Humboldt H-1322B Marshall and TSR Compression Machine - Manual (Page 7)

Running a Test
1 . Turn on the rear power switch, install a pen in the holder by turning about
three turns clockwise with light finger pressure only, and place a sheet of chart
paper under the holders .
2 . Place the lever in the Pen Down position and zero the pen on the chart with
the positioning knobs, placing the pen at the origin of the graduated area of
the chart . This will ensure complete recording initiated by sensing of the load .
Select the load range with the selector switch on the recorder and
place a check in the box for that range on the chart .
3 . Place the conditioned specimen in the breaking head and onto the
machine platen .
4 . Push the Up button that has a 4-second delay to begin pen contact, travel
and loading after which the test proceeds automatically .
5 . Upon reaching the stability load or TSR peak, the machine proceeds until
a 5% reduction in load occurs, at which time it stops, waits 4 seconds, then
reverses and goes to the lower limit of down travel .
6 . Load the next specimen and repeat Step 4 .
7 . Upon completion of tests move the recorder lever to the “Load” position
and remove the chart paper .
Important - If a test is incomplete for some reason, reset the processor by turning
off the machine power with the rocker switch on the rear panel .
Calibration
As received, the machine is calibrated to 1% accuracy or better over
the full range .
When it is necessary to check calibration proceed as follows:
CAUTION
IMPORTANT: Press the Down travel switch to lower the platen
to its lower limit of travel as indicated by the red (Ready) light
coming on, then press the red Stop button, which deactivates the
automatic test function .
Use a load ring or load cell as a reference gage to check
calibration by placing it directly under the machine's load cell
(in place of the Marshall or TSR breaking head) .
Remove the Crank hole plug (left side of casing) .
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