Description

The VMU250 replaces the VMU210. It operates the same as the VMU210 but utilizes different electronics and a new product case.

The VMU250 has an extensive array of standard features which include:

• Two rotary controls to make measuring much faster and simpler for the operator
• Wide calibration range:  0.00000001 to 99999999, entry via keypad, available in any unit of measure
• Wide measurement results range:  Approx. 0.000000001 to 71999999280
• Horizontal, Vertical and Diagonal Measurements, all visible at the same time (selectable)
• H/V and V/H Ratio measurements (selectable)
• Widescreen camera correction, very simple and only needs to be set once
• Calibration entry via a numeric keypad
• Extensive but easy to use menu system to customize unit operation
• Dedicated switches for the most used functions
• All settings are held in non-volatile memory so the unit powers up just as it was when turned off, even if accidently unpowered
• Nine user memories with label function for easier recall
• Extensive RS232 remote system, can control the unit or read data from it
• Real time Clock and Calendar may be optionally displayed with a variety of layout settings
• Password protection to avoid tampering with calibration and system settings, yet still allow measurements to be made, several settings are available
• 17 standard units of measure provided, plus 8 user programmable units of measure, up to 4 characters each
• Can be calibrated on the X or the Y axis
• Line origin can be set to upper left or lower left
• Full Line or Box mode
• Lines can be moved independently, paired (tracking) or mirrored (switch selectable), making measurement much easier.
• Number of displayed digits (precision) can be selected for easier reading
• Readout display can be set to one of over 200 colors
• Lock function for each control, on each axis
• Readout can easily be moved anywhere on screen
• All digital processing for incredible repeatability and accuracy
• Optical encoders avoid jitter problems for precise measurements
• Mounted in a durable plastic case with a sloped front that is comfortable for control operation.

The VMU series of video calipers from MicroImage Video Systems utilize extensive digital processing to maintain high accuracy and repeatability. Usable with most standard definition NTSC and PAL video cameras, the VMU250 provides fast, efficient and affordable non-contact measurement.

The MicroImage VMU series of video measurement units are designed to be highly flexible and powerful, yet easy to use. Unlike analog based units, all mathematics are processed digitally, allowing the VMU series to maintain consistent precision regardless of the scale factor. All lines are digitally rendered for solid, repeatable performance over time without drift. High precision optical encoders are used for the position controls, eliminating jitter which can plague analog based measurement devices. The VMU250 includes high reliability, industrial grade encoders.

The array of front panel switches make the VMU series easy to use on a day-to-day basis. Instead of hunting through menus, switches are provided for many commonly used functions, saving considerable time and effort. Customer feedback has continuously proven this to be a good choice even though it can seem a little overwhelming at first glance. The VMU250 uses a new front panel switch arrangement with higher reliability and larger switch surfaces. It has fewer switches but still supports all of the functions of the previous models without resorting to menus. Functions are logically grouped and LEDs provide feedback for many of the mode settings.

Using the VMU is easy. A size reference is placed in the field of view and the cursors are moved to the reference dimensions. The calibration value is entered on the keypad and can be set to the X or Y axis. This provides far more range and precision than using a rotary control to set calibration. From this point forward, the unit is calibrated, provided the distance to the object or magnification (zoom) doesn’t change. Nine memories are provided to store multiple calibrations for different optics/magnifiers, saving significant time. In addition, each memory can be labeled to make recall easier. The units remember all settings in non-volatile memory when turned off.

The readout display can be moved virtually anywhere on the screen. Any combination of x, y, diagonal, H/V ratio, V/H ratio measurements plus time and date can be displayed at the same time. The color and background of the readout display can be changed, as well as the color of each of the lines. Any line can independently be turned off, displayed as solid, or serrated with numerous styles for maximum flexibility.

The VMU250 has Widescreen Camera Correction, a very simple method to calibrate the VMU for non-square pixels, can correct for virtually any pixel aspect ratio.

A number of additional features have been added to simplify continuous usage. Cursors may be moved fully independently, may be moved in pairs where one control moves both cursors on the same axis and the second control changes the spacing between them or use mirror movement where one control moves both lines and the other control adjusts the separation based on the center point between them. Each control may be independently locked to avoid inadvertent adjustment and there are separate locks for the X and the Y movement. Controls can also be independently locked from within the menu system, regardless of the state of the lock button as further protection against accidental change. The lines may be displayed full screen or can be displayed as a box on screen. A bypass switch allows the user to quickly turn the line and readout display off or on as needed.

An RS232 remote port is now standard on all VMU250 units. It can allow the user to set many of the parameters or query the unit. This makes possible more automated systems or allows the user to capture the measurement data for archiving. It is up to the customer to implement the interfacing software. MicroImage Video Systems will provide complete documentation on the interface protocol which is now unified across multiple product lines.

All VMU series products can be powered from a clean +12VDC, negative ground power source. MicroImage Video Systems can provide board level product, private labeling or even custom functions. The units are based on a new a MicroImage Video Systems video platform which is highly flexible and programmable.

At MicroImage Video Systems, we incorporate suggestions from customers when possible. Several customers have suggested password protection so that calibration settings could not be changed. We added this capability to all production units with several levels of password protection. It also has a programmable auto time out feature. In the event a key is not pressed within a certain amount of time, the protection is automatically re-enabled. This is important in case it becomes forgotten after a setting is changed. Password protection can also be disabled for easy access in a safe environment.

We also use the VMU in our operations for incoming inspection and quality control. Using our own products has allowed us to fine tune the user interface and streamline product operation. In fact, we use many of our own products for testing operations. While some are customized, many are in their standard product form.

Rack mount units are not available for this product.

The VMU250 is available packaged (cased) or as a board level product for OEM applications. Power is provided by a universal power supply (included with cased products) or it can be operated from +12VDC (negative ground). Board level products do not include the power supply and a clean 12VDC power source must be provided.  The unit is packaged in a high impact plastic enclosure. Board Level, OEM and Custom products are also available. Please contact MicroImage Engineering for additional information.

at MicroImage Video Systems, we have been producing video calipers since 2001. We still service units back to the very beginning if needed, maintaining spare parts. When purchasing a MicroImage Video Systems product, you can be assured of continued support. In addition, new products can be drop in replacements for older units if new features or replacement are required.

The VMU250 has a one year parts and labor limited warranty.

Printable Literature (coming soon)

VMUx50 Operation Manual (opens in new tab)