I.C.E. HTDM Food Process Unit - Manual (Page 24)

24
VII. Discharge Sensor and RSP (Remote Set Point) Test
Once the combustion curve has been set up and the board configured
for stand alone the operation of the discharge sensor and RSP must
be verified. To accomplish this the computer must be connected to
an active ICECON II controller. With the system in heat mode
activate the “Tools” pull down menu and select “I/O view”.
A new screen is no displayed. On the lower right there are three
buttons, “Read”, “5 second read” and “Exit”. “Read” performs a
one-time read of the variables. “5 second read” performs a read
function every 5 seconds. “Exit” closes the I/O screen. Click
the “5 second read” button.
Compare the value of the discharge sensor reading with a know
temperature. At this time if a discharge reading of 281
°
F is
displayed there is an open circuit in the discharge sensor circuit
and the unit will lock out on “High Limit Error”. The discharge
sensor reading should be stable with less than 1-2
°
fluctuations at
steady state conditions.
Turn the RSP counter clockwise until the physical stop is reached.
A value of 40 when a 40-90
°
F RSP is being used and 90 when a 90-
120
°
F RSP is used should be displayed in the RSP value (This may
take up to 30 seconds).
Turn RSP clockwise until the physical stop is reached. The upper
limit of the RSP should be displayed. Verify a mid point and
align the pot to the correct temperature scale position. To do
this, use a small screwdriver to loosen the knob and reposition
such that the arrow points to the correct temperature. Retighten
the knob.
The low temperature scale should have an ohm range of 0-5000
Ω
resistance range. The High temperature range RSP should have
100k
Ω
-200k
Ω
resistance range.