MicroTim XB User Manual
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MicroTim XB User Manual

Precision digital barometric altimeter / barometer / vsi
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MicroTim XB
™
Precision Digital Barometric Altimeter / Barometer / VSI
User Manual
Document Revision 1.0
Firmware Version 3.0

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Summary of Contents for MicroTim XB

  • Page 1 MicroTim XB ™ Precision Digital Barometric Altimeter / Barometer / VSI User Manual Document Revision 1.0 Firmware Version 3.0...

  • Page 2: Table Of Contents

    Activating Accumulator Mode ......11 Using the Vertical Accumulator ......11 8.2.1 Zeroing the Accumulator......12 8.2.2 Accumulator Units........12 8.2.3 Accumulator Deadband .......12 8.2.4 Accumulator Sampling Rate......12 Exiting Accumulator Mode .........12 MicroTim XB Messages..........13 Changing the Battery ..........13 Appendix A – Frequently Asked Questions ......14...
  • Page 3 WARNING! DO NOT OVER-TIGHTEN THE SCREWS when changing the battery. Warranty does not cover stripped screw holes. The battery cover is recessed only fits correctly one way to clear the battery and Observe the recessed battery cover when replacing the battery. Serial Number_____________________ Firmware Revision Number__________ Checked: _________________________...
  • Page 4 MicroTim XB is a precise, durable, low-power digital barometric altimeter. Here are some of the major features of the MicroTim XB altimeter: Lightweight and portable. • Ultra Low power consumption. Runs for many months on a single replaceable AAA penlight •...

  • Page 5: General Operation

    (ASL, AGL, BOTH) for 5 seconds. Units MicroTim XB displays altitude in feet and barometric pressure in inches of mercury by default. Three sets of units are available: 1) Altitude in feet, barometric pressure in inches of mercury (default).

  • Page 6: Display Mode Examples

    2) The firmware version, ‘frn’ followed by the firmware version. 3) A screen test, cycling from ‘0000’ to ‘9999’. 4) The defaulted barometric pressure, 2992. then MicroTim XB resumes normal operation with the default settings. 2 Display Mode Examples ASL Display Example This is the altitude above mean sea level, also referred to as MSL.

  • Page 7: Keypad Function Details

    MicroTim XB is 652 units BELOW ground level. 3 Keypad Function Details There are three keys on MicroTim XB, not six. Each key has 2 functions: 1. A primary function (upper text) activated by quick press/release. 2. A secondary function (lower text) activated by holding the key down for 5 seconds then releasing.

  • Page 8: Setting The Barometric Pressure

    Once field-elevation mode is achieved, pressing the alt keys now immediately displays the newly adjusted altitude. In this mode MicroTim XB does not display the barometric pressure at all but still adjusts the altitude by 0.01 inHg (0.339 mbar or about 9.3 feet) with each keypress.

  • Page 9: Barometer Mode

    6.2.1 Calibrating Barometer Mode by Known Elevation If you know the elevation MicroTim XB is at, you can calibrate the barometer by entering this elevation. Press the keys until the correct elevation appears on the screen. The elevation will increment in 9.3 foot steps, equivalent to 0.01 inHg at sealevel.

  • Page 10: Barometer Units

    Using VSI In vsi-mode, MicroTim XB displays your vertical speed in units per minute (feet per minute by default). A ‘+’ sign indicates climb, and a '-' sign indicates sink. Some examples of VSI readings are:...

  • Page 11: Vsi Units

    5 seconds then releasing the key. The system reset will begin when the key is released. During the reset MicroTim XB will show the serial number ‘sern’ and firmware revision number ‘frn’ followed by a screen test starting with ‘0000’ and ending with ‘9999’.

  • Page 12: Zeroing The Accumulator

    Be aware that in slow mode, brief changes in altitude can be missed. For example a 10 foot vertical dip lasting 10 seconds may not register on MicroTim XB. Fast mode (the default) has a better chance of detecting this 20 feet in vertical distance traveled.

  • Page 13: Microtim Xb Messages

    10 Changing the Battery The MicroTim XB digital is a low power device which will operate for months on a single high-end (for example ‘Energizer E2’) ‘AAA’ size penlight battery. A high quality alkaline battery is obviously preferable in terms of battery life.

  • Page 14: Appendix A - Frequently Asked Questions

    Question: This is a barometric altimeter. How does the sensor access the local pressure? Answer: MicroTim XB has an unsealed rear cover which allows the internals to equalize with external air pressure. In addition, a small hole in the cover is present to ensure equalization. The rear cover and this small hole should never be sealed or the accuracy of the unit will be severely affected.
  • Page 15 Question: What does the warranty cover? Answer: MicroTim XB is warranted for a period of one year from date of purchase against defects in workmanship. The following items are NOT covered: 1. Bleeding LCD displays (black spots). This is a direct effect of being overly shocked (dropping from a significant distance onto concrete, for example) or being subjected to excessive cold/hot temperatures.

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