IM 701921-01E 2/2
1 Description
By using this device, oscilloscopes with single-ended input can be easily used as oscilloscopes with
differential inputs.
2 Appearance
25 cm
90 cm
ADJUST (DC offset adjustment)
Standard Parts
Parts No
Attenuation switch
Power switch
* Power can be supplied from the YOKOGAWA
measuring instrument or 700938, 701934.
1 Probe
2 Pinchers tips
3 Ground extention lead
(length = 100 cm)
4 Power cable*
(length = 150 cm)
-
Black: B9852MM
Red: B9852MN
-
B9852MJ
1
2
3
4
Auxiliary
grounding
terminal
3 Installing/Replacing the Batteries
Shift the lid at the back side of the probe and install/replace the four dry cells. The dry cells are not
installed on receipt of the instrument.
4 Operation
1.
Install four AA cells. When using an external power supply, do not install the dry cells. Supply
power only through the external power supply.
2.
Simply plug-in the BNC output connector to the vertical input of a oscilloscope, and connect the
auxiliary grounding terminal to a proper ground. If necessary, use a ground extention lead.
3.
Select the proper range setting. For higher resolution and less noise when measuring signals
below 70 V, switch the attenuation to 1/10. Otherwise, set the attenuation to 1/100 when
measuring signals above 70 V.
4.
If the offset voltage is large, short the top of input leads, and turn the ADJUST variable resistor (DC
voltage adjustment) using a flat-head screwdriver to adjust the offset voltage.
5.
Connect the input to the circuits under measurement.
WARNING
• To protect against electric shock the ground side of the output cable (the shielded side of
the BNC connector) must be grounded.
• Make sure to avoid an electric shock when connecting the probe to the object of
measurement. Do not remove the probe from the measuring instrument after the object
of measurement is connected.
• When disconnecting the probe BNC output connector, first turn OFF the power to the
circuit under measurement. Then, disconnect the probe from the high voltage parts of the
circuit under measurement.
• When replacing batteries or connecting an external power supply, first turn OFF the
power to the circuit under measurement. Then, remove the input lead from the circuit
under measurement.
CAUTION
• This probe is to carry out differential measurement between two points on the circuit
under measurement. This probe is not for electrically insulating the circuit under
measurement and the measuring instrument.
• Use a soft cloth to clean the dirt. Prevent damage to the probe. Avoid immersing the
probe, using abrasive cleaners, and using chemicals contains benzene or similar
solvents.
French
AVERTISSEMENT
• Pour éviter les chocs électriques, la mise à la terre du câble de sortie (côté blindé du
connecteur BNC) doit être effectuée.
• S’assurer d’éviter un choc électrique lors de la connexion de la sonde à l’objet de la
mesure. Ne pas retirer la sonde de l’instrument de mesure après avoir connecté l’objet
de la mesure.
• Lors de la déconnexion du connecteur de sortie BNC de la sonde, mettre d’abord HORS
tension le circuit faisant l’objet de la mesure. Puis déconnecter la sonde des parties à
haute tension du circuit faisant l’objet de la mesure.
• Lors du remplacement des piles ou de la connexion d’une alimentation externe, coupez
d’abord l’alimentation du circuit sous tension. Ensuite, retirez le câble d’entrée du circuit
à mesurer.
ATTENTION
• Cette sonde doit effectuer une mesure différentielle entre deux points sur le circuit à
mesurer.Cette sonde n’est pas destinée à isoler électriquement le circuit à mesurer et
l’instrument de mesure.
• Utiliser un chiffon doux pour nettoyer la sonde. Faire attention de ne pas casser la sonde.
Ne pas immerger la sonde dans un liquide ni utiliser de nettoyants abrasifs sur la sonde.
Ne pas utiliser de benzène ni d’autres solvants sur la sonde.
Note
• Connect the BNC connector to the input terminal of the oscilloscope and for two point
measurement (differential measurement), connect both input leads. Because the performance
declines in case you carry out measurements with only one input lead connected, make sure to
always connect both.
