / PROOF TESTS
12
TT 51 SERIES
www.krohne.com 09/2010 - 4000869801 - AD TT 51 SIL R01 en
Proof test check points
• Repeat configurations points 7...8.2 of the proof test configuration and change to down scale
error value (≤3.6 mA).
• Repeat all check points (to be sure the transmitter is not stuck in some of conditions).
8 Select device information tab. Specify a mounting date in tag field.
8.1 Describe the proof test in the description field and date of the test.
8.2 Specify any other information in the message field.
Step Description
Step Description Yes No Comments
1 Connect the selected sensors on Ch 1 and Ch 2 and
check for the output range values.
2 Simulate sensor break for each single wire and check
the output value (≥21 mA).
3 Simulate sensor short between 1...5 terminals and
check the output value (≥21 mA).
4 Simulate sensor break or sensor short (one error at a
time) for sensor connected on Ch 1. Check if the
transmitter will switch automatically over to
measuring on Ch 2.
.book Page 12 Thursday, September 9, 2010 4:19 PM