Power Switch; Power-Up Settings - TTI 1604 Manual De Instrucciones

Switching On

Power Switch

The multimeter is switched on and off with alternate presses of the Operate key. This key only
switches the DC power to the measurement circuits; it does not switch the AC power which
means that the isolated RS232 circuit continues to be powered. Disconnect from the AC supply
by unplugging the mains cord from the back of the instrument or by switching off at the AC supply
outlet; make sure that the means of disconnection is readily accessible. Disconnect from the AC
supply when not in use.

Power-up Settings

At power-up using the Operate key the default action is to restore power-down settings; the
power-down settings are not retained if AC power is removed.
To restore the default settings (Volts, DC, Autorange) press SHIFT then Reset.
Turning the meter on at the AC supply whilst any key is held down initiates a buzzer and display
test (all segments and annunciators should be lit); when the key is released the revision of the
installed firmware is shown in the display as x.x. Pressing the Operate key switches on the meter
as normal.
Buzzer
A short beep is sounded whenever an invalid key is pressed, e.g. pressing Hz when an AC range
is not selected; such keystrokes are not accepted. The buzzer is also used to indicate a
resistance <10Ω in Continuity mode.
Keyboard
Selection of the primary function is made directly by pressing the appropriate keys e.g. V and DC
for DC Volts; the primary function is showing beside the key. The meter is switched between
autoranging and manual with alternate presses of the Auto/Man key; alternatively using the
arrowed up and down keys changes the range and sets manual ranging.
The further functions (Null, Hold, Min-Max etc.) are all selected by pressing SHIFT followed by
the appropriate key; the shifted function is shown in blue above the key. When SHIFT is pressed
the annunciators for all the shifted functions are lit; when the function is selected with the
appropriate key only the associated annunciator remains lit.
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