Wood’s Powr-Grip PCFT2SA47 - Manual (Page 16)

Rev 0.0/11-13 14 P2-DC2: #35114
Make sure alarm is clearly audible over ambient noise at operator position.
A low vacuum/power loss warning buzzer on each pad channel
sounds an audible alarm in the case of these potentially dangerous
situations. Rotate the shutter on each buzzer to adjust the volume
as shown. Make sure the alarm can be heard over ambient noise in
the work area. The alarm must be clearly audible at the maximum
distance between the operator and the lifter, despite any intervening
barriers or obstructions.
In order to be considered clearly audible,
the alarm volume must
exceed ambient noise by at least 15 dBA at the operator
position. 7 Since the Maximum Alarm Volume is 103 dBA at 2 ft [60
cm], ambient noise must not exceed 88 dBA under any
circumstances.
8
7
Consult CE Standard EN 457 for alternative ways to determine whether the alarm is clearly audible to operators.
8
Furthermore, if ambient noise measures 88 dBA, the alarm volume must be set to maximum and the operator must remain
within 2 ft [60 cm] of the warning buzzer, in order for it to be effective.