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The QNix® 7500 coating thickness measuring gauge is part
of the product line of non-destructive measurement gauges.
Designed for the future, this modular system gauge is characterized by a wide application range and a robust build,
already well known from our other gauges. It is possible for
example to use the QNix® 7500 with an integrated probe as
a one-hand operated gauge, or by using a connecting cable, as a gauge with an external probe. Using the respective
probe, the gauge will measure coatings on steel and iron or
coatings on a non-magnetic, metallic substrate such as
aluminium.
Please read these instructions carefully before operating
the gauge for the first time. It will help you to make use of all
advantages and conveniences the QNix® 7500 has to offer.
Would you like to know more about the other coating thickness gauges of our product line? Or do you have any questions concerning coating thickness measuring? Please do
not hesitate to contact us. Our specialists with their longstanding experience will be glad to assist you.
The QNix® 7500 coating thickness measuring gauge is a
combination gauge with a wide range of applications. Optionally, it is available with memory and statistical functions
(QNix® 7500 M).
The basic gauge can be combined with an integrated Fe-,
NFe- or dual-probe. If the gauge shall be used with an external probe, just pull the probe out of the gauge and connect the probe with the optionally available adapter cable.
The Fe-probe measures all non-magnetic coatings such as
lacquer, powder coatings, plastic, enamel, chromium, copper, zinc, etc. on steel or iron.
The NFe-probe measures all insulating coatings such as
lacquer, plastic, enamel, etc. on non-magnetic substrates
such as aluminium, copper, brass or stainless steel.
With the integrated interface readings can be transferred
online to a computer (serial-port or USB-port).
The QNix® 7500 M coating thickness measuring gauge can
be supplied with memory to store readings and even subdivide them into blocks. Up to 3900 readings can be stored.
As a further option, an evaluation software for statistical
evaluation and documentation can be supplied.
The QNix® 7500 complies to national and international
(DIN, ISO, BS, ASTM) standards and regulations:
DIN 50981, 50984
ISO 2178, 2360, 2808
BS 5411 (3 & 11), 3900-C5
ASTM B499, D 7091
The QNix® 7500 incorporates the latest electronic technology in order to fulfill different measuring tasks. This high
precision instrument covers a wide range of applications,
yet it is robust and easy-to-use in every-day practice. If operated and treated with care, it will serve you many years
producing accurate and reliable readings.
Do not let it drop and protect it from dirt, dust and other
substances. Protect the gauge from moisture, chemically
aggressive substances and/or gases.
After use, the gauge should be stored in its protective carrying case.
Substantial changes in temperature can influence the readings, as is the case with all precision gauges. Do not expose the gauge to strong, direct sunlight or to other sources
of energy causing temperature shocks.
The housing is resistant against most solvents. However a
resistance against all chemical substances cannot be guaranteed. Use only a damp, soft cloth to clean the housing.
Accurate readings can only be obtained, if the measuring
probe is clean. Check the probe regularly and remove residues such as lacquer etc. from the ruby tip.
If the gauge will not be used for a longer period, remove the
battery in order to prevent leakage and therefore destruction of the gauge.
In case of malfunction, please do not try to repair the gauge
yourself. Our repair service will be glad to assist at any
time.
The standard probes have a measuring range of
0-2000 µm or 0-80 mil (1 mil = 25.4 µm)
Optionally probes with a measuring range of up to 5000 µm
(200 mil) and right-angle-probes are also available.
The QNix® 7500 is operating either in µm or in mil only.
The unit is preset before shipping depending on the destination country. Gauges with memory QNix® 7500 M can be
switched from µm to mil using the optionally available software.
