ScienTECH SA Analytical SA 210 - External Weight Autocalibration

9
Balance Funcons 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 inter-
nal calibration weight it will have a suffix of IW after the model number. Please use the procedure for Autocali-
bration to calibrate the balance to a 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 ac-
cording 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, SA/ZSA models need a ±0.033mg tolerance weight or better, SP/ZSP models
need a ±0.33mg tolerance weight or better, SL/ZSL 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 bal-
ances 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, 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 alter-
nating 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 select-
ed weight are displayed.
6
Do not remove the weight from the pan.
The display will momentarily blink, then the select-
ed weight will continue to be displayed. In approx-
imately 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 weigh-
ing mode. For balances with an internal weight
press MODE to complete this step. This will not
change the internal weight calibration factor.
7 Remove the calibration weight. The display returns to zeros.