Velleman Personal Scope HPS5 User manual

2
PersonalScopeTM
Velleman
Legen Heirweg 33
9890 Gavere
Belgium
Internet Site: http://www.velleman.be
E-mail: [email protected]
HHPS5 - 1999 - ED1

3
PersonalScopeTM
CONTENTS
FCC information for the USA ............................... 4
Important............................................................... 5
GENERAL............................................................. 6
Features................................................................. 5
Options.................................................................. 5
Technical specifications......................................... 6
SAFETY and WARNINGS.................................... 7
Symbols displayed on the unit................................ 7
USE......................................................................... 8
Survey of the connections and controls .................. 8
Power supply ......................................................... 9
Survey of the indications on the screen .................10
OPERATION........................................................11
Turning on/off the Personal Scope........................11
Resetting the Personal Scope.................................11
Adjusting the contrast...........................................11
Choice of input.....................................................11
Switching from one readout to another..................12
Measuring probe adjustment.................................13
Auto-setup function ..............................................13
Signal screen ........................................................14
Screen memory.....................................................15
Set-up function keys..............................................15
The markers .........................................................15
Setting up the voltage per division.......................16
Setting up the time base........................................15
Moving the signal in Y-position............................16
Trigger functions..................................................17
Setting up a X10 measuring probe ........................18
MAINTENANCE..................................................18
TROUBLESHOOTING .......................................19
The screen remains blank or there is no signal......19
RMS readout is incorrect ......................................19
No signal on the oscilloscope display....................19
Incorrect frequency readout...................................19
Voltage readout is not correct ...............................19
WARRANTY........................................................19
DIAGRAM............................................................20
CONTENTS

4
PersonalScopeTM
FCC information for the USA
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a res-
idential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harm-
ful interference to radio communications. However, there
is no guarantee that interference will not occur in a partic-
ular installation. If this equipment does cause harmful in-
terference to radio or television reception, which can be
determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and re-
ceiver.
• Connect the equipment into an outlet on a circuit dif-
ferent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV techni-
cian for help.
Important
This equipment was tested for FCC compliance under con-
ditions that include the use of shielded test leads between
it and the peripherals. It is important that you use shielded
cables and connectors to reduce the possibility of causing
Radio and Television interference. Shielded probes, suit-
able for the HPS5 oscilloscope can be obtained from
the authorized Velleman dealer.
If the user modifies the HPS5 oscilloscope or its connec-
tions in any way, and these modifications are not approved
by Velleman, the FCC may withdraw the user’s right to
operate the equipment.
The following booklet prepared by the Federal Communi-
cations Commission may be of help: “How to identify and
Resolve Radio-TV Interference problems”. This booklet is
available from the US Government Printing Office, Wash-
ington, DC20402 Stock No. 044-000-00345-4.

5
PersonalScopeTM
GENERAL
The Velleman PersonalScope is not a graphical multimeter
but a complete portable oscilloscope at the size and the cost
of a good multimeter. Its high sensitivity - down to 5mV/
div - and extended scope functions make this unit ideal for
hobby, service, automotive and development purposes.
Because of its extreme value for money, the PersonalScope
is well-suited for educational use in schools and colleges.
Suitable for measurements on audio equipment, mains
voltage applications, digital signals, all kind of sensors,
signal analysis in automotive applications, car stereo etc…
It’s ultra fast full auto setup function takes care of all the
necessary settings and makes measuring waveforms very
easy, a feature that will be appreciated both by experts and
novices.
Features
• High contrast LCD with wide viewing angle
• Full auto set up for volt/div and time/div
• Trigger mode: run - normal - once - slope -/+
• True RMS and dB measurements
• Readout: Vdc-Vpp-Vrms-dBm
• x1 and x10 probe calculation option
• Display mode: none - markers - grid - crosshair
• Marker readout: dt - 1/dt (frequency) - dV
• AC/DC input coupling selection
• Automatic zero reference for DC measurements
• Sceen hold fuction
• Auto power off or continuous on
• Low battery detection
• Includes battery charge circuit
Options
• Insulated measurement probe x1 / x10: PROBE60S
• Soft carry case: CHPS5
• Adapter: type PS905 for 230V / PS905USA for 110V
GENERAL

