Please prepare the following information and/or take action:
Short description:
number of LV/HV channel/modules
locations of chambers
locations of power supplies
General:
check power cords: no PVC, correct cross section of leads
power distribution, no 'flying' multi-sockets, no chained
multi-sockets
cables according to CERN standard (halogenfree + flame-retardent)
Low voltage:
type and brand of LV power supplies, linear or switching PS,
provide copy of main tech. specs, remote controlled?
maximum current per voltage from PS specifications
nominal current per voltage
fuses: types and breaking current (melting, magnetic, fast/slow)
fuses and temperature sensing on read-out cards,
voltage drop PS -> read-out card
mechanical protection/insulation: against short circuits due to
metallic object, e.g.
washers, srews, screw drivers (particularly if flammable gas close-by).
Look at connection at PS and bus bars.
even LV PS outlets should be protected against touching (depending
on type of PS)
If LV sensed at chamber, the (usually thin) sense line should be
protected by a resistor for fire protection
grounding
lable PS with unique detector name
High voltage:
type and brand of HV power supplies
provide copy of main tech. specs
return current via lead or shielding
remote control
maximum and nominal current
fuses
grounding
above 1500 V there is a WRITTEN procedure required for
save HV switch-off for interventions on the equipment.
Prepare a few lines, send them to gkm I'll put them on
the Web (sample).
Bring a printed copie.
