Awareness Technology, Inc. Stat Fax 303 Plus Operator’s Manual Rev. J 7
Voltage Select Switch
Locate the voltage select switch on the rear panel. This is a 2-position slide switch that will
configure the instrument to accept either 230V or 115V input. Do not connect equipment to the
power supply before changing the line voltage selection switch.
Warning: To prevent permanent damage to the instrument, this switch must be set
for the appropriate input voltage before powering up.
When you can see the 230V label, the instrument is set for 230V input. If you plug the
instrument into an 115V power supply while 230V is selected, the instrument will have
insufficient operating power.
To select 115V input, insert a straight screwdriver blade (or similar instrument) into the slot on
the switch, and slide it into its alternate position. Upon sliding the switch, you will see the 115V
label appear.
Warning: If the instrument is configured to accept 115V and you plug it into a 230V
power supply, the fuses will blow and permanent damage to the electronics may result.
Assure Clean Power Availability
The circuit used should be substantially free of large voltage transients (Kilovolt amp loads) such
as large pumps, large centrifuges, refrigerators and freezers, air conditioners, large autoclaves,
ovens, and dryers. The instrument may fail to operate normally if the power supply is
interrupted. If this occurs, turn the instrument off for a moment. When you turn the instrument
back on, it will resume normal operation, but a standard curve which was not stored in
nonvolatile memory will be lost.
Fuse Requirements
The fuses are located internally in the instrument; there are two fuses, fusing both sides of the
main power supply. Fuse failure is a very rare occurrence and should indicate malfunction of the
equipment requiring service by qualified personnel.
The fuses used within this instrument are 1/2 Amp T rated (slow blow), 250 V. Cartridge size is
3AG or size “0”, dimensions 1/4 x 1-1/4” (6.3 x 32 mm). For continued protection against risk of
fire, use the same fuse for either 115 or 230 V line voltage selection. Disconnect power cord
from mains supply before replacing fuses.
1.5.2 Serial Port
The serial port on the back of the instrument echoes the data shown on the internal printer,
except for data printed in graphical mode (i.e., standard curve plots). You may use the serial
port with the strip reader to output to a PC, but this will require a cable and software not provided
with the reader. Contact your dealer for the appropriate cable. Remember that the microstrip
reader only sends data out. It does not accept any input from the external equipment.
The serial connector of the reader is located on the right side of the rear panel. Interface: “DB-
9P” is configured for data terminal equipment (“D” connector with 9 male pin contacts.) Pin 1 is
ground, Pin 2 is the transmit data output.
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