Scientech Zeta Series - Manual (Page 7)

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The MODE Button:
Pressing the MODE button starts the unit of weight cycle as follows: grams(g), carats(ct), pennyweights(dwt), troy ounces(ozt),
ounces(oz), pounds(lb), kilograms(kg) and milligrams(mg). When the desired unit of weight appears, press the MODE button a
second time to select that unit of weight.
An optional, factory installed, user specified, custom unit of measure is available. If you have this special unit of measure feature in
your balance, (A) appears in the unit of weight cycle in addition to the other options. Press the MODE button to select this option.
The SEND Button:
Pressing the SEND button sends the information on the balance’s display to an external device via the RS-232 interface.
Note: Scientech balances are DTE (computer) devices. If communicating to another DTE device (ie computer), a Scientech
RS-232 cable, PN10697, or normal null modem cable is required. If you are communicating to a DCE device
(printer), a serial cable is required. Scientech offers a serial cable for your convenience.
You may send the time and date along with the weight reading when you press the SEND button or you may send weight readings
automatically at user specified time periods (see the Bi-directional RS-232 Command Set, Type 4 Commands section for details).
Weight readings may also be sent to a computer or printer continuously every 200 milliseconds (see the RS-232 Front Panel
Configuration section for details). Weight readings may be sent automatically when the balance reaches stability (see Selectable
Filters section).
Balance Functions and Features:
Autocalibration (CAL 1) - Using an External 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 connected to an electrical outlet 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, ZSA
models need a ±0.033mg tolerance weight or better, ZSP models need a ±0.33mg tolerance weight or better and ZSL models need a
±3.3mg 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 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 in the
center of the balance’s weighing pan.
The display stops flashing, the alternating weights, 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.