User's Manual

M400E Ozone Analyzer Operator’s Manual General Troubleshooting & Repair of the M400E Analyzer
3. Remove the cover of the photometer and check for the presence of the following voltages on the UV
lamp power supply PCA (see Figure 11-16):

+4500 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.
13.9. TROUBLE SHOOTING THE IZS OPTIONS O
3
GENERATOR
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.
13.9.1. CHECKING THE O
3
GENERATOR UV LAMP POWER SUPPLY
The lamp power supply for the IZS options O
3
generator is the same assembly used for the photometer’s lamp
power supply. The method for checking it out is identical to that listed in Section 13.8.2 above.
04315 Rev. C1 255