KROHNE OPTITEMP TR 100-TC 100 EN - Manual (Page 16)

4
ELECTRICAL CONNECTIONS
16
OPTITEMP TR/TC 100
www.krohne.com 10/2009 - 4000630002 - MA OPTITEMP TR/TC 100 R02 en
4.5 Wiring variants
4.5.1 Pt100 measuring inserts
Resistance thermometers are connected acc. to DIN EN 60751 in three different wiring variants.
Of the three, the 3-wire connection is the most frequently used in the industry:
Applications and features
• The 2-wire connection is used with short cable connections and minimal requirements for
accuracy.
• The 3-wire connection is the industry standard and largely eliminates the effect of supply
resistance.
• The 4-wire connection completely eliminates the distorting influences of the supply
resistance and guarantees minimal measuring uncertainty.
TR 100: Wiring depending on sheath diameter
TR 100: wiring
Figure 4-1: Double (top row) and single version (bottom row). From left to right: 2, 3 and 4-wire connection.
1 white
2 red
Diameter [mm] / [inches] single Pt100 Double Pt100
3 / 0.12 2-, 3- or 4-wire connection 2-wire connection
6 / 0.24 2-, 3- or 4-wire connection 2-, 3- or 4-wire connection
.book Page 16 Thursday, October 8, 2009 10:26 AM