YOKOGAWA 701946 User manual

User’s
Manual Model 701946
Miniature Passive Probe
IM 701946-01EN
5th Edition

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PIM 103-06E-A5

1
IM 701946-01EN
Thank you for purchasing the model 701946 miniature passive probe. To ensure
correct use, please read this manual thoroughly before beginning operation.
After reading this manual, keep it in a convenient location for quick reference in
the event a question arises during operation.
List of Manuals
The following manuals are provided for the 701946 miniature passive probe.
Manual Title Manual Number Description
Model 701946
Miniature Passive Probe
User’s Manual
IM 701946-01EN This manual. Explains usage,
specifications, and the handling
precautions of the 701946.
Model 701946
Miniature Passive Probe
IM 701946-92Z1 Document for China
Safety Instruction Manual IM 00C01C01-01Z1 Safety manual (European languages)
The “EN” and “Z1” in the manual numbers are the language codes.
Contact information of Yokogawa o󰀩ces worldwide is provided on the following
sheet.
Document Number Description
PIM 113-01Z2 List of worldwide contacts
Notes
• The contents of this manual are subject to change without prior notice
as a result of continuing improvements to the product’s performance and
functionality. The gures given in this manual may di󰀨er from those that
actually appear on your product.
• Every e󰀨ort has been made in the preparation of this manual to ensure the
accuracy of its contents. However, should you have any questions or nd
any errors, please contact your nearest YOKOGAWA dealer.
• Copying or reproducing all or any part of the contents of this manual without
the permission of YOKOGAWA is strictly prohibited.
Trademarks
• Adobe and Acrobat are either registered trademarks or trademarks of Adobe
Systems Incorporated.
• In this manual, the ® and TM symbols do not accompany their respective
registered trademark or trademark names.
• Other company and product names are trademarks or registered trademarks
of their respective holders.
Revisions
• 1st Edition: May 2011
• 2nd Edition: March 2016
• 3rd Edition: October 2017
• 4th Edition: June 2021
• 5th Edition: May 2022
5th Edition: May 2022 (YMI)
All Rights Reserved, Copyright © 2011 Yokogawa Test & Measurement Corporation

2IM 701946-01EN
Conventions Used in This Manual
Improper handling or use can lead to injury to the user or damage
to the instrument. This symbol appears on the instrument to
indicate that the user must refer to the user’s manual for special
instructions. The same symbol appears in the corresponding place
in the user’s manual to identify those instructions. In the manual,
the symbol is used in conjunction with the word “WARNING” or
“CAUTION.”
WARNING Describes precautions that should be observed to prevent serious
injury or death to the user.
CAUTION Describes precautions that should be observed to prevent minor
or moderate injury, or damage to the instrument.
Note Provides important information for the proper operation of the
instrument.
Safety Precautions
This product is designed to be used by a person with specialized knowledge. To
safely operate this product and to fully utilize its functionality, strictly observe the
following cautions.
This product complies with the requirements stated in measurement categories
II dened in IEC 61010-031.
If this probe is operated in a manner not specied in this manual, this may cause
the protection capability of this product to lessen. Additionally, YOKOGAWA shall
not be held responsible for defects arising from negligence of such warning and
caution, and also shall not guarantee the product in such case.
Before using this probe, thoroughly read the instruction manual for measuring
instrument to fully understand the specications and handling precautions for
safe and correct operation.
WARNING
• Purpose of the product
The product is used in combination with an oscilloscope to
observe and measure electrical signals. Do not use for any other
purpose.
• Grounding of the measuring instrument
The protective grounding terminal of the oscilloscope must be
connected to ground.
• Grounding of the probe
Make sure to connect the ground lead of the probe to the
grounding potential.
• Be careful of electric shock
Never use the probe with wet hands or when the probe itself
is wet. Doing so may cause electric shock. Be careful of
electric shock when you connect the probe to the device under
measurement. Do not remove the probe from the oscilloscope
while connected to the device under measurement.

