TLS-IB Site Prep Manual
PTB Compliant Installation
11
Remove the plug from the tank socket. Install a 3-inch (80 mm nominal bore) riser using an appropriate thread sealing
compound. Reducers are available for 4-inch (110 mm nominal bore) and 2-inch (50 mm nominal bore) sockets. If the
probes are not to be installed immediately, cap the riser.
PTB Compliant Installation
Applicable only where Physicalisch–Technishe Bundesanstalt (PTB) regulations are in force.
PROBE ENTRY
Certain markets require a modified probe fixing arrangement consisting of a gland mounted directly to the tank lid.
Either a dedicated tapping or a suitable flange tapped G2inch 11tpi to DIN 2999 (BS2779) must be provided. The probe
installation arrangement is illustrated in Figure 10. Veeder-Root recommend the use of a riser to provide protection to the
Mag Probe Canister.
Figure 10. PTB Compliant Installation of a Mag Probe
DETERMINING THE CORRECT PROBE LENGTH
Refer to Figure 8 on page 10 and carry out the following procedure.
1. Enter dimensions A, B, C, and E in Table 1 below.
2. Add dimensions B + C and enter this in column “F”.
3. Add a 50mm allowance for the PTB gland to the dimension in column “F” and enter the result in column “G”.
4. Select a standard probe length that is equal to or greater than the dimension in column “G”.
5. Enter the Standard Probe Length in column “H”.
Probe leader cable
Probe canister
Encapsulated connection
Field cables to console
2-inch BSP thread for
fitting a protective riser
(recommended)
Gland assembly
Flange
Tank lid
