EDjunior Dynamometer User’s Manual
Weigh Bar ® is a registered trademark of Weigh-Tronix Inc. 2 05/16/06 EDJR_U.
Table of Contents Table of Contents ........................................................................................................................ 3 Introduction ................................................................................................................................. 5 EDjr Description .......................................................................................................................... 5 EDjr Front Panel .................................................
EDjunior Dynamometer User’s Manual
Introduction The EDjuniorTM (EDjr) electronic dynamometer from Dillon is a force measurement load sensor and digital readout in one instrument. The EDjr can be used to measure tension or weight. This manual covers the setup and operation of the EDjr. General information is covered in the right column of each page with major sections separated by the black bar shown above. Subheads appear in the left column along with any special notes, cautions or warnings.
If lift hardware (shackles, chains, beams, hoppers, etc.) is used to support the load and zeroed prior to lifting the current load being displayed, you can press the ZERO key for five seconds, the display will show the total load being lifted based on the zero point used in calibrating the EDjr. 6 On/Off key Use this key to turn the unit on and off. ZERO key Use this key to zero the force indicated on the display.
Power On and Annunciators When you power up the EDjr you will see a display similar to the example shown on the left in Figure 2. Depending on permission settings and/or revision of firmware, various soft keys may be in a different location or not visible. Figure 2 Initial displays The display sample above shows several symbols you may see on your display but usually not all at the same time. lbf and kgf are units of force, not weight.
EDjr Setup One of the first things you should do to begin using the EDjr is to set it up to suit your specific needs and equipment. You can access the Setup menu, shown in Figure 3, using the soft keys. Press the appropriate soft key to accomplish the functions listed on the following pages.
Setup Misc Press the Misc key to access the following soft key set (refer to Figure 3): Flash Press this soft key to enable or disable the “display flash” feedback. If enabled, the press of a key causes the display to momentarily flash to give you a visual feedback that the key was activated. Zero Press this soft key to enable or disable the Zero key’s ability to also clear the Peak force value. If you enable this function, press the Zero key to clear the Peak force and zero the load.
O.Load Lists the number of overloads that have occurred since the unit was manufactured. Zero Lists the current zero point compared to the calibration zero point. If the zero point has moved significantly, this may indicate a serious overload has occurred and the instrument should be returned for service. The Test functions can help service technicians remotely diagnose your Dillon instrument by showing information on key internal functions.
EDjr Operation Display Modes The EDjr has two display modes accessible by pressing the Mode soft key. See Figure 4. The first display mode when you power up is the live force measurement mode. Press the Mode soft key and the display changes to peak measurement mode. This mode shows the peak force applied to the EDjr since the last peak clearing action. Delete the peak reading by pressing the Clear soft key. Press the Mode soft key again and the display returns to the force measurement mode.
Figure 4 Display mode menu Press the Mode soft key until the desired display mode is reached.
Troubleshooting Problem Possible Cause Solution EDjr powers on momentarily and turns off Low battery Replace with high quality alkaline batteries EDjr does not power on Low battery Replace with high quality alkaline batteries Batteries installed backwards or no spring contact Insure that positive terminals of both batteries (nub) face inward – towards the black cap. Check that spring is attached to the battery cap. Software reset Remove battery cap & reinstall after one minute.
Safe Operation Keep all the following in mind as you use the EDjr dynamometer. If you overload this dynamometer you could suffer severe injuries or death. The total load on the dynamometer should NEVER exceed the rated capacity. The system capacity is equal to the rating of the dynamometers. The shackle rating should not be used to determine lift capacity of the system. Any zeroed deadload must be considered as part of the ultimate load.
Weighing and Force Measurement Practice The basis for all electronic force measurement or weighing is measurement of stress in a loadcell body. To obtain optimal results it is necessary to establish a few basic rules, otherwise the effect may be a nonlinear or nonrepeatable response. Read and follow these tips and see the illustrations on the next page. Load Centering For accurate performance the force acting on the unit must be in line with the unit.
Good Force Measurement Practice Be sure fixturing does not bind between the body of the EDjr and the shackle! 16 EDjunior Dynamometer User’s Manual
