ABB 9437-500 DO Meter Series 4600 Model 4646

ABB 9437-500 DO Meter Series 4600 Model 4646 

ABB Model 9437-500 Low Level Dissolved Oxygen Monitoring System,A compact, competitively priced low level dissolved oxygen monitoring system.

The 9437 500 transmitter is a wall-mounted instrument and the 9437 501 model is a panel-mounted, 1/4 DIN-sized instrument. Both instruments have a single programmable D.O. input channel, and a single temperature input channel. The sample temperature is sensed by a Pt1000 resistance thermometer incorporated in the flowcell. Instrument operation and programming is via four tactile membrane switches located on the front panel. Programs are protected from unauthorized alteration by a five-digit security code.

The Model 9435-500 sensor unit is shown in Fig. 2.6. It consists of a metal case of similar construction to the transmitter case, with the pipework carrying the sample mounted on a panel bolted to the back with four M6 captive bolts.

Specification of Flowcell ABB 9437-500 transmitter Series 4600 Model 4646

Mounting

Vertically, using the built-in fixing bracket

Measuring ranges

Programmable within the ranges 0 to 20.0μg/kg and 0 to 20mg/kg

Scaling μg/kg, mg/kg or ppb, ppm

Accuracy ±5% of reading or ±1μg/kg, whichever is the greater

Response time 90% of a step change in 1 minute

Resolution 0.1 μg/kg

Stability ±5% of reading or ±1μg/kg per week, whichever is the greater

Temperature compensation 5 to 55°C automatic using Pt1000 resistance thermometer

Salinity correction

Preset within the range 0 to 80ppt

Barometric pressure correction

Preset within the range 500 to 800mm Hg

Sample flow 100 to 500ml/min

Sample pressure Maximum 2bar

Sample temperature 5 to 55°C (41 to 131°F)

Sensor ambient temperature 0 to 55°C (32 to 131°F)