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The shower counters are very delicate devices which are easily damaged.
Thus, care must be exercised whenever they are moved or used.
- Before turning on the high voltage for the shower counters (HAC5 for the preshower
and HAC6 for the total absorber), check the shower counter log book located in the Hall
A counting house for the latest values of the high voltage.
- Never disconnect or connect all the high voltage to the bases with the
high voltage power turned on. Doing so will damage the bases (the zener diodes
are destroyed).
- Never service the lead glass with the high voltage on. The
high voltage poses a safety hazard.
- Never drop anything onto the bases and tubes; they are extremely fragile.
They should not be used as support or to hold any weight. Also, do not drop
the lead glass blocks. The blocks are made of glass and will become damaged or
destroyed.
- When ramping the HV, keep an eye on the current drawn by the
individual bases. A light leak in the wrapping will produce a large current
( A at low voltages (1 kV). If the tubes draw an excess amount of current
turn them off and check for leaks in the wrapping.
Next: 5.5.5.8 Safety Assessment
Previous: Signal Summing, Amplification and
10/13/1997