Fluke Biomedical DPM1B - Manual (Page 22)

DPM1B
Operators Manual
12
Transducer Sensitivity Test
Only one measurement is required to determine whether or not a
transducer under test meets the manufacturer’s specified sensitivity.
The Tester is used to generate a known pressure (generally 100 mmHg
or higher works best). The excitation voltage of the transducer is
determined from the manufacturer’s specifications. Transducer
sensitivity is calculated as follows:
1. Apply 100 mmHg to the transducer as indicated by the Tester
LCD reading.
2. Record the pressure registered on the pressure monitor
3. Calculate the minimum and maximum pressure readings by
using the transducer’s sensitivity tolerance specifications.
For example: For a 100 mmHg applied pressure with a 1 %
tolerance, the minimum and maximum readings are 99 mmHg
and 101 mmHg, respectively.
4. Compare the readings from Step 2, along with the results from
Step 3. If the readings from Step 2 are within the range
calculated in Step 3, the transducer is within the manufacturer’s
specifications.
Linear Plot
Nonlinear Plot
200
150
DPM-1B
Readings
(mmHg)
Monitor Readings(mmHg)
100
50
50 100 150 200
ehf5.eps
Figure 5. Sample Plot of Transducer Linearity Using the DPM1B