Robertshaw VIBRASWITCH EURO366G User manual

INSTRUCTION MANUAL
VIBRASWITCH
MODEL EURO366G
Industrial Products Division
1602 Mustang Drive
Maryville, Tennessee 37801
Phone: [phone] Fax: [phone]
http://www.robertshawindustrial.com
INSTRUCTION MANUAL NUMBER
909GF299

909GF299
Page 2
RECORD OF CHANGES
Revision
Design
Engineer’s
Approval
Engineering
Manager’s
Approval
Approval
Date
COS
Number Brief Description
A P. Kronau Brien Evans 30JUL08 96644 Production release

909GF299
Page 3
TABLE OF CONTENTS
SECTION PAGE
I DESCRIPTION.................................................................................................. 4
1.1 Description.................................................................................................................................. 4
1.2 Model Identification ................................................................................................................ 4
II SPECIFICATIONS.............................................................................................. 7
2.1 Environmental............................................................................................................................ 7
2.2 Performance............................................................................................................................... 7
III INSTALLATION ................................................................................................ 8
3.1 General......................................................................................................................................... 8
3.2 Mounting..................................................................................................................................... 8
3.3 Space Heater .............................................................................................................................. 10
3.4 Wiring........................................................................................................................................... 10
3.5 Terminal Block........................................................................................................................... 11
3.6 Mounting Dimensions ............................................................................................................. 12
IV OPERATION .................................................................................................... 13
4.1 Operation.................................................................................................................................... 13
4.2 Adjustment of Operating Setpoint ...................................................................................... 14
V MAINTENANCE ............................................................................................... 17
5.1 Troubleshooting........................................................................................................................ 17
VI ATEX............................................................................................................... 19
6.1 Special ATEX Use and Maintenance.................................................................................... 19
LIST OF ILLUSTRATIONS
FIGURE PAGE
3-1 External Wiring for Vibraswitch Model EURO 366 .................................................................. 9
3-2 Methods of Mounting the Vibraswitch Model EURO 366..................................................... 11
3-3 Mounting Dimensions for Vibraswitch Model EURO 366 “EFSRC”..................................... 11
4-1 Operating Principle for the Vibraswitch Model EURO 366................................................... 13
4-2 Setpoint Adjustment......................................................................................................................... 15
4-3 Setpoint Alarm Settings................................................................................................................... 16

909GF299
Page 4
SECTION I
DESCRIPTION
1.1 DESCRIPTION
The Vibraswitch, Model EURO 366G, is designed to protect rotating, reciprocating, or similar equipment against serious damage from
malfunctions that can be detected as an increase in vibration. A reset and holding coil is provided, in the DC/AC voltage as specified so
that accidental shutdowns on start can be prevented.
The Vibraswitch, Model EURO 366G, may be used in conjunction with the Vibraswitch Monitor, Model 563A. The Monitor is a solid-
state electronic system designed to "sort-out" false signals received by the Vibraswitch so that Alarm and/or Shutdown of the operating
machine will not result from false, transient disturbances. Please note that the Model 563A does not have CE or ATEX certification at
this time.
1.2 MODEL IDENTIFICATION
Specify and order instrument models in accordance with the description and variations listed in each table.
ORDERING INFORMATION:
SWITCH CONTACTS - SEE TABLE 1
EURO 366G
ENCLOSURE FINISH - SEE TABLE 4
REMOTE RESET - SEE TABLE 2
SPACE HEATER - SEE TABLE 7
ENCLOSURE CONDUIT ENTRANCES - SEE TABLE 6
SWITCH RATING - SEE TABLE 5
ENCLOSURE TYPE - SEE TABLE 3
KEY MODEL NUMBER
A2H8AXX
Table A - Key Model Number
Model Number Description
EURO 366G Electric Vibration Detector. Cast Iron Enclosure
Explosion Proof ATEX II 2GD Ex d IIC T6 tD A21 IP66 T85°C
Contacts actuate when Setpoint is exceeded.
Range: from 0 to 4,5G

