User Manual

KEW6310 5.3.2 Criteria of Judgment
KEW6310 5.8
Check screen
In case of NG, Error message appears. (Press the ENTER K ey w hen OK is di splay ed .)
* Check results may be affected if great power factors exist at the measurement sites.
5.3.2 Criteria of Judgment
Check Criteria of Judgment Cause
Frequency Frequency of V1 is between 42 and
68Hz.
• Voltage clip is firmly connected to the DUT?
• Measuring too high harmonic components?
Volt age inpu t Volt age in pu t is 10% o r mo re o f (Voltage
Range x VT).
• Voltage clip is firmly connected to the DUT?
• Volt age test le ad s are firmly conn ected to
the Voltage input terminals on the
instrument?
Volt age ba lanc e Volt age in put i s within ±30º of r e fere nce
voltage (V1)
* (not ju dged by sing le-phase wiring)
• Setting against the wiring under test are
matched?
• Voltage clip is firmly connected to the DUT?
• Volt age test le ad s are firmly conn ected to
the Voltage input terminals on the
instrument?
Volt age phase Phase of volt age input i s w ithin ±10º of
referenc e val ue (pr ope r ve cto r) .
• Volt ag e te st le ads are p rope rly conne cted?
(Connected to proper chan ne ls? )
Current inpu t Current inpu t is 5% or more of (Cu rrent
Range x CT).
• Clamp sensors are firmly connected to the
Power input terminals on the instrument?
• Setting for Current Range is appropriate for
input levels?
Current phase Current input is within ±60° of reference
value (proper vector).
• Arrow mark on a Clamp sensor and the
orientation of flowing current is matched?
(Power supply to Load )
• Clamp sensors are connected properly?