6
PersonalScopeTM
Maximum sample rate 5MHz for repetitive signals (0.5MHz for single shot events)
Input amplifier bandwidth 1MHz ( -3dB at 1V/div setting)
Input impedance 1Mohm // 20pF (standard oscilloscope probe)
Maximum input voltage 100Vpeak (AC + DC)
Input coupling DC, AC and GND (GND for auto zero reference)
Vertical resolution 8 bit (6 bit on LCD)
Linearity ±1bit
LCD Graphics 64 x 128 pixels, 64 x 96 pixels for signal
dBm measurement (0 dB= 0.775V) From -73dB tot +40dB (up to 60dB with X10 probe) ±0.5dB accuracy
True-rms AC measurement From 0.1mV to 80V (up to 400Vrms with X10 probe) 2.5% accuracy
Peak peak and DC range 0.1mV to 180V (1mV to 600V met x10 probe) 2% accuracy
Timebase range 20s, 10s, 5s, 2s, 1s, 0.5s, 0.2s, 0.1s, 50ms, 20ms, 10ms, 5ms, 2ms, 1ms, 0.5ms,
0.2ms, 0.1ms, 50us, 20us, 10us, 4us, 2us / div.
Input sensitivity range (at x1) 5mV, 10mV, 20mV, 50mV, 0.1V, 0.2V, 0.4V, 1V, 2V, 4V, 8V, 20V /div.
Probe calibration output Approx. 1KHz / 5Vtt
Supply voltage 9VDC/ min 300mA adapter (unregulated) 12VDC if regulated
Batteries (option) Alkaline type AA or Ni Cd / NiMH rechargeable ( 5 pcs required)
Charge current for rechargeable batteries 90mA
Battery life Up to 20h with Alkaline batteries
Operating temperature 0 to 50°C (32 to 122°F)
Dimensions 105x220x35mm (4.13x7.95x1.38”)
Weight 395g (14oz.) ex. Batteries
Technical specifications
GENERAL

7
PersonalScopeTM
SAFETY and WARNINGS
Symbols displayed on the unit
Important safety information, see user manual.
Ground level
⇒ The PersonalScope is ideally suited for measurements of category II installations with pollution degree 1 and using a
maximum of 600V, in accordance with the IEC1010-1 norm. The enclosure is UL 94V0 listed
⇒ Consequently, all measurements should be avoided in case of polluted or very humid air. One should also refrain from
measuring conductors or installations that use voltages that exceed 600Vrms above ground level. CAT II indicates
conformity for measurements of domestic installations.
⇒ The maximum input voltage for the connections of the unit stands at 100Vp (AC+DC)
⇒ Do NOT open the enclosure while performing measurements.
⇒ Remove all test leads before opening the enclosure in order to avoid electrical shock.
⇒ Use a measuring probe with an insulated connector ( e.g. type PROBE60S) when measuring voltages exceeding 30V.
Remove all non-rechargeable batteries when connecting an AC/DC adapter !
!
!
SAFETY and WARNINGS

8
PersonalScopeTM
probe
test
x10
USE
Survey of the connections and controls
1 - BNC input connector (max. input 100Vp AC+DC)
2 - Adapter connection (observe the polarity!)
3 - Battery compartment
4 - X10 probe testing signal behind battery cover
5 - Serial number
6 - Display
7 - Battery charge indication LED
8 - Reset push button
9 - Keyboard
!
9V DC
I/O
12
HPS5
mark 1-2
trig
t-V/div
Y-pos
probe
x1/x10
Hold
Display
AC/DC
Auto
Reset
Charge
Slope
Trigger
mode
P E R S O N A L
S C O P E
Auto
AC/DC
Display
Hold
Reset
Charge
mark 1-2
trig
t-V/div
Y-pos
probe
x1/x1
Trigger
mode Slope
P E R S O N A L
S C O P E
HPS5
4
3
9
87
6
123456
5
USE

