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Control Drawing #4010
MKE-5-IS General Dimensions
1 Sheet
Control Drawing #4011
MKE-5-IS Indicator Label Drawing
1 Sheet
Control Drawing #4013
MKE-5-IS Inst. and Wiring Diagram
7 Sheets
Control Drawing #7213
Approved SAW-IS Body Type SAW-LC-08215, Label Drawing
1 Sheet
Control Drawing #7214
Approved SAW-IS Body Type SAW-LC-16033, Label Drawing
1 Sheet
Control Drawing #7334
Approved SAW Load Cells Installation and Wiring Diagram
2 Sheets
FACTORY MUTUAL APPROVAL AND INTRINSIC SAFETY
The MKE-5-IS SAW Scale System has been rated intrinsically safe by Factory Mutual only when used with specific
intrinsically safe Arlyn load cells and the installation is performed by a qualified technician who conforms to the
guidelines described in this manual. Consult the chapter titled “Installation and Wiring” along with the control
drawings in the back of this document for information pertaining to the installation and wiring of the approved
SAW Load Cells.
MKE-5-IS (a). Digital Weight Indicator System
Intrinsically Safe for use in Class I, II and III, Division 1, Groups A, B, C, D, E, F and G; Temperature Class
T3C Tamb = -25°C to +40°C;
Temperature Class T3B Tamb = -25°C to +60°C in accordance with Control
Drawing No.4013; Intrinsically safe apparatus for use in Class
I, Zone 0, AEx ia IIC T3 Ta = -25°C to+60°C;
in accordance with Control Drawing No. 4013; Nonincendive for use in Class I, II, III, Division
2, Groups A,
B, C, D, E, F & G; Temperature Class T6 Tamb = -25°C to +60°C; in accordance with Control Drawing
No.4013; Hazardous
(Classified) Locations.
SAW-IS Load Cells (a.k.a SAW-LC-IS)
Intrinsically Safe for use in Class I, II and III, Division 1, Groups A, B, C, D, E, F and G; Temperature Class T3C Tamb = -25°C to +40°C;
Temperature Class T3B Tamb = -25°C to +60°C in accordance with Control Drawing No.7334; Intrinsically safe apparatus for use in Class
I, Zone 0, AEx ia IIC T3 Ta = -25°C to+60°C; in accordance with Control Drawing No. 4013; Nonincendive for use in Class I, II, III, Division
2, Groups A, B, C, D, E, F & G; Temperature Class T6 Tamb = -25°C to +60°C; in accordance with Control Drawing No.7334; Hazardous
(Classified) Locations.
Intrinsic Safety, Limitations and Restrictions
The following items represent limitations and restrictions concerning using this scale system as a FM approved intrinsically safe
system. All items on this list must be adhered to for FM approval to be valid. Disregarding any of these items would violate intrinsic
safety and FM approval, possibly resulting in serious death.
1.
The installation needs to be performed by a qualified technician who is familiar with National Electrical Code and RP 12.6
(Recommended Practice) requirements for installation of equipment in hazardous areas. Consult NEC Article 504, Intrinsically
Safe Systems, published through the Instrument Society of America.
2.
Only Arlyn, FM approved, SAW Load Cells may be used. Only one SAW Load Cell per Platform per scale maybe connected.
3.
The installation technician must conform to all instructions and control drawings in this manual.
4.
The indicator and SAW Load Cell must have the appropriate labeling that complies with the control drawings.
5.
All wiring and connections must comply with the National Electrical Code (NEC).
6.
The cable type and length limitation must comply with the control drawings.
7.
No modifications of this system may be made in the field. Component level repair is not permitted on Factory Mutual
approved equipment. It is mandatory to return the unit to Arlyn Scales for repair.
8.
Removal of the battery is not allowed when the scale is located in a hazardous area. The indicator must be removed from its
mounting bracket and taken to a safe area. Only then can the battery cover be removed and the battery recharged or
replaced.
9.
If using external power source to power the scale system, the power source must be rated for intrinsic safety and must
comply with the entity parameters associated with this scale system. Alternatively, if the power source is through a safety
barrier, the barrier must match the intrinsic safety parameters of the scale system.
10.
To avoid the possibility of static buildup, the indicator housing must not be cleaned or rubbed down with a dry cloth while it is
located in a hazardous area