The ActionI/Q model Q486 is a DIN rail mount, RTD, thermocouple, mV or Ohm input signal conditioner with 1800V isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for most temperature signal conditioning applications.

The ActionI/Q model Q486 is a DIN rail mount, RTD, thermocouple, mV or Ohm input signal conditioner with 1800V isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for most temperature signal conditioning applications.

An optional Microsoft Windows® based (PC) program on CD ROM and serial port adapter cable are available (model C681) for those who would prefer PC configuration capability. The Graphic

User Interface (GUI) program takes the place of setting DIP switches and using the push button for ranging. The C681 GUI program can significantly speed configuration and an input signal calibrator is not required for ranging since the values only need to be typed in the program and down loaded.

INSTANT ACCURACY ACCURACY TECHNOLOGY

Instant Accuracy Technology is incorporated to maximize accuracy and performance during warm up and during changes in ambient temperature. This patented cold-junction compensation technique utilizes two temperature sensors to measure the differential temperature near the terminal block. Using heat transfer calculations with the measured differential temperature and the known thermal conductivity of the PCB, we can determine the terminal junction temperature with extreme accuracy. Even during unstable thermal states such as “start-up” ambient temperature changes or changing load or power, the Q486 performs extremely accurate thermocouple temperature measurement.

The direct benefits of Instant Accuracy include improved system performance and productivity due to reduced warm up time, fewer temperature measurement errors and tighter process control for higher quality. Finally and possibly most significantly, calibration can be checked quickly and accurately without the effects of rapid ambient temperature changes due to opening a control panel door. This often causes erroneous readings and miscalibrations; a common cause of measurement errors.

TOUCHCAL TECHNOLOGY

TouchCAL technology allows easy field ranging for any of the thermocouple or RTD input types. For example, the dip switch configured range for the J type thermocouple is -210 to 760°C. Using a thermocouple simulator as a reference, the model Q486 could be ranged for 0 to 50°C or 0 to 500°C by simply applying the desired minimum and maximum input levels and pushing the range button to store the levels in non-volatile memory. The output is ranged by applying an input signal to achieve an accurate output level and pushing the range button.

TECHNICAL SPECIFICATION (Q486)

Inputs 

• Sensor Types: see Table 9

• Ranges: Any span within Accuracy Range in Table 9

• Impedance: > 1.0MW typical for t/c and mV inputs

• RTD Excitation: < 0.3mA

• Burnout Detection: up or down scale

• CJC Error: < +0.1°C max. Instant Accuracy ensures the output is within +0.5°C of rated accuracy 30 seconds after powering

Output 

Voltage Output    

• Range:   0-10V

• Drive:   10mA (1000W load min.)

Current Output 

Ranges: 4-20mA

Drive: 15V (750W max.)

Isolation     

1800VDC or peak AC between input output and power

Configuration 

• SW1: Push Button, input and output ranging

• SW2: Linearization, Burnout, Output (voltage or current), and initialization mode

• SW3: Input Type

Accuracy 

• Input (A/D): see Table 9

• Linearization: < +0.05% of accuracy range, max.

• Output: < +10mA for current output < +5mV for voltage output

Thermal Stability   

• CJC:+ 0.01°C / °C change in ambient, max.

• Zero:   + 0.0075% of full scale /°C change in ambient, max.

• Span:   + 0.0075% of full scale /°C change in ambient, max.

• Long Term:   + 0.1% maximum over a 9 month period