![YOKOGAWA 701940 User Manual Download Page 2](http://html1.mh-extra.com/html/yokogawa/701940/701940_user-manual_3436305002.webp)
Specifications
Item
Specifications
Conditions
Probe length
1.5 m
Connector type
BNC
Input resistance
1
10 MΩ ±2%
In conjunction with an oscilloscope with an
input impedance of 1 MΩ ±1%.
Matching Input Capacity (at 10:1)
Approx. 17 pF to 40 pF
Oscilloscope measurement input capacity
Input capacitance
At attenuation ratio of 10:1:
22 pF ±10%
In conjunction with an oscilloscope with an
input impedance of 1 MΩ ±1%.
At attenuation ratio of 1:1:
200 pF max.
Probe only
Attenuation ratio
1
(10:1) ±2% or less
In conjunction with an oscilloscope with an
input impedance of 1 MΩ ±1%.
Bandwidth
At attenuation ratio of 10:1:
10 MHz (-3 dB or less)
Subject to change depending on type of
oscilloscope used.
At attenuation ratio of 1:1:
DC to 6 MHz
(-3 dB or less, typical
2
)
Subject to change depending on type
of oscilloscope used and measurement
conditions.
Rise time
At attenuation ratio of 10:1:
35 ns max.
Subject to change depending on type of
oscilloscope used.
At attenuation ratio of 1:1:
58 ns max. (typical
2
)
Subject to change depending on type of
oscilloscope used and measurement
Max input voltage
1
600 V (DC + AC peak)
or 42 V (DC + AC peak)
This voltage acceptable if the oscilloscope
input is non-isolated (the GND part of the
input has the same electric potential as the
protective grounding), and the attenuation
factor is 10:1. If the attenuation factor is 1:1,
the acceptable voltage is the max. input
voltage on the oscilloscope.
Operating
environment
Temperature range +5°C to +40°C
Humidity range
20% RH to 80% RH
Storage
environment
Temperature range -20°C to +70°C
Humidity range
80% RH or less
Operating altitude
2000 m or less
Safety standard
EN61010-031
Measurement category II,
3
600 V (DC + AC peak)
Pollution degree 2
4
Environmental standard
EN50581 Monitoring and control instrument
1: In case of selecting the attenuation as 10:1. The maximum allowable input decreases depending on
the frequency. Refer to the derating curve.
2: Typical (or average) value; not guaranteed.
3: The measurement category of this instrument is category II. Do not use it to measure the main
power supply or for Measurement Categories III, and IV.
Measurement category II applies to measurement of circuits, such as household electric appliances
and portable electric tools, that are connected to low-voltage installations.
Measurement category III applies to measurement of facility circuits, such as distribution boards
and circuit breakers.
Measurement category IV applies to measurement of power source circuits, such as entrance
cables to buildings and cable systems, for low-voltage installations.
4: Pollution Degree: Applies 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 (with
only non-conductive pollution).
WARNING
• The maximum input voltage for isolated input is more strictly limited than for non-isolated
input. This is due to the fact that, unlike non-isolated input in which GND is protected by
a protective grounding potential, the GND for isolated input is floating (insulated), so any
protection via protective grounding is disabled.
• When using this probe for isolated input, you must use it with 42 V or less for both the
H and L sides. In particular, the GND shell has exposed metal so there is a high risk of
electric shock. Even when a high potential only exists on the H side, high voltage can still
occur on the L side creating a very dangerous condition.
• Even when the voltage of the non-isolated input is within the maximum, to ensure that
current flows to the protective grounding circuit the protective grounding (from the power
supply’s 3-prong terminal) of the main unit must be enabled, and for plug-in modules, the
module attachement screws must be securely fastened.
• This probe has a 10:1 - 1:1 switch. Be sure to heed the following cautions when switching
the probe.
• Confirm the oscilloscope’s maximum input voltage when switching the probe to 1:1.
Accidentally introducing excessive input can damage the input section.
• Do not switch the probe while voltage is being input. This is extremely hazardous.
French
AVERTISSEMENT
• La tension d’entrée maximum pour une entrée isolée est strictement plus limitée que pour
une entrée non isolée. Ceci est dû au fait que, contrairement à une entrée non isolée
dans laquelle le GND est protégé par un potentiel protecteur de mise à la terre, le GND
pour une entrée isolée est flottant (isolé), désactivant ainsi tout protection via une mise à
la terre protectrice.
• Lors de l’utilisation de cette sonde pour une entrée isolée, vous devez l’utiliser en 42
V ou moins pour les côtés H et L. En particulier, la coque GND possède des parties
métalliques exposées, d’où un risque de choc électrique élevé. Même lorsqu’un potentiel
élevé existe uniquement sur le côté H, une haute tension peut tout de même être
présente sur le côté L, créant ainsi une condition très dangereuse.
• Même lorsque la tension de l’entrée non isolée ne dépasse pas le maximum, afin de
s’assurer que le courant passe jusqu’au circuit protecteur de mise à la terre, la mise à la
terre protectrice (du terminal à 3 broches de l’alimentation électrique) de l’unité principale
doit être activée, et pour les modules enfichables, les vis de fixation du module doivent
être bien serrées.
• Cette sonde possède un commutateur 10:1 - 1:1. S’assurer de respecter les précautions
suivantes lors de l’allumage de la sonde.
• Confirmer la tension d’entrée maximum de l’oscilloscope lors de l’allumage de la
sonde sur 1:1. Introduire accidentellement une entrée trop élevée peut endommager
la section d’entrée.
• Ne pas allumer la sonde au moment de la mise sous tension. Ceci est extrêmement
dangereux.
Max Input Voltage derating curve
Voltage (V)
Frequency (MHz)
10
100
1000
0.1
1
10
IM 701940-01E 2/2
Operation
Use adequate attachment suitable for the point to measure. Before using the probe with attenuation
ratio of 10:1, adjust its capacitance by tuning the trimmer.
The attenuation can be selected using the 10:1 - 1:1 switch.
Make sure the maximum input voltage of oscilloscope when the attenuation is selected as 1:1.
Adjustment
1.
Connect the probe connector to the input of the oscilloscope, and connect the tip of the probe to
the CAL signal output terminal.
2.
Change the Time/Div and the V/Div to get the display shown below. And tune the trimmer to get
the correct waveform.
Over Compensation
Inadequate
Compensation
Correct Waveform