SPM STG-02 Bedienungsanleitung
SPM Instrument AB • Box 4 • SE-645 21 Strängnäs • Sweden
Technical data are subject to change without notice.
Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.se
© Copyright SPM 2001-10. 71689.B
Instruction Manual
Service Test Generator STG-02
for the generation of shock pulse and vibration signals
Contents
Service test generator STG-02 .................................... 1
Instrument layout ........................................................ 2
Moving through the menu structure ........................... 3
General settings and batteries .................................... 4
Shock pulse mode ....................................................... 5
Single pulse.................................................................. 6
STG pulse..................................................................... 7
Vibration mode ............................................................ 8
Transducer selection ................................................... 9
Single frequency mode.............................................. 10
Mixed frequency mode ............................................. 11
Test instructions ........................................................ 12
Technical specifications ............................................. 14
STG-02 – Service Test Generator 1
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
Service test generator STG-02
The service test generator STG-02 is used to test, service, and calibrate SPM's
instruments for shock pulse and vibration measurement:
•Machine Condition Testers (T)
•Machine Condition Analyzers (A)
•MG4 System
•CMM System, shock pulse and vibration measuring units
•CMS System, measuring unit BMS
•Measuring unit VCM-20
•Vibrameter VIB-10A/11A and VIB-20A
To test the instrument, the STG-02 simulates the following transducer signals:
•Shock pulse transducers type SPM 40000 and 42000
•SPM vibration transducers TRV-01, TRV-12, TRV-18, TRV-20, TRV-22
•Customer defined vibration transducers with voltage and charge output.
The STG-02 has the casing and the display of the A30/T30 and is operated via its
key pad. The test programs are menu selected.
For shock pulses, there are three different testing modes: single pulse, STG pulse
and TLT test. STG mode generates the same signal as the test generator STG-01
Vibration can be tested in single frequency or mixed frequency mode.
The STG-02 should be calibrated once per year at the SPM facilities in Strängnäs,
Sweden.
2 STG-02 – Service Test Generator
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
Instrument layout
1 Display 4x16 characters
2 Light sensor
3 Return key
4 Select key
5 ENTER key
6 Up/down keys
7 Left/right keys
8 OFF button
9 SPM connector
10 Communication connector
11 Vibration connector
6
7
1
2
5
4
8
9 10 11
Instrument layout
The instrument screen (1) is an LCD with back light, which can be turned off to
save battery power, or set to automatic, when it is controlled by a light sensor (2).
To start the instrument, press any of the dark keys. You can set a time for
automatic switch off or use the key (8) to turn it off.
Shock pulse signals are output from the TNC connector (9), vibration signals from
the BNC connector (11). The communication cable jack (10) receives a 6 pole
modular connector for connection to the communication module SPM 13603
which serves as interface with a PC.
3
STG-02 – Service Test Generator 3
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
Moving through the menu structure
The STG-02 functions are menu selected. Starting on the main menu, you use the
SET key to move the cursor to the line with the desired choice. If you overstep,
keep pressing SET until you are on the right line. Press ENT to open the selected
function.
Multiple choices on one line are selected by flipping through the list with the UP
or DOWN key. These keys are also used to alter the number beneath the cursor.
For multi-digit numbers, you have to move the cursor to the next position with
the RIGHT or LEFT key, then alter that position with UP/DOWN.
SET Move cursor to next line (rolling)
ENT Go to marked function
Change cursor position left - right
Alter value/choice up - down
ESC Return to previous menu
Main
menu
Shock pulse
menu
Single
pulse STG
menu TLT
test
STG
1STG
2STG
3
Vibration
menu Settings Version
Single
frequency Mixed
frequencies
Transducer
sensitivity
4 STG-02 – Service Test Generator
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
General settings and batteries
”Version”on the main menu displays the instrument name and its Eprom version
number.
Select ”Settings”on the main menu to make the general adjustments and to
check the battery voltage.
Contrast: Hold down the LEFT or RIGHT key to change the display contrast.
