Service & Repair Manual
17
Copyright ©2008 XS Scuba
NOTE: Correct intermediate pressure for the first
stage is between 135-145 psi, with a supply pressure
of 2,500 - 3000 psi.
4. Open the supply valve again while monitoring the IP test
gauge to ensure that the intermediate pressure does not
rise above 145 psi. If the intermediate pressure rises
above 145 psi, immediately close the supply valve and
purge the system. Refer to the Troubleshooting Guide,
and remedy as needed before proceeding.
5. Repeatedly purge the second-stage approximately 15-20
times to cycle the regulator. Then, check the test gauge
to determine whether the intermediate pressure locks
up consistently after each cycle and remains stable at
140 (±5) psi, with no signs of creeping or fluctuation. If
the intermediate pressure is not within the specified
range, or if it fails to lock up with no creep, refer to the
Troubleshooting Guideto determine the cause of the
problem. Repeat this procedure after it is corrected.
Second Stage Adjustment and Flow Test
1. Connect the IP Test Gauge onto the inlet fitting of the
Inline Adjusting Tool , and mate the opposite fitting of the
tool onto the inlet fitting of the second stage. Pull back
the knurled knob to retract the slotted drive, and tighten
the tool clockwise onto the inlet fitting only until finger
snug. (See Fig. 21.)
2. Mate the female fitting of the LP hose onto the male fitting
of the IP Test Gauge, and tighten the swivel nut clockwise
until finger snug.
3. Install the LP hose into an intermediate pressure port of
the first stage regulator after it has been verified to be
properly serviced, with a stable intermediate pressure of
140 (±5) psi . Apply a torque wrench with 17mm crow-
foot to tighten to 38 (±2) inch-lbs.
4. Turn the venturi switch counter-clockwise until it stops.
5. Ensure that all the first stage ports are sealed, and
connect the first stage with a filtered gas supply of
2,500-3,000 psi. Slowly open the valve to pressurize the
regulator. Listen to verify that a leak can be heard from
the second stage valve, and proceed to step 6.
a. If airflow cannot be heard, it will be necessary to
initiate a slight leak between the orifice and poppet.
Press the knurled knob inward to engage the slotted
drive of the Inline Adjustment Tool with the head of
the orifice inside the inlet fitting. Then, turn the orifice
Fig. 21 – Inline Adjustment Tool w/ IP Gauge
