Appendix E - Hazardous Area Approvals - GE Bently Nevada 1900/27 Operation And Maintenance Manual

9. Appendix E - Hazardous Area
Canadian Standards Association Approvals
The 1900/27 vibration monitor is CSA NRTL/C approved for Class 1, Division 2,
Groups A,B,C,D hazardous areas when installed per drawing 105352.
The table below lists the approval drawings in the order they appear.
When the accelerometer is used with barriers in an
intrinsically safe installation, the transducer common
is connected to the barrier's earth ground. Since the
transducer common is also connected to the power
input common inside the 1900/27, care must be
taken to avoid a ground loop which could arise from
connecting the power input common to earth
ground. Note that the approval drawings for the
89129 and 190520 Accelerometers require that the
total earth ground loop impedance at the barrier be
less than one ohm.
DRAWING TITLE
1900/27 Installation
Approval Drawing
CSA Intrinsically Safe
Approval Drawing
Section 9 - Appendix E - Hazardous Area Approvals
Approvals
APPLICATION NOTE
DRAWING NUMBER
124919
107585
NUMBER OF SHEETS
2
1
49