®
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●
Probe-Contact EF -Detection (Single-pole):
For more precise indication of liv e wires, such as distinguishing
between Live and Ground connections, use one single test probe
to test via terminal
COM
for direct metal contact probing to achieve
the most distinctive indications.
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Inputs are made via the test lead terminals
COM
/
+
.
DC
m
A
●Application notes:
The
DC A
function is designed especially
m
for HVAC/R flame sensor applications. The
0.1 A resolution is useful for identifying the
m
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
m
m
A for an ultraviolet type ( 8
A for self
m
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 window
Faulty Minipeeper
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For oil flames (Photocell):
Detector location & wiring
Smoky flame or poorly adjusted air shutter
Faulty Photocell
Temperature over 165 oF (74 C) at
For gas flames (Flame Rod):
Ignition interference (A fla me signal current difference with the
ignition both on and off greater than 0.5 A indicates the presence
m
of ignition interference)
●
photocell
