Scientech Zeta Series - Manual (Page 11)

11
Density Determination:
Scientech does not offer a density determination kit nor do you need one to determine density. Density is mass (grams) per unit
volume (cubic centimeters).
In order to determine density of a solid, place a graduated flask with a known volume of water on the pan of the balance, zero the
balance, and then place the solid in the flask of water. Divide the displayed weight in grams by the increased volume of water. The
result is the mass per unit volume of the solid in g/cc.
To determine the density of a liquid, place an empty graduated flask on the balance weighing pan, zero the balance, then pour the
liquid into the graduated flask. Divide the displayed weight in grams by the volume of the liquid. The result is the mass per unit
volume of the liquid in g/cc.
Security Bracket:
A security bracket is provided on the balance’s rear panel as a convenient method of securing the balance.
Options:
Remote Weighing (7000-04) and Custom Unit of Measure (9000-90) options must be installed at the factory or by personnel
authorized by Scientech. Other options, such as a Scientech printer, may be purchased at any time. Please contact Scientech at
(303)444-1361 or (800) 525-0522 or email us at [email protected] for information.
Optional RS-232 Printers:
Note: Printers must be serial.
Please contact Scientech or one of our representatives for more information. A comprehensive manual is included with each printer
when purchased. All printers are set for a 9600 baud rate and even parity. To change these settings please see the printer manual and
the RS-232 Front Panel Configuration section. The balance display contents can be sent to the printer at any time by pressing the
balance front panel SEND button. Balances only communicate with serial printers.
Many other accessories are available. Please contact Scientech at 303-444-1361 or 800-525-0522 or email us at [email protected]
for more information.
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.
Your balance is equipped with a bi-directional RS-232 compatible interface. The interface is uni-directional (balance send only) when the
local control is set to ON. To enable the bi-directional interface, set the local control to OFF (see the RS-232 Front Panel Configuration
section). The RS-232 connector is a 9 pin D subminiature connector located on the balance rear panel. The pin out and pin descriptions
are shown in Figure 5.
Figure 5 Connector Pin Out
The balance will not output any information under any circumstances unless pin 8 (CTS) is held in an ON state (+3 to +15 VDC).
Interfaces not utilizing the CTS handshake may tie pin 8 to pin 7 or pin 8 to pin 4 to defeat it.
This interface does not strictly adhere to the official RS-232 standard. However, it emulates what has become commonplace in the
microcomputer industry.