08354B DCN7877
Teledyne API T640 PM Mass Monitor
60
OPERATION
Upon startup, sampling will be calculated and displayed after a warming period
during which time the LED temperature stabilizes for reliable readings.
4.
SENSOR CHECKS AND ADJUSTMENTS
The following equipment, supplies, and expendables are required for sensor checks
and adjustments:
•
for ambient temperature, ambient pressure and flow(s): auditing device
(NIST-traceable pressure, temperature, and flow standard with actual
volumetric conversion)
•
for PMT Adjustment: SpanDust™ bottle (provided with instrument)
•
for Leak Test: Leak Check / Adapter Kit (TAPI PN 084910000)
IMPORTANT
IMPACT ON READINGS OR DATA
Calibrate Pressure prior to calibrating Sample or
Bypass Flow
There are four basic checks and adjustments that should always be performed in a
specific order as shown below:
•
Ambient temperature sensor check
•
Ambient pressure sensor check (and calibration, if needed).
•
Sample and Bypass flow sensor check(s) (and calibration, if needed).
•
PMT verification using SpanDust™ (and adjustment, if needed).
•
Leak Test
All of these functions are performed in the Calibration menu of the instrument
software.
See maintenance schedule in Section 5.1 for recommended intervals for these
procedures.
For the Pressure and Flow Calibration menus, note that the “Measured” parameter
provides the value measured by the instrument, and the “Actual” parameter is the
value that is to be input from the reading measured by the external auditing device.
The T640 has been provided with a “short temperature probe” for the purposes of
operating flow calibrations as well as PMT checks inside indoor shelters. The
purpose of this is for the ambient temperature measurement to match the flow
device at the location of the flow standard. In the case of the PMT adjustment, it is
so the volumetric flow is relative to the indoor air temperature.
Summary of Contents for T640
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