Komatsu HM400-5 - External Display Lamp

Example of payload display when an error occurs
• When an error occurs in the suspension pressure sensor, clinometer sensor, etc., “-----” is displayed, since
the payload cannot be calculated.
• The payload displayed in the loading pit (just after loading) may be a little different from the value displayed
in the dumping pit.
This is caused by the effect of the frictional force of the suspension, and cannot be eliminated.
A little change of the displayed value between measurement places is not caused by a trouble in the pay-
load meter.
EXTERNAL DISPLAY LAMP
The external lamps display the payload as follows.
Color of lamp
HM400
1 Green 20.0 t and up
2 Yellow 36.0 t and up
3 Red 42.0 t and up
If there is difference between the payload and the lighting of
the external display lamp, the model setting may be wrong.
In such case, consult your Komatsu distributor.
Display of prediction
When the load changes in steps for each bucket loaded, the system estimates the total load weight if one more
bucket is loaded, and flashes the appropriate lamp to prevent overloading.
The predicted load display and actual load weight display are shown at the same time.
Expected number of bucket loads: 4
1st bucket: 9.5 t
2nd bucket: 9.5 t (total: 19.0 t)
3rd bucket: 9.5 t (total: 28.5 t)
4th bucket: 9.5 t (total: 38.0 t)
When the machine is loaded in this way, the external display lamps light up as shown in the following chart.
Number of buck-
et loads
External display lamp Remarks
1st time
•
Since the actual payload is 9.5 t, no lamp lights up.
•
Since the predicted payload is 19.0 t, no lamp lights up.
2nd time
•
Since the actual payload is 19.0 t, no lamp lights up.
•
Since the predicted load weight is 28.5 t, the green lamp
flashes.
3rd time
•
Since the actual payload is 28.5 t, the green lamp lights
up.
•
Since the predicted payload is 38.0 t, the yellow lamp
flashes.
4th time
•
Since the actual payload is 38.0 t, the green and yellow
lamps light up.
•
Since the predicted payload is 47.5 t, the red lamp flashes.
HANDLING PAYLOAD METER ATTACHMENTS AND OPTIONS
6-8