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Summary of Contents for DigiVac Bullseye Precision Gauge Piezo
- Page 3 The Bullseye Precision Gauge Piezo was developed to make vacuum measurement easy, useful and intuitive. The Bullseye Piezo is a rugged portable vacuum instrument that is sensitive and highly accurate. It was designed to suit the demands of field use. It’s amazing. Its main...
- Page 4 While this vacuum instrument has many features, it is very simple to use. Start by unpacking the unit to verify you've received everything you've ordered. • Vacuum instrument with white backlight and purple rubber boot • Attached: 7' sensor cable with keyed connector designed to thread directly into the sensor •...
- Page 6 The Bullseye Precision Gauge Piezo incorporates an isolated Piezo resistive sensor. A piezo resistive sensor is effectively a silicon strain gauge. When the pressure is placed upon the silicon, the resistance of a MEMS measurement resistor changes which can be measured by the sensor electronics.
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Page 7: Display Options
would corrode a steel bolt thrown into it. Over time the sensor will degrade and cease to operate. The isolation in the 775i sensor is achieved through a stainless steel diaphragm that comes in contact with the media to be measured, commonly called the wetted surface. So use the 775i with diesel fuel, gas, nitrogen or alcohol, it’s happy! The 775i sensor was designed to thrive. - Page 8 The bar graph visualizes the current sensor reading with a stepped bar. The pumpdown graph plots time horizontally and log pressure vertically. The vertical pressure scale is logarithmic, indicating order of magnitude from one mTorr to atmosphere. The autoscaling (or, autoranging) time graph (AKA the line graph setting) is a microscope into the pump down data.
- Page 9 Low Resolution The Low Resolution format has two digits of precision. For example, an internal vacuum value of 1234 millitorr (μm Hg) would be displayed as 1.2 Torr in the Low Resolution numeric format with Torr units. This number format also gives a filtered number depending on the accuracy of the gauge in the pressure range of measurement, which results in a ‘quieter’...
- Page 10 In any display mode, the UP and DOWN buttons turn the backlight on and off (respectively), the SEL button enters the configuration menu, and the PWR/EXIT button turns the gauge on or off. The battery indicator shown at full strength In practice, this indicator changes based on the current level of pressure.
- Page 11 The bar graph visualizes the current sensor reading with a 6-stage stepped bar. microscope The auto-scaling (or, auto-ranging) time graph is a into the pump down data. Maximum & Current or Minimum value most recent is measured pressure range In this mode, the pump down graph is shown with a linear pressure scale that is fit to the pressure range of the data set.
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Page 12: Bluetooth Operation
Vacuum Gauge Application for remote, real-time vacuum monitoring via Apple Store at https://appsto.re/us/B1Ix5.i ,or Google Play Store at https://play.google.com/store/apps/details?id=com.digivac.bullseye ranging up to 300 feet under ideal conditions. To enable Bluetooth monitoring, scroll to the menu section marked Bluetooth, and enable or disable the signal with the up or down arrow. -
Page 13: Vacuum Calibration
DigiVac. There is inherent drift in all sensors including the DigiVac 775i piezo resistive sensor. Drift is specified in the datasheet, but the specification is typically a worst case scenario as drift is not easily predicted and depends on operating environment. - Page 14 Press the circular arrow Select button to cycle through the calibration presets. Each function will capitalize when highlighted. Clear existing vacuum offsets by pressing the UP and DOWN buttons simultaneously; the number displayed next to the preset will reset to zero.
- Page 15 calibration number up and down so the unit reads exactly “2 Torr, or 2000 0” • Press the select button until the “VAC” variable is capitalized • Pump the vacuum system down to exactly 2 millitorr, and maintain that pressure •...
- Page 16 See your vacuum readings in either numbers or easy to read graphs Bluetooth Capabilities Receive your pressure readings on your phone or tablet with the DigiVac app Digital Graphs Easily view line graphs and time horizon of 1 minute and 1 hour...
- Page 17 This instrument and many similar instruments are calibrated in microns or "milliTorr." It is appropriate to discuss what microns are and to relate microns to other measures of pressure and vacuum. Microns are not really a measure of vacuum at all, but rather of absolute pressure.
- Page 19 Versatile digital vacuum gauge that you can monitor right from your phone or tablet ▪ (Apple ios and android) Enables remote monitoring and troubleshooting ▪ Set low and high alarm from your phone ▪ Email vacuum data to document leaks, baseline pressure or pump-downs ▪...
- Page 20 DIGIVAC product, including, but not limited to, any vacuum system, engine, vehicle, factory, or the like. In the event, a court of law with proper jurisdiction finds DIGIVAC liable to you for any purpose, you agree and acknowledge DIGIVAC’s maximum liability shall not exceed the purchase price of one unit of product...
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