Installation Directly In The Tank, Suspended From Roof Nozzle - Honeywell Enraf VITO 762 Installation Manual

 Make ground connection across the flanges;
 Lock the VITO probe by means of lock washer (3) and nut (4);
 Place the instrument label(s) (5) and secure them by means of nut (6);
 Go to section: 2.5 Installation 762 VITO Interface.
2.2.2

Installation directly in the tank, suspended from roof nozzle

When the VITO probe is installed free space, suspended from the roof, it is recommended
to use anchoring weights. These weights can be a single weight of 3 kg or a chain of
weights (total weight max. 9 kg for 361 probe and 23 kg for 76x probes).
For coated tank bottoms, special provisions are to be taken to prevent damage of the tank
coating. One suggestion is to use a single weight and keep the weight and/or probe
suspended several centimeters above the tank floor. This height should be sufficient to
accommodate vertical tank roof movement due to bulging of the tank caused by
hydrostatic pressure exerted by the liquid stored in the tank.
Install the temperature probe from a 2" or larger seize roof nozzle. The roof nozzle counter
flange must have G ½ (½" BSP) threaded hole and an earth screw for connection of the
probe.
When anchor weights are attached, maximum static load is:
(when Honeywell Enraf anchor weight – p/n 0815524 – is used, only use 3 weights);
Refer to figures 2 and 3.
 Remove optional lower IP adapter (7), nuts (3 pc.),
instrument label(s) and lock washers (2 pc.) from the
adjusting pipe (1);
 Screw the flange (2) with G ½ threaded hole on the
adjusting pipe.
Note:
Take care not to damage flying leads when
shifting the flange over the flying leads;
 Position the gasket on the tank nozzle;
 Attach anchor weights to the temperature sensor's lug
at lower end;
Caution: Static Electricity Danger
Make sure the probe is properly bonded before
inserting the probe into the tank. If needed use an
electric cable with alligator clamps to ground the
Wait at least 30 minutes after the last tank movement.
Caution
9 kg (20 lb) for 361 probe
23 kg (50 lb) for 76x probes.
probe to the tank nozzle.
Installation guide 762 VITO interfaces & VITO probes
Mechanical installation
Figure 3 Use of anchor
weights
Page 8