SPS5.1

Temperature Controller

SPS5.1 kiln temperature controllers

Features

Fully adjustable 2-stage controller
Large clear illuminated 32 character alphabetic display for user-friendly operation
Status display shown during firing
Delayed start facility up to 99hrs. 59mins.
Control range up to 1310°C
Attractive compact wall-mounted enclosure sealed to IP65
R,K,N & S thermocouple types (field selectable)
Optional internal over-temperature trip module (field installable)
Thermocouple burn-out detection
Heater element failure detection
Intelligent power failure recovery
Continuous self-checking of internal operation
Year 2000 compliant

Product Description

These is a fully-adjustable 2-stage controller designed for serious yet budget conscious users.

The first stage is slow heating to an intermediate temperature t1 - the ramp rate is adjustable in the range 20 to 240°C/hour in 20°C/hour steps. The second stage is heating at full power to the top temperature t2. The controller dwells for a soak period at t2 then turns heating power off for natural cooling. Both t1 & t2 are user-settable in the range 0 to 1310°C. The soak period is user-settable from zero to 99 hrs. 59 mins.

Firing Sequence

SPS5 & SPS5.1 firing sequence

Setting


Pressing the SET key causes the display to prompt the user for ramp rate for the initial ramp up to t1.
Pressing the SET key again enables adjustment of temperature t1 in the range 0 to 1310°C.
Pressing the SET key again enables adjustment of the soak temperature t2 in the range 0 to 1310°C.
Another press of the SET key causes the display to prompt for the soak period - this can be set in the range 00:00 to 99hrs:59mins.
Another press of the SET key causes the display to prompt for the start delay - this can be set in the range 00:00 (immediate start) to 99hrs:59mins.
A final press of the SET key returns the instrument to READY mode.

Running

The RUN/HALT key is used to run the firing sequence. This key can also be used to halt the firing at any time. The status of the firing is shown on the display (see Firing Sequence graph).

Additional Displays

During firing additional status information is displayed. This information is sequenced on the top line of the display once per minute or when the right-arrow key is pressed. It acts as a user confidence check of what program is running & how far the program has progressed. Some typical displays are shown below:-

SLOW HEATING...	FAST HEATING...	SOAKING...

Specification

Electrical

Power Supply

Power supply voltage range: 216.2 -253V

Frequency: 50Hz

Controller Power: 3VA

Switched output: 75VA max

Fuse: 1A anti-surge

Kiln Control Relay

Contact type: SPST NO

Contact configuration: Switched Live 230VAC @ 0.3A max.

Thermocouple

Type (user selectable): K,N,R or S

Connectors

2-part connectors - wire size: 1.5mm² max.

Temperature

t1 setting

Range: 0 - 1310°C

Resolution: 1°C

t2 setting

Range: 0 - 1310°C

Resolution: 1°C

Start Delay

Range: 00:00 to 99hrs : 59mins

Control Accuracy

Control type (SPS5): on/off

Control type (SPS5.1): P.I.D.

Accuracy: ±0.25% FSD + 1 digit

Environmental

Operating temperature range: 0 to +40°C

Storage temperature range: -10°C to +55°C

Enclosure sealing: IP65

Enclosure material: ABS or Polycarbonate

Enclosure colour: Light grey RAL 7035

Enclosure size (h x w x d): 160mm x 120mm x 94mm

EMC Compatibility

This instrument is designed for use mainly in Domestic & Light Industrial environments where electro-magnetic interference may cause a loss of accuracy of the displayed reading of up to 3°C. Specified accuracy will be restored when the interference is removed.

The design of this instrument has been assessed and tested assuming maximum connecting lead lengths of 3.0 metres