KROHNE MFC 300 EN - Manual (Page 127)

SERVICE
7
127
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
7.2.3 OPTIMASS 3000
The specified values are for guidance only.
Damaged magnetic coil: inductance values in parentheses.
• Driver = black/violet and grey/orange
• Sensor A = white and yellow
• Sensor B = green and yellow
• Pt500 = red and blue (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 Inductance (mH) Resistance (Ohm)
Driver Sensor A/B Driver Sensor A/B
01 1.2 (0.6) 7.4 57 107
03 / 04 2.4 (1.2) 10.1 47 135
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 127 Monday, February 6, 2012 11:01 AM