SafeGuard MegaGuard easy User manual

SG9265055
Reference manual

EC CONFORMITY
Unit SG9265055 conforms to EC directives EMC - 2014/30/EU , the
following harmonized standards are in use: EN 61000-6-1, EN 61000-6-3.
SAFETY INSTRUCTIONS
ATTENTION : this instrument generates a 100V measuring voltage on the
two measuring terminals or on the external probes if connected in the
“EXTERNAL PROBE” sockets.
Thecurrentislimitedto10mAandcannotmakeanyinjurytotheoperator.
For operator’s security, avoid to touch the electrodes directly.
WARRANTY
This unit is guaranteed against all defects due to faulty materials and
workmanship, within 12 months from the date of purchase.
A use not conforming to what specified might be dangerous to the safety of
the operator and may damage the instrument.
In such circumstances the manufacturer is relieved of any liability and the
warranty itself will decay.
REPAIR
Repairs have not been attempted by anyone other than authorized repair
distributors.
Do not try to repair the unit by yourself.
ATTENTION: Dangerous voltage is present inside the instrument.

TECHNICAL FEATURES
The MegaGuard Easy can measure surface resistance and resistance
to the ground of mats, floors and other objects of the EPA area,
and can also be used for point-to-point measurements.
> 10
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 T Ω − οο
< 10
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 G Ω - 1 T Ω
< 10
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 G Ω - 100 G Ω
< 10
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 G Ω - 10 G Ω
< 10
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 M Ω - 1 G Ω
< 10
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 M Ω - 100 M Ω
< 10
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 M Ω - 10 M Ω
< 10
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 K Ω - 1 M Ω
< 10
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 K Ω - 100 K Ω
< 10
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-10K Ω
Resolution: 1 decade
Accuracy: ± 1 decade
Measuring voltage: . . . . . . . . 10Vdc for R<100kΩ−100Vdc for R>100kΩ
Dimensions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80x120x27mm
Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200g
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 V
PROBES AND ACCESSORIES
SG9265065 . . . . . . . . . . . . . . . . . . Shielded probe made to IEC 61340-5-1
. . . . . . . . . . . . . . . . . . . . . . . . 63/30mm diameter, 2.5Kg weight (optional)
SG9265070 . . . . . . . . . . . Concentric ring PROBE made to IEC 61340-5-1
. . . . . . . . . . . . . . . . . . . . . . . . 63/30mm diameter, 2.5Kg weight (optional)
SG9265013B. . . . . . . . . . . . . Connection cable jack 3.5mm - banana 4mm

CONTENT OF THE PACKAGE
The code SG9265055 includes:
- 1 MegaGuard Easy with battery
- 1 connection cable SG9265013B, 3.5mm jack - banana4mm
- Manual
- ISO9000 traceable calibration certificate.
- Box

PANEL
LEFT SOCKET
Input for external probe RIGHT SOCKET
Input for external probe
100V MEASURING VOLTAGE
LOW BATTERY LED
MEASUREMENT BUTTON
BATTERY COVER
BATTERY REPLACEMENT
•Open the battery cover, unscrewing the 2 fixing screws.
•Replace the battery.
•Close the battery cover.

MEASURING ELECTRODES
Left Socket
Right Socket Left Measuring Rubber
Right Measuring Rubber
"Right Socket" and "Right Measuring Rubber".
In one of these two points the HV measurement output is present.
The HV measurement output is connected to the "Right Measuring Rubber".
When the 3.5mm jack is inserted into the "Right Socket", the "Right
Measuring rubber" is automatically disconnected and the HV measurement
output connected to the 3.5mm jack
"Left Socket" and "Left Measuring Rubber".
In one of these two points the SIGNAL measurement input is present.
The SIGNAL measurement input is connected to the "Left Measuring
Rubber".
When the 3.5mm jack is inserted into the "Left Socket", the "Left Measuring
Rubber" is automatically disconnected and the SIGNAL measurement input
connected to the 3.5mm jack.
EXTERNAL PROBE CONNECTION
SG9265065 SG9265070
to the LEFT socket
to the RIGHT socket
GREY socket
= SHIELD
connect to GND
for Meas. >100GΩ
(recommended)
to the
RIGHT socket
or to the
LEFT socket
GREY socket
= SHIELD
connect to GND
for Meas. >100GΩ
(recommended)

OPERATIVE INSTRUCTIONS
SURFACE RESISTANCE MEASUREMENT
•Be sure that the surface under test is clean and free of grease or other
chemicals than can create an isolant layer.
•In case of doubt clean the surface with a specifical detergent, without
alcohol or silicon, so that the non conductive layer will be removed.
•Place meter on test surface.
•Press the red pushbutton, and apply downward force of approximately
2Kg, holdtheredpushbuttonpressedforat least 5secondstoamaximum
of 10 seconds in order to get an accurate measure.
•When “100V”LEDlights on, itmeansthatthe appliedtest voltageis100V.
When the LED is off, the applied test voltage is 10V.
•The displayed measure start always from the lower resistance valueand
gradually reaches the real resistance value. In order to get accurate
measurementswait 5seconds moreafterthevalueseemstobestable.
RESISTANCE TO GROUND MEASUREMENT
•Be sure that the surface under test is clean and free of grease or other
chemicals than can create an isolant layer.
•In case of doubt clean the surface with a specifical detergent, without
alcohol or silicon, so that the non conductive layer will be removed.
•Insert the 3.5mm jack of the connecting cable into the Left Socket
(SIGNAL measurement input) and connect the banana 4mm to a safe
ground point.
•Place meter on test surface.
•Press the red pushbutton, and apply downward force of approximately
2Kg, holdtheredpushbuttonpressedforat least 5secondstoamaximum
of 10 seconds in order to get an accurate measure.
•When “100V”LEDlights on, itmeansthatthe appliedtest voltageis100V.
When the LED is off, the applied test voltage is 10V.
•The displayed measure-start always from the lower resistance valueand
gradually reaches the real resistance value. In order to get accurate
measurementswait 5seconds moreafterthevalueseemstobestable.

POINT TO POINT RESISTANCE MEASUREMENT
•Be sure that the surface under test is clean and free of grease or other
chemicals than can create an isolant layer.
•Insert the 3.5mm jack of the connecting cable into the Right Socket (HV
measurementoutput)andconnectthebanana4mmtoaneternalprobe.
•Insert the 3.5mm jack of the connecting cable into the Left Socket
(SIGNAL measurement input) and connect the banana 4mm to an
external probe.
•Place meter on test surface.
•Press the red pushbutton, and apply downward force of approximately
2Kg, holdtheredpushbuttonpressedforat least 5secondstoamaximum
of 10 seconds in order to get an accurate measure.
•When “100V”LEDlights on, itmeansthatthe appliedtest voltageis100V.
When the LED is off the applied test voltage is 10V.
•The displayed measure-start always from the lower resistance valueand
gradually reaches the real resistance value. In order to get accurate
measurementswait 5seconds moreafterthevalueseemstobestable.
MEASURING PRECAUTIONS
ATTENTION: DURING GROUND RESISTANCE MEASURING, if the earth
reference point is faulty or unconnected, indefinite resistivity values may
appear.
IMPORTANT: If there are devices connected to the mains power supply on
the surfaceundertest,and evenpower cordsor otherconductors under a.c.
voltage, problems on the readings may occur, because 50Hz may cause an
interference with the MegaGuard Easy measuring circuit especially when
measuring high resistance values.
In case of doubt disconnect the mains power supply by opening the main
switch.