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TestEquity LLC, Environmental Chamber Division Environmental Chambers for Temperature and Humidity Testing
   TestEquity F4 Programmable Controller

Programmable Temperature ControllerThe F4 Programmable Controller features a four line, high definition LCD interface display that makes profile programming and controller configuration significantly faster and easier. A large LED readout indicates the actual chamber temperature with 0.1°C or °F display resolution. Internal logic provides refrigeration compressor control based on the demand for cooling for responsive and reliable performance.

The controller is packaged with a NEMA 4X front face to withstand harsh environments. It is manufactured for TestEquity by Watlow and backed by a three-year warranty.

Set Point Ramp and Soak Programming
The enhanced programming features found in the F4 controller are the result of listening to our customers' demand for greater capabilities with reduced programming complexity. Up to 256 steps can be programmed into as many as 40 namable profiles.

A profile guide leads the programmer through the programming process by offering choices for step configuration. For better operator recognition profiles and digital I/O used for events can be given names of up to 10 characters in length.

Five step types including ramp, soak, jump, auto start and end offer the programmer complete flexibility.

Five step types including ramp, soak, jump, auto start and end offer you complete flexibility. Ramp steps can be based on time or rate. Ramp and soak steps can be programmed to wait for up to four event inputs and three process variables. Up to seven event outputs are step selectable. Five sets of PID heat/cool parameters are also step selectable. The auto start step can start a profile based on a set date, a day of the week, or daily. The jump step can be used to jump within a profile or to another profile.

Serial Communication
RS-232 and RS-485 serial communication interfaces are included. The baud rate is selectable as either 9600 or 19200 baud. The controller uses Modbus™ RTU protocol. Modbus™
enables a computer to read and write directly to registers containing the controller's parameters. With it you could read all of the controller’s parameters with a few read commands.
RS-232C programming resources

Two Form "C" electromechanical alarm relays are included. These alarms can be programmed as either process or deviation alarms. The alarms can be tied to up to three process variables. (The chamber also has an independent High/Low Limit Controller with an audible alarm which is used as a safety device.)

Optional Analog Retransmit
Analog retransmit capability is available to retransmit two variables. These variables include chamber temperature, temperature set point or percent control power.

Optional GPIB Interface
Converts the controller's serial interface to GPIB.
GPIB interface, programming resources and LabVIEW Drivers

Optional Ethernet Interface
Converts the controller's serial interface to Ethernet. It is fully VXI-11.3 compliant so it fits in with todays new test equipment architectures that use Ethernet networks. VXI-11 is a communication standard developed by the VISA consortium in 1995 in conjunction with the VISA Specification. VXI-11.3 is the sub-specification for network instruments.
Ethernet interface Information

Temperature Controller Specifications

Accuracy & Sensor Conformity* ±0.55°C, ±1 LSD (above -50°C)
±0.65°C, ±1 LSD (below -50°C)
Stability ±0.1°C/°C rise in ambient
Digital Inputs Four inputs. Contact closure or dc voltage, 10 kohm impedance
Retransmit Outputs
Two outputs.
User-selectable ranges:
0 to 10 VDC, 0 to 5 VDC, 1 to 5 VDC
0 to 20 mA, 4 to 20 mA
Alarm Outputs Two alarm outputs.
Electromechanical relay, Form C, 2 A @ 20 VDC or 240 VAC max.
Digital Outputs Seven open-collector ouputs available for customer use.
OFF: 42 VDC @ 10 µA max.
ON: 0.2 VDC @ 50 mA sink max.
Internal supply: 5 VDC @ 80 mA
Communications RS-232 and RS-485 serial communications with Modbus™ RTU protocol
Safety & Agency Approvals UL/c-UL 916-listed, File #E185611
CE to EN61010
NEMA 4X and IP65
CE EMC to EN50082-2
CE EMC to EN55011
Displays Process: 5, seven-segment red LED
Interface Display: 4-line high-definition green LCD
Selectable °C or °F
Data Retention Retention upon power failure via nonvolatile memory (seven years for battery-backed RAM)
*Note: Total system accuracy in the chamber includes thermocouple wire accuracy. Thermocouple wire accuracy is ±1°C or 0.75% of reading, whichever is greater.

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