Promax OS-782 User manual

OS-782
DIGITAL OSCILLOSCOPE & MULTIMETER
- 0 MI1737 -
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

SAFETY NOTES
Read the user’s manual before using the equipment, mainly " SAFETY
RULES " paragraph.
The symbol on the equipment means "SEE USER’S MANUAL". In
this manual may also appear as a Caution or Warning symbol.
Warning and Caution statements may appear in this manual to avoid
injury hazard or damage to this product or other property.

User’s Manual. OS-782
English
TABLE OF CONTENTS
1GENERAL..................................................................................................................1
1.1 Description ..........................................................................................................1
1.2 Specifications Oscilloscope................................................................................. 2
1.3 Specifications Multimeter ....................................................................................5
2SAFETY RULES........................................................................................................7
2.1 General................................................................................................................ 7
2.2 Descriptive Examples of Over-Voltage Categories .............................................9
3DESCRIPTION FOR FRONT PANEL AND KEYS ..................................................11
4USING THE OSCILLOSCOPE ................................................................................ 13
4.1 Power-Up the oscilloscope................................................................................13
4.2 Charging the oscilloscope ................................................................................. 13
4.3 Oscilloscope Operation Window .......................................................................14
4.4 Navigating a Menu ............................................................................................16
4.5 Manually Setting the Vertical System, Horizontal System and Trigger Position17
4.6 Resetting the Oscilloscope................................................................................20
4.7 Displaying an Unknown Signal with Auto Set ................................................... 20
4.8 Automatic zero-returning of trigger horizontal position and trigger level position..... 21
4.9 Automatic Measurements..................................................................................21
4.10 Freezing the Screen .......................................................................................... 22
4.11 Setting the Vertical CH1 and CH2.....................................................................23
4.11.1 Setting the Channel Coupling ..................................................................... 24
4.11.2 Make Open and Close Settings on Channel...............................................25
4.11.3 Adjusting the Probe Scale........................................................................... 25
4.11.4 Setting of Inverted Waveform .....................................................................26
4.12 MATH function “MATH” ..................................................................................... 26
4.13 Setting the Trigger System. TRIGGER Function...............................................27
4.14 Triggering Control..............................................................................................28
4.14.1 Edge triggering............................................................................................29
Description..............................................................................................................29
4.14.2 Video triggering........................................................................................... 30
4.15 Acquiring Mode Setting .....................................................................................33
4.16 Display Setting ..................................................................................................33
Settings...................................................................................................................33
4.16.1 Display Style ...............................................................................................34
4.16.2 Persistence .................................................................................................34
4.16.3 XY mode .....................................................................................................35
4.17 Waveform Saving Setups..................................................................................35
4.18 Function Setting Menu ......................................................................................36
4.19 Making Automatic Measurements.....................................................................37
4.20 Setting the Cursor Measurements.....................................................................40
4.21 Autoscale........................................................................................................... 42
4.22 System State Menu...........................................................................................45
4.23 Horizontal axis setting. HORIZONTAL function ................................................46
4.24 Data transmission to the PC.............................................................................. 47

User’s Manual. OS-782
5USING THE MULTIMETER.....................................................................................49
5.1 About this chapter .............................................................................................49
5.2 Making Meter Connections................................................................................49
5.3 Multimeter Operation Window ........................................................................... 49
5.4 Making Multimeter Measurements .................................................................... 51
5.4.1 Measuring Resistance Values ....................................................................51
5.4.2 Making a Diode Measurement. ................................................................... 51
5.4.3 On-off test ...................................................................................................52
5.4.4 Making a Capacitance Measurement .........................................................53
5.4.5 Making a DC voltage Measurement (VDC).................................................54
5.4.6 Making a AC voltage Measurement (VAC).................................................54
5.4.7 Making a DC current Measurement (AAC) ................................................. 55
5.4.8 Making an AC Current Measurement .........................................................57
5.5 Freezing the Readings. ..................................................................................... 58
5.6 Taking a relative measurement.........................................................................59
5.7 Selecting automatic/manual range adjustment .................................................60
6TROUBLE SHOOTING............................................................................................61
7MAINTENANCE AND CLEANING...........................................................................63
7.1 Basic maintenance............................................................................................63
7.2 Cleaning ............................................................................................................63
7.3 Storage of oscilloscope .....................................................................................63
7.4 Substitution of the battery of lithium. .................................................................63

