General Information | Model 9700 |
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4.1Operating Controls and Indicators
•The POWER toggle switch is used to turn the combustible gas analyzer ON and OFF.
•The meter displays the gas concentration at the detection point as a percentage of the combustible gas and is graduated from
•The green SAFE light is illuminated during normal operation and indicates that the combustible gas sensing element is operating.
•The red ALARM light is illuminated either when the combustible gas concentration rises above the adjustable ALARM setpoint, or in the event of a sensing element circuit malfunction. The two conditions can easily be distinguished by observing the meter reading. In a gas alarm, the meter pointer will be upscale above the predetermined level. In a malfunction type alarm, the meter needle will be pegged downscale below zero. A malfunction alarm will be caused by low or no sensing element current.
•(optional) The blue FAILURE light is illuminated in the event of failure of the detector element. The internal buzzer will also be activated with this type of failure.
•(optional) The amber CAUTION light is illuminated when the gas concentration rises above the adjustable CAUTION setpoint.
•The BUZZER toggle switch enables the internal buzzer to sound if the unit goes into alarm.
Note: This switch is a three position switch. For units that do not contain a "CAUTION ALARM" , this switch must be in the "full up" position to activate the
•The AUTO/MAN toggle switch determines the mode of the alarm relay. In the AUTO mode, the alarm relay will pull in and drop out automatically as the gas concentration goes above and below the setpoint. In the MANual position, the alarm relay will be in a latching mode such as to pull in if the gas concentration goes above the setpoint. The alarm system can be reset to normal by switching back to AUTO.
12 | TELEDYNE BROWN ENGINEERING |
Analytical Instruments