USER GUIDE TB-9024
Ground Pro Meter
Installation, Operation and Maintenance
Controls and Indicators
Made in the
United States of America
Hold to power the meter ON and OFF. Press once to
return the meter to the home display.
Switches the unit into impedance measurement mode
Switches the unit into high-frequency noise or
electromagnetic interference (EMI) measurement mode
Freezes the display/and shows the maximum
measurement value
Display backlight on/off
Function button, also checks Battery Voltage
Figure 1. SCS CTM051 Ground Pro Meter
Switches the unit into AC and DC voltage mode
Description
Sets up the reference for measurements and alarms
The SCS CTM051 Ground Pro Meter is a
comprehensive instrument that measures the
ground connection of your equipment in accordance
with Grounding standard ANSI/ESD S6.1 and
ANSI/ESD S20.20. In addition to measuring ground
impedance, it also measures AC and DC voltage on the
ground as well as the presence of high-frequency noise
or electromagnetic interference (EMI) on the ground,
alerting you to possible functionality problems, such as
tool lockups, erratic behavior and parametric errors.
The Ground Pro Meter and its accessories are available
as the following item numbers:
Item
Adjusts the scale for some parameters and adjusts
reference values
Features and Components
Banana
Jacks
Description
CTM051 Ground Pro Meter
NCA006 Replacement Test Leads, 1 Pair
Keypad
Display
Packaging
1
2
1
1
Ground Pro Meter
Test Leads
9V Alkaline Battery
Certificate of Calibration
Battery
Compartment
(On the back)
Figure 2. Ground Pro Meter features and components
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: (919) 718-0000 | West: (909) 627-9634 • Website: StaticControl.com
TB-9024 Page 1 of 7 March 2021
© 2021 DESCO INDUSTRIES INC
Employee Owned
Power
The Ground Pro Meter uses a 9V alkaline battery. Do
not use any other battery. If you are not using your
Ground Pro Meter for an extended period of time,
remove the battery from the unit in order to prevent
damage caused by a possible battery leakage.
Automatic Power Off
The Ground Pro Meter is programmed to Automatically
Power Off (APO) after 10 minutes of inactivity to save
battery life. This setting can be seen by pressing the
F button once. Automatic Power Off (APO) is always
enabled, and it cannot be disabled.
Installing the Battery
Remove the screw from the battery lid. Slide off the
battery lid at the back of the Ground Pro Meter and
attach the 9V battery to the battery clip. Observe the
polarity of the battery. Slide in the battery lid and secure
it back with the screw.
Low-Battery Indicator
When battery voltage gets low (less than 20% capacity
remains), the low battery indicator on the display
appears. At this point, replace the battery.
Figure 4. Automatic Power Off (APO) display
Checking the Battery Voltage
F
Press the F button two times to get the screen
in Figure 5. The upper display shows the battery
voltage, and the lower display shows the percentage of
usable battery life left.
0
2
4
6
V
Figure 3. Low-battery indicator
Turning Unit On and Off
P ow er
C
ON
Press the button. If the battery voltage is too
low even to indicate low-voltage status on the display
or if the self-diagnostic fails, you will hear a beep and
the unit will shut itself off. If the battery is completelyE M I
drained, there may not even be a beep. Please replace
the battery. Use proper disposal method per local
V
regulatory requirements.
%
0
2
Lin
4
6
Figure 5. Battery voltage and percentage.
OFF
e f.
Press the Power/C button for at least two seconds. RThe
Ground Pro Meter will turn off.
H o ld
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P ow er
C
Impedance Measurements
Press the Ohm button to go to ground
impedance mode. You should see a screen
similar to the one shown in Figure 6. The impedanceE M
mode is indicated by “OH” on the bottom display line.
I
0
V
R e f.
H o ld
2
4
6
Figure 8. Auto-zero test screens
Voltage on Ground Measurements
The presence of voltage on a ground is never
desirable. The Ground Pro Meter can measure
both AC and DC voltages on a ground.
V
AC Voltage
0
2
Integrity Meter will switch to AC voltage measurement
mode and you should see a screen similar to one in
Figure 9. You can adjust the measurement scale using
the Up and Down arrow buttons.
4
Figure 6. Impedance screen
Scaling
The Ground Pro Meter has four different scales for
measuring ground impedance. Choose the appropriate
scale for your measurements using the Up and Down
arrow buttons.
