KROHNE OPTIMASS with MFC 300 EN - Manual (Page 134)

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• The above data are provided as a rough guide only.
• Driver = White / Brown
• Sensor A = Orange / Black. Sensor B = Grey / Blue
• RTD = Red / Purple (108 at 20°C if PT100, 540 at 20°C if PT500). Compensation leg =
Purple / Yellow
• Resistance values outside these values could indicate a circuit failure. Meter may be in
start-up or have measuring errors.
• All circuit should be isolated from ground (meter case) and each other:
>
20M at 20°C. If
circuits are shorting to ground, the meter may be in start-up.
Caution:
If the measuring tube/s fail, process fluid can leak into the outer casing. If this happens,
depressurise the meter and remove it from the process line as soon as it safe to do so.
• The above data are provided as a rough guide only.
• Driver = Black and Grey.
• Sensor A = White and Yellow. Sensor B = Green and Purple.
• RTD = Red and Blue (530...550 ) at ambient temperature
• Measuring Tube Strain Gauge = 420...560
• Resistance values outside these values could indicate a circuit failure. Meter may be in
start-up or have measuring errors.
• All circuit should be isolated from ground (meter case) and each other: >20M . If circuits
are shorting to ground, meter may be in start-up.
Caution:
If the measuring tube/s fail, process fluid can leak into the outer casing. If this happens,
depressurise the meter and remove it from the process line as soon as it safe to do so.
OPTIMASS 1000
Resistance (Ohm)
Driver Sensor A/B
Size 15 240 78
Size 25 240 64
Size 40 168 78
Size 50 168 64
Size 15 – Ex 240 78
Size 25 – Ex 240 64
Size 40 – Ex 91 78
Size 50 – Ex 91 64
OPTIMASS
Inductance (mH) Resistance (Ohm)
Driver Sensor A/B Driver Sensor A/B
8000 2.2 0.735 38 12.5
9000 2.6 0.95 67 25