Quick Start Guide
19
August 2012
Instructions for hazardous area installations (E5 and E6)
Model numbers covered:
2120*****E5Y**, 2120*****E5T**, 2120*****E6Y**, 2120*****E6T**
(“*” indicates options in construction, function and materials).
The following instructions apply to equipment covered by CSA and FM explosion-proof
approvals:
1. The equipment may be used with flammable gases and vapors with apparatus
Class 1, Div 1, Groups A, B, C and D.
2. CSA and FM Explosion Proof approved versions of the 2120 are certified for use in
ambient temperatures of –40 °F to 176 °F (–40 °C to 80 °C), and with a maximum
process temperature of 302 °F (150 °C).
3. Installation of this equipment shall be carried out by suitably trained personnel, in
accordance with the applicable code of practice.
4. Inspection and maintenance of this equipment shall be carried out by suitably
trained personnel, in accordance with the applicable code of practice.
5. The user should not repair this equipment.
6. The certification of this equipment relies upon the following materials used in its
construction:
Body: Aluminum Alloy (ASTM B85 360.0) or 316 SST
Lid: Aluminum Alloy (ASTM B85 360.0) or 316 SST
Probe: 316 Stainless Steel, or Alloy C276 (UNS N10276) and Alloy C (UNS N10002)
Probe Filling: Perlite
Lid Seal: Silicone
If the equipment is likely to come into contact with aggressive substances, it is the
responsibility of the user to take suitable precautions that prevent it from being
adversely affected, thus ensuring that the type of protection is not compromised.
Aggressive Substances – e.g. acidic liquids or gases that may attack metals or
solvents that may affect polymeric materials.
Suitable Precautions – e.g. regular checks as part of routine inspections or
establishing from the material’s data sheet that it is resistant to specific chemicals.
The metallic alloy used for the enclosure material may be at the accessible surface
of this equipment; in the event of rare accidents, ignition sources due to impact
and friction sparks could occur. This shall be considered when the 2120 is installed
in locations that specifically require Class 1, Div 1 equipment.
7. It is the responsibility of the user to ensure:
a. The voltage and current limits for this equipment are not exceeded.
b. That the joint requirements between the switch and the vessel tank are
compatible with the process media.
c. That the joint tightness is correct for the joint material used.
d. That only certified cable entry devices will be used when connecting this
equipment.
e. That any unused cable entries are sealed with suitably certified stopping plugs.
8. The switch fork is subjected to small vibration stresses as part of its normal
function. As this provides a partition wall, it is recommended that the fork should
be inspected every 2 years for signs of defects.
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