Scientech 12000 Series - Manual (Page 8)

8
Balance Functions and Features:
Autocalibration – To Calibrate the balance to an External Weight:
This procedure calibrates your balance to an external calibration weight. If your balance has a motorized internal calibration weight
(9000-INT), please use the procedure for Autocalibration Using 9000-INT Motorized Internal Calibration Weight.
Note: Dual range models must be placed in HI range before starting the calibration procedure.
Note: For correct calibration weight refer to specification charts in the back of the manual.
Note: The balance should be warmed up for at least one (1) hour prior to calibration and leveled according to the
Unpacking and Setup section.
Note: Perform autocalibration every time you move your balance.
Calibrate the balance using a recently certified external calibration weight. Metrology handbooks state that the calibration weight
utilized to calibrate a balance should have a tolerance no larger than the readability of the balance divided by 3. Therefore, SM
models need a ±0.0033mg tolerance weight or better, SA models need a ±0.033mg tolerance weight or better, SP models need a
±0.33mg tolerance weight or better, SL models need a ±3.3mg tolerance weight or better, and SG models need a ±33mg tolerance
weight or better. In addition, these same handbooks recommend that all balances be calibrated using an external certified calibration
weight even if the balance has an internal calibration weight.
User Action Balance Response
1 Remove any containers or weighing samples
so that nothing is on the weighing pan, then
press the ZERO button
Zeros are displayed
2 Press the RANGE/FUNCTION button (or
MODE and RANGE buttons simultaneously
for dual range balance models)
Balance display cycles repeatedly through PCS, HI OK LO, CAL 1, CAL 2,
T and %.
3 Press the MODE button when CAL 1 appears CAL 1 and a flashing 0 are displayed.
4 Wait 10 seconds for the balance to stabilize,
then press the ZERO button.
The display stops flashing, CAL 1 and a solid 0 are displayed. In
approximately 15 seconds, when this step is complete, a single weight or two
alternating weights will begin flashing on the display.
5 Place one of the flashing weights on the
balance’s weighing pan.
The display stops flashing, CAL 1 and the selected weight are displayed.
6 Wait 10 seconds for the balance to stabilize,
then press the ZERO button.
Do not remove the weight from the pan.
The display will momentarily blink, then the selected weight will continue to be
displayed. In approximately 15 seconds, when this step is complete, the display
will blank, flash “OK”, then display the calibration weight including decimal
places. The balance is now calibrated and in the normal weighing mode.
7 Remove the calibration weight. The display returns to zeros.
Autocalibration – To Calibrate the Balance to a Motorized Internal Weight:
This procedure is only for SA and SM balances with the suffix IW after the model number which means a motorized internal
calibration weight is installed.
Note: Dual range models must be placed in HI range before starting the calibration procedure.
Note: For correct calibration weight refer to specification charts in the back of the manual.
Note: The balance should be warmed up for at least one (1) hour prior to calibration and leveled according to the
Unpacking and Setup section.
User Action Balance Response
1 Remove any containers or weighing samples
so that nothing is on the stainless steel pan.
Then press the ZERO button.
Zeros are displayed.
2 Press the FUNCTION button (or MODE and
RANGE buttons simultaneously for dual
range models).
Display cycles repeatedly through PCS, HI-OK-LO, CAL1, CAL2, T , and %.
3 Press the MODE button when CAL1 appears. CAL1 and a flashing 0 are displayed.
4 Wait 10 seconds. Then press the MODE
button.
The display shows a flashing CAL. This means that the automatic calibration
procedure using the internal weight has begun. The procedure will take about 30
to 90 seconds. When the procedure is complete, the display will blank and then
return to its normal weighing mode. This means that your balance is now
calibrated. If the calibration cannot be completed due to air currents, an unstable
environment (vibration), an incorrect weight, or any other reason; a brief “ERR”
message will appear on the display and the balance will return to Step 3.