TIS E217, User Manual

Page: 12 / 24

11

A Current function
Press SELECT button momentarily to toggle between DC and AC. Last selection will be
saved as power up default for repeat measurement convenience.
Application notes for flame sensors:
DC

A function is useful for HVAC/R flame sensor applications. The 0.1

A resolution can
identify the minute current changes in flame detector applications. Flame signal current
check should indicate steady flame signal of at least 2

A for a rectification type, or 1.5

A for
an ultraviolet type (8

A for self checking systems). If a flame signal current with inadequate
strength or fluctuation beyond 10%, check the following to avoid the risk of unwanted flame
relay dropout :
For gas or oil flames (Minipeeper):

Low supply voltage

Detector location

Defective detector wiring

Dirty viewing windows

Faulty Minipeeper
For oil flames (Photocell):

Detector location & wiring

Smoky flame or poorly adjusted air shutter

Faulty Photocell