• Accurate measurement may not be possible near objects with strong electric fields (such as
cordless equipment, transformers, or circuits with large currents).
• Before use, flip the attenuation switch back and forth several times. The switch’s electrical
contacts can weaken if not used for long periods of time.
• To take accurate measurements, we recommend that you calibrate the probe once a year.
5 Specifications
Item
Specifications
Frequency bandwidth
1, 2
DC to 100 MHz (−3 dB)
Input type
Balancing difference input
Attenuation ratio
switched ratios of 10:1 and 100:1
Output offset voltage
2, 3
±7.5 mV (value after the ADJUST variable resistor is adjusted)
Input resistance/capacity
4
4 MΩ/13 pF each side to ground
Differential allowable voltage
(b − terminal)
At 10:1 attenuation, ±70 V (DC + ACpeak)
At 100:1 attenuation, ±700 V (DC + ACpeak)
Max common mode voltage
±700 V (DC + ACpeak)
Max input voltage(to ground)
5
±1000 V (DC + ACpeak)
CMRR (typical)
1, 4
60 Hz: less than −80 dB; 20 kHz: less than −60 dB
Output voltage
1, 2
±7 V (DC or ACpeak)
Value when the probe is used in combination with a measuring
instrument whose input resistance is 50 kΩ or higher
Output impedance
Using 1 MΩ input system oscilloscope
Gain accuracy
1, 2, 3
Attenuation
10:1
100:1
Common mode
voltage
≤ 50 V and ≥ −50 V
±2%
±2%
> 50 V or < −50 V
±3%
Operating environment
5 to 40°C, 25 to 85% (no condensation)
Storage environment
−30 to 60°C, 25 to 85% (no condensation)
Operating altitude
2000 m or less
Operating altitude
3000 m or less
Power requirements
6
Internal battery: four dry cells (AA, R6)
External power supply: 6 VDC/200 mA or more, or 9 VDC/150 mA
or more, with a positive center pin.
Power is supplied through the dedicated cable B9852MJ from
a YOKOGAWA measuring instrument's probe power supply
terminal or from a 700938 or 701934 probe power supply.
Cell life time
In continuous duty, approx. 7 hours (when using the alkali dry cells)
Warm-up time
At least 30 minutes
Dimensions
207 mm × 83 mm × 38 mm (excluding connector and cable)
Weight
Approx. 530 g ( excluding the dry cells)
Withstanding voltage
2000 VACrms (between input terminal and BNC-ground), for 5
minutes
Safety standards
Complying
standards
EN61010-031
Measurement category III
7
: 700 V (DC + ACpeak)
Pollution degree 2
8
Emission
Complying
standards
EN61326-1 Class A
EN55011 Class A, Group 1
EMC standards of Australia and New Zealand
EN55011 Class A, Group 1
This product is a Class A (for industrial environment)
product. Operation of this product in a residential area
may cause radio interference in which case the user
is required to correct the interference.
Immunity
Complying
standards
EN61326-1 Table 1
1 When the power supply voltage from the dry cells is 5 V or more, or when using an external power supply.
2 Ambient temperature 23±5°C, humidity 55% ± 10% RH, 30 minutes after the power is turned on.
3 The accuracy is the total of the gain accuracy and offset voltage.
4 Typical values are typical or mean values. They are not strictly guaranteed.
5 Frequency derating (load reduction) applies.
Input voltage derating
Frequency (Hz)
0.1 M
10
100
18 V
1000
1 M
10 M
100 M
Max input voltage (V)
6 When the capacity of dry cells goes down LED blinks. In such a case, replace the dry cells.
Also, do not install the dry cells when using an external power supply.
7 This equipment is for measurement category III (CAT III). Do not use it with measurement category IV (CAT
IV). CAT III applies to measurement of the distribution level, that is , building wiring, fixed installations. CAT IV
applies to measurement of the primary supply level, that is, overhead lines, cable systems, and so on.
8 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).
