PROTEK 506
Function keys 
Function keys of the multimeter
PROTEK 506
i) TIME
This is used tor fix the time function. When this
key is pushed down, the display 0 hours 00 minutes 00
seconds appears in the secondary LCD. Pushing
again the TIME function is cancelled and the normal
model restored. Up and down is used to start time
counting and the buzzer will sound indicating the end
of time counting.
ii) FUNCTION
This key is used for selecting the alternating function
(when position of the rotary selector switch remains
unchanged). Position #1 corresponds to the default status
(see table).
No
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Rotary Switch
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#1
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#2
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#3
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1
|
V/logic
|
|
|
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2
|
MV
|
DCmV
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ACmV
|
|
3
|
Sig Out
|
2048Hz
|
4096Hz
|
8192Hz
|
4
|
ΜA
|
DCμA
|
ACμA
|
|
5
|
MA
|
DCmA
|
ACmA
|
|
6
|
20A
|
DC20A
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AC20A
|
|
7
|
/ Ω
|
Ω
|
|
|
8
|
/ 
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|
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iii) RANGE/SCALE
This key is used to change from automatic to manual
scale mode. The default conditions correspond to the
automatic scale mode.
iv) HOLD
This key has two functions: one is Holding and another
one is the upward or increase function. The upward function
is used for time and memory applications.
The HOLD
function is used to fix the measured value at the time
the key is pressed.
With the key pressed, hold pointer turns on and the
secondary counter presents the actual value.
v) DISPLAY LIGHT
This key illuminates the display. A first push turns
on the light and a second one turns it off.
vi) MENU FUCTIONS
Push once to enter the menu mode. Pushing longer
than 1 second cancels the menu mode. When pushing this
key, all the menu indicators MIN/MAX/AVG/REL/MEM/KEEP-ON/RS232C appear
immediately and only the selected indicator blinks.
MAX/MIN/AVG -
These are functions to get the maximum, minimum and
average values. The relative mode (REL)
gives percentage deviation (D) of the data between
the background displayed value and the reference value
settled with the HOLD key.
MEM –
Allows to memorize ten measurements recyclable by using
the up (5) and down (6)
keys.
KEEP
ON - Allows keeping on the device,
disabling auto power off.
RS232 -
This function mode is independent of other modes and
functions (explanation further down).
vii) ON/OFF
General power switch- the life time of battery is
about 2 months of continuous use.
Prepared by: Filomena Camões, Manuela
Rocha, University of Lisbon, Portugal
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