0
4
6
Figure 9. AC voltage display
Figure 7. Changing the measurement scale
Auto-Zeroing Test Leads
2
F
Test leads offer added impedance and may alter
measurement results, especially at a lower scale.
In order to take impedance of test leads into account,
short the ends of the test leads together and press the
Function button (F) until you see the screen shown in
Figure 8. In a few seconds, this screen will disappear
and you will hear a short beep. The Ground Pro Meter
will return to normal measurement mode. Now when the
test leads are shorted together, the display should show
zero Ohms, even though the test leads may have some
impedance. The correction factor will be saved in the
internal memory.
DC Voltage
Press the V button again to switch to DC voltage
measurement mode. You should see a screen similar
to the one in Figure 10. As in AC mode, you can adjust
the measurement scale using the Up and Down arrow
buttons.
Overload
If voltage on the ground is above the maximum level on
a particular scale, you should see an overload indicator
such as the one in Figure 10. In such a case, go to the
next scale using the Up arrow button.
If the test leads are not shorted properly or become
accidentally disconnected during this process, auto-zero
will fail and you should hear a long beep before the
display returns to the impedance measurement screen.
In this case you will need to repeat this process again.
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EMI Measurements
High frequency noise or ElectroMagnetic Interference
(EMI) on a ground causes equipment malfunction and
damage to sensitive components. The Ground Pro
Meter measures high-frequency noise on a ground in a
wide frequency and dynamic range.
High-frequency noise is measured in two different units
— volts and dBµV. The latter is a logarithmic measure
of voltage where 0 dBµV is referenced to 1 µV.
0
2
4
6
8
10
Figure 10. AC voltage screen.
Using Reference with Impedance
Measurements
The Reference function helps to set limits at which
an audio alarm sounds to indicate that the measured
impedance is below the specified limit. Unlike a regular
multi meter, the Ground Pro Meter allows you to specify
an exact impedance value at which the instrument will
provide an audio indication. In Impedance mode, press
the Ref. button. You should see a screen similar to the
one in Figure 11 with the REF indicator on. The top line
of the display shows the current impedance value (in
this example it is an open circuit) and the bottom line
shows the reference level. Adjust the reference level by
using the Up and down arrow buttons. Now when the
impedance is below the reference value, you should
hear a beep. The reference value is set for a particular
range – you may need to readjust it for a different
range. The reference value will be saved in the internal
memory.
In order to measure ElectroMagnetic Interference (EMI)
on a ground, press the ElectroMagnetic Interference
(EMI) button. The screen will show the average value
of the high-frequency signal in Volts on the bottom
display line and the magnitude of the envelope peak of
the signal (i.e. transients or spikes) on the top line. By
pressing the ElectroMagnetic Interference (EMI) button
one more time you can switch to dBµV units, as shown
above.
EMI
AVG
PEAK
V
0
2
V
4
AVG
0
2
4
Peak EMI in V
Average EMI in V
Relative peak value
PEAK
dB
µV
dB
µV
Peak EMI in dBuV
Average EMI in dBuV
Relative peak value
Figure 12. EMI Measurement screen
O hm s
Auto Scale
R ef
Normal
measurements
screen
0
2
4
6
8
10
REF
Impedance
in Ohms
Threshold
4
6
8
10
Figure 11. Impedance measurements screen
The Ground Pro Meter uses auto scaling in
ElectroMagnetic Interference (EMI) mode. No scale
switching is necessary.
Using Reference with EMI
Reference mode is helpful if you wish to hear an audio
alarm whenever the EMI signal exceeds a certain level.
In order to use this mode, depress the REF button
while in any of the EMI screens. You should see the
REF indicator at the top of the display. The bottom
line of the display will now show the reference value of
the peak signal. Adjust the reference level using the
Up and Down arrow buttons. Now whenever the peak
value of the EMI signal exceeds this reference level, an
audio alarm will sound.
By pressing the REF button again, you can adjust the
reference level for the average signal as shown below.
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Employee Owned
Maintenance
Clean using a dry brush or vacuum cleaner around the
device. In case of contact malfunction, clean contacts
using a contact cleaner or a brush and tighten all
connections.
