Barometer Troubleshooting and FAQs

Barometer, order code BAR-BTA, $71
Specifications and User Guide

TROUBLESHOOTING
-The Barometer measures pressure in a very small range around sea level atmospheric pressure (0.8 to 1.05 atm, 81 to 106 kPa, or 608 to 798 mm Hg). Make sure that the Barometer is not in a situation where the pressure is greater or lower than the range of the device.
-If the Barometer readings do not compare with the barometric pressure reported by a local airport or television station, then it is because the broadcast pressure is a corrected value. If you want your Barometer to read sea-level pressure (to compare with a television station), adjust the Barometer's readings with the offset potentiometer. Use a small jeweler's screwdriver to tune the potentiometer, which is positioned in a hole on one end of the Barometer. It is a 15-turn potentiometer, allowing for gradual adjustment.

RELATED TIL ENTRIES
-TIL 1138: Why doesn‘t my barometer read the read the same as the weather forecast?

SPECIFICATIONS
-new order code: BAR-BTA
-old order code: BAR-DIN
-Sensing Element: SenSym SDX15A4
-Pressure Range(as shipped): 0.8 to 1.05 atm (25 to 31.5 in Hg)
-Maximum Pressure that the sensor can tolerate without permanent damage: 30 psi or 61 inHg or 207 kPa
-Sensitivity: 436 mV/in Hg or 13.06 V/atm
-Resolution (as shipped) using a 12-bit, 5 volt A/D converter (LabPro, Go! Link, ULI II, Serial Box): 0.003 inHG
-Resolution (as shipped) using a 10-bit, 5-volt A/D converter (CBL 2, CBL, original ULI): 0.01 inHg
-Combined linearity and hysteresis: typical +/-0.1% full scale, maximum +/-0.5% full scale
-Response Time: 100 microseconds

CALIBRATION
-Calibrate? No. Each Barometer is set to match the stored calibration before shipping.
-If you wish to calibrate the Barometer, you should perform a one-point calibration with LoggerPro and a computer. Plug in the Barometer and start LoggerPro. Choose Calibrate from the Experiment menu. Make sure the check box next to one-point calibration is checked and click on Calibrate Now. Enter the corrected value for barometric pressure. Click Keep and then click Done. Make sure the units for the value you enter match the units in the calibration.

RELATED VERNIER PRODUCTS
-Gas Pressure Sensor, for greater range of values, Gas Pressure Sensor, order code GPS-BTA, $83