3
IM 701946-01EN
• Do not operate in wet or damp conditions
To prevent electric shock, do not operate the probe in wet or
damp conditions.
• Avoid exposed circuitry
To prevent electric shock, remove metal and jewelry such
as watches and rings. Do not touch exposed connections or
components when power is present on the device.
• Do not operate in explosive atmosphere
To prevent injury or re hazard, do not operate the probe in an
atmosphere of ammable or explosive gases or vapors.
• Do not operate with suspected failures
Stop using the probe If you suspect that the probe is damaged.
Consult your nearest YOKOGAWA dealer.
• Do not operate with a damaged signal cable
If the signal cable is torn and the inner metal is exposed or if
a color di󰀨erent from the outer sheath appears, stop using the
cable.
• Do not disassemble or modify
Do not disassemble or modify the product. YOKOGAWA assumes
no liability if you disassemble or modify the product.
• Observe the maximum input voltage
Do not apply a voltage exceeding the maximum input voltage to
the probe. When the oscilloscope’s input coupling is AC, a DC
voltage is applied to the oscilloscope’s input at the same electric
potential as the probe’s input. Make sure not to exceed the
oscilloscope’s maximum input voltage.
French
AVERTISSEMENT
• But du produit
Le produit est utilisé en association avec un oscilloscope pour
observer et mesurer des signaux électriques. Ne l’utilisez pas à
d’autres ns.
• Mise à la terre de l’instrument de mesure
La borne de terre de protection de l’oscilloscope doit être
connectée à la terre.
• Mise à la terre de la sonde
Assurez-vous de connecter le l de terre ou l’accessoire
équivalent de la sonde au potentiel de mise à la terre.
• Faites attention au choc électrique
N’utilisez jamais la sonde les mains mouillées ou lorsque la
sonde elle-même est mouillée. Cela pourrait provoquer un choc
électrique. Faites attention au choc électrique lorsque vous
connectez la sonde à l’appareil à mesurer. Ne retirez pas la
sonde de l’oscilloscope lorsqu’il est connecté à l’appareil en cours
de mesure.
• N’opérez pas dans des conditions mouillées ou humides
Pour éviter un choc électrique, ne faites pas fonctionner la sonde
dans des conditions mouillées ou humides.

4IM 701946-01EN
• Évitez les circuits exposés
Pour éviter un choc électrique, retirez le métal et les bijoux tels
que les montres et les bagues. Ne touchez pas les connexions ou
composants exposés en présence de courant sur l’appareil.
• N’opérez pas dans une atmosphère explosive
Pour éviter les blessures et les risques d’incendie, n’utilisez pas la
sonde dans une atmosphère de gaz ou des vapeurs inammables
ou explosifs.
• N’opérez pas en cas de défaillances suspectées
Arrêtez d’utiliser la sonde si vous pensez qu’elle est
endommagée. Consultez votre revendeur YOKOGAWA le plus
proche.
• N’opérez pas avec le câble de signal endommagé
Si le câble de signal est coupé et que le métal interne est exposé
ou si une couleur di󰀨érente de la gaine extérieure apparaît,
arrêtez d’utiliser le câble.
• Nedémontezoumodiezpas
Ne démontez ou modiez pas le produit. YOKOGAWA n’assume
aucune responsabilité si vous démontez ou modiez le produit.
• Respectez la tension d’entrée maximale
N’appliquez pas une tension supérieure à la tension d’entrée
maximale sur la sonde. Lorsque le couplage d’entrée de
l’oscilloscope est AC, une tension DC est appliquée à l’entrée
de l’oscilloscope au même potentiel électrique que l’entrée de
la sonde. Assurez-vous de ne pas dépasser la tension d’entrée
maximale de l’oscilloscope.
Regulations and Sales in Various Countries and Regions
Waste Electrical and Electronic Equipment (WEEE)
(EU WEEE Directive valid only in the EEA* and UK WEEE Regulation
in the UK)
This product complies with the WEEE marking requirement. This
marking indicates that you must not discard this electrical/electronic
product in domestic household waste. When disposing of products in
the EEA or UK, contact your local Yokogawa o󰀩ce in the EEA or UK
respectively.
* EEA: European Economic Area
UKCA Marking
This product complies with the UKCA (UK Conformity Assessed)
marking.
Authorized Representative in the EEA (AR)
Yokogawa Europe B.V. is the authorized representative of Yokogawa Test &
Measurement Corporation for this product in the EEA. To contact Yokogawa
Europe B.V., see the separate list of worldwide contacts, PIM 113-01Z2.
Disposal
When disposing of YOKOGAWA products, follow the laws and ordinances of the
country or region where the product will be disposed of.

