
Introduction
9322
DIFFERENTIAL PROBE
Instruction Manual
Feb. 2021 Revised edition 14
9322A981-14 21-02H
EN
Warranty
Warranty malfunctions occurring under conditions of normal
use in conformity with the Instruction Manual and Product
Precautionary Markings will be repaired free of charge. This
warranty is valid for a period of three (3) year from the date of
purchase. Please contact the distributor from which you purchased the product for further information on warranty provisions.
Thank you for purchasing the HIOKI Model 9322 DIFFERENTIAL PROBE. To obtain maximum performance from the device, please read this manual first, and keep it handy for future
reference.
Overview
The 9322 is a differential probe that connects to input of 8800
series Memory HiCorder input unit. After high voltage is input to
H and L terminal and divided by 1/1000, the difference is output
as signal to GND.
Inspection and Maintenance
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. If damage is evident, or if
it fails to operate according to the specifications, contact your
dealer or Hioki representative.
Confirming package contents
• 9322 Differential Probe...1
• Alligator clip....................1 set (Red/Black)
• L9243 Grabber Clip........1 set (Red/Black)
• C0203 Carrying Case.....1
• Instruction manual..........1
Preliminary Checks
• Before using the device the first time, verify that it operates
normally to ensure that the no damage occurred during storage or shipping. If you find any damage, contact your dealer
or Hioki representative.
• Before using the device, make sure that the insulation on the
probes is undamaged and that no bare conductors are
improperly exposed. Using the device in such conditions
could cause an electric shock, so contact your dealer or Hioki
representative for repair.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.
• If the device seems to be malfunctioning, contact your dealer
or Hioki representative.
• Pack the device so that it will not sustain damage during
shipping, and include a description of existing damage. We
cannot accept responsibility for damage incurred during shipping.
Safety
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions.
This device is designed to comply with IEC 61010
Safety Standards, and has been thoroughly tested for
safety prior to shipment. However, mishandling during
use could result in injury or death, as well as damage
to the device. Be certain that you understand the
instructions and precautions in the manual before use.
We disclaim any responsibility for accidents or injuries
not resulting directly from device defects.
Safety Symbol
In the manual, the symbol indicates particularly important information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates that dangerous voltage may be present at this
terminal.
Indicates AC (Alternating Current).
Indicates DC (Direct Current).
Indicates a grounding terminal.
The following symbols in this manual indicate the relative importance of cautions and warnings.
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or correct operation of the device.
Measurement categories
This device complies with CAT II, CAT III safety requirements.
To ensure safe operation of measurement devices, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories. These
are defined as follows.
CAT II: Primary electrical circuits in equipment connected
to an AC electrical outlet by a
power cord (portable tools,
household appliances, etc.).
CAT II covers directly measuring electrical outlet receptacles.
CAT III: Primary electrical circuits of heavy equipment
(fixed installations) connected directly to the distribution panel, and
feeders from the distribution panel to outlets.
CAT IV: The circuit from the service drop to the service entrance, and
to the power meter and primary overcurrent protection device (distribution panel).
Using a measurement device in an environment designated with a
higher-numbered category than that for which the device is rated
could result in a severe accident, and must be carefully avoided.
Use of a measurement instrument that is not CAT-rated in CAT II to
CAT IV measurement applications could result in a severe accident,
and must be carefully avoided.
Usage Notes
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Note the following maximum input voltage and maximum rated voltage to earth. If their voltages are
exceeded, this device will be damaged and personal
injury will result. Therefore, do not perform measurement in this case.
• Maximum input voltage
2000 V DC, 1000 V AC
• Maximum rated voltage to earth
When using the L9243 Grabber clip:
(CAT II) 1000 V AC/DC
When using the Alligator clip:
(CAT II) 1000 V AC/DC, (CAT III) 600 V AC/DC
• Do not allow the device to get wet, and do not take
measurements with wet hands. This may cause an
electric shock.
• To avoid shock and short circuits, turn off all power
before connecting probes.
• The 9322 input part is applied with high voltage. To
avoid electric accident, be sure to turn off the power of
equipment to be measured before connecting. After
connection is properly handled, turn the power on.
• Do not store or use the device where it could be exposed to
direct sunlight, high temperature or humidity, or condensation. Under such conditions, the device may be damaged
and insulation may deteriorate so that it no longer meets
specifications.
• This device is not designed to be entirely water- or dust-proof.
Do not use it in an especially dusty environment, nor where it
might be splashed with liquid. This may cause damage.
• To avoid damage to the device, protect it from physical shock
when transporting and handling. Be especially careful to
avoid physical shock from dropping.
• To prevent an electric shock accident, confirm that the white or
red portion (insulation layer) inside the cable is not exposed. If
a color inside the cable is exposed, do not use the cable.
This product may cause interference if used in residential areas. Such
use must be avoided unless the user takes special measures to reduce
electromagnetic emissions to prevent interference to the reception of
radio and television broadcasts.
