Iwatsu SS-7821/11 User manual

Operation Manual
Oscilloscope
SS-7821/11
SS-7810/06
IWATSU

Introduction
OThank you very much for your purchase of Iwatsu electronic measuring instruments. We
appreciate your continued patronage of Iwatsu electronic measuring instruments.
OPlease use your instrument after thoroughly reading this instruction manual and
understanding its contents. After reading this manual, please keep it in asafe place for
future reference.
Cautions for safe use
Matters that must be observed for safe operation of this instrument and for prevention of
injury to humans and damage to property are described as “^warnings” and “/K cautions”
in this instruction manual. The symbol to invoke caution is marked on the panel.
Explanation of “^warnings” and “/j\ cautions” columns in this instruction manual
/i\ Warning Incorrect operation or failure to need warnings may result in death or
serious injury.
/i\ Caution Incorrect operation or failure to need cautions may result in injury or
damage to equipment.
Explanation of the symbols on the panel
Warning symbol
This asymbol used in reference with the statements in the
instruction manual to protect human against injury and protect
this instrument against damage.
Cautions
OParts of the contents of this instruction manual may be modified without notice to
accommodate improvements in performance and function.
OReproduction of the contents of this instruction manual without previous consent is
prohibited.
History
ONov. 1994: Issue of the 1st edition
OMay. 1998: Issue of the 5th edition
KML007141 F7401-216501(B)

Be sure to read this page to assure safety. Read the next page also.
Warnings
#Do not use this instrument in aiocation where
there is expiosive gas in the vicinity.
The use of this instrument in alocation where there is explosive gas could result
In explosion.
#lf there is any smoke, abnormal odor, or abnormal
sound coming display type this instrument,
immediately set the power switch to STBY and
disconnect the power cord.
Use of this instrument under these conditions could result In electrical shock or
fire. After setting the power switch to STBY and disconnecting the power cord,
contact one of our service offices for repair. Repair by the user is dangerous and
should be strictly avoided.
#Take care to not allow water to get into this
instrument or the wetting of this instrument.
The use of this instrument in awet state could result In electrical shock or fire. If
water or other foreign matter has gotten into this instrument, first set the power
switch to STBY and remove the power cord and then contact one of our service
offices for repair.
#Do not place this instrument on an unstable place
such as on ashaky stand or on aslant.
The dropping or turning over of this instrument could result in electrical shock,
injury, or fire. If this instrument has dropped or its cover has been damaged, first
set the power switch to STBY and remove the power cord and then contact one
of our sen/ice offices for repair.
#Do not allow any foreign matter such as metal or
inflammable substance to get in from the air hole,
etc.
The entrance of any foreign matter display type the ventilation port, etc., could
result in fire, electrical shock, or power failure. If any foreign matter has entered,
first set the power switch to STBY and remove the power cord and then contact
one of our service offices for repair.
-II-

Be sure to read this page to assure safety. Read the next page also.
/1\ Warnings (cont’d)
#Be sure to use a3-core power cord.
Failure to use a3-core power cord could result in electrical shock or power
failure.
•When supplying power display type a2-wire receptacle using a3-core/2-core
conversion adapter, be sure to connect the grounding terminal of the 3-core/2-
core conversion adapter to ground.
•When supplying power display type a3-wire receptacle using the attached 3-
core power cord, the grounding wire of the power cord is connected to ground.
#Use this instrument with the rated AC power
supply.
Use of this instrument with avoltage other than specified could result in electrical
shock, fire, or power failure. The usable power voltage range (90 to 132 VAC or
180 to 250 VAC) is marked on the rear panel.
#Be sure to connect the ground side of probes and
input connectors to the grounding potential of the
object being measured.
If the grounding lead is connected to potential other than the ground, electrical
shock or other accidents (damages to the object being measured, the instrument
itself or other units connected to the instrument) may occur (refer to the “Example
of improper configuration” shown below).
[Example of improper configuration]
The chassis assumes a
voltage of 100 Vand is dangerous.
+100 and chassis short circuit.
lead
When measuring the floating potential, measurement by the differential method
(CHI and CH2 input) is recommended (refer to the example shown below).
[Example of recommended measurement method]
Main body
-III

Be sure to read this page to assure safety. Read the next page also.
/KWarnings
#Do not remove either the cover or panel.
There are high-voltage parts inside the cover and panel and touching any of them
could result in electrical shock. Please contact one of our service offices for any
inspection, calibration, or repair.
#Take sufficient care when measuring high
voltages.
Touching ahigh-voltage part during measurement could result in electrical
shock.
#When carrying this instrument with ashoulder
bag, use only an appropriate bag.
If an inappropriate shoulder bag is used, the instrument may drop and cause
injury.
If there are any questions concerning the safety of ashoulder bag, such as
broken seams or weakened straps, do not use the bag.
#When handling the power cord, strictly observe
the following:
Failure to heed this Inspection could result in fire or electrical shock. If the power
cord has been damaged, contact one of our service offices (at the end of this
volume) for repair,
•Do not modify the power cord. •Do not pull the power cord.
•Do not bend the power cord forcibly. •Do not heat the power cord.
•Do not twist the power cord. •Do not moisten the power cord.
•Do not bundle the power cord. •Do not place aheavy object on the
power cord.
#Do not modify this instrument.
Modification of this instrument could result in electrical shock, fire, or power
failure. Repair of amodified instrument may be refused.
-IV-

