Vega WEIGHTRAC 31 Operating Instructions Manual page 15

Measuring frame (op-
tional)
WEIGHTRAC 31 • 4 ... 20 mA/HART - four-wire
8. Align the clamp collars (4) and tighten the nuts (7) evenly with
8 Nm (5.9 lb ft).
9. Check if the sensor (5) is fastened correctly.
- Conveyor belts
Mount the measuring frame in such a way that the measurement tube
of WEIGHTRAC 31 is below the conveyor belt (tight span).
Keep a distance of at least 10 mm (0.4 in) between the conveyor belt
and the measurement tube of WEIGHTRAC 31.
- Screw conveyors
Mount the measuring frame at a position on the spiral conveyor where
the product is transported steadily. Avoid places where the product
accumulates or falls back over the worm shaft.
- Chain conveyors
When mounting the WEIGHTRAC 31 on a chain conveyor, the instal-
lation angle is very important for optimal irradiation.
Follow the instructions in the "Source Sizing" document.
Mounting of the measuring frame (optional)
The measuring frame with mounting accessories can be selected as
an option. If you have ordered WEIGHTRAC 31 with measuring frame,
then proceed as follows.
Mounting - Crossbeam
Before fastening the support stands, we recommend premounting the
measuring frame. By doing this you can easily lay out the holes for
fastening the unit to the conveyor belt.
To mount the measuring frame you need a torque wrench (45 Nm or
8 Nm) and two socket wrenches of size 16 and 10.
1. Place the crossbeam (4) on the upper holding fixtures of the two
support stands (6).
Make sure that the crossbeam (4) has an excess length of ap-
prox. 30 mm on both sides.
4 Mounting
15