PTC-20 Two Channel Controller

The PTC-20 is designed to control heating and cooling of devices that employ Peltier elements for temperature control over two channels during electrophysiological experiments.

The PTC-20 system provides two independent temperature controller channels and is housed in a 19" standard rackmount cabinet with built-in power supply and cooling elements for the power devices. The PTC-20 system guarantees low noise operation and has special protection features to prevent the preparation from damage. 

The PTC-20 incorporates two channels which include an electronic thermometer for small semiconductor sensor (standard is R2252, i.e. the sensor has a resistance of 2252 Ohms at 25 °C or optionally PT 100, i.e. 100 Ohms at 0 °C), a digital temperature display (XX.X °C) for each channel, a set value control with direct readout (XX.X °C), a PI (proportional-integral) controller with adjustable parameters, an output power control unit and a high-power bipolar output stage (±15 V DC, continuous operation) for Peltier elements (i.e. heat / cool operation) or resistive (i.e. heat only) loads with electronic protection circuits.

For heat-only applications the bipolar output can be switched to unipolar operation (+15 V). The power outputs are short circuit protected, the output power is limited electronically. Maximum output voltage is approximately 15 Volt, the current is limited to 3 A.

The PTC-20 is designed to control heating and cooling of devices that employ Peltier elements for temperature control over two channels during electrophysiological experiments.

The PTC-20 system provides two independent temperature controller channels and is housed in a 19" standard rackmount cabinet with built-in power supply and cooling elements for the power devices. The PTC-20 system guarantees low noise operation and has special protection features to prevent the preparation from damage. 

The PTC-20 incorporates two channels which include an electronic thermometer for small semiconductor sensor (standard is R2252, i.e. the sensor has a resistance of 2252 Ohms at 25 °C or optionally PT 100, i.e. 100 Ohms at 0 °C), a digital temperature display (XX.X °C) for each channel, a set value control with direct readout (XX.X °C), a PI (proportional-integral) controller with adjustable parameters, an output power control unit and a high-power bipolar output stage (±15 V DC, continuous operation) for Peltier elements (i.e. heat / cool operation) or resistive (i.e. heat only) loads with electronic protection circuits.

For heat-only applications the bipolar output can be switched to unipolar operation (+15 V). The power outputs are short circuit protected, the output power is limited electronically. Maximum output voltage is approximately 15 Volt, the current is limited to 3 A.

Options:

• PTC-20, Two channel temperature controller for heating and cooling, use with Peltier elements.
• TS-100, Sensor, Temperature sensor for TC/PTC/MTC systems.
• TS-200, Sensor, Miniature temperature sensor for TC, PTC, MTC systems.

Specifications:

• SENSOR INPUT: for semiconductor 2252 Ohms at 25 °C (standard) or platinum 100 Ohms at 0 °C, accuracy typically 0.1 °C at 25 °C, with electronic protection. 
• SENSOR INPUT (EXT. Mode): 1 mV / °C 
• ALARM and SHUTOFF: disconnects 
• POWER OUTPUT if temperature is below +3 °C (not connected or broken sensor) or above +45 °C (short circuited sensor) 
• DIGITAL DISPLAYS: 3 1/2 digits, XX.X °C (temperature of SENSOR A or B) or XX.X V (voltage at power output) 
• COMMAND INPUT: analog input, 10 mV / °C, via BNC connector 
• SET VALUE CONTROL: digital control, range 2-45 °C, XX.X °C or 0-100% of output voltage (DIRECT mode) 
• TEMPERATURE OUTPUT (A, B): analog outputs, 10 mV / °C, via BNC connector, output impedance: 250 Ohms 
• POWER OUTPUT: ±15 V / 3 A for each channel, short circuit protected, continuous 
• DC LIMITER: control for the output voltage with a linear range from 0 - 100 % 
• CONTROL: PI (proportional-integral) controller, accuracy typically ±0.2 °C, gain range 10-10k, integration time 50 ms - 20 s (logarithmic scale) 
• MEASURING ACCURACY: 0.1 °C at 25 °C 
• POWER REQUIREMENTS: 115 / 230V AC, 60 / 50 Hz, fuse 4 / 2 A slow 
• DIMENSIONS: 19" rackmount cabinet 19" (483 mm), 10" (250 mm), 3.5" (88 mm).

> Download the PTC-20 user manual