Instruction manual

Memory Functions

The NA-27 incorporates a memory that allows manual and automatic storing of measure-

ment data ("mass memory") and a separate memory for measurement parameter settings

("condition memory"). Stored measurement results can be displayed by pressing the RE-

CALL key. To protect stored data, the mass memory can be set to read-only.

To use the memory, the backup battery must be inserted (see page 16).

MANU (manual store)

Measured instantaneous value data and processing results can be stored manually by

the operator. When the STORE key is pressed, measurement data, all processing re-

sults, measurement parameter settings, and measurement date and time are stored in

the currently selected address.

Up to 200 data sets can be stored in this way.

Note

If after completion of a measurement the measurement pa-

rameters (such as frequency weighting, time constant, level

up/down) are changed before pressing the STORE key,

there will be a mismatch between stored data and stored

measurement parameter settings.

AUTO (automatic store)

There are two identical memory blocks (AUTO1, AUTO2) for automatic storing of

data.

It is possible to automatically store either only the currently displayed measurement

result (single store) or to simultaneously store all processing results (group store), ei-

ther at specified store time intervals or at the measurement time intervals.

Single store

10000 data/block: (sound pressure level mode)

4000 data/block: (1/1-octave analysis mode)

2000 data/block: (1/3-octave analysis mode)

store interval: 1 to 990 ms in 1 ms steps