KROHNE MFC 300 EN - Manual (Page 129)

SERVICE
7
129
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
7.2.5 OPTIMASS 8000k
The specified values are for guidance only.
• Driver = black and grey
• Sensor A = white and yellow
• Sensor B = violet and green
• Pt500 = red and violet (530…550 Ω) at ambient temperature
• Resistance values outside of the ranges specified above may indicate a circuit error. The
device may be in "start-up" mode or indicate measuring errors.
• All circuits should be isolated with respect to earth (device housing) and each other >20 MΩ.
• An exciter/sensor coil short circuit may cause the meter to be in "start-up" mode.
Size Resistance (Ohm)
Driver Sensor A/B
15 65 123
25 117 110
40 80 110
80 80 140
100 120 110
INFORMATION!
Failure of two or more of the upper circuits may indicate a measuring tube error. There may be
product in the housing. If this is the case, depressurise
depressurise depressurise depressurise the process line and immediately remove
the measuring device from the process line.
.book Page 129 Monday, February 6, 2012 11:01 AM