Store/Recall; Reference; Contrast; Rpm Settings - Hameg HM8123 Handbuch

>

CALIBRATE

M e n u
MENUS:
> STORE / RECALL
MENUS: CALIBRATE

REFERENCE

BEEPER

CONTRAST

5.1

Store/Recall

>

ABOUT

MENUS:

RPM SETTINGS

This function allows storing or recalling of an instrument

DISPLAY

configuration. The HM8123 is able to store 10 configurations > CALIBRATE
Beeper: > ON
(0 to 9). Use the keyboard 0 – 9
MENUS: CALIBRATE
configuration stored in memory 0 will be recalled automatically.
OFF
BEEPER
> ABOUT
5.2 Reference
>
Beeper: ON
OFF
Calibrate: > Frequency
In this submenu the internal or an external reference may be
selected. If an external reference was chosen the HM8123 will
Level A
Calibrate: > Frequency
check the signal at the BNC connector 10 MHz
Level B
Level A
quency is not accurate enough or if there is no signal, in both
Level B
cases the error message „External Reference Test failed" will
be displayed. In this case the instrument will continue to use
its own reference. The error message will also be shown and
RECALL:
return to the internal standard performed if an external refe-
rence frequency deviates more than 2 Hz.
RECALL:
TOGGLE FREQUENCY REFERENCE
REFERENCE : INTERNAL
TOGGLE FREQUENCY REFERENCE
TOGGLE FREQUENCY REFERENCE
5.3 Contrast
REFERENCE : EXTERNAL
REFERENCE : INTERNAL
In this submenu the contrast of the LCD display may be set using
Adjust LCD Contrast
the arrow keys  or the knob
------------- * --------------
is confirmed by pressing pushbutton ENTER
be stored in a non-volatile memory. If the menu is left without
TOGGLE FREQUENCY REFERENCE
confirmation the setting of the contrast with ENTER
REFERENCE : EXTERNAL
setting will be lost afetr power-off. After turn-on the HM8123
will recall the value stored in the non-volatile memory.
Adjust LCD Contrast
------------- * --------------
5.4 RPM settings
This menu item allows to select the number of pulses per
revolution. This parameter is required for rpm measurements
and may be selected from 1 to 65,535 using the knob
4 arrow keys    .
RPM : Pulses Per Revolution
500
5.5 Display
RPM : Pulses Per Revolution TOGGLE DISPLAY ON/OFF
500
In this submenu the display may be turned off or on.
Display is : ON
TOGGLE DISPLAY ON/OFF
Display is : ON
TOGGLE DISPLAY ON/OFF
TOGGLE DISPLAY ON/OFF
Display is : OFF
5.6 Calibrate
Display is : OFF
It is possible to recalibrate the reference frequency (Frequency)
Reset instrument in factory settings ?
and the trigger levels of channels A (LEVEL A) and B (LEVEL
Calibration data not modified
Reset instrument in factory settings ?
Calibration data not modified
26
Subject to change without notice
HAMEG Instruments HM8123 Universal Counter
Software version ......
Calibrated on : ......
MENUS:
> STORE / RECALL
REFERENCE
CONTRAST
MENUS: RPM SETTINGS
DISPLAY
> CALIBRATE
CALIBRATE
MENUS:
BEEPER
> ABOUT
to select. After turn-on the
Beeper: > ON
OFF
Calibrate: > Frequency
Level A
Level B
. If this fre-
RECALL:
TOGGLE FREQUENCY REFERENCE
REFERENCE : INTERNAL
TOGGLE FREQUENCY REFERENCE
REFERENCE : EXTERNAL
 
Adjust LCD Contrast
------------- * --------------
. If the contrast adjusted
this setting will
, this
or the
RPM : Pulses Per Revolution
500
TOGGLE DISPLAY ON/OFF
Display is : ON
TOGGLE DISPLAY ON/OFF
Display is : OFF
 
Reset instrument in factory settings ?
Calibration data not modified
HAMEG Instruments HM8123 Universal Counter
Software version ......
Calibrated on : ......
Level A : +0.500 V
10.0000000 MHz
RPM : Pulses Per Revolution
500
B). For this porpuse the calibration procedure can be ordered
at Hameg Instruments GmbH (Phone: +49 6182 - 800 500 or
E-Mail: service@hameg.de – serial number required).
We recommend that recalibrations should only
TOGGLE DISPLAY ON/OFF
be performed by Hameg Instruments GmbH or an
Display is : ON
authorized calibration lab. After receiving the cali-
bration procedure the warranty with respect to the
specifications will be voided.
5.7 Beeper
TOGGLE DISPLAY ON/OFF
Display is : OFF
In this submenu the beeper can be activated/deactivated. If the
instrument configuration is stored using the Store function (see
chapter Store/Recall), the setting of the beeper is also stored.
Reset instrument in factory settings ?
5.8 About
Calibration data not modified
After selection of this submenu the type of instrument and the
software version will be displayed.
HAMEG Instruments HM8123 Universal Counter
Software version ......
Calibrated on : ......
Level A : +0.500 V
10.0000000 MHz

6 Additional inputs and outputs

6.1

External Arming

Gate Time : 500 ms
10.0000000 MHz
External arming prevents triggering of a measurement by
undesired signals. The ARMED mode is selected by pressing
ARMED , the pushbutton will light up. A measurement can
be started either manually by pressing TRIG
at the TRIG/ARM input .
The TRIG/ARM input connector
As long as there is a low level input signal the counter will not
start a new measurement. A measurement will be started if
the following conditions are all met: the signal at the input
switches from low to high, the trigger conditions selected are
fulfilled. The delay time caused by the arming signal is 50 ns.
The measurement will be performed according to the HM8123
settings. During a measurement any signals at the TRIG/ARM
input will be ignored. A new measurement will be started
after the measurement time set has elapsed with the next
positive slope at the TRIG/ARM input
Arming
Signal
Input A
Number of
periods counted
Ref: INT
Ref: INT
or by a signal
is located on the front panel.
.
Measurement time