Page. 5 !
OPERATING INSTRUCTIONS!
!
The Bartol “Mag-Probe" is an Instrument for
sensing magnetic fields.!
!
CAUTION: Damage may result if the "Mag-
Probe" Is dropped.!
General applications!
All voltages (AC & DC)!
Solenoids, Solenoid valves, Relays, Reed
relays, Coils, Rotary solenoids, Stepper
switches, Detecting residual magnetism,
Coils, Transient current pulses, Identifying
North & South poles, etc.!
The white magnetic shield on the “MagProbe’s" tip reduces the chance of
magnetic fields turning it on during
storage and must be removed before
using. Replace the magnetic shield after
using.!
!
DO NOT STORE THE “MAG-PROBE" NEAR A
PERMANENT MAGNET OR MAGNETIC FIELD.!
!
A “Mag-Probe" will not detect devices
enclosed in a magnetic shield. (most
devices aren’t shielded.)!
!
You may self test the “Mag-Probe" with the
High/Low sensitivity ring supplied with each
unit.!
!
TESTING AC & DC DEVICES WITHOUT!
USING THE HIGH/LOW SENSITIVITY RING!
1. Hold the “Mag-Probe" as shown in
figure 2."
!
2. Place the tip close to or on the shaft that
projects through the device’s coil."
!
3. Observe the LED in the “Mag-Probe’s"
handle."
!
4. If the LED is on,the solenoid or relay is
energized."
!
5. If the LED is off, the solenoid or relay is
de-energized."
!
6. If the LED turns on and off, and flow
through the solenoid valve under test is
not interrupted, or power through a
relay’s contacts don’t turn on and off, a
mechanical failure has occurred. "
!
7. If the LED remains off during machine
operation, two possible problems exist:!
A. No power to the solenoid or relay.!
B. An open coil"
To locate the problem, first test the
power source, then the solenoid or
relay coil."
!
8. If transit pulses are suspected, hold the
Probe tip close to or on the solenoid or
relay and observe the LED during a
machine cycle. If transit pulses are
present during the time the solenoid or
relay should be off, the LED will flash on
and off.!
"
With a little practice, you’ll know when to
use the high/low sensitivity ring in order to
test sub-miniature and smaller devices.!
!
If you need the added sensitivity, install the
high/low sensitivity ring according to the
following instructions.!
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Page. 6 !
INSTALLING THE!
HIGH/LOW SENSITIVITY RING!
"
!
Note - When testing extremely small
magnetic fields such as sub-miniature
solenoids and relays, the high sensitivity ring
must be used.!
!
!
1. Hold the high sensitivity ring between the
index finger and thumb with the white dot
on the ring toward the palm of your left
hand. (see figure 3)"
!
2. Slide the ring onto the tip toward the
body of the “Mag-Probe" until the red
LED goes out the first time. (see figure 4)"
"
!
3. Continue sliding the ring toward the
“Mag-Probe” body until the LED turns on
and then off for the second time (See
figure 5). Now the “Mag-Probe” is
adjusted for high sensitivity. To be sure
yo u h ave th e h ig h es t s e ns iti vit y
obtainable, slide the ring back until the
light immediately turns on. Then with the
tip of the index finger and thumb pressed
against the ring (figure 3), use a slight
pinching motion to move the ring toward
the body of the “Mag-Probe”. Release
immediately as soon as the LED turns
off. Remember, figure 5 is the correct
position.!
!
!
Note: Any movement of the ring after the
LED goes out will decrease the sensitivity.!
"
Caution:!
To avoid false indications when using the
high sensitivity ring, the ring must not touch
a metal surface, but you may touch a metal
surface with the mag probes tip.!
"
Remember:!
First try your “Mag-Probe" without the high
sensitivity ring. Then, if you need the high
sensitivity to detect the device under test,
slip on the ring. !
!
!
TESTING AC POWERED DEVICES WITH THE
HIGH/LOW SENSITIVITY RING INSTALLED!
!
You won't have any problems testing any AC
powered device regardless of which end or
side you test just as long as the field
strengt h is within the “Mag-Probe’s"
sensitivity range. !
!
!
!
!
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Page. 7 !
TESTING DC POWERED DEVICES WITH THE
HIGH/LOW SENSITIVITY RING INSTALLED !
!
When using the high/low sensitivity ring, the
“Mag-probe” becomes sensitive to north and
south poles. White dot toward the “MagProbe’s” tip detects North. When the ring is
removed and installed with the white dot on
the ring towards the “Mag-Probe’s” LED,
you'll detect only south poles. !
!
DC powered devices can be connected to a
power source two ways.!
(See figure 6A and 6B) !
!
In figure 6A, assume that a north pole occurs
at the coils upper end when a DC voltage is
applied as shown. If the polarity of the
applied voltage is reversed as shown in
figure 6B, A South Pole is generated at the
upper end. Try both ends of an operating
solenoid, relay, reed relay, or DC device.
Once you establish which end of the relay or
DC device causes the “Mag-Probe” to
operate, the other relays or DC devices
installed in the instrument under test should
respond at the same end. (See figure 7)!
!
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As shown in figure 8, reed relays are DC
powered, you must follow the instructions for
testing DC powered devices.!
!
If a reed relay is mounted in such a way that
you are unable to reach the normally tested
end, reverse the high/low sensitivity ring and
test the accessible end “opposite”.!
(see fig. 8) !
!
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