Fisher Scientific I903C, Operation Manual

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5. Press Enter to save the setting
6. Press the Mode key until the Run indicator lights.A 3-digit Access
Code can be entered to avoid unauthorized personnel from changing
the set points, calibration, or configuration. A setting of 000 will
bypass the access code. The factory setting is 000.
If the freezer is configured for RS-485 communications, it will need to
have a unique identification address. This address is set through the
Configuration mode.
1. Press the Mode key until the Configuration indicator lights.
2. Press the right arrow until RS485ADDR is displayed in the message
center.
3. Press Enter. The message center will display 485 ADDR XX .
4. Press up/down arrow to select the appropriate address for the freezer
(1 - 24).
5. Press Enter to save.
This function, which is only available on freezers with the optional BUS
(back up system), allows the user to select which type of gas is injected into
the freezer chamber. The options are CO
2
and LN
2
.
1. Press the Mode key until the Configuration indicator lights.
2. Press the right arrow until BUS TYPE CO2 or BUS TYPE LN2 is
displayed in the message center.
3. Press up/down arrow to toggle between the two display selections.
4. Press Enter to save.
3-4 Isotemp ULT Chest Fisher Scientific
Section 3
Configuration
RS485 Address
Back Up System Type
Set Access Code
(continued)