2
Site preparation at a glance
Site Preparation Checklist
❐ The site is well ventilated and free of corrosive materials and overhanging obstacles.
❐ Site temperature is within the recommended range of 20 to 27
°C.
❐ Site humidity is within the recommended range of 50 to 60%.
❐ Bench space is adequate for the GC with EPC: 50 cm x 58.5 cm x 50 cm (21 inch x 23 inch x 21 inch).
Bench space is adequate for the GC without EPC: 50 cm x 68 cm x 50 cm (21 inch x 26.7 inch x 21 inch).
❐ Bench can support the weight of the 6890 system. See page 7.
❐ Power receptacle is earth grounded. See page 8.
❐ Electrical supply meets all GC’s power requirements. See page 8.
❐ Voltage supply is adequate for oven type. Regular oven: 2,250 VA. Fast-heating oven: 2,950 VA.
❐ Gas supplies meet the requirements of your columns and detectors. See page 11.
❐ Gases meet purity requirements. All should be chromatographic-grade—99.9995% pure or better. Air should be zero-
grade or better. Detector air is not shared with valve actuators.
❐ Precleaned, 1/8-inch (or 1/4-inch) copper tubing is available for connecting inlet and detector gas supplies. See page 16.
❐ Inlet and detector gas supplies have two-stage pressure regulators installed.
Optional supplies:
❐ High quality traps for inlet and detector gas supplies—molecular sieve trap, hydrocarbon trap, and/or oxygen trap.
❐ Liquid N
2
or liquid
CO
2
(depending on requirements) available for cryogenic cooling.
❐ Supply of 1/4-inch, insulated copper tubing is available for liquid N
2
supplies, OR
1/8-inch, heavy-walled, stainless steel tubing is available for liquid CO
2
supplies.
❐ Insulation for liquid N
2
tubing is available.
❐ Pressurized clean air is available for value actuators. See page 22.
Before the GC arrives, make sure your
laboratory meets the following
environmental, weight, power, and gas
requirements. You should also refer to this
checklist for supplies that you need to
operate your GC, such as traps and tubing.
You can find more site preparation
information in this chapter.
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