Specifications
Accuracy guaranteed for one year at 23±5°C (73±9°F), 35 to 80%RH,
after 30 minutes or more of warming-up time
Guaranteed accuracy period: 1 year
Guaranteed accuracy period after adjustment made by Hioki: 1 year
Product warranty period 3 years
Maximum input voltage 2000 V DC, 1000 V AC
Maximum rated voltage
to earth
Attenuation ratio 1000:1
Output BNC terminal (DC/AC/RMS output)
DC output
Amplitude accuracy
Frequency characteristic
RMS output
Amplitude accuracy
Frequency characteristic
Response speed
AC output
Frequency characteristic
Common mode
rejection ratio
Temperature
characteristic
Input resistance 9 M
Operating temperature
& humidity
Storage temperature
& humidity
Operating environment Indoors, Pollution degree 2, altitude up to
Effect of radiated radiofrequency electromagnetic field
Effect of conducted
radio-frequency electromagnetic field
Applicable Standards
Safety EN 61010
EMC EN 61326 Class A
Dimensions and mass Approx. 70W x 150H x 25D mm (2.76”W x
L9243 Grabber Clip:1000 V AC/DC (CAT ll)
Alligator clip :1000 V AC/DC (CAT ll),
±1%f.s (1000 V DC max.), ±3%f.s (2000 V
DC max.) f.s. = 2000 VDC
DC to 10 MHz (±3 dB)
±1%f.s. (DC, 40 Hz to 1 kHz), ±4%f.s. (1 kHz
to 100 kHz) f.s. = 1000 V AC
DC, 40 Hz to 100 kHz
200 ms max. (400 V AC)
1 kHz to 10 MHz
(±3 dB, low cut-off frequency 1 kHz±300 Hz)
10000 :1 or more (50/60 Hz, input shorted,
1000 :1 or more (100 kHz, 1 MHz, input
1 mV/°C max. (output)
4.5 MΩ±2%, 20 pF max. (between H, L and
main unit)
0 to 40°C (32 to 104°F), 35 to 80% RH
(no condensation)
-10 to 50°C (14 to 122°F), 20 to 90% RH
(no condensation)
2000 m (6562-ft.)
Within ±5%f.s. at 3 V/m
Within ±5%f.s. at 3 V
5.91”H x 0.98”D), Approx.350 g (12.3 oz.)
Input:output)
shorted, Input:output)
Ω±2%, 10 pF max. (between H and L)
600 V AC/DC (CAT lll)
Anticipated Transient
Overvoltage: 6000 V

Power supply +5 V to +12 V 300 mA max.
Output connector to be connected to the BNC connector
of the input unit.
Maximum rated voltage to earth:
1000 V (CAT ll), 600 V (CAT lll)
When power is supplied,
indicator turns on.
Selects output from DC/AC/RMS.
Connect the optional adapter or
power cord.
• 9418-15 AC Adapter
• 9248 Power Cord
• 9324 Power Cord
• 9325 Power Cord
• 9328 Power Cord
Indicator
Output Switch
Input leads
BNC Connector
Power Jack
Connects alligator clips or
L9243 Grabber Clip.
• Alligator clips
Maximum rated voltage to earth:
1000 V (CAT ll)
• L9243 Grabber Clip
1
Depending on the usage, the AC adapter and power cord
to use for the connection may be different.
Connect the optional AC adapter or power cord
to the power jack.
1
Power cord
Power jack
(When power is supplied,
indicator turns on.)
(example:
9324 Power Cord)
9322
BNC connector
grooves
Lock
Connect the BNC connector to the input unit of the
Memory HiCorder.
Connector
guide of the
Input unit
2
Connect
Engage the BNC connector
grooves with the connectorguide projections, and turn the
connector clockwise to lock
the components.
Remove
Turn the connector counterclockwise and pull it out.
When power is supplied from
a commercial power source:
Connect the 9418-15 AC
Adapter.
When power is supplied from
the input units of the Z5021
Probe Power Unit.
Connect the 9248 Power Cord.
2
2
1
4
3
6
Connect to the waveform recorder
Power supply
Connect to the line
to be measured
Connect to the object and then perform measurement.
6
Set up input range scaling.
(Use the Memory HiCorder main unit to set up.)
5
See "About input range scaling" for details.
Select the output using the output switch.
4
DC
After each H and L terminal signal is divided into
voltage by 1/1000, the difference is output as
signal to GND.
AC
By converting DC signal to AC, impulse voltage is
sampled on carrier voltage.
RMS
Applies RMS conversion on DC output signal and
outputs as level change.
How to supply power from the Memory HiCorder to the 9322
To use 9325 Power Cord (8940 F/V UNIT), use appropriate units with versions listed below.
Contact your dealer or HIOKI representative for details.
(Model 8835: No power available from sensor connector terminal)
*1: Discontinued product
*2: Product of which production will be discontinued
*3: The number of the connectable 9322 varies depending on devices, such as Clamp on Probes, connected to the 9687 Probe Power Unit.
