DPLLD Equipment Checkout Steps
3. Determine DPLLD Transducer Pressure Offset
33
3. Install a pressure gauge in the line.
4. Set the relief pressure to 20 - 25 psi (verify the relief pressure by using the console - [refer to “5. Enable the
34 for the procedure to obtain pressure readings]).
5. Check the sealing surface for the cap’s o-ring and the condition of the o-ring. Clean or replace as required.
6. Replace the cap and hand tighten (the o-ring completes the seal between the body and cap).
Figure 28. Functional Element (Red Jacket Standard Pump Shown)
3. Determine DPLLD Transducer Pressure Offset
New transducers are now factory sealed and their internal chamber cannot be equalized to atmospheric pressure
by opening a vent screw as in the past. The Pressure Offset test procedure described in this step
MUST
be
performed when using new DPLLD transducers with serial numbers of 100,000 or above, in sites located at
altitudes above 2,000 feet. Note: this procedure can also be used with transducers having serial numbers below
100,000 instead of using the vent screw to equalize pressure.
Before this procedure is performed, the pressure in the line MUST be vented to zero. It is recommended that this
procedure be performed after installing the transducer, before energizing the STP. Consult the TLS-450 console’s
online help to perform the following steps:
• Run Pressure Offset Test
• Enter the Pressure Offset Value for the DPLLD Transducer
4. Purge Air from the Line
Follow accepted procedures, or appropriate pump manual, to purge all air from the product line being enabled for
dispensing.