909GF299
Page 5
Table 1 - Switch Contacts
Designation Description
ASPDT - Single Pole, Double Throw load contacts.
D DPDT - Double Pole, Double Throw load switches.
Table 2 - Remote Option Reset
Designation Description
0No Reset Coil
2 24 Volt DC reset coil voltage
4 48 Volt DC reset coil voltage
7 120 Volt DC reset coil voltage
8 120 Volt AC reset coil voltage
9 240 Volt AC reset coil voltage
Table 3 - Enclosure Type
Designation Description Remarks
W CS-INVR366 .......................T.cable 105°C & T.amb. –40 to +60°C
Table 4 - Enclosure Finish
Designation Description
3 Thermoset Polymer Powder, Embossed (Orange, RAL 2004)
Table 5 – Switch Type
Designation Description Protection Remarks
A
7,0 Amp max. 460 VAC max. NI
0,5 Amp at 120 VDC
1,0 Amp at 48 VDC
2,0 Amp at 24 VDC
IP50
Use with Table 1,
Designation A, only
E 5,0 Amp at 250 VAC max. NI
5,0 Amp at 30 VDC max. IP50 Use with Table 1,
Designation D, only
H¼
0,1 Amp max. at 250 VAC
0,1 Amp max. at 125 VAC
0,1 Amp max. at 30 VDC
5,0 mA min. 6 VDC max.
2,0 mA min. 12 VDC max.
1,0 mA min. 24 VDC max.
IP67 (Sealed) Use with Table 1,
Designation D, only
¼Gold Plated Contacts, suitable for intrinsic safety Applications

909GF299
Page 6
Table 6 – Enclosure Entrances
Designation Description Remarks
X ¾’’ NPT 6125 entrances. One with ¾’’ NPT Plug See Note 1
Table 7 - Space Heater
Designation Description
F 24 VDC 2 Watt
G 48 VDC 2 Watt
H 120 VAC 2 Watt
L 120 VDC 2 Watt
M 240 VAC 2 Watt
X No Space Heater
NOTE 1 – PLUG MAY BE DISCARDED, IF NOT REQUIRED.

909GF299
Page 7
SECTION II
SPECIFICATIONS
2.1 ENVIRONMENTAL
Housing ...................................................................................................................................................................... Cast Iron Q200 ISO ISO 185
Weight Model CS-INVR366G........................................................................................................................................................................ 5,5 Kg
Enclosure Classification....................................................................................................................................Ex d IIB/CT6-tD A21-IP66 T85°C
Group II & Category 2G/2GD
Ambient T. -20ºC+40ºC or -40ºC+60ºC
Certificate No. ......................................................................................................................................................................... CESI 03 ATEX 186
Enclosure Protection .......................................................................................................................................................................................... IP66
Enclosure Sealing.......................................................................................................................................................................... Neoprene O-ring
Location: Mounting......................................................................................................................................................... Outdoors, Unprotected
External Bolts...................................................................................................................................................................................... Stainless Steel
Nameplate........................................................................................................................................................................................... Stainless Steel
Conduits................................................................................................................................................................................................. 2 x 3/4” NPT
Enclosure Finish .............................................................................................................................................. Electrolytic Zinc Plated ISO 2081
Thermoset Polymer Powder Coated, Embossed (Orange, RAL 2004)
Ambient Temperature Limits ....................................................................................................................................................... -40°C to +60°C
Humidity.................................................................................................................................................... To 95% Relative Humidity @ +37,7°C
Shock ................................................................................................................................................................................ 40 g @ 11 ms. maximum
2.2 PERFORMANCE
Vibration Measurement Range............................................................................................................................. 0 to 4,5 g from 0 to 300 Hz
Setpoint Range......................................................................................................................................... 0 to 4,5 g when mounted horizontal
0 to 3,5 g when mounted vertical
Setpoint Adjustment............................................................................................................................................................................. 1 turn per g
Accuracy............................................................................................................................................................... ±5% of full range (0 to 300 Hz)
Ambient Temperature Effect......................................................................................................................... ±10%/100°F (55,5°C) maximum
Reset Coil
Standard Voltages ...................................................................................................................................................................... 24 VDC, 0,5 A
48 VDC, 0,2 A
120 VDC, 0,14 A
120 VAC, 0,3 A, 50/60 Hz
240 VAC, 0,3 A, 50/60 Hz
Duty Cycle (24 VDC, 48 VDC, 120 VDC, 120 VAC).................................................... 4 minutes max. ON -10 minutes min. OFF
Duty Cycle (240 VAC).......................................................................................................... 1 minute max. ON -10 minutes min. OFF

