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Step 4 is the first step in the actual weight calibration process. A
4-digit number will be displayed in blue at the bottom of the screen.
If nothing has been perturbed during the heating process, the zero,
0 gram, or 0.00 mN calibration should be stable as indicated by the
4-digit number and “NEXT STEP” can be pressed after 30-40 seconds.
If the 4-digit number is not stable, then wait until the number has
stopped fluctuating before pressing “NEXT STEP”.
Step 5 is the 2 gram weight calibration. Place the 2 gram weight in
the pan closest to the transducer as to simulate a mounted muscle
pulling on the clamp attached to the transducer. Remember, a 2 gram
weight in a 90° vector is cut in half, and the transducer will only detect
1 gram or 9.81 mN of force. The weight placement should cause a
positive increase in the 4-digit number. Wait at least 30 to 40 seconds
for the applied force to stabilize before pressing “NEXT STEP”. Once
the 4-digit number has stabilized, press “NEXT STEP”.
Step 6 is to verify that the calibration was performed correctly. The
“Force Chamber 1” reading should be 9.81 ± 0.1 mN. If the “Force
Chamber 1” reading is off by more than 0.1 mN, then remove the
weight, press “BACK” to return to Step 4, and repeat the calibration
process. If the “Force Chamber 1” reading is satisfactory, then press
“NEXT STEP”. Calibrate the other chambers in the same manner.
2. pH Calibration Menu (Optional)
The pH Module in the 820M is locked by a code. If the screen shown
turn up, a code is needed from DMT to unlock the pH module.
By ordering the pH sensor from DMT the pH sensor is delivered with
the unlocking code and a quick guide how to do it. Entering the code
will open for the pH Calibration menu.
