Richards Thermocouple and Temperature Sensor Catalog 16

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The Richards model ASR400 and ASR900 micro processor temperature process controllers are very economical solutions for
temperature control in your process. These instruments are also inexpensive enough that they can also be used in situations where just an
indicator is required. They are accurate and have selectable inputs for all standard thermocouple Types (B, C, E, J, K, N, R, S, T & Platinel II)
and Pt100 JIS three wire RTD’s. Their sizes are excellent for panel mounting of multiple instruments. The ASR400 and ASR900 are bezel
mount instruments, which require no mounting screws for installation in panels.
Features: √ ASR400: Up to two alarms √ ASR900: Up to three alarm √ Multi range input (TCs and RTDs)
√ Two individual outputs √ Self-diagnosis function √ RS232 and RS485 communication
√ Fuzzy Logic PID control √ Adjustable output range √ 4 levels of security and lock-out
√ 0.2% accuracy (displayed) √ ASR900: Bar graph % output display
Output options: Relay contact - SPDT 3A-240VAC SSR Voltage pulse - 20VDC-20mA Current 4-20mA
Example range: Type K (Thermocouple): 0 to 1200°C (0 to 2192°F)
ASR400 - 1/16 DIN Panel Mount
ASR900 - 1/4 DIN Panel Mount
Item General Specifications
Power supply AC 85V to 265V 50/60Hz
Power Consumption About 4 VA
Memory Element EEPROM
Accuracy Within .02% of displayed value + 1 digit
Sampling Time 250 ms
Isolation Output part (Control alarm transfer) and input part
(measuring, CPU) are isolated separately.
Dielectricity Measuring terminal-ground terminal AC 1000V, 1 min.
Power supply terminal-ground terminal AC1500, 1 min.
Isolated Resistance Measuring terminal-ground terminal DC 500V more
than 10M Ohms.
Operating temperature 0 to 50°C or 122°F
Storage Temperature -25 to 65°C or 149°F
Humidity Range 50 to 85% RH (not dew)
Net Weights: ASR400 150 grams
ASR900 320 grams
Panel Cut Out
Dimensions
ASR400 44.5 mm x 44.5 mm (1.75” x 1.75”)
ASR900 90.5 mm x 90.5 mm (3.56” x 3.56”)
Instrument Outline
Dimensions
ASR400 50 mm x 50 mm x 97 mm (1.97” x 1.97” x 3.82”)
ASR900 96 mm x 96 mm x 97 mm (3.78” x 3.78” x 3.82”)
ASR400
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ASR900
Digital Temperature Controllers - ASR400 and ASR900
Page 174 Phone: 617.527.4385 Fax: 617.964.3746 Email: