Waste Electrical and Electronic Equipment
Waste Electrical and Electronic Equipment
(This directive is valid only in the EU.)
This product complies with the WEEE directive marking requirement. This marking
indicates that you must not discard this electrical/electronic product in domestic
household waste.
Product Category
With reference to the equipment types in the WEEE directive, this product is classified
as a “Monitoring and control instruments” product.
Do not dispose in domestic household waste. When disposing products in the EU,
contact your local Yokogawa Europe B. V. office.
Authorized Representative in the EEA
Yokogawa Europe B.V. is the authorized representative of Yokogawa Meters & Instruments Corporation
for this product in the EEA. To contact Yokogawa Europe B. V., see the separate list of worldwide
contacts, PIM 113-01Z2.
Measurement Category
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various
electrical environments, categorized as O to IV, and called measurement categories.
Measurement category O (Other)
Applies to measurement of circuits that are not directly connected to a main power source. This
category applies to measurement of secondary electric circuits in equipment across a transformer.
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.
Component Names
Transformer jaw
Barrier
Trigger
Cable
Output connector
Specifications
Measurable conductor size
720930: Max. φ18 mm, 720931: Max. φ30 mm
Measuring range
720930: AC 0 to 50 Arms,
720931: AC 0 to 200 Arms (300 Apeak)
Output voltage
720930: AC 0 to 500 mVrms (10 mV/A)
720931: AC 0 to 500 mVrms (2.5 mV/A)
Accuracy
(sine wave input)
Bandwidth
720930
±0.5%rdg±0.1 mV (50/60Hz)
±0.8%rdg±0.2 mV (40 Hz to 1 kHz)
±1.0%rdg±0.4 mV (1 kHz to 3.5 kHz)
720931
±0.5%rdg±0.1 mV (50/60 Hz)
±0.8%rdg±0.2 mV (40 Hz to 1 kHz)
±1.0%rdg±0.4 mV (1 kHz to 3.5 kHz)
Phase
720930: Within ±2.0 deg (0.5 to 50 A, 40 Hz to 3.5 kHz)
720931: Within ±1.0° deg (2 to 200 A, 40 Hz to 3.5 kHz)
Accuracy-guaranteed temperature
and humidity
23±5°C, Humidity: 85%RH or less (no condensation)
Rated voltage between circuit and
ground
720930: AC 300 Vrms max.
720931: AC 600 Vrms max.
Operating temperature & humidity
range
0 to 50°C, 85%RH or less (no condensation)
Storage temperature & humidity
range
-20 to 60°C, 90%RH or less (no condensation)
Temperature coefficient
0.05% f.s./°C (0 to 50°C)
Maximum allowable input
720930: AC 130 Arms continuous (50/60 Hz)
720931: AC 250 Arms continuous (50/60 Hz)
Influence of the conductor location 720930: Within ±0.5% rdg (1 to 50 A, 45 Hz to 1 kHz)
720931: Within ±0.5% rdg (20 to 200 A, 45 Hz to 1 kHz)
Influence of the external magnetic
field
720930: Equivalent to 0.1 A or less (400 A/m, 50/60 Hz)
720931: Equivalent to 0.1 A or less (400 A/m, 50/60 Hz)
Output impedance
720930: Approx. 18 Ω, 720931: Approx. 6 Ω
Withstand voltage
720930
AC 3.7 kVrms / 1 minute
Between jaw and case, case and output terminal, output terminal and jaw.
720931
AC 5.4 kVrms / 1 minute
Between jaw and case, case and output terminal, output terminal and jaw.
