SPM Instrument AB
• Box 504 • SE-645 25 Strängnäs • Sweden
Technical data are subject to change without notice.
Tel +46 152 225 00 • Fax +46 152 15075 • [email protected] • www.spminstrument.com
ISO 9001:2000 certified © SPM 2017-09. 71947 B
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The MG4 can not be
started.
The display does not light
up.
No or unnormal measured
values are displayed.
The analog outputs are not
working (0 mA).
The relays are not working.
No alarm for TLT fault.
The channels can not be
programmed.
No power supply to the
MG4 unit.
TLT (transducer line) fault,
open or short circuit.
Faulty transducer.
Incorrectly mounted
transducer.
Wrong type of transducer
is connected.
No isolation foot mounted
on the vibration transducer.
The MG4 is in stand-by
mode (Measuring = OFF)
Faulty MG4 unit.
The channel is not linked
to the analog output.
TLT fault (transducer line),
open or short circuit.
The channel is not linked
to the relay.
The signal is above the
alarm limit.
Faulty relay.
TLT = OFF
The MG4 unit is locked.
Check the power supply and the cable connec-
tions, see manual page 6.
Check the glass tube fuse - see page 6.
Check the TLT status, see page 13 (VIB transduc-
ers) and page 14, 15 (SPM transducers).
Check with a correct transducer connected di-
rectly to the MG4 input.
Check that the coaxial cable and the connectors
are correctly mounted and not damaged.
See above (TLT fault).
Check the measuring point and the transducer
installation, see pages 18 – 21.
Check the suitable transducer type, marked on
the label placed on the MG4’s upper side.
Mount isolation foot on the transducer.
Check the configuration. Select “Measuring =
ON”, see page 12.
Check the MG4 with the Test Generator STG02.
Check the settings, see pages 14 – 15.
Check TLT status (see above) and repair if
necessary. Turn off TLT test (TLT = OFF) to see if
the analog outputs are working, see page 11.
Check the settings, see manual pages 14 – 15.
Check the relay function by tapping on the
transducer.
Measure the resistance over the relay with a
multimeter.
Check the configuration. Select “TLT= ON”, see
page 11.
Disconnect the transducer cables for function
test.
Lock up with password, see page 12.
Problem
Probable cause
Action
Trouble Shooting
Machine Guard MG4-REF11A
Summary of Contents for Machine Guard MG4-REF11A
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