TB 9-6625-2020-24
Table 1. Calibration Description - Continued
Test instrument
Performance specifications
parameters
Type DM 502
Ac decibels
Range: -40 to +40 dB in 4 ranges
0.5 dB from 0 to +20 dB from 20 Hz to 20 kHz
Accuracy:
0.5 dB from 0 to -10 dB from 20 Hz to 2 kHz
1.0 dB from 0 to -10 dB from 2 to 20 kHz
0.5 dB from -10 to -20 dB from 20 Hz to 2 kHz
1.0 dB from -10 to -20 dB from 2 to 7.5 kHz
2.0 dB from -10 to -20 dB from 7.5 to 20 kHz
Ohms
Range: 0 to 20 M in 6 ranges
Accuracy: 200 range; (0.5% 1 count) +0.1
2, 20, 200 k , and 2 M range; 0.5%,
1 count
20 M range; 1%, 1 count
Dc current
Range: 0 to 2000 mA in 5 ranges
Accuracy:
0.2% of reading, 1 count
Ac current1
Range: 0 to 2000 mA in 5 ranges
Accuracy:
0.6% of reading, 1 count
Type DM 502A
Dc volts
Range: 0 to 1000 V in 5 ranges
Accuracy: 200 mV, 2, 20, and 200 V range: (0.1% of reading +0.05% of FS)
1000 V range: (0.1% of reading +0.1% of FS)
Ac volts
Range: 0 to 500 V in 5 ranges
Accuracy: 200 mV, 2, 20, and 200 V range:
20 to 40 Hz, (1.5% of reading +0.3% of FS)
40 Hz to 20 kHz, (0.6% of reading 0.3% of FS)
500 V range:
20 to 40 Hz, (1.5% of reading +1.2% of FS)
40 Hz to 20 kHz, (0.6% of reading +1.2% of FS)
True rms decibels
Range: -10 dB to +50 dB in 4 ranges with measurement capability to -60 dB
Accuracy: 0.5 dB from +50 dB to -50 dB from 20 Hz to 20 kHz
0.5 dB from -50 dB to -60 dB from 20 Hz to 2 kHz
1.5 dB from -50 dB to -60 dB from 2 kHz to 10 kHz
Ohms
Range: 0 to 20 M in 6 ranges
Accuracy: 200 , 2 k , 20k , 200 k , and 2000 k range:
(0.5% of reading +0.05% of FS +0.2 )
20 M range: (1% of reading +0.05% of FS)
Dc current
Range: 0 to 2000 mA in ranges
Accuracy:
(0.2% of reading, +0.05% of FS)
Ac current1
Range: 0 to 2000 mA in 5 ranges
Frequency: 40 Hz to 10 kHz
Accuracy: (0.6% of reading +0.3% of FS)
1Ac
current verified during dc current check since same shunt resistors are utilized for both checks.
3