Checking Pump Performance; Checking The Flow; Cleaning The Optical Chamber And The Rh/T Sensor; Figure 10 Asc Support Removal - Teledyne T640 Standard Operating Procedure

6. Review internal pump flow in Dashboard or Home Screen to ensure the 5.0 lpm flow is
reading as expected: >Main Menu > Home >Dashboard.

11.3 Checking Pump Performance

There is one pump associated with the T640 an internal (operating at 5 lpm). The 5 lpm pump
must maintain proper flow for measurement accuracy. Check the performance level in the
Dashboard (If the parameter is not found in the Dashboard, configure the Dashboard to add it;
see Section 3.1.9 of the T640 User Manual).
•
Pump PWM should be running between 35% and 80%.
If the performance levels are out of range, refer to Table 6-2 for troubleshooting guidance.

11.4 Checking the Flow

Check the Sample Flow level in the Dashboard. (If not found in the Dashboard, add it through
the Dashboard configuration page; see Section 3.1.9 of the T640 User Manual). If out of range
(5.00 lpm, +/- .25 lpm for sample flow), refer to Table 12-1 for troubleshooting guidance.

11.5 Cleaning the Optical Chamber and the RH/T Sensor

For this procedure, ensure the channels are "In Maintenance"
1. Power down the monitor and unplug.
2. Remove the ASC support, which straddles the sensors. Four screws secure that support to
the floor of the instrument, two on each footing (Figure 9).

Figure 10 ASC Support Removal

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DEP 03-21
Revision No. 0
November 2017