9
PersonalScopeTM
Power supply
The HPS5 PersonalScope can be powered by means of an
adapter, ordinary batteries or rechargeable ones.
Rechargeable batteries are advised for intensive use.
The greater the capacity of the rechargeable batteries, the
greater the autonomy of the unit.
Rechargeable batteries of the 500mA/h type will yield ap-
prox. 5 hours of autonomy, while 800mA/h-types provide
up to 8 hours of autonomy.
Attention:
⇒ Use a non-regulated adapter of 9VDC that supplies
a min. of 300mA. Observe the polarity and consult
your retailer if necessary.
⇒ When using a regulated adapter, the user should
verify whether it can supply 12VDC.
Batteries (option):
⇒ The unit can be used with either ordinary alkaline bat-
teries or rechargeable ones e.g. our HR6 type (5 x).
⇒ Open the battery cover by loosening the screw:
Insert the batteries in the holders. Mind the polarity !
probe
test
USE

10
PersonalScopeTM
Important:
Do NOT perform measurements unless the
battery compartment is closed. The battery
cover should only be removed for the calibration of the
probe 's X10-position.
F When first using the rechargeable batteries or if the
batteries are completely discharged, the user should
charge them for at least 12 hours before using the
unit.
F When the unit is OFF, the charging time for
800mA/h type batteries will be approx. 12 hours.
F The “Charge” indication LED on the front panel
will light up when the batteries are being charged.
ATTENTION: Remove all non-rechargeable batteries
when connecting the AC/DC adapter !
The message “Lo . bat” will flash in the bottom right cor-
ner of your display when the batteries need replacement
(or charging). Insufficient battery voltage may entail erro-
neous measuring
results.
Survey of the indications on the screen :
Dot indicates the vertical position of
the signal on the screen
Trigger opening indication (fixed
in the middle of the screen)
Signal window with (possibly) the
markers , cross or dot to indicate the
various divisions.
Time per division or time between markers
(when used)
Display of converted/calculated frequency
1/dt between markers (if present)
Trigger information or screen hold indica-
tion.
Input-coupling indication : ac/dc/gnd and
X10 probe setup
Measurement readouts, Vp (V peak-to-peak)
; Vr (Volt rms) ; dB (Decibels) ; V= (DC volt.)
Readout of the voltage between the mark-
ers (when present)
Selected voltage per division
Indication of the selected function (blue
keys) or battery-low indication
!
USE

11
PersonalScopeTM
OPERATION
Turning on/off the Personal Scope
Press the “ON/OFF” switch briefly to (de)activate
the unit. The screen will briefly display the logo above the
message “timer on”, which means that the unit will deacti-
vate after eight minutes if no other key has been pressed
during this interval.
In order to bypass automatic deactivation : Keep the
ON/OFF switch pressed down while activating the unit.
The screen will briefly display the message “timer off”.
F When the unit is deactivated, the last setup will be
saved as long as the power is not cut and as long as
the unit is not “reset” (see below).
Resetting the Personal Scope.
In case of unusual behaviour of the keypad or the display,
it is possible to reactivate the unit by using the "Reset"
function. The unit will subsequently return to the
manufacturer-programmed setup.
Press the sunk “Reset” push button for at
least 10 seconds.
F Do not use a sharp tool !
Adjusting the contrast
Press the “contrast” key until the desired contrast
is displayed.
The user can either keep the key pressed down or press it
repeatedly.
When pressing this key, the contrast will always increase to
maximum level before starting again at the lowest available
level and working its way up again
Choice of input
Depending on (part of) the signal to be measured,
theinput canbeconnectedtothesignalthroughadirectlink
or by using a decoupling capacitor.
Select DC for measuring DC voltage.
Press the “AC/DC” key to select either AC or DC input
coupling (see indications on the screen).
F When measuring the ”ripple” of a DC voltage : put
the input on AC to limit the measurement to the AC
component of the signal.
Reset
AC/DC
OPERATION