Do not attempt to repair the product yourself. The
Ground Pro Meter requires little maintenance, and
there are no user-serviceable parts. If your unit requires
service beyond cleaning or replacing the battery, please
contact SCS Customer Service.
Calibration
Calibration of the Ground Pro Meter requires specialized
proprietary equipment. It must be performed by the SCS
factory. The frequency of calibration is driven by the
amount of risk exposure that can occur between tests,
however, in general we recommend annual calibration.
See SCS Calibration Terms and Conditions.
Figure 13. Reference mode with EMI
Hold Function
Specifications
Power
Battery
Pressing the Hold button once while in any
measurement mode will cause the Ground Pro Meter to
enter the Hold mode. The display will freeze, showing
the value at the moment the button was pressed.
Pressing the Hold button a second time the display will
show the maximum value of the signal accumulated
from the moment of pressing the button.
Note: If you power down the Ground Pro Meter while
in any of these modes, it will remain in the same mode
when the unit is powered up again.
Pressing the Hold button one more time puts the
Ground Pro back into regular mode.
9V Alkaline
Impedance
Range
0.000 to 1.999 Ω
00.00 to 19.99 Ω
000.0 to 199.9 Ω
0000 to 1999 Ω
Automatic auto-zero for test leads
Accuracy
±(2% + 0.01 Ω) for 0.000 to 1.999 Ω
±(2% + 3) for all other ranges
±([% of reading] + [counts])
EMI (ElectroMagnetic Interference or high-frequency
noise)
Bandwidth
9 kHZ to 450 MHz
Measurement
Range
10 mV to 5V peak
80 dBµV to 134 dBµV
Measuremnt Type Average
Peak
Voltage on Ground
AC (50 to 500 Hz) 0.001 to 250 V RMS
DC
0.001 to 350 V
General
Dimensions
(approx)
4.5ʺ x 3.6ʺ x 1.1ʺ
(114 mm x 92 mm x 28 mm)
Weight (approx)
.3 lbs (.14 kg)
Figure 14. Hold mode
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: (919) 718-0000 | West: (909) 627-9634 • Website: StaticControl.com
TB-9024 Page 5 of 7
© 2021 DESCO INDUSTRIES INC
Employee Owned
Safety Information
•
Intended Use
The Ground Pro Meter measures several important
parameters of grounding: ground impedance and
high-frequency noise or ElectroMagnetic Interference
(EMI) on a ground.
This device is not intended to be used to measure
mains voltage.
It is necessary to use proper equipment to check for
stray voltage from mains prior to using the Ground Pro
Meter to measure ground.
Ground connectivity is measured in accordance with
ANSI/ESD 6.1. It is measured as impedance in a
way that is immune to parasitic signals on a ground.
In addition to monitoring the ground connection,
the Ground Pro measures high frequency noise or
ElectroMagnetic Interference (EMI) on the ground
that is often present in a factory environment. Such
interference causes problems with the operation of
equipment.
The device must be used as specified in this user guide
in an indoor commercial/industrial environment, and
has not been evaluated for other uses or locations. If
the equipment is used in a manner not specifi ed by the
manufacturer, the protection provided by the equipment
may be impaired.
Read, understand, and follow all safety information
contained in these instructions prior to the use of this
device. Retain these instructions for future reference.
Warning: To reduce the risks associated with fire and
explosion:
• Do not use in Hazardous Locations.
To reduce the risks associated with hazardous voltage
and fire:
• Do not use this device outdoors or in wet or humid
environments.
• Do not use this device outside of the operating
conditions listed in this user manual.
To reduce the risks associated with hazardous voltage:
• Do not replace battery while device is in use.
Battery compartment is only intended to be open
with the device powered off.
• Do not operate if the battery door is not in place.
• Do not use meter to test three-phase equipment.
• Do not use to measure mains voltage Disconnect
circuit power and discharge all high-voltage
capacitors before testing resistance, continuity,
diodes, or capacitance.
• Always use proper terminals and device settings.
• Check the test leads for continuity before use. Do
not use if the readings are high or noisy.
• Do not use the meter or test leads if damaged or
are not operating properly.
• Do not modify or attempt to service the meter or
leads; there are no user serviceable parts. Return to
SCS for service.
•
•
Do not use the Meter or test leads outside of the
operating conditions listed in this user guide.
