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Maintenance Teledyne API – Model T700 Dynamic Dilution Calibrator
232
8.2.3. UV SOURCE LAMP ADJUSTMENT
This procedure provides in detail the steps for adjustment of the UV source lamp in the
optical bench assembly. This procedure should be done whenever the PHOTO
REFERENCE test function value drops below 3000 mV.
1. Ensure that the calibrator is warmed-up and has been running for at least 30
minutes before proceeding.
2. Remove the cover from the calibrator.
3. Locate the optional Photometer (see Figure 3-6).
4.
Locate the UV detector g
ain adjust pot on the photometer assembly (see Figure
8-5
)
.
5. Perform the following procedure:
Additional adjustment can be made by physically
rotating the lamp in it’s housing.
To do this, slightly loosen the UV lamp
setscrew.
Next, slowly rotate the lamp up to ¼ turn in
either direction while watching the
PHOTO_DET signal.
Once the optimum lamp position is
determined, re-tighten the lamp
setscrew
Using an insulated pot adjustment tool, Turn the UV
DETECTOR GAIN ADJUSTMENT POT until the value of
PHOTO_DET is as close as possible to 4600.0 MV.
STANDBY A-CAL=0.000 LPM
<TST TST> GEN STBY SEQ SETUP
Make sure that the T700 is
in standby mode.
SETUP X.X PRIMARY SETUP MENU
GAS SEQ CFG CLK PASS MORE EXIT
SETUP X.X SECONDARY SETUP MENU
COMM FLOW VARS DIAG EXIT
SETUP X.X ENTER PASSWORD
818 ENTREXIT
Toggle these buttons to
enter the correct
PASSWORD
DIAG SIGNAL I/O
PREV NEXT ENTR EXIT
DIAG I/O 1) CONTROL_IN_2=OFF
PREV NEXT JUMP PRNT EXIT
DIAG 54) PHOTO_DET = 3342.2 MV
PREV NEXT PRNT EXIT
If a minimum reading of 3500.0 mV can not be reached,
the lamp must be replaced.
Continue pressing NEXT until...
6. Replace the cover on the calibrator.
06873B DCN6388