OMICRON 303
Technical data
CAT II is required when measuring within electrical devices or between mains supply and devices.
CAT III is required when measuring in electrical installations such as control cubicles that are still
connected to the station battery or mains. The electrical installations are protected by a fuse.
Table 21-4: Internal measurement of outputs A (CAT III / 300 V)
1
1. For limited specifications, see Table 21-19: "Climate" on page 310.
Range name Range value Accuracy
2
2. Means “typical accuracy”; 98% of all units have an accuracy which is better than specified.
300 V 0…300 V
DC: 0.1% rd + 0.05% fs
AC: 0.03% rd + 0.01% fs
Table 21-5: Internal measurement of outputs B (CAT III / 300 V)
1
1. For limited specifications, see Table 21-19: "Climate" on page 310.
Range name Range value Accuracy
2
2. Means “typical accuracy”; 98% of all units have an accuracy which is better than specified.
300 V 0…300 V
DC: 0.1% rd + 0.05% fs
AC: 0.03% rd + 0.01% fs
3 V 0…3 V DC: 0.1% rd + 0.05% fs
300 mV 0…300 mV DC: 0.1% rd + 0.1% fs
30 mV 0…30 mV DC: 0.1% rd + 0.1% fs
Table 21-6: Internal measurement of outputs
Range name Range value Accuracy
1
1. Means “typical accuracy”; 98% of all units have an accuracy which is better than specified.
55 A 0…55 A DC: 0.1% rd + 0.2% fs
40 A 0…40 A AC: 0.1% rd + 0.1% fs
Table 21-7: Resistance measurement
Range name Range value Meas. current Accuracy
1
1. Means “typical accuracy”; 98% of all units have an accuracy which is better than specified.
30 mV 0.1 μΩ…300 μΩ 100 A 0.2% rd + 0.1 μΩ
300 mV 0.5 μΩ…3000 μΩ 100 A 0.2% rd + 0.5 μΩ
3V 5μΩ…30 mΩ 100 A 0.2% rd + 5 μΩ
3V 50μΩ…300 mΩ 10 A 0.2% rd + 50 μΩ
Table 21-8: Timing accuracy
Characteristic Rating
Timing accuracy ±1 sample interval ±0.01% rd