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9. HOLD FUNCTION
The AD-4532B has four hold modes; sample hold, peak hold, bottom hold and bipolar peak hold. A
hold mode can be selected in function mode
f-14
.
9-1 Basic Operation
9-1-1 Starting a hold mode
Four methods to start a hold mode are available.
Using the HOLD key
Pressing the HOLD key will start the hold function and display the held value.
Pressing the HOLD key again will stop the hold function and display the measured value.
Using the external HOLD input terminal on the rear panel
Turning ON (contact input) the HOLD input terminal will start the hold function.
Turning OFF the HOLD input terminal will stop the hold function.
Using Modbus
Activating the Modbus coil address 1 will start the hold function.
Activating the Modbus coil address 2 will stop the hold function.
Using the optional RS-232C command
The RS-232C hold ON command “H
CR LF
” will start the hold function.
The RS-232C hold OFF command “C
CR LF
” will stop the hold function.
HOLD indicator
When the hold function is started, the HOLD indicator turns on to indicate that the hold function is
activated. In the hold modes other than the sample hold mode, the PEAK indicator turns on when
the peak value (or bottom value) is reached.
Priority
The priority of the hold input using the external HOLD input terminal is higher than the other
methods.
Holding time after releasing hold
The AD-4532B has a function to hold the value for a certain period of time after the hold function is
stopped. To set the holding time, use function mode
f-15
.
During the holding time, the HOLD indicator blinks.
When the set holding time is elapsed, the display switches to the currently measured value.
When starting the hold function during the holding time, the indicator holds the new value.
Using the holding time
Use this function to confirm the held value.
While the displayed value is held, the indicator continues other operation using the
latest measured value.
