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Watchman Temperature Trips
These over-temperature trips are safety devices designed to protect kilns from
over-firing. They behave as a re-settable heat fuse. 16 switch-selectable trip
temperatures are available. Thermocouple types K,N,R & S are jumper-selectable.
Model
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Description
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Datasheet
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Handbook
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Price £ Pounds Sterling
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| ST101 |
DIN rail mounting trip |
n/a |
n/a |
70 |
| SPS008 |
Internal trip for ST5 series |
sps8ids.pdf |
sps8ihb.pdf |
76 |
| ST201 |
Panel
mounted trip |
data201.pdf |
user201.pdf |
115 |
| Datasheets & handbooks are in Adobe Acrobat (pdf) format. You
will need the Adobe Reader to view them. If you do not already have this then it is
available here. |
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ST008
| The SPS8i is an independent over-temperature trip module
designed solely for internal fitment to the SPS5 range of controllers. It is an
optional safety device designed to protect kilns from over-firing. It behaves like a
re-settable heat fuse. Operation of the trip is indicated by an otherwise hidden
'FAULT' legend on the controller front panel |
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Specification
Electrical
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Power Supply
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Derives power from SPS5 series controller
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Control Relay
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Contact type: SPST NO
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Contact power rating: 230VA max
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Contact configuration: Volt-free contact. Closed when healthy, open when tripped
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Thermocouple
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Type (user selectable): K,N,R or S
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Temperature
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Trip settings in °C ('R' & 'S' type thermocouples)
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16 settings via rotary switch: 1000, 1050, 1100, 1150, 1100, 1150, 1200, 1250,
1300, 1310, 1320, 1330, 1340, 1350, 1360, 1370, 1380, 1400
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Trip settings in °C ('K' & 'N' type thermocouples)
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16 settings via rotary switch: 650, 675, 700, 725, 750, 775, 800, 825, 850, 875, 900,
925, 950, 975, 1000, 1025
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Accuracy (at 20°C ambient)
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Typical: +17°C
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Maximum error: -5°C to +35°C
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Cold Junction Compensation
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not compensated
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Environmental
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same as SPS5 series
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EMC Compatibility
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This trip is designed for use mainly in Domestic & Light Industrial environments
where electro-magnetic interference may cause a loss of accuracy of the trip temperature
of up to 3°C. Specified accuracy will be restored when the interference is
removed.
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