Detcon DM-100 - Manual (Page 10)

Model DM-100
DM-100 Instruction Manual Rev. 3.3 Page 6 of 40
2. Installation
2.1 Hazardous Locations Installation Guidelines for Safe Use
1. Install the sensor only in areas with classifications matching the approval label. Follow all warnings
listed on the label.
Figure 10 Approval Label
2. For intrinsically safe Ex ia installations, follow the intrinsically safe installation guidelines shown in
control drawing #3993, Section 8.5.
3. For non-intrinsically safe Ex mb [ib] installations, ensure that the sensor is properly threaded into a
suitable explosion-proof rated junction box with a downward pointing female
3
/
4
" NPT threaded
connection. The sensor should be threaded at least 5 full turns until tight, with the locking screw
facing forward. Avoid use of Teflon Tape, or any type of non-conductive pipe thread coating on the
NPT threaded connection.
4. A good ground connection should be verified between the sensor’s metal enclosure and the junction
box. If a good ground connection is not made, the sensor can be grounded to the junction box using
the sensor’s external ground lug. Verify a good ground connection between the junction box and earth
ground.
5. Proper precautions should be taken during installation and maintenance to avoid the build-up of static
charge on the plastic components of the sensor (Splash Guard and Splash Guard adapter).
6. All input circuits of the DM-100 must be connected to current limiting devices (e.g. Fuses of 1500
amp breaking capacity) to ensure that the maximum input current does not exceed 62mA.
7. Do not substitute components. Substitution of components may impair the intrinsic safety rating.
8. Do not operate the sensor outside of the stated operating temperature limits.
9. Do not operate the sensor outside the stated operating limits for voltage supply.
10. These sensors meet ATEX standards EN60079-0, EN60079-18 and EN60079-11.
11. These sensors have a maximum safe location voltage of Um=60V.
12. These sensors pass dielectric strength of 500VRMS between circuit and enclosure for a minimum of 1
minute at a maximum test current of 5mA.