The resolution depends on the thickness of the coating and
is as follows:
0.1 µm in the range of 0.0 - 99.9 µm
1 µm in the range of 100 - 999 µm
0.01 mm in the range of 1.00 - 2.00 (5.00) mm
or
0.01 mil in the range of 0.00 - 9.99 mil
0.1 mil in the range of 10.0 - 80 (100) mil
(1 mil in the range of 100 - 200 mil)
Storage: -10°C - 60°C (14°F - 140 °F)
Operating: 0°C - 50°C (32°F - 122 °F)
The QNix® 7500 is powered by a 9V alkaline battery. The
battery is located at the bottom end of the gauge. If the
blinking sign "BAT" appears in the display, it is advisable to
change the battery. However it is still possible to measure
for some time. Stored data will not be deleted when the battery is empty or while changing the battery.
A new zero-adjustment is required when using the gauge
for the first time, working with different materials, and after
inserting a new battery.
Place the probe of the QNix® 7500 on one of the zero
plates enclosed in the case. For measurements on ferrous
substrates use the steel zero plate, for non-ferrous applications use the aluminium plate or a respective uncoated
substrate.
Make sure the probe is placed rectangularly and evenly on
the surface of the zero plate or on your uncoated substrate.
If the value indicated is not within the basic tolerance, the
gauge should be adjusted (gauges with memory QNix®
7500 M must not be in the Memory Mode). Press the lower
red button C of the gauge while the probe is placed on the
zero plate, i.e. the substrate. You will hear a "beep" and a
control number will appear on the display. Lift the gauge or
the probe at least 10 cm (4 inches) from the zero plate. The
gauge will "beep" again and another number will be displayed. Now the QNix® 7500 is adjusted.
When repeating measurements on the same spot, the readings may not always be 0.00 µm/mil, as the surface roughness, dirt, scratches etc. might cause differences.
Place the probe evenly on the object to be measured. Place
the thumb directly above the probe. This ensures best handling. The reading is immediately indicated on the display,
accompanied by a "beep". Simultaneously you will also receive the information, which probe, Fe or NFe, is presently
used in the gauge.
The most obvious advantage of the modular system QNix®
7500 is the universal application. Fe-, NFe-, and DualProbes can be plugged firmly into the housing (internal
probe) or attached to it by an QNix® 7500 adapter cable
(external probe). In order to measure with a separate, external probe, the internal probe can be pulled out of the
housing. An optionally available QNix® 7500 adapter cable
with plug is inserted into the opening. Connect the probe to
the plug of the cable. This versatile coating thickness gauge
allows measurements even on hard-to-reach spots or on
difficult geometries. A special probe recognition system will
automatically tell you, which probe you are presently using.
If the QNix® 7500 or its probe is placed incorrectly, the display shows "Err" (error). The same message appears when
the probe is lifted before the measurement has been completed or when the probe is zeroed on a non-metallic substrate.
If the measurements are out of range, the display shows
"InFi" (infinite). The same will be displayed, if measurements on non-metallic substrates are taken.
The gauge automatically turns on, when the probe is placed
on the surface, and shuts off after approx. 10 sec, if it is not
used. The last reading is stored and appears again on the
display, when the upper right button M is pressed shortly.
When measuring on rod materials align the "V"-groove in
the ring of the probe with the rod.
Do not take measurements on magnetized parts!
Magnetic fields are likely to influence the readings of the
Fe-probe, strong electro-magnetic fields may influence all
measurements.
When using the Dual Probe, switching from Fe- to NFemeasurements or vice versa is done as follows:
Switch on the QNix® 7500. The actual measuring method
Fe or NFe is displayed on the left side (e.g. Fe). Then press
the lower left button C for at least 3 seconds. A "beep" will
sound and the new measuring method is shown on the left
side of the display (e.g. NFe). To switch back to the other
method just press C again for 3 seconds.
In order to transfer data, the gauge has to be connected
through the optionally available interface cable with the
serial-port or the USB-port of a computer. To show the data
online, our QNix® software can be used or standard editing
programs.
Gauges with memory QNix® 7500 M are offering the following features:
a) Storing up to 3900 readings
b) Block segmentation
c) Display of the mean value for each block
d) Display of the maximum value of each block
e) Display of the minimum of each block
f) Deleting the last reading or entire memory
g) Processing of the readings using the software
When the QNix® 7500 M is switched on, the gauge is in the
Normal Mode where no readings are stored.
