Display Indication; Voltage Measurements - Ideal SureTest 61-164 Manual De Instrucciones

Wiring Condition
Correct Wiring
No Ground
Polarity Reversal
Open/Hot Neutral
False Ground
If the wiring condition is other than normal, the SureTest is limited on its
measurements that can be performed. If a no ground condition exists, only the line
voltage and voltage drop measurements are available. In a hot/ground reversal, open
neutral or open hot condition, the unit will not have any power so the display will be
blank.
Notes:
1) Will not detect two hot wires in a circuit.
2) Will not detect a combination of defects.
3) Will not detect reversal of grounded and grounding conductors.
4) For individual conductor impedance, refer to page 7.
False Ground Indication
The SureTest indicates when a false ground condition exists from an improper bond
via a bootleg (ground jumper wire at the outlet device) or inadvertent contact of the
ground wire to the neutral connection. Note that if the SureTest is within 15-20 feet
of the main panel, the unit will indicate a false ground condition on a properly wired
circuit due to its close proximity to the proper ground-neutral bond in the main panel.
If necessary, simply use a 3 conductor extension cord that is 20 feet long to make the
measurements.

Voltage Measurements

The line voltage measurement should be 120VAC +/-10% fluctuation at 60 Hz. The peak voltage
should be 1.414 times the rms line voltage reading for a clean sine waveform. Ground-to-neutral
voltage should be less than 2 VAC. In a single-phase circuit, a higher ground-neutral voltage
indicates excessive current leakage between the neutral and ground conductors. In a 3-phase
circuit with a shared neutral, a high ground-neutral voltage could indicate an unbalanced load
between the three phases or harmonic distortion on the shared neutral. Excessive ground-neutral
voltage may result in inconsistent or intermittent equipment performance.

Display Indication

H G N
F
4
Legend
On
Off
Flashing