ES601Plus OPERATING MANUAL
Kelvin Cable
The Kelvin Cable (CAT I) is used to measure the Protective Earth Resistance, using either a 1A DC current or
a 25A AC current (optional). The voltage present at these terminals is low, but the 25A AC current can present
a potential hazard if used incorrectly. Consult the Operating Manual for the proper operation of the Protective
Earth Resistance test.
DO NOT EXCEED THE FOLLOWING CURRENT LOAD ON THE D.U.T .
RECEPTACLE:
15AMPS @ 100 - 120 VAC, 60 Hz (in 20A circuit)
11AMPS @ 100 - 120 VAC, 60 Hz (in 15A circuit)
12AMPS @ 230 VAC, 50 Hz (in 16A circuit)
The regulatory requirements for loading a circuit (cct.) in a power distribution system sets a current limit on any
individual receptacle to 80% of the value of the circuit breaker on that circuit. For instance, in a circuit with a 15A
circuit breaker (or fuse), the maximum current allowed to be drawn from any individual receptacle is 12A.
Allowing 1A for the ES601Plus circuitry, the load current for the Device Under Test (D.U.T.) should not exceed
11A. These limits are set by the Electrical Code in most jurisdictions in an attempt to avoid unexpected circuit
overloads and subsequent circuit failure. If the D.U.T. load is expected to approach the maximum value on a
routine basis, it is recommended that a circuit with only a single receptacle be provided for use with ES601Plus.
WARNING: OPENING THE ES601Plus MAY COMPROMISE USER SAFETY.
REFER SERVICING TO DATREND AUTHORIZED AGENT.
ES601Plus is a complex instrument which contains internally distributed line voltages and other high voltages for
specific measurement purposes. Failure to observe appropriate measures when the instrument has been
opened, or failure to reassemble correctly may compromise the safety of the user.
WARNING: GROUNDING CIRCUIT CONTINUITY IS VITAL FOR SAFE
OPERATION. NEVER OPERATE THE ES601Plus WITH GROUNDING
CONDUCTOR DISCONNECTED.
Proper grounding is essential to ensure operator safety. Do not bypass the grounding provisions inherent in the
design of ES601Plus, otherwise, the operator may be subjected to an electrical shock risk.
Definitions # Page xiii
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