USER’S MANUAL. OS-782
Page 1 02-2010
English
Oscilloscope & Multimeter
Digital Storage
OS-782
1 GENERAL
1.1 Description
The OS-782 poliscope has two measurement instruments built-in: one digital
oscilloscope and one multimeter. Its rugged construction, small size, lightweight and
battery-powered, lead it to be a handheld instrument ideal to carry out multiple external
measurements, where to work with conventional equipments it is very uncomfortable. It
is very useful to measure the electrical magnitudes and to repair electronic equipments
given its large diversity of functions, which causes that it become an useful tool in
laboratories, as well as for R&D and training activities.
The measurement carried out by the equipment appears on a hi-resolution LCD
with backlight.
Their basic characteristics in each one of their operating modes are:
• Two-channels oscilloscope with bandwidth of 20 MHz.
• Sampling rate of 100 MS/s.
• Trigger: TV and edge.
• 20 automatic measurements modes.
• Auto-scale function.
• Memory depth of 6k points by channel.
• USB port.
• Digital Multimeter of 3 ¾ for measurements of R, V, A and C.
• AC adapter and LI-ion battery.
• Display LCD colour of 3.8 " with backlight, 320x240 pixels.
• Vertical and horizontal cursors.

USER’S MANUAL. OS-782
02-2010 Page 2
1.2 Specifications Oscilloscope
Only if another instructions are provided, are all technical specifications applicable
to the probe with the 10X attenuation switch setting and the HDS series digital type
oscilloscope. In order to be up to these specifications, the oscilloscope should meet the
following requirement.
• The instrument should operate continuously for more than 30 minutes under
the specified operating temperature.
• If the operating temperature range of variation is up to or larger than 5
Celsius degrees, the system function menu must be opened to make the
system perform a “self - calibration” procedure.
Except those specifications marked with the word “Typical”, all specifications can
be up to.
SAMPLING
Sampling modes Normal sampling.
Peak detection.
Average value.
Sampling rate 100 MSa/s.
INPUT
Input coupling DC, AC, Ground.
Input impedance 1MΩ± 2 % connected in parallel with 20pF
± 5 pF.
Probe attenuation coefficient 1x, 10x, 100x, 1000x.
Max. Input voltage 400V (peak).
Channel delay time(typical) 150 ps.
HORIZONTAL
Sampling rate range 10S/s~100MS/s.
Waveform interpolation (sin x)/x.
Record length 6 K points on each channel.
Scanning speed range (S/div) 5ns/div~100 s/div, stepping in the “1- 2.5 - 5“.
Sampling rate and relay time
accuracy ±100ppm(any time interval which is equal to or
larger than 1ms).
Time interval (T) measurement
Accuracy full bandwidth l Single: ± (1 sampling interval time+100 ppm
reading+0.6 ns)>average 16: ±(1 sampling
interval time +100 ppm reading+0.4 ns).

USER’S MANUAL. OS-782
Page 3 02-2010
English
VERTICAL
Analog digital converter (A/D) With the resolution of 8 bits, make sampling on
both channels synchronously.
Sensitivity range (V/div) 5mV/div~5V/div at the input BNC.
Displacement range ±50 V(500 mV~5 V), ±2 V(5 mV~200 mV).
Analog bandwidth 20 M.
Single bandwidth Ancho de banda completo.
Low frequency response ≥5Hz (at the BNC ).
(coupling, AD, -3dB
Rise time ≤17.5ns.
(typical one at the BNC)
DC gain accuracy ±5 %.
DC measurement accuracy The voltage difference (V) between any two.
(average value sampling mode) points on the waveform after averaging the
captured waveforms more than16: ±(5%
reading + 0.05 divisions).
Trigger
Trigger sensitivity (Edge triggering)
DC coupling CH1 and CH2: 1div(DC~ full bandwidth).
AC coupling Same as the DC coupling when it is equal to or
larger than 50Hz.
Triggering lever range ±6 divisions from the screen center.
Triggering level accuracy ±0.3 divisions
(typical) which is applicable to
the signal with rise and fall time
equal to or longer than 20ns
Trigger displacement 655 divisions for pre-triggering and 4 divisions
for post- triggering.
Trigger Holdoff range 100 ns~10 s.
Make a 50% level setting (Typical). Operation with the input signal frequency equal
to or larger than 50Hz.
Trigger sensitivity (Video 2 divisions of peak-to-peak value.
Triggering and typical mode)
Signal system and line/field Support the NTSC, PAL and SECAM frequency
(Video triggering mode) broadcasting systems
of any field or line frequency.
Measurement
Cursor measurement Voltage difference (∆V) and time difference
(∆T) between cursors (∆V).
Auto measurement Peak-to-peak value, average value, root mean
square value, Frequency, cycle period, Vmax,
Vmin,Vtop, Vbase, Vamp, Overshoot, Preshoot,
RiseTime, Fall Time, +Width, -Width, +Duty,
-Duty, Delay A B and Delay B A.