5
IM 701946-01EN
Overview
Model 701946 is a miniature passive probe with attenuation ratio of 10:1, used
in combination with Yokogawa’s oscilloscopes model DLM2000/DLM4000/
DLM6000 with input impedances of 1 MΩ. The probe is designed for user safety
and ease of use, suitable for measuring high density mounting boards. By
adopting a spring structure for the contact tip, the stress applied on the device
under measurement is minimized. In addition, by using various accessories such
as IC caps, you can easily contact the pins of ne pitch ICs.
Standard Accessories
The 701946 consists of the standard accessories listed below. The number
corresponds to the combination on the next page.
No. Standard Accessories No. Standard Accessories
1. Probe main unit 11. Protection cap*
2. Spring tip (Ø 0.5 mm)* 12. Ground lead
3. Rigid tip (Ø 0.5 mm) 13. Ground spring
4. Pincher tip 14. Ground blade
5. IC cap 0.5 mm pitch (green) 15. Cu sheets (2 x 2 cm) x 2 sheets
6. IC cap 0.65 mm pitch (blue) 16. PCB adapter kit
7. IC cap 0.8 mm pitch (gray) 17. Marker tips (4 colors x 3)
8. IC cap 1.0 mm pitch (brown) 18. Adjustment screwdriver
9. IC cap 1.27 mm pitch (black) 19. Two-footer probe positioner
10. Insulation cap 20. Manuals
* Attached to the probe main unit
Combinations of Accessories
CAUTION
• Use the ground lead only for grounding connections.
• Do not use any accessories other than the standard
accessories.
French
ATTENTION
• Utilisez le l de terre uniquement pour les connexions de mise à
la terre.
• N’utilisez pas d’accessoires autres que les accessoires
standard.

6IM 701946-01EN
11. Protection cap
5. IC cap
0.5 mm pitch
green
18. Adjustment screwdriver
16. PCB adapter kit
1. Probe main unit
(length 1.2 m)
12. Ground lead
(length 15 cm)
13. Ground spring
14. Ground blade
15. Cu pads
(2 x 2 cm) x 2 sheets
DEVICE UNDER
TEST
2. Spring tip
(Ø0.5 mm)
3. Rigid tip
(Ø0.5 mm)
4. Pincher tip
(length 77.6 mm)
6.
0.65 mm pitch
blue
7.
0.8 mm pitch
gray
8.
1.0 mm pitch
brown
9.
1.27 mm pitch
black
17. Marker tip
(4 colors x 3)
green, blue, red, yellow
19. Two-footer positioner
10. Insulation cap
20. Manuals
106.5
15
2.5
87.8
18.6
Ø15.0
Ø9.2
Probe tip (Ø2.5 mm) Probe cable
Adjustment screw
Contact tip
(Ø0.5 mm)
1. Dimensions of probe main unit
Unit : mm
3.5
BNC connector
Probe ID pin

7
IM 701946-01EN
Specications
The specications described in this section may vary depending on the type
of oscilloscope connected. The preconditions for the following specications
are that the instrument should be warmed up for at least 20 minutes and the
environmental conditions should not exceed the specied limits of the probe.
ElectricalSpecications
Attenuation Ratio110 : 1 ±2% @DC
Voltage Coefficient 0.0025%/V (typical value)
System Bandwidth 500 MHz (–3 dB)
Probe Rise Time < 700 ps (10% to 90%) (typical value)
Maximum Input Voltage2400 Vrms
1 This specication value is obtained when the probe is connected to an oscilloscope having an input
resistance of 1 MΩ ±1% and the input voltage is 100 V or less.
2 See the Compliant Standards shown below. See also “Voltage Derating.”
Electrical Characteristics
Input Resistance (system) 10 MΩ ±1%
Input Capacitance (system) 9.5 pF (typical value)
Input Impedance (system) See also “Input Impedance.”
Compensation Range 10 pF to 25 pF (typical value)
Mechanical Characteristics
Weight (probe only) Approximately 48 g
Cable Length Approximately 1.2 m
EnvironmentalSpecications
Altitude Operating: Up to 2000 m
Storage: Up to 15000 m
Temperature Operating: 0 °C to 50 °C
Storage: –40 °C to 71 °C
Maximum Relative Humidity Operating: Relative humidity of 80% at a temperature
of up to 31 °C, decreasing linearly to relative
humidity of 40% at 50 °C if the temperature
is 31 °C or higher.
Compliant Standards
Safety Standards EN 61010-031
Measurement Category “O”1400 Vrms, 1250 V transient
over-voltage
Measurement Category II1300 Vrms
Pollution Degree 22
Environmental Standards3EU RoHS Directive compliant

