Tekran Measure/Adjust Lamp and Detector Voltages

 

Purpose:  Within the 2537 analyzer there are two major adjustment voltages.  This procedure will give instructions on how to check the voltage and adjust if necessary.

 

Required Equipment:  Digital Volt Meter (DVM)

           Precision flat blade screwdriver

                                                                           

 

Reference:  SOPMAN Pages XX-XX

 

 

Checking and/or Adjusting the Detector Voltage

 

  1. Make sure the instrument is in RUN and has been in run for a minimum of 30 minutes.  It is best to check and/or adjust the detector voltage when the system is Hg(0) RUN mode.
  2. Use the  ` a  to change the display on the 2537 to RUN.CURRENT.  This menu will display the detector voltage.

 

 

  1. The detector voltage is on the right side of the screen and should always be in decimal form.  The voltage should be no less than 0.130 and no more that 0.180.  If the detector voltage is out of tolerance an adjustment needs to be made.
  2. To adjust the detector voltage, unlock the OFFSET adjustment on knob on the front of the 2537 and turn it clockwise to increase the voltage. 
  3. The voltage should be adjusted to an optimum voltage of 0.157 VDC.
  4. Lock the OFFSET adjustment knob.
  5. This completes the check and/or adjustment of the Detector Voltage.

 

 

 

Checking and/or Adjusting the Lamp Voltage

  

  1. Make sure the instrument is in RUN and has been in run for a minimum of 30 minutes.  It is best to check and/or adjust the lamp voltage when the system is Hg(0) RUN mode.
  2. Take the cover off of the 2537.
  3. With the cover off locate the Lamp Driver Board.

 

 

  1. On the lamp driver board locate the Lamp Adjustment Potentiometer, GND (BLK) test point and LDR (Red) test point.

 

 

  1. Attach the DVM to the two test points.  The DVM should be set to DC volts. 
  2. The volt meter should be reading a voltage of 9 to 12 VDC.  If the voltage is out of this tolerance an adjustment will need to be made.
  3. To adjust the lamp voltage use a precision screwdriver and adjust the Lamp Adjustment Potentiometer.  The optimal voltage on the lamp is 9.5 volts.
  4. Once the adjustment has been made and the voltage is reasonable the procedure is complete.