14
Current Measurement
Typical Measurements and Accuracy (cont’d)
µA
Flame Sensor
Control
Board
Pilot Flame
AmpTip™ Function
µA DC Current
μDC Current (CMH-600 and CMI-600 only)
Range Accuracy Burden Voltage
200.0 μA ± (1.0% + 0.5 μA)
3.5 mV/μA
2000 μA ± (1.0% + 5 μA)
A
Hz
AmpTip™ AC Current
Range Accuracy Range
Accuracy at
50 Hz to 60 Hz**
60.00 A
< 0.20 A* unspecified
0.00 A to 3.99 A ± (1.5% + 0.15 A)
4.00 A to 60.00 A ± (1.5% + 0.05 A)
* For CM-660, CM-860, and CMH-600 only.
** For CM-960 and CMI-600 only, induced error for
adjacent current carrying conductors is < 0.01 A/A.
AmpTip™ DC Current (CM-960 and CMI-600 only)
Range Accuracy Range Accuracy†
60.00 A
0.00 A to 3.99 A ± (2.0% + 0.15 A)
4.00 A to 60.00 A ± (2.0% + 0.05 A)
AmpTip™ DC + AC Current
(CM-960 and CMI-600 only)
Range
Accuracy
Range
Accuracy at DC,
50 Hz to 60 Hz†
60.00 A
0.00 A to 3.99 A ± (2.0% + 0.17 A)
4.00 A to 60.00 A ± (2.0% + 0.07 A)
† Induced error for adjacent current carrying conductors is < 0.01 A/A.
Note: Use Δ if there is an offset before the measurement is taken.
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