TC312 LOW COST DIGITAL DUAL ALARM CONTROLLER

INSTRUCTION MANUAL

CONTENTS DESCRIPTION..........................................................2 INSTALLATION.........................................................2 ALARM SETTING.....................................................2 CONNECTION..........................................................3

TECHNICAL SPECIFICATION.................................4 ORDERING INFORMATION.....................................4 SUPPLIER INFORMATION......................................4

TC312 Instruction Manual

Powtier Controls Limited

DESCRIPTION The TC312 is housed in a durable sheet metal and flame retardent plastic housing with display panel at the front and wiring connections at the back. The seven segment LED display monitors measured value continuously. The alarm channel display select switch has three positions, upper, middle and lower and unless manually held over, automatically resets to the mid-position where the digital display monitors the measured temperature. Held in the upper or lower position, the channel 1 or channel 2 alarm termperature set level is displayed respectively. An alarm condition (on either channel 1 or 2) is indicated by flashing the top alarm LED. Channel 1 or 2 alarm LEDs illuminates continuously when the respective channel is in alarm state.

Dimensions

INSTALLATION The instrument requires a 92X92mm panel cut out and is fixed by retainers positioned on the top and bottom of the instrument. Maximum panel thickness is 10mm.

All external wiring is made to the rear of the instrument via M3 screw terminals.

ALARM SETTING Channel 1 alarm setpoint can be adjusted by holding the alarm channel display select switch in the upper position to display the channel 1 alarm setpoint and turn the channel 1 alarm setpoint pot behind the front setpoint cover. Channel 2 alarm setpoint can be adjusted by holding the alarm channel display select switch in the lower position to display the channel 2 alarm setpoint and turn the channel 2 alarm setpoint pot behind the front setpoint cover.

21 August 1995 Issue 2.0

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TC312 Instruction Manual

Powtier Controls Limited

CONNECTION

Typical wiring schematic.

Terminal connection diagram. 21 August 1995 Issue 2.0

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TC312 Instruction Manual

Powtier Controls Limited

TECHNICAL SPECIFICATION INPUT Thermocouple Standard Cold junction Compensation Thermocouple break protection Resistance Thermometer 2 or 3 wire RTD (Pt 100) ALARM OUTPUTS Relay Alarm alert Alarm span Alarm setting stability

Alarm hysteresis band

Upscale fitted as standard; display shows -.-. Lead resistance error is automatically reduced by using 3 wires. BS 1904, DIN 43760.

Operating temperature PERFORMANCE Indication accuracy Supply voltage variation GENERAL Display digit Display

115/230V +/-15% 50/60Hz 100/200V +10% -15% 50/60Hz. 0 to 50 Deg.C. Better than 0.5% of span +/-1 digit. Negligible effect.

3 or 31/2 digits. 7 segment and negative 5A resistive at 230Vrms. sign display; digit size Indicated by a LED 13mm height by flashing at 0.5s intervals 7.4mm width. Adjustable from 0% to Dimensions 96x96x190mm. 100% of span Panel cut out dimensions 92x92mm. Better than 0.01% of Weight 1Kg maximum. span/°C of ambient change Power consumption 6VA maximum. within 0 to 50°C. +/-2°C.

ORDERING INFORMATION You are welcome to order by description or code. 312 - - - - - - - 00 INPUT.....................................: : : : : : : SCALE.........................................: : : : : : SUPPLY VOLTAGE..........................: : : : : CHANNEL 1 ALARM.............................: : : : CHANNEL 2 ALARM..................................: : : OPTION...........................................................: : END OF CODE...................................................: INPUT Iron-Constantan (J) BS -50 to 500....................................10 Fe-Konst (J) DIN -50 to 500....................................30 Chromel Alumel (K) -50 to 500....................................20 0 to 999.......................................23 0 to 1200.....................................21 Resistance Thermometer (PT100) -50 to 200....................................40 SCALE Degree Celsius.................................C Degree Fahrenheit.............................F SUPPLY VOLTAGE 115/230V +/-15% 50/60Hz.................1 100/200V +10% -15% 50/60Hz..........2 CHANNEL 1 ALARM Low alarm de-energised in alarm state . . .021 Low alarm energised in alarm state...... . .121 High alarm de-energised in alarm state...022 High alarm energised in alarm state..... . .122

21 August 1995 Issue 2.0

ENVIRONMENTAL Supply voltage

ASTM E230, BS4937 DIN 43710. Automatic.

CHANNEL 2 ALARM Low alarm de-energised in alarm state ....... .021 Low alarm energised in alarm state............ .121 High alarm de-energised in alarm state....... .022 High alarm energised in alarm state........... .122 OPTION Downscale thermocouple break protection..........61 END OF CODE...................................................................00

Please consult Sales office for other possible options and scales. ORDER EXAMPLE: A TC308 with J-type thermocouple input, scaled -50 to 500 °C, relay heat output, operating at 230V and without any option will have the code:308-10-C-10-1-00.

SUPPLIER INFORMATION Powtier Controls Limited Unit 4, Parkland Business Centre Chartwell Road, Lancing West Sussex BN15 8UE England Tel: +44(0)1903 750800 Fax: +44(0)1903 750678 Email: [email protected]

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