Installation
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2.4 Grounding the Scale Base
BenchMark HE-X can build up a static electricity charge during weighing operations. If powerful enough, the charge can travel
through the load cell cable to the indicator. The unit should be adequately grounded so static charges and transient electrical
surges can drain directly to the ground. It is recommended to connect the scale base to an AC ground circuit using at least
#12 ga. wire. The BenchMark HE-X has a grounding hole for a grounding screw located on the bottom of the lower frame.
2.5 Calibration
It is recommended that the scale be exercised by loading it to near capacity two or three times before calibration to ensure
everything is seated. See the specific indicator manual for the proper calibration procedure.
To calibrate, see the following procedure:
1. With no load on scale, place the indicator in its calibration mode and perform a zero calibration.
2. Place certified calibration weights on platform equal to 70%–100% of scale’s capacity. If several weights are used,
distribute them evenly around the platform.
3. Perform a calibration.
4. Remove certified calibration weights and check the zero reading. If necessary, repeat the calibration process.
See the indicator manual for the specific indicator calibration procedure.
2.6 Overload Stop Adjustment
The scale contains an overload protection screw on the bottom of the scale underneath the load cell and overload protection
stops in the four corners.
Figure 2-1. Overload Protection
1. To check or set the overload screw underneath the load cell, place 125% of capacity on the center of the scale.
2. Using the appropriate hex wrench, screw in the overload protection until it touches the load cell then back it off 1/6 turn.
3. Recheck calibration.
4. To check or set the corner overload stops, load the scale corner with 30% of scale capacity then adjust the screw
under that corner to just touch the top frame then tighten the locking nut if one is used.
If no locking nut is used, apply a drop of an industrial sealing agent to seal threads.
5. Repeat this process for each corner.
Ensure the load cell is not touching the overload protection screw below the load cell with the load on the corner.
Note
Overload Stop
Overload Stop
Overload Screw
IMPORTANT
Note
Summary of Contents for BenchMark HE-X
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