VICI D-4-I Quick Start - Manual

&
Analytical
Components
Systems
Pulsed Discharge Detector
Model D-4-I
Quick Reference Guide
Detector performance is adversely affected by the
presence of impurities in the gas stream. To minimize
the chance of this occurring:
1. Always use the helium purifier.
2. Never use copper or plastic tubes,
even before the helium purifier.
3. Never use flow controllers containing
polymers or lubricant.
4. Never use pipe fittings or teflon tape
downstream of the purifier.
You will need:
• Helium
99.9999% purity (“six nines”)
Air Liquide part number: ValGas 4
• Gas regulator
Ultrahigh purity, with stainless steel
diaphragm
Valco part number: TGA-422-580
• Valco Helium Purifier
(included with the detector system)
Valco part number: HP2
• Stainless steel tubing and
Fittings with gold ferrules
(consult the Valco catalog)
• Restrictor
(included with the detector system)
Valco part number: TGA-R-30F60P
GAS CHROMATOGRAPH
TEE
(ZT1)
DISCHARGE GAS
(99.9999% He)
TGA-R-30F60P
RESTRICTOR
(30 mL/min minimum)
VENT
COLUMN
INLET
DISCHARGE GAS
INLET
VENT
COLUMN
SAMPLE
IN
HELIUM
PURIFIER
Leave column inlet
plugged until flow
rate is set. (See
“Initial Power-Up”
on next page.)
General Precautions:
• Never run the detector without discharge gas. To insure a continuous supply of discharge gas, always
change the gas bottle when it reaches 500 psi.
• Never bake out a column while it is connected to the detector.
• Detector lifetime is shortened in the Ar/Kr PID mode. To maximize detector lifetime, turn off the discharge
power when the GC is not actually analyzing samples.
Gas connections