HH972 Operating Manual p 4/12
3. Pocket Scope overview
-A- General
The HH972 combines a digital oscilloscope with a multimeter. It offers the advanced features
of an auto-set digital oscilloscope and a component curve tracer, in the size and for the price of
a hand-held multimeter (3.6” x 7.1” x 1.4” (180 x 90 x 35 mm) / 12.7 oz (360g) with
battery). It is equipped with a high contrast backlit LCD display with a wide-angle visibility
(150(H) x 100(V) dots).
It has been designed to satisfy a wide range of requirements, from experts to novices, in
homes, offices, laboratories, and in the field:
§Scope mode to observe voltage waveform from an active electric / electronic source.
§Meter mode to check a possibly damaged discrete or in-circuit component. It can also help
test resistors or trace open/shorts in failing systems.
§280V true RMS AC / + or – 400V DC maximum input voltage.
§5MHz bandwidth (Digital sampling @20Ms/sec).
§Full auto setup / auto adjust / auto display of amplitude and time.
§Easy access to functions with front keys. HOLD key to freeze the display.
§3-hour continuous operations with a 9V battery or 10-hours with the optional ST972 stand
including a rechargeable battery.
§Test leads included (test probe not required).
Because of its low cost, small size and technical performances, the HH972 is well suited for
educational purposes. Applications cover digital and analog signals, telecommunication, GPS,
TV and audio, line-operated equipment, sensors, signal analysis in automotive (with optional
ST972-EC), car stereo etc. It is especially convenient for technicians installing and
maintaining equipment, working by themselves far from their factory, far from power sources.
-B- Front side
Feature Function
POWER Press ON or OFF to get scope powered or turned off.
AUTO Auto ranging to get best fit in the display
Use to manually change settings.
SELECT 1- Swapping synchro from (+) slope to (-) slope
2- Selection of cursor #1 or #2
HOLD Press once to freeze the display for observation.
Press again to return to RUN mode
When depressed for > than 2s, display light gets turned on
When depressed again for > than 2s, light gets turned off.
MENU Access to menu to change default settings
Use to change settings.
MODE 1- CURSOR to display amplitude and time
2- SCALE mode to adjust scale factors
3- OFFSET mode to change DC offset settings.
A-K
terminals METER mode for continuity testing.
COM-V
terminals OSCILLOSCOPE mode.
