TB 9-6625-174-24
APPENDIX B
PERFORMANCE TABLES
Yokogawa, Model 300-20
Table B-6. Calibration Description.
Test instrument parameters
Performance specifications
DC CURRENT
Range: 0 to 300 A dc
Accuracy: 30 A range: (1.0% rdg + 5 dgts); 300 A range: (1.5% rdg + 3 dgts)
30 A to 200 A, (1.5% rdg + 3 dgts) 200 A to 300 A
PEAK HOLD
Range: 0 to 300 A dc
Accuracy: 300 A range only: (3.0% rdg + 15 dgts) 0 to 30 A, (3.5% rdg + 13
dgts) 30 A to 200 A, (4.5% + 13 dgts) 200 A to 300 A
AC CURRENT
Range: 0 to 300 A ac
Accuracy: 30 A range: 50/60 Hz, (1.0% rdg + 5 dgts); 20 Hz to 50 Hz and 60
Hz to 1 kHz, (2.0% rdg + 5 dgts);
300 A range: 50/60 Hz, (1.5% rdg + 5 dgts) for 30 to 200 A, (2.5%
rdg + 5 dgts) for 200 to 300 A; 20 Hz to 50 Hz and 60 Hz to 1 kHz,
(2.0% rdg + 5 dgts) for 30 to 200 A, (3.5% rdg + 5 dgts) for
200 to 300 A
Table B-7. DC Current (≤500 A) (w/50-Turn Coil).
Calibrator output
Test instrument
Applied
Range
Limits (A dc)
(A dc)
(A dc)
Min
Max
0.54
30
26.68
27.32
-0.54
30
-27.32
-26.68
1.8
300
88.3
91.7
1, 2
1.8
300
85.5
94.5
4.2
300
204.4
215.6
5.4
300
262.9
277.1
Press TI MODE switch twice for Peak-Hold mode. Verify P●H appears on display.
1
Set calibrator to STBY before verifying limits. Press TI MODE switch for DC Current mode after verifying limits.
2
Table B-8. AC Current (≤500 A) (w/50-Turn Coil).
Calibrator output
Test instrument
Applied
Range
Limits (A ac)
(A ac)
(A ac)
Min
Max
0.22 @ 20 Hz
30
10.73
11.27
0.54 @ 60 Hz
30
26.68
27.32
0.54 @ 1 kHz
30
26.41
27.59
3.6 @ 40 Hz
300
175.9
184.1
3.6 @ 60 Hz
300
176.8
183.2
3.6 @ 1 kHz
300
175.9
184.1
5.4 @ 40 Hz
300
260.0
280.0
5.4 @ 60 Hz
300
262.7
277.3
5.4 @ 1 kHz
300
260.0
280.0
B-2
