No visible flow is shown in the flow meter:

 

Verify that that the generator is running and that all sampling line valves are physically open to the DPC2530.  Disconnect the tubing to the filter and verify that there is flow coming out of the tubing (reference Figure 21).  If there is no flow at this point, there may be a blockage in the tubing or the supply pressure may be too low to flow through the filter and flow meter.  Isolate the sampling line by disconnecting it on both ends.  Blow clean, dry air through the sampling line to verify that it is clear.  Using a manometer, measure the supply pressure from the atmosphere generator.  If the supply pressure is less than 10” WC positive pressure, the pump may be required to pull a sample of gas through the DPC2530.

 

From this point, follow the instructions given above in Option 2 of the Drying out the DPC2530 section with respect to removing sections of the tubing to check for obstructions in the tubing preventing sample gas flow.  More detail is provided below in troubleshooting the Sampling Pump operation.

 

 

Sampling Pump Does Not Function When Energized:

Verify that the unit is powered up and the pump is turned on. Listen for the sound of the pump (normally, the pump is loud enough to hear when it is energized).  If the pump does not sound like it is energizing, please contact SSi at 513-772-0060 for more technical support.  Otherwise, if the pump is running, see below for additional troubleshooting tips.

 

Sampling Pump Does Function When Energized:

Follow the Option 2 instructions in the Troubleshooting section labeled, Drying out the DPC2530, to verify that the internal tubing is clean and free of any moisture, dirt, and debris.

 

Verify that the pump seals are still good.  Open the flow control valve on the flow meter (reference Figure 4).  To do this, turn the black knob on the bottom of the flow meter counter-clockwise (or to the left) as much as possible.  With the sampling pump running, open the enclosure (reference Figures 8 & 9) and verify that the tubing connected to the inlet and outlet of the sampling pump is actually connected and hasn’t come loose (reference Figure 23).  Verify that the tubing is also still connected to the bottom of the flow meter (also reference Figure 23).  Disconnect the tubing from the sampling pump inlet (reference Figure 22) and flow meter outlet (reference Figure 24).

 

Check the flow through the meter to see if it is at least 1.5 CFH.  If not, disconnect the tubing to the bottom of the meter and physically feel if there is any air coming out of the pump.  You can do this by putting the tubing up to your lips or tongue to feel air flow.  If you can’t feel any air flow, disconnect the other end of the tubing from the sampling pump outlet and blow compressed air through the tubing to verify that there is no blockage in the tubing.  Reconnect the tubing.  If this does not help, the seals have probably failed and the pump needs to be replaced.  Please contact Super Systems, Inc. at 513-772-0060 for more technical support.

 

If disconnecting the tubing from the flow meter inlet allows air to flow out of the tube that you can feel, the issue may be with the flow meter.  Turn off the pump and power to the DP2530.  Disconnect the tubing to the flow meter inlet and outlet (reference Figures 23 & 24).  Blow compressed air into the flow meter inlet (bottom fitting) and see if the indicator ball inside freely moves up indicating flow. If the indicator ball does not move, it may be frozen in the meter.  See the section below about cleaning the flow meter or contact Super Systems, Inc. at 513-772-0060 for more technical support.

 

Cleaning the Flow Meter:

Remove the tubing from the inlet and outlets of the flow (reference Figures 23 & 24).  Blow dry air, nitrogen, or argon through the flow meter to free the indicator ball.  If necessary, flow isopropyl alcohol through the meter and then flow air through the meter to free the ball.  Re-connect the sample supply tubing at the bottom of the meter and see if there is any flow shown through the meter.  If so, reconnect the sample tubing to the top of the meter.  If flow stops, the sample tubing out of the meter may be clogged.  Isolate that tubing and blow clean, dry air through the tubing.  Reconnect the tubing and check for flow.