Teledyne MODEL T703 Manual Do Utilizador

 

 

This procedure details the steps for replacement of the UV source lamp in the optical bench assembly.  This 
procedure should be done whenever the lamp can no longer be adjusted as described in Section 10.2.3. 

1.  Turn the analyzer off. 

2.  Remove the cover from the analyzer. 

3.  Locate the Optical Bench Assembly (see  Figure 3-5) 

4.  Locate the UV lamp at the rear of the optical bench assembly (see  Figure 10-3) 

5.  Unplug the lamp cable from the power supply connector on the side of the optical bench. 

6.  Slightly loosen (do not remove) the UV lamp setscrew and pull the lamp from its housing. 

7.  Install the new lamp in the housing, pushing it all the way in.  Leave the UV lamp setscrew loose for 

now. 

8.  Turn the analyzer back on and allow it to warm up for at least 15 minutes. 

9.  Turn the UV detector gain adjustment pot (See Figure 10-3) clockwise to its minimum value.  The pot 

should click softly when the limit is reached. 

10.  Perform the UV Lamp Adjustment procedure described in Section 10.5, with the following exceptions: 

Slowly rotate the lamp in its housing (up to ¼ turn in either direction) until a MAXIMUM value (or 4600 

mVDC) is observed.   

  Make sure the lamp is pushed all the way into the housing while performing this rotation.   
 If 

the 

PHOTO_DET will not drop below 5000 mV while performing this rotation, contact T-API 

Customer Service for assistance.  

Once a lamp position is found that corresponds to a maximum observed value for PHOTO_DET, tighten 

the lamp setscrew at the approximate maximum value observed.   

If the value of PHOTO_DET is not within the range of 4400 – 4600 mV, adjust it accordingly. 

11.  Replace the cover on the analyzer.  

07223B DCN6378