8IM 701946-01EN
1 The product is for measurement category II (CAT II). Do not use it with measurement category III
(CAT III), nor measurement category IV (CAT IV). When using devices or accessories with di󰀨erent
measurement categories, the lower measurement category applies. See below for denitions of
measurement categories.
2 Pollution degree refers to the degree of adhesion of a solid, liquid, or gas which deteriorates
withstand voltage or surface resistivity. Pollution Degree 2 applies to normal indoor atmospheres
(usually with only non-conductive pollution).
3 For conformity to environmental regulations and/or standards other than EU, contact your nearest
Yokogawa o󰀩ce (PIM 113-01Z2).
DenitionsofMeasurementCategories
Measurement Category “O” (Other) It applies to measurement of a circuit that is not
connected directly to the main power source.
Measurement Category II (CAT II)It applies to measurement of electrical equipment
that is powered through a fixed installation such
as a wall outlet wired to a distribution board and
measurement on such wiring.
Measurement Category III (CAT III) It applies to measurement at the distribution level,
that is, building wiring, fixed installations.
Measurement Category IV (CAT IV) It applies to measurement at the primary supply
level, that is, overhead lines, cable systems.
Voltage Derating
CAUTION
As the frequency of the input signal increases, the maximum
inputvoltageoftheprobedecreases.SeeSpecicationsforthe
appropriate input voltage.
French
ATTENTION
Lorsque la fréquence du signal d’entrée augmente, la tension
d’entréemaximaledelasondediminue.Voirlesspécications
pour la tension d’entrée appropriée.
Frequency [Hz]
Amplitude AC rms [V] sinus
Typical Voltage Derating
0
100
200
300
400
100 k 1 M 10 M 100 M 1
G

9
IM 701946-01EN
Input Impedance
CAUTION
As the frequency of the input signal increases, the input
impedance of the probe decreases.
French
ATTENTION
Lorsque la fréquence du signal d’entrée augmente, l’impédance
d’entrée de la sonde diminue.
Typical Input Impedance
10
100
1
k
10
k
100
k
1
M
10
M
100 M
10 100 1
k 10 k 100 k 1 M 10 M 100 M 1
G
Frequency [Hz]
|Z| [Ω]
Handling
CAUTION
• Since the contact tips are very thin and sharp, handle them with
care.
• Avoid shock to the probe body. Do not bend or pull the cables
excessively. Doing so may damage or disconnect the probe.
French
ATTENTION
• Les pointes de contact étant très nes et pointues, manipulezles
avec precaution.
• Évitez les chocs sur le corps de la sonde. Ne pliez pas et ne tirez
pas les câbles de manière excessive. Cela pourrait endommager
ou déconnecter la sonde.

10 IM 701946-01EN
When measuring signals that contain high frequency components, to reduce the
ringing caused by standard ground lead inductance, it is important to reduce the
length of the ground connection. By attaching one of the included adhesive Cu
pads to the top of the IC, connecting the Cu pad to the ground pin, and installing
the ground blade on the probe, you can minimize the length of the ground
connection.
By using the included IC caps, you can easily make connections to the pins of
ne-pitch ICs. There are ve types of IC caps included. These IC caps have a
pitch ranging from 0.5 mm to 1.27 mm.
Ground blead
Cu pad
To Ground pin
Installing the Pincher Tip
To use the pincher tip, rst install it on the probe so that the pincher tip comes to
the line indicated by the arrow when pulled.
Pincher tip
Probe
Install the pincher tip so that it
comes to this line when pulled.

11
IM 701946-01EN
Phase Adjustment
Connect the probe to the CAL-output on the oscilloscope and turn the phase
adjustment screw with the included adjustment screwdriver to adjust the
observed waveform to a correct square waveform.
Under Compensated
Correct Waveform
Overcompensated
Maintenance
Cleaning
When cleaning the exterior of the probe, clean it using a soft cloth rag moistened
with either water or isopropyl alcohol. In this case, dry the probe completely
before starting the measurement.
Changing the Contact Tip
To change the contact tip, grip the contact tip rmly with pliers and carefully
pull it straight out of its contact socket along the axis of the probe. Do not grip
the white plastic insulator or the housing with pliers, because this will damage
the probe. If the contact tip is removed, the new contact tip can be inserted
with pliers into the socket, along the axis of the probe. To insert the contact
tip completely into the housing, press the contact tip against a hard surface
carefully.
Use pliers to grip and pull the contact
tip carefully out of its contact socket.
Do not grip the white plastic insulator
or the housing with pliers.