Thermo Scientific SAM12, Manual

Page: 132 / 176

Routine Checks Issue: 1.0
8-2 SAM12 User Manual Thermo Fisher Scientific
Electrical Checks
During calibration, check the general condition of the battery.
To do this, turn the SAM12 key-switch on the rear panel to the
ON position and remove the mains power cord. Remove the
top cover and connect a suitable Voltmeter, set to the DC volts
range, directly across the battery terminals. Check the “load”
battery voltage is greater than 12 volts (assuming the battery
has previously been charged). If the battery voltage is low,
consult
Troubleshooting (page 10-4) . Replace the top cover.
Alternatively the battery voltage and load can be monitored
(see
Battery (page 5-14) for further information).
NOTE: Only qualified personnel should operate the SAM12
with the mains connected and the cover removed. Make sure
all the warnings given at the front of this manual are heeded.
During calibration, ensure all lamps are operational (see Vault
(page 5-18) for further information).
It may be necessary at some time (due to replacement of Touch
Screen or Touch Controller) to re-calibrate the touch screen.
This is an Administration function and the facility would be
accessed outside of the application program.
Periodically, and after Servicing, check all Earth connections
are fitted and tight to ensure continued EMC performance and
User Safety. These checks should include the screws securing
the mains inlet/filter assembly to the rear panel, all connections
to the central earth point (CEP), and the connection to the Main
Frame.
Also check that all screening covers are fitted and all fixings
tightly secured.
Periodic Source Checks
During calibration, after repairs, or once a year, the detection
efficiency of the SAM12 should be checked using a Calibration
check as described in
Cal Check (page 5-19) . To perform these
checks, small area sources of the nuclides that the SAM12 is
required to detect should be used. A stable background is
essential for an accurate result. The calibration check will be
performed to an accuracy defined by Calibration Check
Accuracy (%) (see
Params 1 (page 5-8) ). The overall
Efficiency calibration factor should be within
±
10% of the
existing programmed value.
Battery Charge state
Display Checks
EMC & Safety Earthing
Checks