Thermo Scientific STD5000, User Manual

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Chapter 2
Installation & Wiring
Requirements equirements
1. Temperature: Ambient temperature must match specifications.
2. Mounting/Attitude: No restrictions.
3. Electrical input: Either a 4–20 or 10–50 mA dc current source.
Shielded cable should be used and shield should be grounded to unit
and earth ground. If cable contains shield and drain wire and metal
conduit is NOT used, ground shield. If used, metal conduit should be
grounded to earth ground. Refer to
Figure 2–4 for location of ground
screw.
4. Air supply: Clean, dry, oil-free instrument air within acceptable
pressure range for calibrated output.
a. Standard supply pressure should be 20 ±2 psi for 3–15 psig output
and 35 ±2 psi for 3–27, 6–30, or 1–17 psig outputs.
b. Supply pressure for standard high pressure configurations should be
35–100 psig (2.4–6.9 bar).
Note The air line should be purged of all debris, oil, and water. Thermo
Fisher strongly recommends using a coalescent external filter. Failures
attributed to instrument air supply contamination are not covered by the
warranty.
▲
Note If supply pressure is not within acceptable range, a regulator should
be installed (contact Thermo Fisher). ▲
Caution The instrument vents to atmosphere. The use of supply gas other
than air can create a hazardous environment. ▲
Thermo Fisher Scientific STD5000 & STD6000 User Guide 2-1