Ametek Z-tron IV, Installation And Operating Instructions Manual

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16
Z-tron IV
TM
Point Level Control
3.4 Failsafe
Failsafe describes the level condition which causes the
output relay to de-energize, and determines the condition
of the relay upon loss of power or upon the failure of most
components.
• The failsafe mode may be selected in the field by
changing the position of the right slide switch located on
the top of the instrument. See Figure 3-1.
• High Level Failsafe (HLFS) means the relay will de-
energize when level is high, indicating high level upon
loss of power. (N.O. contacts open/N.C. contacts closed).
• Low Level Failsafe (LLFS) means the relay will de-
energize when level is low, indicating low level upon loss
of power. (N.O. contacts open/N.C. contacts closed).
• The instrument is supplied in the failsafe mode that is
requested when the order is placed. If none specified, it
will be shipped as High Level Failsafe (HLFS).
Selecting Failsafe with the Right Slide Switch:
High Level Failsafe (HLFS)
- Right Switch is up.
Low Level Failsafe (LLFS)
- Right Switch is down.
3.5 Start-up
Be sure the power wiring and voltage are correct.
Improper wiring may cause permanent damage,
personal injury, and void the factory warranty!
See Section 2.6.
STOP