Teledyne 9700 instruction manual General Information

General Information Model 9700

To protect the Micro-Fuel Cell against damage from low ambient temperatures and reduce the range required of the compensation circuit, the analyzer is equipped with a thermostatically controlled heating system that will not permit the interior of the instrument to drop below 85 deg F.

To eliminate inaccuracies accompanying the positive temperature coefficient of the Micro-Fuel Cell, a specially selected thermistor and network of precision resistors are utilized to produce a negative coefficient of matching characteristics .

The variable element (thermistor) in the compensation network is physically located in the same assembly as the Micro-Fuel Cell so that both devices are exposed to essentially the same temperature conditions.

•Integral Sample Pump Control

Because the analyzer was essentially designed to measure the oxygen content of flue gas, provisions for powering and controlling an electrically driven accessory sample pump have been built into the analyzer. Terminal strip connections as well as protective fusing are provided. Pump power is controlled through the same RANGE switch that controls analyzer power (see Dwg. B-l0913).

•Modular Electronics

The analyzer is equipped with integrated circuit (IC) semiconductor electronics. Components are mounted on a plug- in printed circuit board, as are various optional electronic features, i.e., alarms and converter. Printed circuit assemblies are preset and adjusted for immediate replacement.

6 TELEDYNE BROWN ENGINEERING

Analytical Instruments