7-6 NetScan User’s Manual

Calibration Memory Write Enable/Disable

NetScan’s constants for chassis calibration and the calibration password are stored by NetScan in Non-Volatile RAM
(NV-RAM). The password is a safety feature used to prevent unauthorized personnel from entering calibration
mode and altering the calibration constants.
As a safeguard, the calibration password and chassis calibration constants are hardware protected. This protection is
enabled and disabled from the pushbutton located on the lower left of NetScan’s rear panel (see figure, next page).
The calibration button is disabled as the factory default setting. It should not be changed unless you want to change
the password or chassis calibration constants.
If it is necessary to change the calibration password (via the *K command) or to calibrate the chassis, this hardware
write protection can be disabled by pushing the calibration enable/disable button so it is “indented” (enabled). For
details on calibration, refer to Chapter 6, NetScan Calibration.
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Ensure the calibration enable/disable pushbutton is “not indented” during normal
NetScan operation. Otherwise, the calibration password and calibration constants may
be corrupted and normal operation may be disrupted.
Ethernet Interface Configuration
Chapter 1, Configuring and Starting NetScan, contains instructions for ethernet setup.
RS-232/422 Interface Configurations
The majority of NetScan users configure their unit for ethernet operation, as described in Chapter 1. RS-232/422
serial configuration may be used for non-network applications. RS-232 setup is recommended for use during
NetScan’s yearly calibration.
NetScan, Rear Panel