USER GUIDE TB-9024
Ground Pro Meter
Installation, Operation and Maintenance
Controls and Indicators
P ow er
C
Made in the
United States of America
– Turns the power on and off. Hold for a few
seconds to turn the unit off. Also resets some
parameters.
– Switches the unit into impedance measurement
mode.
E M I
– Switches the unit into high-frequency noise
(EMI) measurement mode.
– Switches the unit into AC and DC voltage
mode.
– Sets up the reference for measurements and
alarms.
– Freezes the display/and shows the maximum
measured value.
– Adjusts the scale for some parameters and
adjusts reference values.
– Display backlight on/off
V
R e f.
H o ld
Figure 1. SCS CTM051 Ground Pro Meter
Description
The SCS CTM051 Ground Pro Meter is a
comprehensive instrument that measures the ground
connection of your equipment in accordance with ANSI
6.1 and ANSI/ESDA S.20.20 standards. 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 is available in one model:
Item
CTM051
Description
Ground Pro Meter, with 9V battery and pair
probe leads
Features and Components
Banana
Jacks
Keypad
Display
The following accessory is available for the Ground Pro
Meter:
Item
NCA006
Description
Replacement Test Leads
Packaging
1
1
1
1
Ground Pro Meter
Pair of probe leads
9V 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 • (919) 718-0000 • Website:
StaticControl.com
TB-9024
Page 1 of 7 April 2016
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
Power
The SCS 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
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 on/off indicator.
In order to save battery life, the SCS Ground Pro Meter
has an automatic power-off (APO) feature that will
turn the unit off after approximately 10 minutes if no
buttons are pressed. You can access the APO setting by
depressing the F button once. You will see the display
as shown above. You can then enable or disable APO
using the Up and Down arrow buttons. Please keep
in mind that with APO disabled, the battery life will be
shorter.
Checking the Battery Voltage
F
0
2
4
6
Figure 3. Low-battery indication.
V
%
0
E M I
Turning Unit On and Off
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 completely drained, there may not
even be a beep. Please replace the
battery. Use proper disposal method per local
regulatory requirements.
OFF
P ow er
C
2
Lin
4
6
Figure 5. Battery voltage and percentage.
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.
V
Press the Power/C button for at least two seconds. The
R e f.
Ground Pro Meter will turn off.
H o ld
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9024
Page 2 of 7
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
P ow er
C
Impedance Measurements
E M I
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.
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.
V
R e f.
H o ld
Voltage on Ground Measurements
Do not use to measure mains voltage.
V
0
2
4
The presence of voltage on a ground is never desirable.
The Ground Pro Meter can measure both AC and DC
voltages on a ground.
Figure 6. Impedance Screen.
Press the Ohm button to go to ground impedance mode.
You should see a screen similar to the one shown in
Figure 6. The impedance mode is indicated by “OH” on
the bottom display line.
AC Voltage
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.
Scaling
Figure 7. Changing the measurement scale
The SCS 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
2
4
6
Figure 9. AC voltage display
Auto-Zeroing Test Leads
F
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.
0
2
4
6
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.
Figure 8. Test leads screen.
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 SCS Ground Pro
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9024
Page 3 of 7
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
EMI Measurements
EMI
AVG
PEAK
V
Peak EMI in V
Average EMI in V
Relative peak value
0
2
4
V
0
2
4
6
8
10
AVG
Figure 10. AC voltage screen.
dB
µ
V
dB
µ
V
PEAK
Peak EMI in dBuV
Average EMI in dBuV
Relative peak value
Using Reference with Impedance
Measurements
O hm s
0
2
4
Figure 12. EMI Measurement screen.
High frequency noise (EMI) on a ground causes
equipment malfunction and damage to sensitive
components. The SCS 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.
In order to measure EMI on a ground, press the 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
EMI button one more time you can switch to dBµV units,
as shown above.
R ef
Normal
measurements
screen
0
2
4
6
8
10
REF
Impedance
in Ohms
Threshold
4
6
8
10
Auto Scale
The Ground Pro Meter uses auto scaling in EMI mode.
No scale switching is necessary.
Figure 11. Impedance measurements screen.
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 SCS 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.
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9024
Page 4 of 7
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
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.
Pressing the Hold button once while in any measurement
mode will cause the SCS 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.
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.
Repairs and Servicing
Do not attempt to repair the product yourself. Contact a
SCS sales representative or authorized dealer to request
inspection and repair. There are no user-serviceable
parts.
Device Calibration
Specifications
Power
Battery
Contact a SCS sales representative or authorized dealer
to request for product calibration if needed.
9V Alkaline
0.000 to 1.999 Ohm, 2% + 0.003 Ohm
00.00 to 19.99 Ohm, 1% + 0.05 Ohm
000.0 to 199.9 Ohm, 1% + 0.5 Ohm
0000 to 1999 Ohm, 1% + 5 Ohm
Automatic auto-zero for test leads
9kHZ to 450MHz
10mV to 5Vpeak
80dBµV to 134dBµV
Average
Peak
0.001 to 10V RMS
0.001 to 10V
4.5ʺ x 2.4ʺ x 1.1ʺ
(114 mm x 60 mm x 28 mm)
.3 lbs (.14 kg)
Figure 13. Reference mode with EMI.
By pressing the REF button again, you can adjust the
reference level for the average signal as shown above.
Impedance
Range
Hold Function
EMI (noise on ground)
Bandwidth
Measurement
Range
Measuremnt Type
Voltage on Ground
AC (50 to 500 Hz)
DC
General
Dimensions
(approx)
Weight (approx)
Figure 14. Hold mode.
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9024
Page 5 of 7
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
