Setup Comms; Service Menu - Instrutech Hornet User Manual

Instruction Manual
current takes place. The user has the choice of programming the AUTO IE TRIP point anywhere between
1.00E-06 to 1.00E-04 Torr.
Example: If AUTO IE TRIP point is set to 1.00E-05 Torr, then the ion gauge can operate at an emission
current of 100 µA over a pressure range of 5.00E-02 Torr to 1.00E-05. The emission current will then
automatically switch to 4 mA for pressure ranges below 1.00E-05 Torr.

5.8.4 SETUP COMMS

- BAUD RATE [Factory default = 19200, 8, N, 1]
This sets the baud rate for the RS485 communications. The baud rate can be set to other values manually
using the front panel soft-keys.
- ADDR [Factory default = 1]
This is the lower nibble of the one byte RS485 device address. Assuming the address offset (ADDR OFFSET)
is equal to 0, setting the ADDR to a 5 will make the address be 0x05 in hexadecimal. A 15 in decimal will set
the ADDR to 0x0F in hexadecimal.
- ADDR OFFSET [Factory default = 0]
This is the upper nibble of the one byte RS485 address. Assuming the address (ADDR) is 0, setting the
address offset (ADDR OFFSET) to a 5 will make the address be 0x50 hexadecimal. Setting the offset to 16
will make the address be 0x10 hexadecimal (see following table).
┌ -------------------------------------ONE BYTE-----------------------------------┐
ADDRESS
DECIMAL
1
5
15
16

5.8.5 SERVICE MENU

- INFO
This screen provides the installed firmware version number. For example, when this menu choice is
selected, a number such as '1769-103' may be displayed. The firmware part number is '1769' and the
version is '103'.
- OP TIME
This screen provides information on how long the unit has been powered on regardless of filament
operation.
InstruTech, Inc.
┌--------------------------BINARY ADDRESS-----------------------------┐
ADDR OFFSET
┌Upper nibble┐
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 1
(BINARY)
ADDR
┌Lower nibble┐
0 0 0 1
0 1 0 1
1 1 1 1
0 0 0 0
IGM401 Hornet
ADDRESS
HEXADECIMAL
01
05
0F
10
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