Failsafe Selector - Ametek Drexelbrook Z-tron Level Control 502-302X Series Installation And Operating Instructions Manual

502-302 Series Z-tron Level Control
X

3.2.3 Failsafe Selector

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Failsafe describes the level condition which causes the the
output relay to de-energize and the condition of the relay
upon loss of power or instrument failure.
•High Level Failsafe (HLFS) means the relay will de-
energize under high level conditions, indicating high
level upon loss of power.
•Low Level Failsafe (LLFS) means the relay will de-
energize under low-level conditions, indicating low level
upon loss of power.
•The instrument is supplied in the failsafe mode that is
requested when the order is placed (HLFS, if not speci-
fied).
•The failsafe is field selectable by a slide switch, acces-
sible through a hole in the side of the chassis. See Figure
3-3.
Failsafe Adjustment
10
Figure 3-3
Operation