to the National Electric Code. Some Ultima Gas Monitor
enclosures are rated for Class I, Division 1, Groups B, C and
D areas, while others can only be used in Groups C and D
areas. The larger, metal Approval Label on the Ultima Gas
Monitor (FIGURE 1-7) will indicate the rating of your
particular model and if it is approved for use in hazardous
areas. The second approval label indicates the unit is also
classified for Class I, Division 2 operation.
The Ultima Gas Monitor may be equipped with thread protectors;
all thread protectors must be removed before installation. All
units have cable harnesses. The unit must not be carried by
these harnesses; otherwise, unit will be damaged.
If the unit is to be mounted in a general-purpose or intrinsically
safe area, a cable grip can be used (FIGURE 1-8). A cable grip
cannot be used when the unit is installed in an area classified as
explosion-proof. Follow applicable wiring and installation codes.
Figure 1-6.
Sensor Label Identifying Sensor Type
Figure 1-7.
Label Indicating Enclosure Classification
Chapter 1, Set-up
1-5
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