Varec 2920 Installation And Operation Manual page 24

2920 Float & Tape Transmitter
14
Warning! Whenever the back cover of the gaugehead is removed, stand to one side as the
last bolt is removed. If the negator motor spring is broken, the broken pieces may cause
injury when the cover is removed.
Warning! The mechanical connections between the gauge float guide cables, the float, the
tape, and the gaugehead provide an adequate ground connection for the safe drain of
electrostatic charges that may accumulate in the tank and the product. Worker activity and
worker clothing may accumulate electrostatic charges on the body of a worker. Care should
be used in flammable environments to avoid the hazard.
Make certain grounding straps are fastened properly to the case of each unit. Ground
connections via mounting clamps and bolts are not sufficient to a ensure proper ground.
Drive pin on sprocket
Transmitter
Slotted drive coupling
1. Remove the back cover of the gaugehead (see the 2500 Automatic Tank Gauge Installation
and Operations Manual).
2. Remove the access cap from the back cover of the gaugehead (see the 2500 Automatic
Tank Gauge Installation and Operations Manual). Remove and discard the four fiber wash-
ers.
3. The preferred mounting of the transmitter is to secure the transmitter onto the back cover
of the gaugehead, using the four hex head cap screws that are attached to the access cap.
Make sure that the top of the 2920 FTT housing (marked with "TOP") lines up with the top
of the back cover. Position the circular gasket with the four bolt holes between the trans-
mitter and back cover.
4. Position the back cover and transmitter so that the drive pin on the gaugehead sprocket
passes through the slotted drive coupling on the transmitter drive shaft.
5. Ensure the top side weep hole is plugged with the included screw as shown in the follow-
ing figure to prevent ingress of water into the transmitter.
Gaugehead
Sprocket, wheel,
and tape
3 Mounting
Installation and Operations Manual