Detcon DM-700 Instruction Manual Download Page 11

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Model DM-700

DM-700 Instruction Manual

Rev. 5.1

Page 5 of 51

2. Installation

2.1 ATEX Operational Guidelines for Safe Use

1. Install sensor only in areas with classifications matching with those described on the ATEX approval

label. Follow all warnings listed on the label.

Figure 7

ATEX Approval Label

2. Ensure that the sensor is properly threaded into a suitable flameproof rated junction box with a

downward pointing female ¾” NPT threaded connection. The sensor should be threaded up at least 5
full turns until tight, with the LED display facing forward (+/-15°). Minimize use of Teflon Tape, or
any type of non-conductive pipe thread coating on the NPT threaded connection.

3. 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. Also verify a good ground connection between the junction box and earth
ground.

4. Ensure that the Housing Bottom and plug-in sensor are installed during operation. The Housing Bottom

should be threaded tightly to the Intelligent Transmitter Module.  The locking setscrew (M3.5 x 0.6 6g6h
Stainless Steel Allen set screw cup point with yield strength of greater than 40,000 PSI, typical 80,000
PSI) should then be tightened down to keep the Housing Bottom from being inadvertently removed or
from  becoming  loose  under  vibration.    The  locking  setscrew  ensures  that Housing  Bottom  is  only
removable by authorized personnel with the use of special tools.  A M1.5 Allen Wrench is required. If
screw requires replacement, only an identical screw may be used.

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. These include the splashguard and splashguard adapter.

6. The screws holding down the retaining plate label are special fasteners of type Stainless Steel, Phillips

Pan-head Machine screw, M3 x 0.5 6g6h having yield strength of greater than 40,000 PSI, typical 80,000
PSI. If screw requires replacement, only an identical screw may be used.

7. Do not substitute components that are not authorized by the scope of the safety approval. This 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. The sensor power supply common (black wire) must be referenced to the metal enclosure body (ground)

during installation.

M/Y:

S/N:

RATED 11-30VDC, 50 mA MAX T4
T amb = -40° C to +50°C, IP66

M/Y:

0035

Um = 250V