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46
SGSM
Drag Check
Before running a gel strength test, it is recommended you perform a Drag
Check. Run the drag check in air.
Always perform a Drag Check after calibrating the transducer. During the
Drag Check, the SGSM will run at 2 rpm and the total time for the Drag Check
will be 33 seconds.
1. Carefully screw the assembled SGSM top cap onto the test cell.
The cell cap should turn smoothly in the test cell threads. If you encounter
resistance, stop turning and unscrew the cap slightly. Then continue
turning until the cap is completely tightened.
2. Once the cap is completely tightened, unscrew it one quarter turn. This
will facilitate disassembly later.
3. Install the SGSM head to the base.
4. Connect the SGSM Head to the UCA with the supplied Ethernet cable.
5. Access the Drag Check routine:
a.
In the software click Utilities → Cell 1 (or Cell 2) → Calibrate → SGSM
Drag Check.
b. In the Onboard Display, go to the Calibrate screen and select “Drag
Check”.
6. Allow the test to run for 33 seconds and select “Save”.
7. Repeat the drag check test to ensure consistency.
The test must have a Delta Raw Force less than 2 gf and a
MaxRawForce less than 85 gf. If the value jumps wildly from one check
to the next, this is an indication that there is a problem with one or more
of the components of the system (bushing, shaft, load cell, etc.). You will
need to inspect the SGSM assembly for problems. See page 63 for
troubleshooting instructions.