Environmental conditions
Altitude up to 2000 m, in-door use
Recommended calibration period 1 year
External dimensions
720930: 52 (W) × 106 (H) × 25 (D) mm (excluding protrusions)
720931: 73 (W) × 130 (H) × 30 (D) mm (excluding protrusions)
Cable length
Approx. 2.8 m
Output terminal
BNC connector (isolated)
Weight
720930: Approx. 210 g, 720931: Approx. 280 g
Standard accessories
Instruction manual, cable marker
Safety standards
Compliant standards: EN 61010-1, EN 61010-2-032
Measurement category
720930:
Measurement category III (rated voltage between
circuit and ground: 300 Vrms)
Measurement category IV (rated voltage between
circuit and ground: 150 Vrms)
720931:
Measurement category III (rated voltage between
circuit and ground: 600 Vrms)
Measurement category IV (rated voltage between
circuit and ground: 300 Vrms)
Pollution degree 2
*
EMC standards
Compliant standard: EN 61326-1
Influence in the immunity testing environment (criteria A)
720930:
Equivalent to 10 A or less
720931:
Equivalent to 40 A or less
Environmental standards
Compliant standard: EN 50581 Monitoring and control instruments
including industrial monitoring and control instruments
* Pollution Degree applies to the degree of adhesion of a solid, liquid, or gas that deteriorates
withstand voltage or surface resistivity. Pollution degree 2 applies to normal indoor atmospheres
(with only non-conductive pollution).
External Dimensions
52
Ø30
720930
720931
106
25
Ø18
130
73
Unless otherwise specified, tolerances are ±3% (however, tolerances are ±0.3 mm when below 10 mm).
Unit: mm
30
2880
±60
2880
±60
Measurement
WARNING
The transformer jaws are made of metal and their tips are not completely
insulated. Be especially careful about the possible shorting where the measured
object has exposed metal parts.
CAUTION
• Take sufficient care to avoid shock, vibration, or excessive force when handling
the instrument. Otherwise, the precisely adjusted transformer jaws will be
damaged.
• When transformer jaws do not fully close, never try to close them by force, but
make them free to move and try again. If a foreign substance is stuck in the jaw
tips, remove it.
• When making current measurements, keep the transformer jaws fully closed.
Otherwise, accurate measurements cannot be taken.
Maximum conductor size is as follows.
720930: 18 mm in diameter
720931: 30 mm in diameter
• Hold the inserting part (not the cable), and disconnect the output connector
from the measuring instrument so as not to break the cord.
French
AVERTISSEMENT
Les mâchoires du transformateur sont composées de métal et leurs embouts ne
sont pas totalement isolés. Il faut être particulièrement attentif à un éventuel court-
circuit là où l'objet mesuré possède des parties métalliques exposées.
ATTENTION
• Procéder avec suffisamment de soin pour éviter les chocs, les vibrations ou
une force excessive lors de la manipulation de l'instrument. Si cette condition
n'est pas respectée, les mâchoires du transformateur ajustées avec précision
seront endommagées.
• Si les mâchoires du transformateur ne ferment pas totalement, ne jamais
essayer de les fermer en forçant, mais les laisser libres et réessayer. Si une
substance étrangère est bloquée dans les extrémités de la mâchoire, la retirer.
• Lors de la prise de mesures d'intensité, maintenir les mâchoires du
transformateur entièrement fermées. Si cette condition n'est pas respectée, il
est impossible d'effectuer des mesures précises.
La taille maximale du conducteur est la suivante.
Modèle 720930: 18 mm de diamètre
Modèle 720931: 30 mm de diamètre.
• Maintenir la partie d'insertion (excepté pour le câble) et débrancher le
connecteur de sortie de l'instrument de mesure afin de ne pas entraîner une
rupture au niveau du cordon.
Measurement procedures
1.
Connect the output connector to the Input terminal of the measuring instrument.
2.
Press the trigger to open the transformer jaws and clamp onto one conductor. The measured
conductor shall be at the center of the jaws.
When connecting a sensor with a power meter, match the arrow mark (power source to
load), which is indicated on the transformer jaws, with the current flowing direction in order to
synchronize the phases of measured current and output voltage.
3.
Ensure that the tips of transformer jaws are firmly closed.
Current direction arrow
Conductor
Power source
Load
Disposing of the Instrument
When disposing of this instrument, follow the laws and ordinances of the country or region where the
product will be disposed of.
IM 720930-01EN 2/2
nbn Elektronik Handelsgesellschaft m. b. H.
Riesstraße 146, 8010 Graz
www.nbn.at
Tel. +43 316 40 28 05 | Fax +43 316 40 25 06
Vertrieb für Österreich :