To activate the Memory Mode, press the upper right button
M for approx. 1 second. Measurements in the Memory
Mode are accompanied by a double "beep". Approx. 2
seconds after the last reading has been taken the display
starts alternating to show the reading and the number "N" of
the reading, e.g. the display shows 125 µm (last reading)
and N 0014 (number of reading).
If no readings are stored in the memory the display alternating shows b001 and the sign "bloc", indicating that the readings will automatically be stored in block 1.
To leave the Memory Mode, press the upper right button M
again. Notice: If pressed longer than 3 seconds, a new
block will be created.
The built-in memory can store up to 3900 readings. If the
gauge is out of memory, the display shows "End" for approx. 6 seconds. Then the last reading alternating with the
number of this reading is shown.
If no measurements are taken within 30 seconds, the gauge
switches off. The gauge automatically returns to the Normal
Mode if started again.
In the Memory Mode the readings can be stored in different
blocks, in order to distinguish the different tasks. Up to 999
blocks are available. In order to create a new block, press
the upper right button M while the gauge is in the Memory
Mode. Wait until the gauge beeps and the word "bloc" is
shown, alternating with the number of the new block (e.g.
"b002" for block no. 2). Other blocks can be created using
the same procedure. The size of the blocks may vary as
they are determined by the user only. If all 999 blocks have
been used, the display shows "End" for approx. 6 seconds
and a beeping alarm sounds.
Introduction
System Description
Maintenance
Measuring Range
and Resolution
Temperature Range
Operation and
Battery Exchange
Zero-Adjustment
Handling
Measurements
with the Dual Probe
Storing
Measured Values
Block Segmentation
in the Memory Mode
Memory Mode (optional)
Data Output with Interface
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Additionally, the gauge can display the mean, maximum,
and minimum value of the readings stored in the presently
used block. The gauge has to be switched on and be working in the Memory Mode. Press the lower left button C
shortly, while the gauge is lifted off the surface. The display
will show the sign "Ae" (average) and the average value in
µm, mm or mil alternating with "N" showing the number of
readings stored in this block. E.g. Ae 265 µm alternating
with N 0044 means, that in the active block the average
value is 265 µm and has been calculated out of 44 readings
stored in this block.
In order to display the maximum reading of the active block,
press the lower left button C again. The display will show
the sign and the maximum reading. When pressing this
button again the minimum reading of the active block is
displayed.
If no readings have been stored in the active block, it is not
possible to calculate statistical values. Then the display will
read "Ae no" alternating with "N 000".
The display of the mean-, minimum-, and maximum values
is not segregated into Fe and NFe measurements.
The QNix® 7500 allows to delete the last reading in the
memory as well as the entire memory. The procedure is as
follows:
Set the gauge to the Memory Mode. Then press the lower
left button C for at least 3 seconds while the gauge is lifted
off the surface. This function allows the user to eliminate erratic readings that would falsify the statistics.
If all readings in a block are already deleted, the next deleting process will eliminate the block as such, and the last
reading in the previous block will be displayed.
The entire memory content can be deleted by keeping the
button pressed for another 3 seconds after the last reading
has been deleted. The display shows "dEL" and "ALL" (alternating) and a "beep" sounds. If the button is not released
within these 3 seconds, the entire memory content will be
deleted.
Deleting of the entire memory content can also be performed with our optionally available software.
The built-in interface enables the gauge to process the
measured data statistically. The socket of the interface is
located at the bottom of the housing and is covered by the
lid of the battery compartment to prevent spoiling of the
socket. A software for statistical evaluation on your computer is also available.
For further information concerning "Data Processing"
please refer to the software Instruction Manual.
All measurements of the QNix® 7500 or QNix® 7500 M
can be displayed online on the computer monitor.
The procedure is as follows:
Connect the probe with the gauge using the adapter cable.