909GF299
Page 8
SECTION III
INSTALLATION
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.

909GF299
Page 9
Figure 3. 1 Methods of Mounting the Vibraswitch
RECOMMENDED
RECOMMENDED
RECOMMENDED
RECOMMENDED RECOMMENDED
RECOMMENDED
RECOMMENDED
DIESEL ENGINE - COMPRESSOR UNIT
PUMPING UNIT
HORIZONTAL OPPOSED
RECIPROCATING COMPRESSOR
CENTRIFUGAL PUMP ENGINE - GEAR- CENTRIFUGAL COMPRES-
COOLING TOWER FAN
RECIPROCATING COMPRESSOR “Y” TYPE

909GF299
Page 10
3.3 SPACE HEATER
In some outdoor installations, it may be necessary to install a space heater to prevent moisture condensation.
For Vibraswitches with a SPDT switch (Table 1, Designation A) a small conventional carbon 2 watt resistor
should be installed across terminals 6 and 8 in the detector. Proper values are shown in Table 3-1. Space heat-
ers cannot be readily installed in the field in Vibraswitches with a DPDT switch (Table 1, Designation D).
Table 3-1. Space Heater Resistor Values
VOLTAGE
(DC or AC)
SPACE HEATER RESISTOR
(OHMS)
460
240
120
48
24
220.000
56.000
12.000
2.000
560
3.4 WIRING
The Vibraswitch, Model EURO 366G, is equipped with two threaded hubs for ¾” UNI-6125-74 conduit.
When the vibration amplitude is large (i.e., greater than 5 mils) it is good practice to use a short length of flexible conduit
to serve as an insulator between the rigid conduit and the Vibraswitch. Wiring into the unit should be done with #18
stranded wire although #14 can be used where necessary. The Vibraswitch was not designed for wiring with heavy solid
wire. However, where necessary to use a heavier wire, as in low voltage DC units, a junction box near the Vibraswitch
should be used.
NOTE
The instrument housing must be sealed at the conduit outlets with a suitable com-
pound or “trap” to prevent infiltration of moisture-laden air or corrosive gases into
the housing.
NOTE
All instrument installation wiring must be done in accordance with local codes and
commonly accepted practices.
NOTE
a) The products installed in places with environment temperature of 40°C, must have
Tcable 90°C indication. This means that the Buyer and/or the User must use a connec-
tion cable having maximum service temperature not lower than 90°C.
b) The products installed in places with environment temperature of 55°C, must have
Tcable 105°C indication. This means that the Buyer and/or the User must use a connec-
tion cable having maximum service temperature not lower than 105°C.
To avoid unnecessary difficulty in wiring the unit, the following procedure should be followed in detail:
a. When installing conduit and mounting the Model EURO 366G, it is recommended that the cover be left on the unit.

