CEMB N500 User manual

Contents 1
N500 rev. 3.1Contents
Chapter 1 - General description
¾Standard accessories ……………………………… 1 - 1
¾Optional accessories ……………………………… 1 - 2
¾Connections ……………………………………… 1 - 2
¾Battery ……………………………………………... 1 - 3
¾General advice ……………………………………… 1 - 4
Chapter 2 - General layout
¾Keys/buttons on the control panel ………...…...……... 2 - 1
¾General purpose functions …………….…..…… 2 - 4
- Functions associated with measuring phase………. 2 - 4
- Function "Other functions …" ………….…... 2 - 5
- Functions operating on graphs ………….…... 2 - 5
- To save measurements ……………………... 2 - 9
- To capture and save displayed images ………….… 2 - 10
Chapter 3 - Home screen (menu)
Chapter 4 - Setup mode
¾Sensor setup …………………………………..…. 4 - 1
¾General setup ………………………………..……. 4 - 3
Chapter 5 - Vibrometer mode
¾Vibrometer setup ……………………………….….…. 5 - 1
¾Vibrometer – Measurement screen…………………….. 5 - 3
¾Monitoring in time .……………………….……. 5 - 4
¾Monitoring in speed ……………………….…….. 5 - 5
Chapter 6 - FFT (Fast Fourier Transform) analyzer mode
¾FFT Setup ……………………………………..………. 6 - 1
¾Spectrum analysis (FFT) ……………………..………. 6 - 4
¾Waveform function ……………………..………. 6 - 6
¾Trigger Setup …………………………..…………. 6 - 6

2 Contents
Chapter 7 - Balancer mode
¾Selection of the balancing program ………...……. 7 - 2
¾Calibration sequence ……………………..………. 7 - 6
¾Execution of measurement…………………….………. 7 - 8
¾Unbalance measurement and calculation of the correction 7 - 10
¾Splitting of correction weight ……………………… 7 - 13
¾Saving of a balancing program ……………………… 7 - 14
Chapter 8 - Data manager mode
¾Archive management ……..…………….………… 8 - 1
¾Copying /shifting archive on USB key….…….….….… 8 - 2
¾Sending archive to PC ……..…………….………… 8 - 4
¾Display of measurements present in the archive ……… 8 - 5
Chapter 9 - CEMB PoInTer (optional)
¾System requirements ………………………...…… 9 - 1
¾Installation and registration ………………..……. 9 - 2
¾Measuring points archive ……………………..….…… 9 - 3
- Data manager ……………………..….…… 9 - 3
- Data protection – Password ………...….… 9 - 5
¾List of measurements …………………………...… 9 - 5
¾Reading measurements saved on the N500 instrument ... 9 - 6
- Loading of new measurements in archive …...… 9 - 7
- Selection and elimination of measurements …..… 9 - 8
¾List of measurements to represent on a graph …....… 9 - 8
¾Display of graphs ………………………..…………..… 9 - 9
- Cursor ………………………..………….… 9 - 10
- Zoom ………………………..……….…… 9 - 10
- Shifting of graphs in window ….…..………. 9 - 11
- Separate/Combine graphs ……………..………. 9 - 11
¾Creation and printing of certificates and reports ….…... 9 - 12
Appendix A - Specification
Appendix B - Evaluation criteria
Appendix C - A rapid guide to interpreting a spectrum
Appendix D - Codes that can be used in models for certificates obtained
using the CEMB PoInTer program
Attachment: Balancing accuracy for rigid rotors

General description 1 - 1
Chapter 1
General description
The N500 instrument is supplied, together with its accessories, in a special case. It is
advisable, each time the instrument is used, to place back it in its case in order to avoid risk
of damage during transit.
Standard accessories:
-Two velocity transducers dia. 40
-Two cables for connecting the transducers
-Two magnetic bases
-Two probes
-photocell 18,000 RPM complete with stand and magnetic base
-battery charger
-roll of reflecting paper
-case
-user manual