12
PersonalScopeTM
Switching from one readout to another
The Personal Scope offers many voltage measur-
ing possibilities.
Press the “readout” key repeatedly to select one of four
possible readouts :
Peak voltage (Vp). The signal's peak-to-peak voltage
(difference between
highest and lowest
value) is displayed.
True RMS readout (Vr). The area of the AC wave is
calculated and converted to voltage. Please remember that
a correct readout invariably consists of at least one or two
visible periods (one can also use the auto-setup function).
dB measurement (dB). The measured signal is converted
to dBm (0dB=0.775V). Once more, the user should make
sure that at least one or two periods are displayed or select
the auto-setup function).
DC voltage measurement (V=). This function enables the
user to measure DC voltages (only for DC input coupling)
F Useful tip for measuring DC voltages:
The readout can be set at zero (reference) for any
position on the screen by keeping the AC/DC key
pressed down. Always use the "run" trigger mode
for DC voltage measurement.
NOTE: If the signal goes off-screen or when the dB-
signal is too small for
measurement, the
display will show.....
OPERATION

13
PersonalScopeTM
Measuring probe adjustment
We advise the user to use a measuring probe
equipped with a X10 setting when high or unknown
voltages or high impedances need to be measured.
When using the measuring probe in the X10 position, the
measuring impedance will increase to 10Mohm, thereby
reducing the mea-
suring instrument's
charge on the cou-
pling.
Press the “x1/x10”
key in order to ad-
just the display to
the setup of the
measuring probe.
Upon choosing
X10, “X10” will be
indicated on the
screen and all measuring values will be adjusted accord-
ingly.
IMPORTANT : X10 measuring probes should be cali-
brated. Read “Setting up a X10 measuring probe".
Auto-setup function
Theauto-setupfunctionis ideally suitedforquick
measurements as no manual setup has to be made and
everything is automatic.
F Use the auto-setup function when the screen no
longer displays a signal after the manual setup.
• Connect the signal to be checked to the BNC input by
means of a special measuring lead or measuring probe.
• Activate the unit.
• Press “Auto”in order to (de)activate the auto-setup
function.
When “auto setup” is engaged, the Volt/div and Time/div
readouts are highlighted.
The auto setup function will provide correct measurements
for repetitive and stable signals of max. 400KHz.
The display may read as follows :
probe
x1/x10
x1 x10
x1 x10
Auto
OPERATION

14
PersonalScopeTM
IMPORTANT: Put the appropriate measuring
probe in the X10 position for measuring high
voltages (>100Vp + DC).
NOTE:
⇒ The Y-position does not work in auto-setup, which
is why the trigger setup remains in run or normal
mode.
⇒ The auto-setup function will deactivate when using
the Trigger , Volt and time per division and Y
position functions. (see further).
Signal screen
The signal screen is an aid in displaying the
divisions on your screen or in positioning movable markers
on the screen.
Press the “Display” key repeatedly in order to engage the
various aids:
• A grid divides the screen into reference points.
• A cross inserts a co-ordinate system into the screen.
• Markers: Moveable markers in order to measure the
signal (see below for use).
• Empty : no aids.
!
Display
GRID
CROSSHAIR
MARKERS
OPERATION

15
PersonalScopeTM
Screen memory
It may be useful to "freeze" certain signals on
your screen. This will allow the user to study the signal or
perform measurements with the markers.
Press ‘Hold’ to freeze the screen.
F The screen is also saved when the unit is deacti-
vated.
F The memory will be erased if “reset” is pressed or if
the battery voltage is too low.
Set-up function keys
The selected function is dis-
played in the bottom right
hand corner of the screen.
The four blue function keys
work in conjunction with the
arrow keys.
The markers
Theuser canperformmeasurementsonacertain
signal by using the four moveable markers.
This can be useful
when measuring the
interval between two
points or the ampli-
tude of any given
peak.
The following indications will appear on the screen :
The time interval between two vertical
markers.
Thecalculatedfrequency (primarilyusedfor
the measurement of periods).
The voltage between two horizontal mark-
ers.
The markers can be moved through the arrow keys.
Keeping the key pressed down will move the marker
quickly, pressing it briefly will move the marker by 1
position. The “mark 1-2” key is used to select the desired
marker.
Hold mark 1-2
HPS5
mark 1-2
trig
t-V/div
Y-pos
probe
x1/x10
Hold
Display
AC/DC
Auto
Reset
Charge
Slope
Trigger
mode
P E R S O N A L
S C O P E
Trigger
mode Slope
OPERATION