The gauge itself has to be connected to the computer via
the interface cable. Each reading or other process, such as
calculation of mean, maximum, and minimum value, is directly displayed on the computer monitor. If the gauge
QNix® 7500 M is set to the Memory Mode, all readings will
additionally be stored so that the data can be processed
later.
If the last reading in the gauge is deleted, the monitor will
show the information "DELETED".
1. Fe = Measurements on steel or iron
substrate
2. NFe = Measurements on non-ferrous
metallic substrates
3. Err = Incorrect handling
4. IFI = Measurement beyond the measuring
range, or incorrect substrate
5. BAT = Battery is getting weak,
please exchange
6. bloc = Displayed alternating with the
block number
7. End = Out of memory
exhausted
8. Prob = The gauge is switched on,
but no probe connected
9. Ae = Average value of all measurements
stored in the active block
10. a) N = number of readings
b) (Ae)N = Number of measurements of the
evaluated block
11. no = No readings stored in the active block,
calculation of statistical values
is not possible
12. = Maximum value measured
in the active block
13. = Minimum value measured
in the active block
The electronic coating thickness gauge QNix® 7500 or
QNix® 7500 M is delivered with a carrying case containing
(as option) an integrated Fe or NFe probe, together with the
respective zero plate, a 9V alkaline battery and the Instruction Manual.
Probe Fe Probe NFe Dual-Probe Right-Angle-Probe
Fe, rigid Right-Angle-Probe NFe, rigid QNix® 7500
adapter cable Interface cable RS 232 or USB-cable for
connection to a PC QNix®-Software for PC.
Substrate
iron or steel Fe-Probe
Non-magnetic metals, e.g.
aluminium, zinc, copper, brass,
stainless steel NFe-Probe
Memory (optional) up to 3900 values
Blocks up to 999
Interface RS 232 and TTL
Measuring Range 0.0 - 2000 µm or 0.00 - 80 mil
resp. 0.0 - 5000 µm or 0.00 - 200 mil
(memory gauges convertible by software)
Display of Readings from 0.0 - 999 in µm
from 1.00 - 2.00 (5.00) in mm
resp. from 0.00 - 80 (200) in mil
Resolution 0.1 µm 0.0 - 99.9 µm
1 µm 100 - 999 µm
0.01 mm 1.00 - 2.00 (5.00) mm
resp. 0.01 mil 0.00 - 9.99 mil
0.1 mil 10.0 - 80 (100) mil
1 mil 100 - 200 mil
Accuracy +/- (1 µm + 2%) 0 - 2000 µm
resp. 0 - 80 mil
+/- 3.5% 2000 - 5000 µm
resp. 80 - 200 mil
Minimum Object Size Fe 10x10 mm² (0.4"x0.4")
NFe 6x6 mm² (0.24"x0.24")
Minimum Curvature
convex 5 mm or 0.02"
concave 30 mm or 1.2"
Minimum
Substrate Thickness Fe 0.20 mm or 8 mil
NFe 0.05 mm or 2 mil
Temperature Range
Storage -10°C to 60°C (14°F to 140°F)
Operation 0°C to 50°C (32°F to 122°F)
Probes One-Point
Power Supply 9 Volt Alkali Battery
Dimensions 120 x 60 x 26 mm
(4.8" x 2.4" x 1.04")
Weight 120 g (4.2 oz) incl. battery
Technical Date subject to change without notice
Instruction Manual
Coating Thickness Gauge
7500
7500 M
with Memory
Automation Dr. Nix GmbH & Co. KG
Robert-Perthel-Str. 2
50739 Köln, Germany
Tel. +49 (0) 221 91 74 55-0
Fax +49 (0) 221 17 12 21
info@automation.de
www.automation.de
02/11
Display of Mean, Maximum
and Minimum Values
Deleting Stored Readings
or Blocks
Processing of Stored
Values in the Computer
Online-Measurements
Display Messages
Scope of Supply
Accessories (optional)
Technical Data
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