08354B DCN7877
Teledyne API T640 PM Mass Monitor
72
4. For 640X Option only: noting its orientation, detach the filter from the quick-
connect fittings and replace with new.
Figure 5-5. External DFU, (with 640X Option only)
5. Ensure the filter(s) is (are) seated snugly with no gaps, and power on the pump
from the Setup>Vars>Pump Control menu.
CHECKING PUMP PERFORMANCE
There is one internal pump in the T640. In addition, the 640X Option has a separate
external pump. The pump(s) and the valve (640X Option only) must maintain
proper flow for measurement accuracy. Check their performance levels in the
Dashboard (If these parameters are not found in the Dashboard, configure the
Dashboard to add them; see Section 3.2.9):
•
Pump PWM typically runs between 30% and 80%.
•
Valve PWM typically runs between 50% and 85%.
If the performance levels are out of range, refer to Table 5-2 for troubleshooting
guidance.
CHECKING THE VOLUME FLOW
Check the Sample Flow levels in the Dashboard. (If not found in the Dashboard,
add it through the Dashboard configuration page; see Section 3.2.9). The typical
EPA tolerance for flow is to be within 5% of the setpoint, which is +/- 0.25 LPM
for the 5 LPM flow. If out of range (5 LPM, +/- .25 LPM), refer to Table 5-2 for
troubleshooting guidance.
For the 640X Option, also check the Bypass Flow levels in the Dashboard. (If not
found in the Dashboard, add it through the Dashboard configuration page; see
Section 3.2.9). As mentioned above, the typical EPA tolerance for flow is to be
within 5% of the setpoint, which is +/- 0.58 LPM for the 11.67 LPM flow. If out
of range (11.67 LPM, +/- 0.58 LPM), refer to Table 5-2 for troubleshooting
guidance.
