KROHNE TT 51 SERIES EN - Manual (Page 23)

APPENDIX
8
23
TT 51 SERIES
www.krohne.com 09/2010 - 4000869801 - AD TT 51 SIL R01 en
8.3 Return / maintenance form
Customer details
Device details
If yes please fill out the table with following check points.
Before you begin, configure the TT 51 for RTD measurement 3-wire connection on both
channels. Select measuring range 0...+100°C, output – dedicated dynamic variable Ch1 select
sensor break and sensor short circuit to downscale, therefore to upscale value.
Select even sensor backup.
Proof test check points
Company:
Address:
Contact person:
Telephone:
Fax:
Email:
Product ID:
Serial no.:
Reason for the return / maintenance:
Have you performed the proof test on the product? Yes No
Step Description Yes No Comments
1 Connect the selected sensors on Ch 1 and Ch2 and
check for the output range value is within measuring
range.
2 Simulate sensor break for each single wire (on
terminals 1...5) and check the output value (≥21 mA) /
(≤3.6 mA).
3 Simulate sensor short between 1...5 terminals and
check the output value (≥21 mA) / (≤3.6 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 23 Thursday, September 9, 2010 4:19 PM