ERICO EST401 ERITECH Clamp-on Ground Resistance Tester - Manual (Page 10)

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Digital Display Features
Displayed when the beeper is active. To turn the beeper On/Off, push ON & Ω
together at power-up. The beeper is active when displayed.
Displayed when the HOLD function is activated. This function locks the present
displayed value. During HOLD: A, Ω, and Alarm functions are deactivated. The
Memory function may still be used.
Indicates that the jaws of the instrument are not properly closed. The Open Jaw
indication is present only in the Ω Mode. Check for foreign matter in the jaw
mating surface.
In the Ω function, this symbol indicates the presence of excessive stray noise in
the ground electrode under test. This symbol will be present if noise signals
reach an amplitude of approx. 5A or 50V. Resistance measurement values are
no longer valid. The beeper is also activated.
Displayed when measured resistance is below 0.1Ω. This may indicate that the
grounding electrode you are clamped onto is continuous with itself (the instru-
ment is measuring a metallic loop and not the ground electrode resistance). In
this situation, electrode resistance measurements may not be valid. The main
display can measure between 0.7 to 0.07Ω, but without any specified accuracy.
Current measurement mode.
Ground resistance measurement mode.
Indicates the Auto-Off feature is deactivated and the instrument stays on
permanently (until turned off by the user). With no symbol displayed, after
5 minutes of non-use the instrument will automatically shut itself off. The
Auto-Off feature is turned On/Off by pressing Hold at power-up.
Display flashes this symbol (1/second) during a low battery condition.
Measurements are still possible. When this symbol is displayed continuously,
measurements are no longer possible. Battery replacement is necessary.
Indicates the approximate percentage of useful battery life remaining (0-100%).
This function is displayed only upon initial power-up when the ON push-button
is held down for more than 2 seconds.
The overload symbol will illuminate when the measurement reading is beyond
the limits of the instrument:
Resistance > 1200Ω
Current > 30.00A rms
The beeper is activated in current overload.
+
–
mA
R .1 HOLD
MEM
MR
NOISE
,
Figure 2
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