PEWA BENNING MM 8 Instrucciones De Servicio página 15

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 D igital­display, for the measuring value and indication of overranging,
 T he­polarity­indication,
 B attery­indication, appears when the battery is discharged,
 M IN/MAX­button, storing the highest and lowest measured value
 R S-232­button, activation of the optical IR-RS-232 interface for transmitting
the measured values (­BENNING MM 10),
 R ANGE­button, switchover automatic/ manual measuring range,
 H OLD­button, storing the indicated measured value,
 B utton­(yellow), display lighting (­BENNING MM 10),
 R otary­switch, for selecting the measuring function,
 Jack (­positive
 C OM­ jack­ for current, voltage, resistance, frequency, capacity measure-
ments, continuity and diode testing,
 J ack­(­positive
 R ubber­protection­frame
 O ptical­IR-RS-232­interface, for accommodating the IR adapter located on
the RS-232 cable (­BENNING MM 10),
) This is what the automatic polarity indication for direct current and voltage refers to.
1
5.­ General­information
5.­ General­details­on­the­multimeter
5.1.1
T he digital display  for the test voltage is a 4-digit liquid crystal display
with 16 mm high numerals. The largest numerical value which can be
displayed is 6000.
5.1.2
T he polarity indication  is automatic. Only one polarity with respect to
the socket marked "-" is indicated.
5.1.3
T he overranging is indicated by "OL" or "-OL" and, in part, an acoustic
warning.
W arning, no indication and prior warning in the event of an overload
condition!
5.1.4
T he MIN/MAX button function  inputs and stores automatically the
highest and lowest measured value. The following values are indicated
by button operation:
" MAX" indicates the stored maximum value, and "MIN" indicates the
lowest value. The continuous detection of the MAX-/ MIN value can
be stopped or started by pressing the button "HOLD" . Pressing the
button "MIN/MAX" for an extended period of time (­2 seconds) switches
back into normal mode.
5.1.5
T he RS-232 button  activates the optical infrared interface for trans-
mitting the measured values from the BENNING MM 10 to a PC/ lap-
top. The PC/ laptop is galvanically separated from the measuring signal
by means of the optical infrared interface. The activation is effected with
the simultaneous display of "RS232" in the display unit.
5.1.6
T he button "RANGE"  is used to index the manual measuring ranges
whilst simultaneously fading out "AUTO" in the display. Press the but-
ton for an extended period (­2 seconds) to select the automatic range
selection (­indication "AUTO"):
5.1.7
M easured value storage "HOLD": Press the button "HOLD"  to store
the measured result. At the same time, the display shows the symbol
"HOLD. A renewed press of the button switches back into measuring
mode.
5.1.8
B utton (­yellow)  switches on the display illumination. Press button
again to switch off.
5.1.9
T he measuring rate of the BENNING MM 8/ 9/ 10 amounts nominally to
1.5 measurements per second for the digital display.
5.1.10 T he BENNING MM 8/ 9/ 10 is switched on or off by the rotary switch .
Shutdown position "OFF".
5.1.11 T he BENNING MM 8/ 9/ 10 switches off automatically after approx. 10
minutes (­APO, Auto Power Off). It switches back on again if a button
or the rotary switch is operated. A buzzer sound signals the automatic
shutdown of the unit. The shutdown is not active, if the RS-232 button
is first operated.
5.1.12 T emperature coefficient of the measured value: 0.15 x (­stated measur-
ing precision)/ °C < 18 °C or > 28 °C, related to the value for the refer-
ence temperature of 23 °C.
5.1.13 T he BENNING MM 8 is supplied by two 1.5 V micro batteries
(­IEC 6 LR 03).
T he BENNING MM 9/ 10 is supplied by a fitted 9 V block battery
(­IEC 6 LR 61).
5.1.14 I f the battery voltage drops below the specified operating voltage of the
B ENNING MM 8/ 9/ 10, then a battery symbol  appears in the display .
5.1.15 T he life span of a battery amounts to approx. 300 hours (­alkali bat-
tery).
11/ 2006
1
), for V, Ω, µA,
1
), for A range, for currents up to 10 A (­BENNING MM 9/ 10),
­ B ENNING­MM­8/­9/­10­
, Hz
3

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