16
PersonalScopeTM
F Determining the frequency of a signal requires the
measurement of a period. The easiest way to do this
would be by placing the vertical markers either on
two consecutive peaks or two identical slopes of a
signal.
Setting up the voltage per division
The user can enlarge or reduce the signal on the
screen vertically by adjusting the displayed voltage per
division. (V/div = voltage per division). The divisions can
be made visible through the Display key (see page 16).
Press the “t-V/div” key
Press the ⇑or the ⇓key to select the sensitivity : from
5mV to a maximum of 20V per division.
F 50mV to 200V with X10 probe selection
Setting up the time base
Adjusting the time base will visualise more or
fewer periods of a signal (t/div = time per division). The
divisions can be visualised through the Display key (see
page 16).
Press the “t-V/div” key
Press the ⇐ the ⇒ key to set the time base between 20s
and 2µS per division.
ATTENTION : the positions 10µs, 4µs and 2µs only
operates correctly with periodic signals, for which the unit
will automatically select the ‘normal’ trigger mode. The
screen will be adjusted once the trigger level is reached.
NOTE: Use the minimum time base (2 microsec) as a
startingpointwhenmeasuringasignalandselectlonger
time bases until the signal is displayed properly. Other-
wise the display may not correctly reflect the signal
under measurement due to aliasing.
Moving the signal in Y-position
Press the “Y-pos” key
Press the ⇑key or the ⇓key in order to move the signal
inthedirectionof the arrows.Prolongedpressing will make
the Y- position change faster. A small dot in the left-hand
corner of the screen will indicate the direction in which the
signal has moved. In this manner, the user will know in
which direction the signal was going when it went off-
screen.
t-V/div
t-V/div
Y-pos
OPERATION

17
PersonalScopeTM
Trigger functions
The Personal Scope is equipped with a number
of "trigger" aids that are used when the signal can be
displayed on-screen.
Press the “trig” key.
The ⇐ (trigger mode) key enables the user to select the
appropriate triggering method, the ⇒(slope) key is used to
select the trigger slope (see below).
Press the ⇐ key repeatedly to choose between :
“run” mode: The signal will always appear on the
screen, regardless of the level involved. This
position is used most frequently and should always
be used for measuring DC voltages in particular.
“norm” mode: The screen will be adjusted pro-
vided that the signal falls within the trigger level
(interruption in the vertical line on the left-hand
side of your screen). Use this mode when you want
to start displaying the signal when it reaches a
preset threshold value.
“once” mode: The screen is adjusted one single
time,viz.when thetriggerlevel isreached.Use this
mode to detect e.g. a short, once-only voltage peak.
ATTENTION : in the positions 10µs, 4µs and 2µs the unit
will automatically select the ‘norm’ trigger mode. The
trigger level has to be reached for the screen to be adjusted.
F Both the ⇑and the ⇓key remain active in order
to move the signal along the Y-axis, which enables
the user to programme a trigger reference
Repeatedly press the ⇒key to choose between :
Triggering on the rising slope of the signal. The screen
will only display the signal when a positive slope is
"detected", viz. the signal has to rise in vertical direc-
tion in order to trigger.
Triggering on the falling slope of the signal : The screen
will only display the signal when a negative slope is
"detected", viz. the signal has to drop in vertical direc-
tion in order to trigger.
NOTE : There is a time difference of ±12µs between the
trigger point (the interruption in the vertical line on the
left-handside ofthescreen) andthestartoftheactualdisplay.
This is specifically true on higher frequencies.
trig
Trigger on rising slope Trigger on falling slope
OPERATION

18
PersonalScopeTM
Setting up a X10 measuring probe
When used in the X10 position, a measuring probe should
always be callibrated to the measuring instrument being
used, in this case the Personal Scope.
• Open the battery cover.
• Set the probe input to X10
• Set the voltage per division to 1V
• Set the time per division to 0.2ms
• Select AC for the input.
Use the probe to perform measurements at the preselected
point under the battery cover
Adjust the trimmer of
themeasuringprobe in
order to obtain a
square wave signal
with a top that is as flat
as possible. MAINTENANCE
Clean the display with a shammy. NEVER use a dustcloth
or paper in order to avoid scratches. The rest of the unit can
be cleaned with a soft, dry cloth. NEVER use water to clean
the unit.
probe
test
x10
OK
NG NG
OPERATION

