5.4 Functional Specifications
158
Key-lock (KEY LOCK)
Backup
System Reset
Instrument protection mode
Functions Disables key input in the measurement state, except for the KEY LOCK key.
Operation Pressing the KEY LOCK key enables the key lock function (causing the KEY LOCK
lamp to light up).
Constraints The key lock state will be canceled when the instrument is placed in the remote state
(and the REMOTE lamp will light up) by communications.
Backup Yes (The key lock state will continue in effect when the instrument starts up.)
Default state Key-lock: OFF
Functions Backs up settings and integration data if the instrument is turned off and if a power out-
age occurs.
Functions Initializes the instrument’s settings.
Operation The system will be reset if the DATA RESET key is pressed after the instrument is
turned on.
Constraints Communications-related settings (communications speed, address, and LAN-related
settings) are not initialized.
Functions Forcibly changes the range to the 200 mA range to prevent the instrument’s current in-
put circuitry from producing heat if current of greater than or equal to ±612 mA peak is
inputted continuously for 10 or more seconds when using a range from 1 mA to 100 mA
with fixed range.
When using a range from the 200 mA range to the 20 A range, the user is prevented
from switching to a range from the 1 mA to the 100 mA range while inputting a current
that is greater than or equal to ±612 mA peak.
Operation The CURRENT ● lamp will flash.
Integration will be forcibly stopped (causing the RUN lamp to flash), and it will not be
possible to resume integration operation.
Other functions can be used.
If the 200 mA range has been disabled using the range select function, the range will
be switched to an enabled range greater than the 200 mA range.
Cancellation method Instrument protection mode can be canceled as described by performing any of the fol-
lowing actions, causing the CURRENT
● lamp to turn off:
1. Pressing one of the current range keys
2. If integration has stopped, resetting integrated values
3. If integration has been reset, pressing the EXIT key
4. Performing a system reset
5. Performing zero-adjustment
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