*4: Connecting the Z5021 Probe Power Unit, 8971 Current Unit, or U8977 3CH Current Unit reduces the number of connectable devices,
which include Current Sensors, to up to nine.
To avoid an electric shock, use a grounded 2-pole outlet and the accessory power cord.
Model 8826 : After Ver.2.30 (Unit No.1999-0338386)
Model 8841, 8842 : After Ver.2.31
Model 8835-01 : After Ver.1.10, 9540-01 Install model after Ver.5.10
Model 8860, 8861, 8860-50, 8861-50 : After Ver.1.00
Logic terminal of instrument
Sensor connector terminal of 8940 F/V Unit
*1
9687 Probe Power Unit for the
8860 series only
*2
Z5021 Probe Power Unit for
the MR6000 series only
Memory
HiCorder
Power code
required
Max. mumber of
the connectable
9322
Number of logic
probes avail-
able concur-
rently
Power code
required
Max. mumber
of the
connectable
9322
Number of
logic probes
available
concurrently
with clamp
sensor
Power code
required
Max. mumber
of the
connectable
9322
Power code
required
Max. mumber
of the
connectable
9322
MR6000
MR6000-01
- - - -----9248
8
*4
8870
*1
MR8870
MR8880
No power available from logic terminal-------
MR8875No power available from logic terminal-------
8860
*1
8860-50
*1
8861
*1
8861-50
*1
9323
*2
+ 9324
*1
2
9322 × 2: N/A
9322 × 1: 3
9325
*2
6 8 9248
8
*3
--
8855
*1
9323
*2
+ 9324
*1
2
9322 × 2: N/A
9322 × 1: 3
-------
8847
*1
MR8847-01
*1
MR8847-02
*1
MR8847-03
*1
MR8847-51
MR8847-52
MR8847-53
MR8827
MR8740
MR8741
9323
*2
+ 9324
*1
4
9322 × 4: N/A
9322 × 3: N/A
9322 × 2: N/A
9322 × 1: 2
-------
8841
*1
8842
*1
9324
*1
1N/A
9325
*2
64----
8835
*1
9324
*1
1N/A
No power available from Sensor connector terminal
----
8835-01
*1
9324
*1
1N/A
9325
*2
44----
8826
*1
9324
*1
4
9322 × 4: N/A
9322 × 3: 4
9322 × 2: 6
9322 × 1: 7
9325
*2
66----
9322 only Total: 8
Including with 3273 Total: 8
Including with 3273-50, 3274 and 3276 Total: 6
Including with 3275 Total: 5
Connect the alligator clip or L9243 Grabber Clip to
the input leads.
Use either one of them, depending on the object to measure.
3
DC jack: φ5.5 x 2.1 mm
Accessories • Alligator clips: 1 set (Red/Black)
Options
*4
• Supplied from the 9418-15 AC Adapter
• Supplied from the 9687 Probe Power Unit
with the 9248 Power Cord.
• Supplied from the Z5021 Probe Power Unit
with the 9248 Power Cord.
• Supplied from the logic connector of the
main unit with the 9324 Power Cord.
• Supplied from the sensor connector of the 8940
F/V Unit with the 9325 Power Cord .
*1
*2
• Supplied from the power terminal of the 8950
Analog Unit, 8952 RMS/DC Unit, 8953/
8953-10 High Resolution Unit, or 8955 F/V
Unit with the 9328 Power Cord
• L9243 Grabber Clip: 1 set (Red/Black)
1000 V AC/DC (CAT ll)
• C0203 Carrying Case
• Instruction Manual
• 9418-15 AC Adapter
• 9248 Power Cord (for the 9687, Z5021)
• 9324 Power Cord
*3
Using Method
To avoid an electric shock, use a grounded 2-pole outlet and the accessory power cord to supply power from
the Memory Hicorder or its options to the 9322.
• When disconnecting the BNC connector, be sure to release
the lock before pulling off the connector. Forcibly pulling the
connector without releasing the lock, or pulling on the cable,
can damage the connector.
• To prevent damage to the instrument and device, turn off
the power to all devices before plugging or unplugging any
cables or peripherals.
(for the logic connector)
• 9325 Power Cord
(for the sensor connector of the 8940)
*1: The number of the connectable device varies depending on the
Memory HiCorder used.
Use the 9324 to connect the device to the large logic-connector.
Use both of the 9324 and 9323 to connect the device to the small
logic-connector.
*2: The number of the connectable device varies depending on the
Memory HiCorder used.
*3: Discontinued product
*4: The following options are available for the instrument. To purchase
an option, please contact your authorized Hioki distributor or
reseller. Options are subject to change.
Please check Hioki’s website for the latest information.
Parts Names
• 9328 Power Cord
(for the 8950, 8952, 8953, 8953-10, 8955)
• 9243 Grabber Clip
1000 V AC/DC (CAT ll)
• L9243 Grabber Clip
1000 V AC/DC (CAT ll)
• 3853 Carrying Case
• C0203 Carrying Case
.