909GF299
Page 11
b. If the Model EURO 366G is to be mounted in unprotected or dusty areas, a dust-tight or water-tight seal should be
made at the conduit entrance.
c. With all mounting complete, remove cover and insert wires through conduit entrance with sufficient length to reach
the terminal block.
d. Strip wires back approximately 6,4 mm (1/4") and install solderless terminals.
e. Connect wires to terminals as shown in Figure 3-1.
3.5 TERMINAL BLOCK
OPTIONAL
SPACE HEATER
R ES ET
COIL
C
O
M
N
O
N
C RESET
C O I L
C
O
M
N
O
N
C
C
O
M
N
O
N
C
GN D G ND
CUSTOMER TERMINAL CONNECTIONS
MODEL EURO 366G - A MODEL EURO 366G - D
MODEL EURO 366G - D with Space Heater
C
O
M
N
O
N
C
C
O
M
N
O
N
C RESET
COIL
OPTIONAL
SPACE HEATER
GND
Figure 3-2. External Wiring for the Vibraswitch, Model EURO 366.
NOTES:
1. Switch shown in normal or reset position - reverses on actuation from increased vibration.
2. Standard Coil Voltages: 24 VDC, 48 VDC, 120 VDC and 120 VAC (240 VAC Optional).
3. Heater resistor installed, when required, to prevent condensation in housing where climate conditions require.
(Supplied only when specified)
4. If Manual Reset Only is desired, do not apply power to the reset coil.

909GF299
Page 12
3.6 MOUNTING DIMENSIONS
DON'T OPEN WHEN ENERGI ZED/DON'T OPEN IF AN EXPLOSIVE ATMOSPHERE MAY BE PRESENT
Tcable 105°C Tamb. -40/60°CTcable 90°C Tamb. -20/40°C
Reset:
Model: EURO366
Switch Contacts:Serial No.:
R
Vibraswitch
Year of
Construction
Figure 3-3 Mounting Dimensions for the Vibraswitch,
Model EURO 366G Model “CS-INVR366G” Enclosure.

909GF299
Page 13
SECTION IV
OPERATION
4.1 OPERATION
The Vibraswitch, Model EURO 366G (Refer to Figure 4-1), is sensitive to vibration in a direction (the sensitive axis) per-
pendicular to its mounting base. It contains a vibration detecting mechanism, which also functions as a “mechanical am-
plifier”, to activate a snap-action switch when the selected level of vibration is exceeded and the detecting mechanism
“trips”.
SET POINT
A
DJUSTMENT SCREW
COMPRESSION
SPRING
LE
A
FSPRING
A
RM
A
TURE
SENSITIVE
A
XIS RESET BUTTON
L
A
TCHING M
A
GNET
HOLDOWN M
A
GNE
T
A
IR G
A
P
STOP PIN
RESET COIL
FLEXURE PI
V
OT
MICROSWITCH
Figure 4-1 Operating Principle for the Vibraswitch, Model 366G.
The detecting mechanism consists of an armature suspended on a flexure pivot which is restrained from motion by a
permanent magnet (the hold-down magnet). In the “armed” condition, the armature is held against the stop pin by the
hold-down magnet. The stop pin maintains a precise air gap between the armature and the hold-down magnet. On the
opposite end of the armature, the compression spring provides an adjustable force to oppose the force of the hold-down
magnet. Whenever the peak vibration inertial force (mass x acceleration) plus the adjustable compression spring force ex-
ceeds the force of the holding magnet, the armature is released and is pulled into the latching magnet (“tripped” posi-
tion). Simultaneously, it activates the snap-action switch. This detecting mechanism has a uniform response from 0 to 300
Hz over a range of 0 to 4.5 g’s.
The mechanism may be reset to the “armed” position manually (locally) or electrically (remotely). Manually, depress the
reset button to move the armature away from the latching magnet (“tripped” position) until it is held against the stop pin
(“armed” position). Electrically, the reset coil may be activated to pull the armature into the “armed” position against the
stop pin.
A reset and holding coil is provided, in the DC/AC voltage as specified, so that accidental shutdowns on starts can be pre-
vented. External time-delay circuits are required to maintain voltage at the holding coil during the startup period and
then release this voltage when operation is normal. At full voltage, the reset coil should not be energized for more than
four minutes to prevent overheating. Then, the reset coil must be de-energized for a period of 10 minutes before re-
energizing. For longer hold-in requirements the reset coil should be energized at a full voltage and then held-in at one-
half the rated voltage.

