Sound-devices 552 User Manual download pdf (Page 37)

552 User Guide and Technical Information

1. Press and hold the Battery Check button.

2. Slide the RTN A/B switch.

Powering

The 552 is powered by either internal batteries or external DC sources. The power switch selects the

power source, either internal or external. There is a large enough power reserve to switch back and

forth from one source to the other without interrupting mixer operation.

The 552 is a power-efﬁcient device and can run from four-AA alkaline batteries for approximately

eight hours (without phantom). As additional load is placed on the mixer, battery runtime is re-

duced. See Power Consumption for details.

Internal Battery Powering

Internal batteries can be used as either a primary power source or as a back-up in the event that

external power is removed or depleted. The 552 uses four AA-sized (LR6) batteries of various types.

Lithium primary cells, Alkaline, and NiMH rechargeable AA battery types are all popular battery

chemistries. The 552 achieves the longest battery runtime with Lithium and NiMH batteries.

There are similar sized 3+ V Lithium cells on the market which are not compatible with 552.

If the internal batteries drop to extremely low voltage levels while recording, the recorder will au-

tomatically close the ﬁle that it is recording to prevent it from being lost. The recorder is locked out

until the power source is switched to external or the 552 is powered down and batteries are changed.

External Powering

The 552 can be powered from any DC voltage from 10 to 18 VDC. Pin-4 of the locking, Hirose con-

nector is positive (+) and pin-1 is negative (–). The external DC supply is fully isolated (ﬂoating)

from the rest of the mixer for easy and safe interconnection with other external audio gear.

Voltage Metering

Press and release the Battery Check button to display the voltage levels of the internal batteries and

external power sources. The Left meter shows the internal battery voltage level; the right meter

shows the external voltage level. Because many different power sources can be used for external

powering, the external DC metering is customizable for different power sources in the Setup Menu.

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 59 60

No comments

Sound-devices 552 User Manual Page 37