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TELEDYNE INSTRUMENTS
460L Instruction Manual Maintenance
05228 Rev B 49
DCN 5164 PRINTED DOCUMENTS ARE UNCONTROLLED
9.3. UV Lamp Replacement
1. Disconnect power from the monitor and open cover.
2. Loosen, but do not remove, the two lamp set-screws (see Figure 9-5 below).
3. Unplug lamp from the UV lamp power connector on Sensor Module PCA.
4. Remove lamp from lamp housing. Dispose of lamp in accordance with local regulations
regarding disposal of Mercury containing waste.
5. Install new lamp in housing and plug into the UV lamp power connector.
6. Connect the ground lead of a voltmeter to TP4.
7. Connect the positive lead of voltmeter to TP10.
8. Reconnect power to the monitor.
9. The voltage on TP10 must read between –0.6 and –1.6Vdc. If this voltage is outside that
range, slowly rotate the lamp until the proper voltage is achieved, then tighten the lamp
set-screws.
10. Connect the positive lead of a voltmeter to TP11 (Measure Detector Voltage).
11. Adjust R26 until the voltage on TP11 is as high as possible within the range of 0.60 –1.00
volts.
Test Point
4
Test Point
11
Test Point
10
R26
Reset
button
UV Lamp Set Screws
UV Lamp
UV Lamp
Power
Connector
Figure 9-5 UV Lamp Set Screws and Calibration Test Points