
#Calex model 6255 full#
Simple on/off control with hysteresis is possible, as is full PID control. The ATR121 has two relays and an SSR output that can be configured in a choice of combinations of alarm and control. With the measured temperature successfully displayed on the screen of the controller, the PID control parameters can then be tuned and adjusted via the ATR121’s configuration menu. Step by step instructions are available here:ĪTR121B – 230 V AC – Connection Instructions for 2-wire 4-20 mA sensors (PDF)ĪTR121AD – 12…24 V AC/DC – Connection Instructions for 2-wire 4-20 mA sensors (PDF) The exact settings to use depend on the temperature range of the sensor. A quick configuration process is all that is needed to set the ATR121 to read the temperature output from the PyroCouple. Connection and Configurationįirstly, connect the sensor and power supply to the ATR121. The ATR121 is available with supply voltages of 230 V AC (ATR121-B) or 12-24 V AC/DC (ATR121-AD). It has a universal analogue input that can be connected to the PyroCouple sensor, and provides power to the sensor on the two-wire 4-20 mA loop. The Pixsys ATR121 is a small, low-cost panel-mounted Proportional-Integral-Derivative (PID) controller with a 3-digit display and outputs for control and alarm including relay and Solid State Relay (SSR). It measures non-reflective non-metal materials, or painted metal surfaces, and has a two-wire loop-powered 4-20 mA output.Ī commonly-used model is PC151MT-0, which has a temperature range of 0☌ to 250☌ (other ranges are available), and 15:1 general-purpose optics to measure the surface temperature within a small area whose size increases with measurement distance.

The simple, low-cost PyroCouple infrared temperature sensor is commonly used in a wide range of industrial applications. One of the simplest ways to measure temperature without contact and obtain a control output is to use a Calex PyroCouple pyrometer and a low-cost indicating controller such as the ATR121. Infrared temperature sensors are commonly used in industry to control aspects of the process such as heaters, cooling systems and line speed.
