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User Reference Manual - VI96 Display
1.15. 'SLOW' Mode
Special working mode for applicaons with low frequency
signals. Applies to ratemeter (‘rt.6’), ratemeter quadrature
(‘rtq.7’) and periodmeter (‘Prd.8’). The ‘SLOW’ mode allows
to measure slow frequencies down to 1 mHz (0,001 Hz) and is
funconal up to 200 Hz.
The ‘SLOW’ mode provides the fastest response me possible
for a given applicaon, calculang the frequency and the pe-
riod based on the me between consecuve impulses.
The ‘SLOW’ mode needs to dene the parameter ‘maximum
waing me’ to a value between 1 and 1000 seconds. If this
me expires without a single impulse being received, the rea-
ding jumps to ‘0’ (both for ratemeter and periodmeter modes).
The ‘GATE’ parameter is not used if ‘SLOW’ mode is acve.
In ‘ratemeter quadrature’ (‘rtq.7’) mode, the acvaon of the
‘SLOW’ mode calculates the frequency based on the me be-
tween consecuve impulses received on channel A, and cal-
culates the sense of turn (clockwise or counter-clockwise) by
comparing each impulse with the state of channel B. The ‘edge’
parameter is xed to a ‘1--1’. Typical applicaon for quadrature
frequency measure with two inducve sensors at low frequen-
cy.
1.16. 'FAST' Mode
Special working mode for counter applicaons with high fre-
quency signals, up to 250 KHz. Applies only to the counter
mode (‘cn.1’).
The acvaon of the ‘FAST’ mode congures the signal detec-
on by rising edge. The rst edge detected, either rising or fa-
lling edge, aer the instrument restart (power-up, or congu-
raon change) is used for internal inializaon and will not be
counted as impulse.
1.17. How to operate the menus
The instrument has two menus accessible to the user :
‘Conguraon menu’ (key SQ) (<)
‘Fast access’ menu (key UP) (5)
Conguraon menu
The ‘conguraon menu’ modies the conguraon parame-
ters to adapt the instrument to the applicaon needs. To access
the ‘conguraon menu’ press for 1 second the SQ (<) key.
This access can be blocked by acvang the ‘Password’ (‘PASS’)
funcon. While operang the ‘conguraon menu’, the alarm
status is ‘hold’ to the status they had before accessing the
menu, and the output and control modules remain in ‘error’
state. When leaving the ‘conguraon menu’, the instrument
applies a system reset, followed by a brief disconnecon of the
alarms and the output and control modules. Funconality is
then recovered.
For a detailed explanaon on the ‘conguraon menu’ see sec-
on 1.19, and for a full view of the ‘conguraon menu’ struc-
ture see secon 1.20.
‘Fast access’ menu
The ‘fast access’ menu is an operator congurable menu, pro-
viding fast and direct access to the most usual funcons of the
instrument with a single key pad stroke. Press key UP (5) to
access this menu.
See secon 1.19.12 for a list of funcons eligible for ‘fast ac-
cess’ in this instrument. The ‘Password’ (‘PASS’) funcon does
not block access to this menu. Accessing and modifying para-
meters in the ‘fast access’ menu does not interfere with the
normal funconality of the instrument, and it does not genera-
te any system reset when validang the changes.
Front key pad descripon
Key SQ (<) - press the SQ (<) key for 1 second to access the
‘conguraon menu’. Inside the menu, the SQ (<) key func-
ons as a ‘ENTER’ key. It selects and accesses the menu opon
currently displayed. At menus with numerical value entries, it
validates the number displayed.
Key UP (5) - the UP (5) key gives access to the ‘fast access’
menu. Inside the menus, it moves vercally through the die-
rent menu opons. At menus with numerical value entries, it
modies the digit selected by increasing its value to 0, 1, 2, 3,
4, 5, 6, 7, 8, 9.
Key LE (3) - inside the menus, the LE (3) key funcons as the
‘ESCAPE’ key. It leaves the selected menu, and eventually, will
leave the whole menu. When leaving the ‘conguraon menu’
with the LE (3) key, the changed parameters are acvated. At
menus with numerical value entries, the LE (3) key allows to
select the acve digit. To modify the value of the selected digit
use the UP (5) key.
Menu ‘rollback’
Aer 30 seconds without interacon from the operator, the ins-
trument will rollback and leave the ‘conguraon menu’ or the
‘fast access’ menu. All changes will be discarded.
