Burkert Type 8056 - Manual (Page 29)

SE56
29
FUNCTIONS FOR INPUTS 2-3
OFF: DISABLE
BATCH: START/STOP BATCH
BM SELECT: STATIC SELECTION OF FORMULA
VALV. OPEN: OPEN VALVE COMMAND
STAND-BY: STAND-BY COMMAND (see function 10.4)
(POS. 3.5) Automatic scale change enable [Autorange=ON/OFF]
Enables the automatic change of scale. The meter may have two different working ranges in order to
suit to the variable process conditions. In order to get the best results out of this function it is
important range N.2 (Fs2) if enabled is bigger than N.1 (Fs1). When the flow rate increases and
reaches the 100% of the full scale 1, then the meter automatically switches to scale 2. When the flow
rate decreases again reaching a value on scale 2 equal to the 90% of full scale N.1, then the active
scale is 1 again. Allowed values for this parameter: ON/OFF. Note: the autorange does not allow
using the range change external command (pos. 5.7).
MENU 4 - ALARMS
(POS. 4.6) Current output value in case of failure [mA v.fault =% XXX]
Setting of the value the 4-20mA current output has to be in one of the following cases:
empty pipe; coils interrupted; ADC error
The allowed range is from 0 to 120% of the 0-20 mA scale, 120% corresponds to 24mA and does not
depend on the selected range (0-20/4-20mA). The NAMUR NE43 recommendation asks for a alarms
signalling value for the current output lower than 3.6mA (<18%) or bigger than 21mA (>105%). It
would then be preferable to set the value of this function at the 10%, so that the current value in
case of the a.m. cases would be 2mA, allowing the following diagnostics:
1. current < 2 mA - 5%: line interrupted, power supply failure or faulty transmitter;
2. 2mA -5%
d current d 2mA + 5%: hardware alarm;
3. 4mA d current d 20mA: normal working range;
4. 20mA < current d 22mA: out of range, measure above 100% f.s.
N.B.: To set this parameter to zero corresponds to disable the alarm
(POS. 4.7) Batch safety timer
[Timeout=s XX.X]
With this function is possible to set a maximum time for the batch; over this time will be generate an
alarm.
This function is useful when you need control one or both of the followings condition:
‰ batch valve open and flow rate is zero
‰ batch valve closed and flow rate different to zero
When this alarm is activated, they are aborted the batch operation and the power supply of the valve.
The values of function are from 0 to 25.5 seconds and is active only if one or more of the batch
functions are enable.
MENU 5 - INPUTS
(POS. 5.1-2) Modify/reset totalizer enable [T1-2 reset=ON/OFF]
When one of this function is enabled, the related totalizer may be reset through the on/off input.
(POS. 5.5) “Block measures” command block measures enable
[Meas. lock=ON/OFF]
When this function is active (ON), applying a voltage on the on input terminals, the measurement is
stopped, the meter will display zero flow.
(POS. 5.6) Autozero calibration external command enable
[Calibration=ON/OFF]
When this function is active, applying a voltage on the on/off input terminals the meter performs a
autozero calibration cycle. ATTENTION: if the voltage pulse is less 1 sec., the meter performs a
calibration cycle for compensate possible thermal drifts. If the voltage pulse is more than 1 sec, the
meter performs a zero calibration of measure. This function enables/disables the automatic zero
calibration system. To perform the sensor it is absolutely necessary the sensor is full of liquid and that
the liquid is perfectly staying still. Even very small movement of the liquid may affect the result of this
function, and, consequently, the accuracy of the system.
(POS. 5.8-9) Functions assigned to input 2-3
[INP.2-3=XXXXXX]
Choice of the function to associate the input 2 The functions are listed in the table below.