14
PFP7/REV C/01-08
Section 4
Operation
4.1
Front and rear panel controls
4.1.1
Front panel controls
Figure 4.1.1
: Front panel
power
A two-position rocker switch which controls the AC supply of the
instrument. Any accessories connected to the auxiliary
POWER OUT
sockets on the rear panel are also controlled by the front panel
power
switch.
ignition
A spring loaded switch which, when depressed, will cause an electrical
discharge between the ignition electrode and the burner unit, thereby
causing fuel ignition.
d.p.
This switch controls the position of the decimal point.
fuel
A fine needle valve that controls the flow of fuel and enables optimum
flame conditions to be set.
blank
This control sets zero (or low reading) when a blank standard is
aspirated.
sensitivity:
fine and coarse
Two controls which are used in conjunction to set the digital readout to an
appropriate number when a calibration standard is aspirated.
filter select
A five position control which will select the appropriate optical filter for the
element being determined.
NOTE: positions 1, 2 and 3 will normally be blank unless optional
filters (Ca, Ba or Li respectively) have been fitted.