Page
SPS5.1 Manual
4
Delay Time
This is a user-settable start delay time in the range 0 to 99 hours 59 mins. This feature can be used to
delay firing - enabling firing during the night, possibly on low-tariff electricity.
Ramp 1
Heating is performed to increase the temperature of the load from ambient to temperature t1. The value
of t1 is user-settable in the range 0-1310°C. The rate of increase of temperature depends on the ramp
rate selected. This ramp rate is user-settable in the range 20-240°C/hour.
Ramp 2
Heating is performed at full power (100% energy) to increase the temperature of the load from
temperature t1 to the soak temperature. The soak temperature is user-settable in the range 0-1310°C.
Soak Time
This is the time that the controller dwells at the soak temperature. The soak time is user-settable in the
range 0 to 99hr 59mins. After soaking the controller cuts off heating power and the load is allowed to
cool naturally.
2.3
Keys
Pressing this key when
READY
is displayed will start a firing using firing parameters
which have been previously selected with the
SET
key. Pressing this key when a firing in
in progress will immediately abort the firing.
Pressing this key when
READY
is displayed enables the user to select firing parameters.
Pressing this key during a firing has no effect.
This is used to increment user input when in SET mode. Pressing this key has no effect
when
READY
is displayed or when a firing is in progress.
This is used for digit select when in SET mode. It is also used to review controller
status during firing. Pressing this key when
READY
is displayed has no effect.
RUN
HALT
SET
SPS5.1 Manual
Page 9
3.4
Wiring
Relay
K1 K2 K3 L N E
2
1
1
N
Contactor
Thermocouple
Connections
+
-
+
SK2
6
Contactor coil
suppressor
(must be fitted)
N
E
L
SK1
L N E
3.4.1
Contactor Coil Suppression
The coil of the contactor
must be suppressed
with an RC filter network. The RC network must
be connected directly across the coil terminals on the contactor.
Suitable proprietary RC filter networks fitted with insulated wire leads are:-
1.
RS Components
Part No. 210-364
2.
RS Components (tab fixing)
Part No. 210-370
3.
Farnell Electronic Components
Part No. 218-893
Note
to ensure compliance with the
EMC & LVD Directives lead
lengths should not exceed 3m.
