Thermo Scientific 5028i, Instruction Manual

Page: 41 / 330

Installation
Acceptance Testing and Startup Procedures
Thermo Fisher Scientific Model 5028
i
Instruction Manual 2-5
the filter tape. The flow pressure is the pressure differential across the
orifice.
Table 2–1.
Pressure Units Conversion
Pressure Conversions
mmHg = atm x 0.0013158
mmHg = inHg x 0.0393701
mmHg = hPa x 1.3332237
Assuming adequate time has passed for thermal equilibration
(approximately 1 hour), and the vacuum pump has been drawing room
air into the instrument, compare the ambient temperature, sample
temperature, and flow temperature to your NIST traceable thermometer
placed at the inlet tube (see Figure 2–1 ).
Note
Please be sure that the pump exhaust or any other heat source
is not influencing the sensor reading of the temperature/RH cable
assembly.
s
Figure 2–1. Model 5028
i
Sampling Room Air Under Stable Conditions
Record the temperature sensor readings from the Model 5028 i
and compare to your NIST-traceable thermometer. Each of these
measurements should be within ±2 °C tolerance of your NIST-traceable
thermometer. Within this tolerance, the temperature sensors have
passed the acceptance test.
If the sensors are slightly out of tolerance (±3 °C), the acceptance test
should be classified as marginal. If the sensor performance is outside this
range, please perform a temperature sensor calibration.
One-Point Temperature
Verification