1- 2 General description
Optional accessories:
-acceleration transducer type TA-18/S complete with connection cable and
magnetic base
-proximity sensor complete with stand, cable and magnetic base
-optical fibre photocell (60,000 RPM) complete with stand and magnetic base
-extension cable, length 10 metres, for transducers
-extension cable, length 10 metres, for photocell
-portable printer for direct printing of certificates on standard thermal or
adhesive paper
-software CEMB PoInTer for data filing, management and printing.
N.B.:
After connecting the printer to the RS232 port, wait for about 5 seconds to allow
completion of the automatic recognition and initialization procedure. Only at this
point will it be possible to make a print-out by pressing relative key
Connections
7654321
1– battery charger
2– VGA output 15-pin (only for CEMB Technical Service)
3– serial port RS232 (connecting of optional portable printer)
4 – 2 USB ports type A (master)
5 – keyboard input PS2
6 – photocell input
7 – 2 inputs, measuring channels
To connect the sensors and photocell, merely plug the connector in the corresponding
socket, pushing it until it clicks into place; make sure that the safety connection is correctly
aligned as shown in the figure.

General description 1 - 3
Instead, to extract the connector, press its end part (blue or yellow) and at the same time
pull the main body (grey), in order to release it.
Caution:
Avoid pulling the connector with force before releasing it as described above,
otherwise there would be risk of damaging it.
Battery
The N500 instrument is provided with a built-in rechargeable lithium battery, which allows
autonomy of more than eight hours under normal operating conditions of the instrument.
The battery status is indicated by an icon in the upper right hand corner of the screen.
- battery fully charged
- battery partly charged
- battery almost flat (battery life remaining when this appears is approx.
one hour)
–battery flat: recharge within 5 minutes
If the battery is flat and the instrument is not recharged within 5 minutes, a message will be
displayed
and the instrument will then switch off.
This would interrupt any active measurements not yet saved.

1- 4 General description
Caution:
It is strongly recommended to recharge the battery with the instrument switched
off: as recharging is completed within less than five hours such precaution prevents
the battery charger from being connected for an excessively long period of time
(max. 12 hours).
Caution:
The lithium battery is able to withstand the recharging-discharging cycles, even on
a daily basis, without problems but it could become damaged if allowed to be fully
discharged. For this reason it is advisable to recharge the battery at least once every
three months, even in the case of extended idle period.
N.B :
As the greater consumption is due to the back lighting of the LCD display, the
latter is switched off automatically after two minutes if no button is pressed. The
pressing of any button (except for and those of the alphanumeric keypad) is
sufficient to switch the back lighting on again.
Caution:
If the N500 instrument is provided with battery charger Accord, when plugging the
adapter in the socket on the instrument make sure of the correct polarity, by
keeping the +symbol on the same side as the wording TIP, as shown in the
following image. If not, there is risk of damaging the instrument.
General advice
Keep and use the instrument far from sources of heat and strong electromagnetic fields
(inverters and high-power electric motors).
Measurement accuracy could be impaired by the connection cable between the transducer
and instrument, therefore it is recommended to:
-not allow such cable to have sections in common with power cables;
-prefer a perpendicular arrangement when overlapping power cables;
-always use the shortest possible length of cable; in fact floating lines would act as
active or passive antennae.

General layout 2 - 1
Chapter 2
General layout
Keys/buttons on the control panel
The control panel of the CEMB N500 instrument incorporates a keypad where the various
keys or buttons can be subdivided by function:
- on / off button
Press this button to switch the instrument on;
hold it down for at least 3 seconds to switch it off , then release the button.
N.B.
After pressing , the instrument is ready for use only at the end of the switching
on procedure, signalled by the appearance of the home screen (see Chap. 3).
Note:
After the insrument has been switched off, about 30 seconds must pass before it
can be switched back on again.

2- 2 General layout
- buttons for navigating between the pages
When this button is pressed in the setup screen, it confirms the settings selected
and allows going onto the next screen.
Instead, in the Measurement screen, it has the function of starting/stopping the
actual measurement (see 2-4 Start / Stop the acquisition).
N.B.
To facilitate use of the instrument also with the left hand, the button
is located on both sides of the display.
When this button is pressed, it causes quitting of the current screen with return to
the previous one, without taking into account any changes (or saves) in the settings.
Used for returning to the Main page, from any other page.
- function keys
Each function key is linked to different functions in the various screens. Such
functions are indicated in each individual case by the buttons shown at the bottom
of the display: each function is activated by pressing the function key under it.
In the setup screens they are used for setting the various parameters, each one
being indicated by a number corresponding to that of the function key to be
pressed to modify it.
- tab key
This key can only be used when two graphs are plotted on the same page; when
pressed, it changes the active graph to which the selected functions will be applied.
The active graph can be identified by the symbol located on the right side.