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3.1
GENERAL
Examine the instrument for possible shipping damages. IMPORTANT: If for any reason it is determined that the equipment
should be returned to the factory, please notify the nearest Robertshaw Industrial Products sales representative prior to ship-
ment. Each unit must be properly packaged to prevent damage. Robertshaw assumes no responsibility for equipment damaged
in shipment due to improper packing.
Choose the location in accordance with good instrument practice, avoiding extremes of temperature, humidity and vibra-
tion. (See SPECIFICATIONS, Section II.)
The Vibraswitch, Model EURO 366G, malfunction detector may be located in any outdoor or indoor area according to
ATEX Classification and housing Protection information contained in Section II, Specifications. In locations where mois-
ture condensation within junction boxes is a problem, for Vibraswitches with a SPDT switch (Table 1, Designation A) a two
watt resistor may be placed across terminals 6 and 8 inside the Vibraswitch enclosure and wired to a source of continu-
ous voltage to provide heat within the enclosure to reduce condensation effects. See Table 3-1 for Space heater value.
Space heater resistors cannot be readily installed in the field in Vibraswitches with a DPDT switch (Table 1, Designation
D).
3.2
MOUNTING
Figure 3-1 illustrates the methods of mounting on various pieces of equipment. Figures 3-2 and 3.3 show the mounting
dimensions and external wiring for the Vibraswitch Model EURO 366G.
The vibration sensitive axis of the Vibraswitch is perpendicular to its mounting base. Therefore, the Vibraswitch must be
mounted in a plane that will detect the vibratory motion for which protection is desired. The Vibraswitch may be
mounted at any location along the length of machines containing rotating shafts that are horizontal and parallel to the
base of machine: the preferable location being in line with the rotating shaft. Do not mount the Vibraswitch perpendicu-
lar to the ends of the rotating shafts unless the end-play or end-thrust measurement is desired. Normally, bent shafts,
unbalances on the rotating mass of the shaft, worn bearings, and other anomalies are detected near the bearing housing
and at the right angles to the shaft.
The Vibraswitch may be mounted in any position between the side (vertical) or the top (horizontal) of bearings or ma-
chine housing. It should be noted that when mounting Vibraswitches on top (horizontal position) of equipment the vibra-
tion measurement range is stated in the Specification Section. However, when the Vibraswitch is mounted on a side posi-
tion (90° from horizontal), 1 g is subtracted from the measurement range of the instrument.
If mounting bracket assembly is used to mount the Vibraswitch due to an irregular mounting surface, it must be con-
structed of steel having sufficient thickness and properly reinforced so that mechanical resonance are not introduced;
usually ½" steel plate is satisfactory if the dimensions of the bracket are not large. It is extremely important that all four
corners of the Vibraswitch, as well as the mounting assembly, be rigidly secured to the machine. Exact location is not criti-
cal as the adjustment procedure of the Vibraswitch automatically accounts for the normal vibration at the location.
The Vibraswitch, when properly adjusted, trips on a relative increase in vibration.
When installing the Vibraswitch on existing equipment where several convenient mounting positions are available, it is
advisable to check the existing vibration level at each possible position before permanently mounting the unit. The
Vibraswitch can be used to measure existing vibration by holding or clamping it against the running machine and
determining the trip point as described under "ADJUSTMENT" in this manual. Should normal vibration exceed the range
of the Vibraswitch, it is recommended that consideration be given to Vibra-Tel, Model 566, Continuous Monitor Unit
which is capable of monitoring higher g-levels. Please note that the Model 566 does not have CE or ATEX certification at
this time.
SECTION III
INSTALLATION
Page 8
909GF299
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