Varian 450-GC, User Manual

Page: 153 / 205

Detectors – Pulsed Flame Photometric Detector (PFPD) Detectors – Pulsed Flame Photometric Detector (PFPD)
Page: Page: 358 358 User User Manual Manual 450-GC 450-GC Varian, Varian, Inc. Inc.
1. 1. Turn the Turn the column oven column oven OFF OFF to to stop the stop the oven oven fan. fan.
2. 2. Open the Open the column oven column oven door and door and wait for the wait for the column to column to cool to cool to room room
temperature (or to a temperature at which you temperature (or to a temperature at which you can comfortably handle the can comfortably handle the
column). column).
3. 3. Turn OFF Turn OFF the PFPD e the PFPD electronics and lectronics and oven pow oven power and a er and allow detecto llow detector to cool r to cool
to near room to near room temperature. temperature.
4. 4. Remove Remove the De the Detector co tector cover from ver from the top the top of the of the GC. GC.
5. 5. Before using Before using, thoroug , thoroughly clean hly clean the 9/64" the 9/64" Allen wrench Allen wrench, 1/4" wrenc , 1/4" wrench, Teflon h, Teflon
combustor extraction device and Teflon tweezer with combustor extraction device and Teflon tweezer with methanol or iso- methanol or iso-
propanol. Set these tools aside on a clean lab tissue. propanol. Set these tools aside on a clean lab tissue.
NOTE: NOTE: Dust and Dust and dirt inside the dirt inside the combustor can interfere combustor can interfere with emission with emission
and thereby lower the sensitivity of the PFPD. Therefore, never touch and thereby lower the sensitivity of the PFPD. Therefore, never touch
the internal parts of the PFPD with bare hands. Always use a clean lab
the internal parts of the PFPD with bare hands. Always use a clean lab
tissue, Teflon combustor extraction device, or Teflon tweezer to
tissue, Teflon combustor extraction device, or Teflon tweezer to
remove or replace detector parts. Place parts on a clean lab tissue as
remove or replace detector parts. Place parts on a clean lab tissue as
they are removed from the PFPD.
they are removed from the PFPD.
6. 6. Use the 9 Use the 9/64" Allen /64" Allen wrench to wrench to remove the remove the 2 Allen scre 2 Allen screws (Item 15) ws (Item 15) from the from the
top of the igniter cap (Item 3). Place the Allen screws on a top of the igniter cap (Item 3). Place the Allen screws on a clean lab tissue. clean lab tissue.
The igniter cap a The igniter cap and All nd All en screws may be very hot. Wa en screws may be very hot. Wait unt it unt il the igni il the igni ter ter
cap and Allen scr cap and Allen scr ews have cooled or use metal forceps ews have cooled or use metal forceps to remove the to remove the
Al Al len len sc sc rew rews f s f ro rom t m t he i he ign gnit it er c er cap. ap.
7. 7. Use the m Use the metal forceps etal forceps to lift the to lift the igniter cap igniter cap (item 3) from (item 3) from the detecto the detector tower r tower
(Item 4). (Item 4). Place the igniter cap bottom up Place the igniter cap bottom up on a clean surface (e.g., a clean on a clean surface (e.g., a clean
lab tissue). The top of the quartz combustor (Item 5) is visible in the center lab tissue). The top of the quartz combustor (Item 5) is visible in the center
of the detector tower.
of the detector tower.
The igniter ca The igniter cap may be very hot. Wait until p may be very hot. Wait until the igniter cap has cooled or the igniter cap has cooled or
use meta use metal forceps t l forceps t o remove the igniter cap from t o remove the igniter cap from t he dete he detector b ctor b ody. ody.
8. 8. Gently in Gently insert the sert the appropriat appropriate Teflon e Teflon combustor combustor extraction d extraction device into evice into the the
opening in the top of the opening in the top of the combustor. Wait 2-3 seconds for the Teflon combustor. Wait 2-3 seconds for the Teflon
combustor extraction device to seat, then lift the combustor extraction device to seat, then lift the quartz combustor from the quartz combustor from the
combustor support (Item 8). Place the quartz combustor on a combustor support (Item 8). Place the quartz combustor on a clean surface clean surface
(e.g., a clean lab tissue). (e.g., a clean lab tissue).
9. 9. Use the me Use the metal forceps tal forceps to remove to remove the top a the top aluminum cru luminum crunch wash nch washer (Item 13 er (Item 13))
from the detector tower. Discard this from the detector tower. Discard this used crunch washer. used crunch washer.