Keep fingers behind the finger guards on the leads.
All personnel using this device shall be certified or
properly trained.
Caution: To reduce the risks associated with
environmental contamination:
Dispose of meter and all components in accordance
with all applicable local and government
Notice: To reduce the risks associated with property
damage:
• Before use, check that the meter is functioning
correctly.
• Remove battery before long-term storage
Environmental Conditions
This equipment has been tested and found to be safe to
operate within these environmental conditions.
This is not a warranty of equipment performance within
these conditions:
• Indoor use only.
• Ingress Protection: IPX0.
• Altitude: Up to 2,000 m.
• Pollution degree 2.
• Temperature: Maximum 110°F / 43°C
Minimum 50°F / 10°C
• Humidity: Maximum relative humidity 80% for
temperatures up to 31°C decreasing linearly to 50%
relative humidity at 40°C
Regulatory Information
China RoHS
Electronic Industry Standard of the
People’s Republic of China, SJ
T11363-2006, Requirements for
Concentration Limits for Certain
Hazardous Substances in Electronic
Information Products
This symbol, per Marking for the Control of Pollution
Caused by Electronic Information Products, SJ/
T11364-2006, means that the product or part does
contain a substance, as detailed in the chart below, in
excess of the following maximum concentration values
in any homogeneous material: (a) 0.1% (by weight) for
lead, mercury, hexavalent chromium, polybrominated
biphenyls or polybrominated diphenyl ethers; or (b)
0.01% (by weight) for cadmium. Unless otherwise stated
by SCS in writing, this information represents SCS best
knowledge and belief based upon information provided
by third party suppliers to SCS.
SCS - 926 JR Industrial Drive, Sanford, NC 27332
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Part or Component Name
Hazardous Substances or Elements
(Pb)
(Hg)
(Cd)
(CrVI)
(PBB)
(PBDE)
Termination in capacitor 0603
X
O
O
O
O
O
Solder in diode
X
O
O
O
O
O
Finish in diode
X
O
O
O
O
O
Terminations in PCBs
X
O
O
O
O
O
Terminations in resistors 0603
X
O
O
O
O
O
Plating in resistors 0603
X
O
O
O
O
O
Resistor ink in potentiometer
X
O
O
O
O
O
Solder in instrument
X
O
O
O
O
O
Solder in IC
X
O
O
O
O
O
Solder in buzzer
X
O
O
O
O
O
Audio jack
X
O
O
O
O
O
O: Indicates that this hazardous substance contained in all of the homogeneous materials
for this part is below the limit requirement in the SJ/T11363-2006.
X: Indicates that this hazardous substance contained in at least one of the homogeneous
materials used for this part is above the limit requirement in the SJ/T11363-2006.
This numerical reference should not be construed
as a representation regarding the product’s life or
an extension of a product warranty. In the event any
product is proven not to conform with SCS’s Regulatory
Information Sheet, then SCS’s entire liability and
buyer’s exclusive remedy, will be at SCS’s option either:
(i) replacement of product with a conforming product,
or (ii) refund of the purchase price paid by buyer for
each nonconforming product, within a reasonable time
after written notification of said nonconformance and
return of said product to SCS. SCS shall not under any
circumstances be liable for direct, incidental, special, or
consequential damages (including but not limited to loss
of profits, revenue, or business) related to or arising out
of this certification, including, the use, misuse or inability
to use the product. Unless stated otherwise in writing,
the foregoing language cannot be waived, modified, or
supplemented in any manner whatsoever.
This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful
interference to radio communications. However, there is
no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a
circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
This is the EU symbol for equipment that is
covered under the Waste from Electrical and
Electronic Equipment (WEEE) directive per
CENELEC Specification 5041. It indicates that
certain products should not be discarded in the trash,
but rather should be recycled. This applies to all
electronic pluggable and battery powered products.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
FCC
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful
interference in a residential installation.
Industry Canada
This Class A digital apparatus complies with Canadian
ICES-003.
Cet appareil numérique de la classe A est conforme á la
NMB-003 du Canada.
Limited Warranty, Warranty Exclusions, Limit
of Liability and RMA Request Instructions
See the SCS Warranty StaticControl.com/Limited-Warranty.aspx
SCS - 926 JR Industrial Drive, Sanford, NC 27332
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