4 Operation

Model 3190

 

 

 

 

 

 

 

 

 

2.Within 5 seconds, press either the or button to raise or lower the displayed value, as required, until the display reads the desired concentration.

4.4.2 LO Alarm

Setting the LO Alarm sets the value BELOW which the LO alarm will activate. To set the LO Alarm:

1.Press the SET LO ALARM Function button once.

2.Within 5 seconds, press either the or button to raise or lower the displayed value, as required, until the display reads the desired concentration.

4.4.3 Sensor Fail Alarm

The SENSOR FAIL alarm triggers if, during calibration, the raw cell output for the given oxygen level is too low. (See Calibration Characteristics in Chapter 2.) Should this alarm trigger, The ALARM indicator below the SET function buttons will start blinking. Replace the cell before proceeding.

4.5Selecting a Fixed Range or Autoranging

The Model 3190 can operate in fixed high, fixed low, or autoranging mode. To change modes:

1.Press and then release the SET HI RANGE and the SET LO RANGE buttons simultaneously.

2.Within 5 seconds, press either the or button until Auto, Lo, or Hi displays on the LCD, as desired.

After about three seconds, the analyzer resumes monitoring in the selected range mode.

NOTE:If the concentration exceeds 9,999 ppm oxygen, the analyzer will automatically switch to the Calibration Range, EVEN THOUGH INSTRUMENT IS IN THE FIXED RANGE MODE.

4.6Calibration

Preliminary—If not already done: Power up the Analyzer and allow the LED reading to stabilize. Set the Alarm setpoints and the fullscale ranges to the desired values.

4-4

Teledyne Analytical Instruments

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Teledyne 3190 manual Selecting a Fixed Range or Autoranging, Calibration, LO Alarm, Sensor Fail Alarm