Off: Use the UP/DOWN keys to set the time for automatic switch off to between
min. 30 seconds and max. 30 minutes. For manual off only: press the LEFT and
RIGHT keys simultaneously. The screen will show NOT AUTO and the instrument
will remain on until shut off from the key pad. This setting is not saved, so the
instrument will be on automatic off when it is next started.
Light: With the UP/DOWN keys , the display back light can be set to ON, AUTO,
or OFF. In AUTO mode, the light is controlled by the light sensor. OFF saves
battery power.
Battery test: The STG-02 is powered by six 1.5 V LR6 alkaline cells. The battery
test the present voltage. A low battery warning is given at 5.3 V.
The battery compartment is located at the back and fastened by two screws. Pull
off the protective cover to reach the screws.
Remove the batteries before longtime storing the instrument.
Shock Pulse
Vibration
Settings
Version
Contrast: < -- >
Off: 2 min 00 s
Light: OFF
Battery Test
Battery Test
(Min 5.3 V)
8.6 V
6 x 1.5 V LR6
alkaline cells
Remove before
longtime storage
STG-02 – Service Test Generator 5
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
Shock pulse mode
To test an instrument, connect its SPM input to the SPM output of the STG-02.
Set the STG-02 to the desired test mode. It sends continuously, and you can
adjust the amplitude and frequency settings at will without having to press ENT
after a change. Then set the connected instrument to ”Measure”and wait for the
result.
On the shock pulse menu, you first select the transducer type, either 40000 or
42000. 40000 means, that the signal sent by the STG-02 is equivalent to that of a
shock pulse transducer without pre-amplifier, while 42000 simulates a transducer
line with a TMU (transducer matching unit). When testing a shock pulse meter,
the instrument should display the correct transducer line type and display it
before starting to measure. Please note: The signal is 20 dB stronger when
transducer type 40000 is selected, so it is important to correctly match the
transducer type settings on the STG-02 and the tested instrument.
TLT test also asks the tested instrument to identify the transducer line type.
When TLT is set to ON, the instrument should display a TLT quality value of or
greater than 20. The TLT test mode is also used to test the automatic change of
transducer type made by certain SPM instruments.
Single pulse sends a steady signal where you can select the pulse magnitude in
dBsv and the pulse rate in pulses per second (Hz).
STD pulse is the realistic testing mode. It sends a train of pulses with various
amplitudes, resembling a proper bearing signal. You can select one of 3 ampli-
tude settings and change the pulse rate in Hz.
Transd: 42000
Single Pulse
STG-Pulse
TLT Test
Transducer:
Select TMU, yes (42000) or no (40000)
Single pulse:
Train of pulses with 1 amplitude
STG pulse:
Train of pulses with mixed amplitudes
TLT test:
Recognize TMU, yes or no
Single pulse:
Set amplitude (dB) and
frequency of occurrence (Hz)
STG pulse:
Select amplitudes (3 dB ranges),
set frequency of occurrence (Hz)
dBsv
Hz
dBsv
Hz
6 STG-02 – Service Test Generator
SPM Instrument AB •Box 4 •SE-645 21 Strängnäs •Sweden Technical data are subject to change without notice.
Single pulse
The frequency range is 0 Hz to 1080 Hz. The standard test setting is 1000 Hz.
The amplitude range is 0 to 76 dBsv for the transducer setting 40000, and 0 to 96
dBsv for the transducer setting 42000.
At 0 Hz, there is of course no outgoing pulse, so the instrument should return its
”no signal”message.
At 1000 Hz, dBm and dBc (LR and HR) should both show the set dB value. At low
frequency levels, you might get a correct dBm (LR) result while dBc (HR) still show
the min. value: the pulse occurrence rate is too low to measure a carpet.
The recommended procedure is to keep the frequency at 1000 Hz and vary the
amplitude value in dBsv. Getting a result where dBm and dBc (LR and HR) differ
by 1 or 2 is normal in the low amplitude range.
Keep the frequency at 1000 Hz
Effect of lowering the frequency
SHOCK PULSE
Freq: 1000.0 Hz
Ampl: 30.0 dB
Single pulse mode
Vary the amplitude (dB)
dBsv
Hz
25 dB
dBsv
Hz
60 dB
dBsv
Hz
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