SRS PTC10 Programmable Temperature Controller

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Introducing the Stanford Research Systems PTC10 Programmable Temperature Controller — the ideal instrument for measuring temperature, controlling heaters, and logging temperature data.

The SRS PTC10 Programmable Temperature Controller is a modular system that can be configured to suit a wide range of applications. The system consists of the PTC10 Controller and up to four I/O cards — two types of input cards for RTDs and thermocouples, and two types of output cards for controlling heaters. The I/O cards are ordered separately, and you can mix and match them in any way you wish.

Input Cards
The PTC321 input card supports up to four Pt RTD sensors. Each channel has a four-wire input with its own 1 mA current source for sensor excitation. The current can be reversed with each reading to cancel out stray thermocouple EMFs.

For thermocouples, the PTC330 four channel thermocouple input card should be used. It is factory configured to interface with either E, J, K or T type thermocouples. Each channel is electrically isolated allowing thermocouples to be attached to electrically-live equipment.

Both input cards have selectable low-pass filters that help reduce noise and improve PID feedback performance.

Output Cards
The PTC420 output card is a 120/240 VAC heater driver that delivers up to 5 A of current, and is intended to drive large heaters. Alternatively, the PTC430 DC output card delivers up to 50 VDC and 1 A of current for driving smaller heaters.

PID Feedback
Each output card is supported with a digital PID controller algorithm with automatic as well as manual tuning capability. You can servo PID controllers to any of the input signals, or the difference of any two input signals.

Since the temperature of most heaters is proportional to the square of the heater current or voltage, a square root filter is available to linearize the PID output.

Up to ten unique temperature ranges can be programmed with their own PID parameters.

Data Acquisition and Display
All temperature input channels are read simultaneously at a sampling rate that can be set between 1 Hz and 50 Hz. Temperature data can be displayed numerically or graphically on the LCD display. A group of channels can be plotted on the same graph or on smaller individual graphs.

Alarms
Upper and lower alarm levels, or rate-of-change limits, can be assigned to each input channel. If these limits are exceeded, an audible alarm sounds, and assigned relays change state.

Programmability
Remote operation is supported with GPIB (opt.), RS-232 and Ethernet computer interfaces. All instrument functions can be controlled and read over any of the interfaces.

The PTC10 stores data on USB devices like flash keys, flash card readers, and USB hard drives. Data is stored in binary format to minimize file size and access time, but can be converted to ASCII text using an included application.

Multi-Purpose Ports
The PTC10 also has four configurable general purpose DACs/ADCs, eight bidirectional digital lines, and four relays.

The General purpose DAC/ADC card can be replaced by the PTC332 single slot Pt RTD input card allowing you to use all four I/O slots for output cards. This makes the PTC10 into a complete 4 chennel temperature controller.

Flexibility
The PTC10 Programmable Temperature Controller has the flexibility to handle virtually any temperature control application. It’s as useful in the research lab as it is in industry. The PTC10 is the right choice for all your temperature control experiments.