Teledyne MODEL T703 Manual Do Utilizador

The only significant components of the O

3

 generator that might reasonable malfunction is the power supply 

assembly for the UV source lamp and the lamp itself. 

 

 

It is not always possible to determine with certainty whether a problem is the result of the UV Lamp or the Lamp 
Power Supply, however, the following steps will provide a reasonable confidence test of the Lamp Power 
Supply. 

1. Make 

sure 

the 

calibrator is in STANDBY mode. 

2.  Unplug the cable connector at P1 on the Lamp Power Supply and confirm that +15VDC is present 

between Pins 1 and 2 on the cable connector.  

3.  If this voltage is incorrect, check the DC test points on the relay PCA as described in Section 11.4.3. 

4.  Remove the cover of the photometer and check for the presence of the following voltages on the UV 

lamp power supply PCA (see Figure 9-20): 

  +800 mVDC  ±  10 mVDC between TP1 and TP4 (grnd) 

  If this voltage is incorrect, either the UV lamp power supply PCA is faulty or the I

2

C bus is not 

communicating with the UV lamp power supply PCA. 

  +5VDC between TP3 and TP4 (grnd) 

  If this voltages is less than 4.8 or greater than 5.25 either the 5 VDC power supply or the UV lamp 

power supply PCA are faulty. 

  If the above voltages check out, it is more likely that a problem is due to the UV Lamp than due to the 

Lamp Power Supply.  

  Replace the Lamp and if the problem persists, replace the Lamp Power Supply. 

07223B DCN6378