Ground Resistance Tester Models 3711 and 3731
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Alarm
Turn the Alarm on/off by pressing the AL
button. The alarm feature provides a
continuous audible warning (when beeper is
active) and visual indications when a
setpoint has been reached (Fig. 13, 14) (e.g.
alarm indication when ground electrode
resistance is above the NEC limit of 25Ω.) If
the alarm is not triggered, only
will be
displayed indicating that the alarm is active.
Programming the Alarm Setpoint
To program the alarm setpoint, push ON and AL together at power-up.
The alarm setpoint value will blink. To program the proper setpoint value
(1 to 199Ω), use the cursor arrows (
down, up).
When the setpoint is reached, turn the
instrument off. This will put the setpoint into
memory. Turn the instrument back on (you
may need to press AL to activate the alarm
feature).
Note: The alarm setpoint is preset at 25Ω.
The alarm will be triggered when the
setpoint is exceeded.
The user has the option of having the alarm
triggered when a reading is below the
programmed setpoint. This is accomplished
with an internal switch and outlined in the
following section.
Figure 13
Figure 14
MEM AL A
Ω
ON
OFF
MEM AL A
Ω
ON
OFF
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