909GF299
Page 14
The Vibraswitch, Model EURO 366G, may be used in conjunction with the Vibraswitch Monitor, Model 563A. The monitor
is a solid-state electronic system designed to “sort-out” false signals received by the Vibraswitch so that Alarm and/or
Shutdown of the operating machine will not result from false, transient disturbances, but any continuous vibration level
which exceeds the Setpoint of the Vibraswitch will cause Alarm or/and Shutdown. Examples of transient disturbances are
the closing of pipeline check valves on pumping applications, the start-up of additional pumps on a line, and the initial
start-up of various operating machines. These disturbances may cause the Vibraswitch to “trip-out” if the vibratory shock
level is in excess of its setpoint. Please note that the Model 563A does not have CE or ATEX certification at this time.
4.2 ADJUSTMENT OF OPERATING SETPOINT
The operating setpoint for the Vibraswitch varies with the type of machine and its location (measurement point) on the
machine. The setpoint adjustments suggested in this instruction manual are for machines which are functioning in a
“good” or “normal” condition. This method follows the concept of vibration tolerance for the machine and in this case is
dependent upon an individual who is experienced in the operation of the machine to define the vibration as “normal”,
“fair”, “slightly rough”, etc. These various degrees of machine vibration are, therefore, based on individual’s physical per-
ception between normal and abnormal roughness while the machine is operating.
It is agreed that this method can lead to differences in the classification of degree of vibration between individual ob-
servers. It is Robertshaw’s contention, and experience bears out this conclusion, that if the machine is operating satisfac-
torily as previously defined and the acceleration as measured by the Vibraswitch is within certain limits, the settings as
outlined in the instructions will offer protection to the machine and prevent catastrophic failure.
For example, assume that a relatively new machine which, in the experience of the operator, is operating as “smooth” or
“good” regarding vibration and the Vibraswitch measures this acceleration level to be 0.25 g above its static condition
(zero). Experiences suggests that a reasonable level for alarm conditions would be a minimum of twice this value or 0.5 g.
It must be acknowledged that such a definition or upper vibration limits (alarm condition) on the machine may not have
adequately defined the upper tolerance limit of the machine before major repairs or excessive machine damages occurs.
It does, however, define a limit which, in our experience, has proven to be safe. As the user becomes more adept in using
the Vibraswitch as a monitoring device, his experience may dictate an higher setpoint more in keeping with the experi-
ence he has gained on the particular machine.
The Model EURO 366G Vibraswitch is adjusted by a simple three-step procedure. In making these measurements the
cover must be removed to gain access to the Setpoint adjusting screw. (Ref. Figure 4-2.)
a. Zero Vibration Level Measurement
With the equipment on which the Vibraswitch is mounted not operating, back off the Setpoint adjusting screw
counterclockwise (CCW) two turns and press the reset button. Then turn the Setpoint adjusting screw slowly clock-
wise until actuation occurs (the armature assembly is against the latch magnet, Figure 4-1). This is the zero vibra-
tion point, or actuating point, with the machine not operating. A mark should be made with a lead pencil or other
convenient means to permanently record this “zero vibration point”. Subsequent measurements are made relative
to this point.

909GF299
Page 15
b. Normal G-Level Measurement
With the machine (equipment) operating, back off the Setpoint adjusting screw one turn CCW and reset. If it will
not reset, back off the Setpoint adjusting screw two turns CCW, etc. Again turn the Setpoint adjusting screw slowly
clockwise until actuation occurs. Mark this position with a lead pencil or other convenient means. The difference
between the two actuating points in Steps a and b is the normal g-level of the operating machine, in scale divisions.
One scale division is 0.1 g; one full revolution is 1.0 g.
Figure 4-2 Setpoint Adjustment
c. Final Setpoint Adjustment
If the “normal” g-level is less than 1.0 g above the zero level, rotate the Setpoint adjusting screw CCW 0.5 g (five
graduations) from the point where actuation occurs in Step b above. If the “normal” g-level is greater than 1.0 g
refer to Figure 4-3 for the proper Final Setpoint setting with respect to the “normal g-level vibration point” ob-
tained in Step b. See example on Figure 4-3.
NOTE
In the preceding adjustments, actuation can be heard as an audible “click”. In very
noisy surroundings, it may be necessary to use an ohmmeter or wire the Vibraswitch
to the control circuit to tell when actuation occurs or observe visually that the arma-
ture is in the up (latched) position.

