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Reference Manual MAS2600: Maintenance and Troubleshooting
Ed 21 December 2014
46
MAS2600 Test Sheet
Name AT T.
Emerson Process Management
Marine Tank Management
Damcos A/S, Service Department
FAX.: +45 5578 7272
Ship name Yard NB no.
MAS2600 Transducer serial no. MAS2600 Amplifier serial no.
Tank name
Liquid in tank HFO DO Ballast Other
The tank is Full Empty Other
Step Result Unit Limits
1 Measure voltage between terminal 5 and 6. V DC Voltage should be in the range 17 to 22 V DC.
Check power supply.
2 Measure nipple voltage between terminal 5
and 6.
V AC Voltage must not exceed 2 V AC.
Check power supply.
3 Measure sensor excitation voltage between
terminal 7 and 10.
V DC Voltage should be in the range 3.0 and 6.2 V
DC.
4 Measure sensor excitation voltage between
terminal 8 and 9.
mV DC Voltage should be in the range -15 to 100 mV
DC.
5 Measure current in supply lead to terminal
5.
mA DC Current should be in the range 4 to 20 mA
and the same value as measured in point 6. if
not the amplifier may be defect.
6 Measure current in supply lead to terminal
6.
mA DC Current should be in the range 4 to 20 mA
and the same value as measured in point 5. if
not the amplifier may be defect.
7 Measure sensor resistance with sensor
cable unconnected between:
If the measured resistance is less than 1 M
Ohm the sensor is considered defect.
Terminal 7 to cable shield. M Ohm
Terminal 8 to cable shield. M Ohm
Terminal 9 to cable shield. M Ohm
Terminal 10 to cable shield. M Ohm
8 Measure sensor bridge resistance with sen-
sor cable unconnected between:
If the measured resistance is less than 1 K
Ohm or greater than 50 K Ohm the sensor is
considered defect.Terminal 7 to terminal 8. K Ohm
Terminal 7 to terminal 9. K Ohm
Terminal 7 to terminal 10. K Ohm
Terminal 8 to terminal 9. K Ohm
Terminal 8 to terminal 10. K Ohm
Terminal 9 to terminal 10. K Ohm
9 Visual inspect the transmitter for:
- Damages on the cable
- Sharp bends on the cable
- Moisture/liquids in the breather tube
- Damages on the diaphragm
10 Comments