OPERATION
5
37
TT 51 SERIES
www.krohne.com
08/2015 - 4000754203 - MA TT 51 R03 en
5.6 Differences between a non-SIL and a SIL 2 device
5.7 Factory calibration of transmitter
The transmitters are delivered with a factory configuration Pt100 (
α
=0.00385), 4-wire connection
0...+100
°
C / +32...+212
°
F or configured according to customer's requirements. For detailed
information refer to
Factory settings for configuration
on page 28.
Due to the long-term drift of max.
±
0.01
°
C or
±
0.01% of span per year, a re-calibration of the
transmitter is normally not needed. Should you for any reason require the re-calibration, the
transmitter must be returned to the factory.
Function, behavior,
configuration
TT 51 C non-SIL
TT 51 C SIL
SIL mode on
SIL mode off
Error: short circuit
Off, upscale &
downscale
Upscale & downscale
Off, upscale &
downscale
Error: wire broken
Off, upscale &
downscale
Upscale & downscale
Off, upscale &
downscale
Error: low sensor
isolation (SmartSense)
Off, upscale &
downscale
Not available
Off, upscale &
downscale
Error: high lead wire
resistance (>> 25
Ω
)
Upscale
Upscale
Upscale
Error: transmitter
errror
Upscale & downscale
Upscale
Upscale & downscale
Error: loop voltage too
low
Downscale
Downscale
Downscale
Error: signal out of
range
NAMUR 43
NAMUR 43
NAMUR 43
Dual input redundancy
function
Available
Available
Available
Dual input sensor drift
monitoring
Upscale & downscale
Upscale & downscale
Upscale & downscale
Password protection
With & without
Always with (PW =
"0000")
With & without
MA_OPTITEMP_TT_51_en_150828_4000754203_R03.book Page 37 Friday, August 28, 2015 10:54 AM
