Optical Smoke Meter: General Specification

Measurement Range : 0 to 80 SAE Smoke Units (nominal). Range can be varied depending on customerrequirements.

Analogue Output : 50-ohm BNC. 0 - 5 volt dc representing 0 to 80 SAE Linear. 0 - 5 volt dc raw detector module output.

Serial Link : RS232 (9-pin ‘D’ type socket connector).

Parallel Output : 12-bit TTL (15-pin ‘D’ type socket connector.

Remote Control : Allows control of heater and light sources and choice of filtered sample, unfiltered sample, filtered air and standby mode. Control signals are either active low TTL signals or relay contacts to 0 volt (15-pin ‘D’ type plug connector).

Response Time T90 : better than 10 seconds. Resolution : > 0.1 SAE Smoke Units.

Repeatability : + 1% at 5% attenuation level after warm-up period.

Power Supply Options : 240/110 volt ac, 50/60 Hz (to be confirmed by customer with order).

Power Consumption : 3 amps (240 volt), 7 amps (110 volt).

Pressure Readout : 0 to 1,000 mbar.

Sample and Control Module Ambient Environment : Temperature 0 to 40°C maximum, Humidity 95% R.H non-condensing.

Exhaust Gas Sample Requirements : 55°C maximum. Non-condensing 4 - 25 litres per minute.

Sample Module : 19in wide by 270mm (10.5in) high by 535mm (21in) deep. Weight 24 kg.

Control Module : 19in wide by 135mm (5.25in) high by 255mm (10in) deep. Weight 5 kg.