USER’S MANUAL. OS-782
02-2010 Page 4
GENERAL SPECIFICATIONS
Display
Display type 3.8’’ color LCD display.
Display resolution 320 (horizontal) x 240 (vertical) pixels.
Power consumption 4096 colors.
Mechanical features
Dimensions 180 (W) ×115 (H) ×40 (D) mm.
Weight 0.645 kg.
Power supply
Internal 7.4 V Li-Ion Built-in Rechargeable battery.
External Means network adapter included. For Europe
and other countries.
Input 100-240 VAC 50 Hz / 6W.
Working environment
Temperature Operation 0 to 50 °C.
Power adapter 0 to 40 °C.
Storage Temperature -20 to +60 °C.
Humidity in operation
0 to 10 °Cno condensation.
10 to 30 °C95 %
30 to 40 °C75 %
40 to 50 °C45 %
Humidity in storage
0 to 10 °Cno condensation
ACCESSORIES
Two 1:1 (10:1) passive oscilloscope probes of 1.2 meters long SA016 x1 x10.
A pair of test leads of multimeter PP013.
One communication cable for USB port.
A measuring extension module for small current
A measuring extension module for small capacitance.
One AC power adapter for Europe and other countries (AL782)
A User Manual.0 MI1452
An operational optical disk.
A software CD.

USER’S MANUAL. OS-782
Page 5 02-2010
English
1.3 Specifications Multimeter
Maximum tension of the points of measure to land 400V CAT II
Voltage (VDC)
Input Impedance: 10MΩ
Range Accuracy Resolution
400 mV 100 µV
4.000 V 1 mV
40.00 V 10 mV
400.0 V
± 1% ± 1 digit
100 mV
Input protection 1000 VDC or peak AC
Voltage (VAC)
Input Impedance: 10M Ω.
Frequency range: from 40 Hz to 400 Hz.
Display: Virtual value of the sine wave.
Range Accuracy Resolution
4.000 V 1 mV
40.00 V 10 mV
400.0 V ± 1% ± 3 digits 100 mV
Input protection 750 VDC or peak AC
Direct Current (ADC)(1)
Range Accuracy Resolution
40.00 mA ± 1% ± 1 digit 10 uA
400.0 mA ± 1.5% ± 1 dígito 100uA
20A(2) ± 3% ± 3 dígitos 10 mA
Alternating Current (AAC) (1)
Range Accuracy Resolution
40.00 mA ± 1.5% ± 3 digits 10 uA
400.0 mA ± 2% ± 1 digit 100 uA
20A(2) ± 5% ± 3 digits 10 mA
(1) ATENTION: Not to overcome in any case 400mA or 20A respectively.
(2) With the extension module of measure of current.

USER’S MANUAL. OS-782
02-2010 Page 6
Resistance
Range Accuracy Resolution
400.0 Ω± 1% ± 3 digits 0.1 Ω
4.000k Ω1 Ω
40.00k Ω10 Ω
400.0k Ω100 Ω
4.000M Ω
± 1% ± 1 digit
1 KΩ
40.00M Ω± 1.5% ± 3 digits 10 KΩ
Capacitance
Range Accuracy Resolution
51.20 nF 10pF
512.0 nF 100pF
5.120 uF 1nF
51.20 uF 10nF
100 uF
± 3% ± 3 digits
100nF
Diode
Voltage reading: 0 V ~ 1.5 V
On-off Test
You can a beep sound when the on-resistance is less than 50Ω.