19
PersonalScopeTM
TROUBLESHOOTING
The screen remains blank or there is no signal :
• No power supply
• Batteries are discharged
• Contrast adjustment is incorrect
• Press RESET for at least 10 seconds
REMARK: Temporarily remove both batteries and adapter
in case RESET is not yet operational.
RMS readout is incorrect :
• Make sure that at least 1 and preferably even 2 periods
are displayed.
• The batteries are discharged.
No signal on the oscilloscope display :
• Time/div setting is in the wrong position. Try 1ms or
choose auto-setup mode.
• The unit is in the Hold position
• Trigger function is set in the “once” position
• The programmed trigger level is not reached (choose
“run” mode)
• Y position is wrong
• The input signal is too high, change the volt/div. setting
or choose auto-setup.
Incorrect frequency readout:
• An incorrect time/div. setting has been chosen. (start at
2µs)
Voltage readout does not correspond with the
actual value :
• The measuring probe is in the X10 position
• The batteries are discharged
• The zero refrence is not set correctly for DC measure-
ments.
• Take into account that the RMS readout only measures
the AC voltage
WARRANTY
This product carries a one-year warranty as far as the craftsmanship and
possible flaws in the materials are concerned. The warranty expires ONE
YEAR after the date of purchase.
The warranty will only apply if the unit is wrapped in the original packing
material and either presented to VELLEMAN-KIT N.V or to an official
distributor together with a copy of the original purchasing document.
VELLEMAN-KIT N.V. is under the obligation to repair defects and
flaws, but is free to either replace or repair defective parts.
The warranty does not apply to software, fuses, measuring probes and
batteries. VELLEMAN-KIT N.V will not be held responsible for any flaw
or defect which the company feels is due to negligence on behalf of the
user, to modification or opening of the unit, or to accidents or abnormal
use or treatment of the product.
VELLEMAN-KIT N.V will not reimburse the transport costs or risks, the
costs for removing and replacing the product or any other costs that are
directly or indirectly related to the defect. VELLEMAN-KIT N.V. accepts
no liability for whatever damages may be caused by a malfunctioning
product.
TROUBLESHOOTING

20
PersonalScopeTM
SK1
DC JACK
1
2
SK2
BATTERY
+
-
F1
FUSE 2A
GND
R1
15 LD1
LED3RL
R2
330
GND GNDGND
GND
R5
47K
+
C1
100µ C6 100n C7 100n
GND
+C20
100µ
R3
330
GND
AGNDDGND
L1
220µ +C23
100µ
+V1
+V6
AGND
+V3
R15
10K
+V1
R26
1K R27
1K
GND
PWM
L2
220µ
L3
220µ
+
C24
100µ
AGND
+V2
+
C2
100µ
GND
+
C3
100µ
+
C4
100µ
GND
+
C5
100µ
GND
R32
1K
+
C25
100µ
L4
220µ
+
C26 100µ
AGND
-V2
-V1
Personal Scope: Power Supply Section
+
C27
100µ
T1 BDP32
T2
BDP31
AGNDGND
D6
PRLL4001
D7
PRLL4001 T3
PMBT2222A
T11
PMBT2907A
T4
PMBT2222A
T5
PMBT2222A
R33
22K
GND
T12
PMBT2907A
R16
10K
R35
4K7
R34
22K
DGND
T6
PMBT2222A
DGND
R17
10K
+V1
LOW BAT
JP1
0
JP2
0
IN
1OUT 3
GND
2
GND
4
IC1
LM2940S5.0(3)
D11
BAS85
PWR
R60
47K
D12
BAV99
T13 PMBT2907A
D1
BAT54S D2 BAT54S ZD1
PMBZ5240B
1
SPR
SCREENING
1
TP4
GND
D13
PRLL4001
POWER SUPPLY SECTION