B&K Precision Corporation
22820 Savi Ranch Parkway, Yorba Linda, CA 92887
Tel: 714-921-9095, Fax: 714-921-6422
www.bkprecision.com
Specifications subject to change without notice
Data Sheet
Model 307A
Analog Insulation &
Continuity Meter
Analog Insulation &
Continuity Meter
Model 307A
This insulation tester 307A is intended primarily for periodic testing of
industrial motors, transformers, electrical wiring, and cable insulation for
signs of deterioration. Low readings may indicate impending failure
allowing for permit replacement of suspect component during routine
maintenance rather than risking component failure. It is also useful for
safety testing of TV sets and appliances to assure no hazardous leakage
current. The voltage and resistance ratings for insulation testing are
often specified for the product to be tested.
Features
■ Test insulation to 400MΩ
■ Selectable 250V, 500V, or 1000V insulation test
■ Low ohm resistance test ranges 500ohm & 3ohm
■ 200mA Short circuit test
■ Extra rugged integral carrying case
■ Locking switch for extended testing
■ Live circuit indicator warns of safety hazard
■ Volt meter to 600Vac
■ Battery test feature
■ Overload protection
■ IEC 1010-1 Cat III 600V / CE
Applications
Why Test is Necessary?
• Insulation
Every electrical apparatus and installation needs to be safe for the user and for
the equipment itself.
Electrical conductors of electricity needs to be insulated from each other, so
that they do not create electrical hazard or unnecessary consumption.
Poorly insulated circuits can create leakage current which can be dangerous
and trip your GFCI, RCCB or ELCB.
Each country regulates levels at which the insulation levels are acceptable.
Generally, Insulation resistance measurement should be done between each
conductor and the earth, and between each conductors.
• Continuity
Checking the continuity of wires, complete circuits, connections, closure of
contacts, circuit breakers, fuses, bounding resistance of connections, etc... are
all very important to ensure wire integrity.