Be sure to read this page to assure safety. Read the next page also.
A\Cautions
#Be sure to use aspecified fuse (<j>5 x20 mm, 250 V, 2A, SLOW) when
replacing the fuse.
The use of afuse other than aspecified one could result in fire or power failure.
Disconnect the power cord when replacing the fuse.
#Be sure to use athree-core power cord suitable for the supply voltage.
The use of acord that is not suitable for the supply voltage may cause fire.
Also, the use of atwo-core power cord may cause electrical shock.
#Be sure to connect and disconnect the power cord after setting the power
switch to STBY.
Connection and disconnection of the power cord with power supplied could result
in electrical shock or power failure.
#When disconnecting the power cord display type the receptacle, pull it by
holding the plug.
Pulling by the cord may damage the cord and could result in fire or electrical
shock.
#Avoid use of any damaged cable or adapter.
The use of any damaged cable or adapter could result in fire or electrical shock.
#Avoid placing any object on this instrument.
If any object is placed on this instrument, the cover may contact the internal
circuity and could result in electrical shock, fire, or power failure.
#Do not place any object in the vicinity of the air hole or fan of this
instrument.
Placing any object in the vicinity of the air hole or fan may generate internal heat
and could result in fire or electrical shock.
#Do not place this instrument in alocation with ahigh degree of moisture or
dust.
Placing this instrument in alocation with ahigh degree of moisture or dust could
result in fire or electrical shock.
#When using this instrument in an upright position, take care not to allow it
fall over.
The falling over of this instrument could result in injury, fire, or electrical shock.
#When probes or measuring cables, etc. are connected to this instrument,
take care not to cause this instrument to fall over by pulling them.
The falling over of this instrument could result in injury, fire, or electrical shock.
#Do not use this instrument if it has failed.
The use of this instrument in astate of failure could result in fire or electrical
shock. In the case of failure, contact one of our service offices for repair.
-V-

Be sure to read this page to assure safety.
/?\ Cautions
#Always use this instrument only within the rated operating range.
The use of this instruction out of the rated operating range could result in power
failure. The temperature and humidity ranges that allow the use of this
instrument are as follows:
Operation :Indoor use only
Temperature ;0°Cto+40“C
Relative humidity :90% or less (at O'C to +40“C)
#Do not apply voltage to an input terminal exceeding the posted rating.
Applying avoltage exceeding the posted rating could result in power failure. The
maximum voltage than can be applied is as follows:
•SS-7821
Direct :±400 V(DC+ACpeak)
With probes equivalent to SS-082R (10:1) :±600 V(DC+ACpeak)
•SS-7811/7810/06
Direct :±400 V(DC+ACpeak)
With probes equivalent to SS-0130R (10:1) :±600 V(DC+ACpeak)
[Note] The maximum input voltage derates depending on frequency and high
voltage pulse of an Input signal.
#Do not raise trace or character intensity beyond what is necessary.
The use of an Intensity beyond what is necessary could result in eye fatigue or
burn in of the CRT.
#Leave space side and rear.
When using this instrument in acabinet or putting on the other instruments, the
scope may overheat, it could result failure of operation and specifications,
contact our Service Office.
#To assure safety, be sure to disconnect the power cord if the instrument is
not to be used for along period.
#When transporting this instrument, be sure to use the original packing
material that came with the instrument or other packing material that is
equal or superior.
Large vibrations and/or shocks applied to the instrument during transpiration
could result in power failure and fire. If there is no appropriate packing material
and/or cushion material, consult one of our service offices.
When using acarrier, label “precision machine” on each face of the packing box.
-VI-

Contents
Cautions for safe use
Warnings
Cautions
Unpacking
Components
Replacement of built-in battery
Section 1.Controls, Connectors and Indicators
1.1
Front Panel
1.2 RearPanel 3
Section 2. Basic Operation 4
2.1 Displaying CAL signal with AUTO SET 6
2.2 Probe Compensation T
2.3 Display Adjustment 8
2.4 Vertical and Horizontal Positioning 9
2.5 Vertical Deflection System 9
2.5.1 Deflection Factor 9
2.5.2 Input Coupling 10
2.5.3 Display Channels 1
1
2.5.4 ALT and CHOP 11
2.5.5 Sum (ADD) and Difference (INV) 12
2.5.6 Bandwidth Limiter 12
2.6 Sweep Rate and Magnification 13
2.6.1 Sweep Rate 13
2.6.2 Magnification
2.7 Sweep Mode
2.7.1 Repetitive Sweep
2.7.2 Single Sweep
2.8 Triggering
2.8.1 Trigger Source 15
2.8.2 Trigger Coupling 15
2.8.3 Trigger Slope 16
2.8.4 Trigger Level 16
2.8.5 TV Signal 17
2.9 Horizontal Display 18
2.10 Trace Separation 19
2.11 Delayed Sweep 20
2.11.1 Continuous Delay 20
2.11.2 Triggered Delay 21
2.12 Holdoff 22
-VII-

Section 3. Cursor Measurement and Counter 23
3.1 Time Difference (At) and Frequency (1/At) 23
3.2 Voltage Difference (AV) 25
3.3 Counter 26
Section 4. Save/Recall 27
4.1 Save 27
4.2 Recall 27
Section 5. Daily Inspection 28
Sections. Specifications 21
SS-500/501/502/505(CH2 0UT, ZAXISIN) 36
Probe SS-082R 37
Probe SS-01 30R/01 31 R38
-VIII-

Unpacking
The figure below depicts the unpacking procedure.
•SS-7821/7811/7810/06 1
•Accessories
Power cord (three-core type) 1
Probe (10:1) 2
For SS-7821 :SS-082R
For SS-781 1/10/06 :SS-0130R
Front cover 1
Fuse 2
Instruction manual 1
Replacement of built-in battery
•The built-in battery is not commercially available. Please contact your nearest sales
representative to obtain areplacement.
•If the battery is exhausted, the setup conditions are initialized when the power is turned
on.
-IX-