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The Megger LT7 Digital loop tester is a compact portable instrument
designed to measure earth loop impedance and prospective short circuit
current. A special range is provided to carry out loop measurement on
installations protected by Residual Current Devices ≥30mAwithout causing
the breaker to trip out. The resolution in this range (1Ω) is more than
adequate for this purpose. Should greater resolution be required (0.01Ω)
the conventional 23Arange can be used.
Digital LCD
Low Battery
Indicator
P h a s e / E a r t h
Vo l t a g e
I n d i c a t o r
Retest
Push button
4 Position
R o t a r y
S w i t c h
Battery
Compartment
C o v e r
Battery Replacement:
For safety reasons, the battery compartment must not be opened if the test
lead(s) are connected. Undo the two screws in the instrument base to
access the battery compartment, and replace the battery cells. The
instrument will beep. Ensure that correct polarity is observed and that the
cover is correctly replaced.
GENERAL DESCRIPTION
Features
Thermal
Protection
Indicator
'Excessive
Noise'
Indicator
Neutral/Earth
Vo l t a g e
I n d i c a t o r
Prospective
Short Circuit
Current
Measurement
High Current
(23A) Loop
M e a s u r e m e n t
Low current
(15mA) Loop
M e a s u r e m e n t
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