909GF299
Page 16
0
5.0
4.5
4.0
3.5
3.0
0.5
1.0
1.5
2.0
2.5
5.04.54.03.53.00.5 1.0 1.5 2.0 2.5 5.5 6.0
(
b
)
(
a
)
N
O
R
M
A
L
G
-
L
E
V
E
L
M
E
A
S
U
R
E
M
E
N
T
FINAL SETPOINT SETTING
(
G
)
ZERO POINT
MINIMUM SETPOINT SETTING
(Maximum protection for machine)
OPTIMUM SETPOINT SETTING
(Good protection for machine)
MAXIMUM SETPOINT SETTING
(Minimum protection for machine)
Example: If the Normal G-Level (a) is 2.8 g above the Zero Vibration Level, the Final Setpoint Setting (b)
should be set at 3.5 g above the Zero Vibration Level. Therefore, advance the Setpoint Pointer
CCW 0.7 g (3.5 g - 2.8 g = 0.7 g) or 7 divisions (one scale division is 0.1 g) from the Normal G-
Level.
Figure 4-3 Setpoint Alarm settings.

909GF299
Page 17
SECTION V
MAINTENANCE
5.1 TROUBLESHOOTING
Vibraswitches do not normally require any maintenance or repair, however, listed below are some of the possible mal-
functions that may occur and their recommended solutions (Ref. Figure 4-1). Perform all tests with field wiring discon-
nected.
a. Functional Test - (Ref. Figure 4-1)
1. With the Vibraswitch cover removed, place Vibraswitch on a table with its mounting surface down.
2. Press reset button. If switch does not reset (armature latched on stop pin), turn set point adjustment screw CCW
until switch can be manually reset.
3. Slowly turn set point adjustment screw CW until switch trips. This is the zero trip point which is the amount of
spring tension required to overcome the 1 g force exerted by the earth's gravitational pull.
4. Note set point setting. One complete turn equals approximately 1 g. Set point scale is marked in 0.1 g incre-
ments. Turn set point adjustment screw 1 complete turn CCW. This is a 1 g setting above the earth's gravitational
pull.
5. Manually reset the switch (press reset button).
6. With the reset button to your right and the set point adjustment screw to your left, slowly rotate the Vibraswitch
toward you 90°. The switch will trip when the mounting surface is in a vertical plane and the earth's gravitational
pull is not aiding the lower magnet to hold the armature against the stop pin.
b. Vibraswitch Will Not Reset
1. Dirt and/or iron metal chips on magnets.
clean magnets.
2. Broken leaf spring - (Ref. Figure 4-1).
Return the Vibraswitch to the factory for repair.
3. Open reset coil.
Check for continuity or proper coil resistance (Ref. Table 5-1).
TABLE 5-1 Coil Resistance
Nominal Voltage Resistance (Ohms ± 10%)
24 VDC
48 VDC
120 VDC
120 VAC
240 VAC
50
230
840
Check for continuity¼
Check for continuity¼
¼(Diode prevents actual resistance reading)

909GF299
Page 18
c. Unable to Adjust Setpoint Setting to Obtain Tripping
Improper air gap between Hold-down (lower) Magnet and Armature.
Return the Vibraswitch to the factory for repair.
d. Switch Does Not Actuate
Defective or improperly adjusted switch - (Ref. Figure 4-1).
Manually move the Armature between the hold down magnet (armed position) and latching magnet (latched position)
and listen for an audible click of the switch. An audible click occurs when contacts change state. Verify by perform-
ing a continuity check. Return the Vibraswitch to the factory for repair.
NOTE
If the switch does not pass either of the tests above, return the
Vibraswitch to the factory for repair.

909GF299
Page 19
SECTION VI
SPECIAL ATEX INSTRUCTIONS
6.1 ATEX INSTRUCTIONS

909GF299
Page 20