Bedienungsanleitung Gossen Metrawatt METRA HIT H-E CAR (Seite 8 von 28) (Englisch)

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8 GMC-I Messtechnik GmbH

5 Measured Value Storage

The METRA HIT27 provides two entirely different options for

storing data:

• Measured Value Memory – DATA Key Function:

Each time a measuring point is contacted, a measured

value is stored in accordance with a defined condition

(see chapter 5.1).

• Memory Mode Operation – STORE Menu Function:

After activating the STORE menu function, all measured

values are saved in accordance with the selected

sampling rate. Memory mode operation is ended

manually using the same menu function, see

chapter 12.2.

In both cases, saved measured values can be read out with

the help of METRAwin10 PC software (as of version 5.22).

However, read-out is only possible if a BD232 IR adapter has

been plugged into the METRA HIT27 and connected to the

PC with an interface cable.

5.1 Measured Value Storage – Key Function “DATA”

(Hold/Compare)

Measured values can be automatically “frozen” with the DATA

hold function. This is useful when, for example, contacting

the measuring points with the test probes requires your full

attention.

Memory should be cleared before starting a measurement

series with the DATA key function.

This assures, on the one hand, that adequate memory

capacity is available and, on the other hand, that only data

from the last measurement series are read out in a contigu-

ous fashion. Check current memory occupancy to this end:

INFO MEMO/OCCUP

Clear memory if required: MEMO CLEAr.

After the measured value has been applied and the

corresponding “condition” from the table below has been

fulfilled, the measured value appears at the left-hand auxiliary

display and 2 acoustic signals are generated. At the same

time, “MAN” appears, indicating that the measuring range is

now fixed. The test probes can now be removed from the

measuring points, and the measured value can be read from

the auxiliary display. If the measured value is less than the

value specified in the table, the instrument is reactivated for

storage of the next value and “data” blinks at the display. The

measured value is saved to non-volatile memory, which is

acknowledged by an acoustic signal in each case.

Comparison of measurement values (DATA Compare)

If the newly stored measurement value deviates less than

0.33% of the measuring range from the first measurement

value, the acoustic signal (DATA Compare) sounds twice.

If it deviates more than 0.33% from the measuring range,

only a brief signal sonds.

Reactivation results from falling short of specified measured value limits.

When a measurement value is stored for the first time as a reference value, the

acoustic signal sounds twice.

For subsequent data hold, two acoustic signals are only generated if the

currently frozen value deviates from the fist saved value by less than 0.33% of

the measuring range, depending upon resolution.

Key

R = measuring range, MV = measured value

As long as the DATA function is active, the measuring ranges

should not be changed manually.

The DATA function is deactivated if the DATA| CLEAR key is

pressed and held (approx. 1 s), by turning the rotary switch or

by switching the instrument off and back on again.

Function

DATA



DATA

Condition Response at Instrument

Measuring

Function

Measurement

Value

Sub-Display

Acoustic

Signal

Meas.

Value

DATA

Switch on brief

displayed

brief

Store

(stabilized mea-

surement value)

V, Hz > 10% of MR

displayed

brief

,

0 L

Reactivate

V, Hz < 10 % of MR stored

meas.

value

blinks

,

0 L

Switch to

function

MIN/MAX

brief see Table chapter 6

Quit long

deleted

Acoustic Signal

30.000

20.000 data

30.000

MIN MAX

20.000 30.000

DATA

MAN

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