14
AC Current Probe Model MA114
3.5. TYPICAL FREQUENCY RESPONSE GRAPHS
In the 3A, 30A, and 300A ranges, with a frequency
≤
20 kHz, there is no
frequency derating.
3.6. POWER SUPPLY
3.6.1. BATTERIES
The MA114 is powered by two 1.5 V alkaline batteries (type AA or LR6). The
nominal operating voltage is between 1.8 and 3.2 V.
The mean battery life is:
300 hours in continuous operation
1,800 10
‑
minute measurements
When the MA114 is not connected to line power and the green On indicator goes
off, the batteries must be replaced (see § 4.2).
3.6.2. EXTERNAL POWER (OPTIONAL)
The MA114 can be powered by a standard line adapter (5 V
DC
, 100 mA) with a
type B micro
‑
USB connector.
When the adapter is connected and the switch is set to OFF, the On indicator is
lit steadily.
When the MA114 is ON, the brightness of the On indicator varies to indicate that
the batteries are functional. If the indicator remains on steadily, the batteries
must be replaced.
