Converter 4 - 8
PN25080
TRIO-WIRL INSTRUCTION MANUAL
4.6.2 Detailed Specifications
KEYPAD & DISPLAY
FLOW RANGES:
The flow range end value can be continuously set between
0.15 x Q
vmax
and Q
vmax
.
PARAMETER SETTING:
Data is entered using the 3 pushbuttons or using the magnetic
stick when the housing is closed.
The data is entered in a clear text dialog with the display or
though digital communication utilizing HART-Protocol, Profibus
PA or Fieldbus Foundation (in preparation).
DATA PROTECTION:
The totalizer values and the meter location specific parameters
are stored for a period of up to 10 years in an EEPROM when
the power is turned off or during a power interruption.
FUNCTION TESTS:
The individual internal subassemblies of the converter can be
checked using the built in function tests in the software. Simu-
lated current output values can be entered during start-up (man-
ual process control). The contact output can also be manually
actuated for testing purposes.
DAMPING:
Can be set between 0.5 and 100 sec., equivalent to 5T @
Q
VMIN
Q
VMIN
(LOW FLOW CUTOFF):
Can be set between 0 and 10% of Q
vmax
(maximum actual vol-
ume flowrate for the flowmeter size).
SUPPLY POWER:
Standard:
14 to 46 V DC
Ex-Design:
14 to 28 V DC
Ripple:
max. 5 % or ± 1.5 V
pp
POWER:
< 1 W
PROTECTION CLASS:
NEMA 4x / IP 67
OUTPUT SIGNALS:
Current output for flowrate signal (volume or mass):
4-20 mA, load
≤
750
Ω
CONTACT OUTPUT:
The following functions for the contact output can be selected in
the software:
-Limit alarm, flowrate:
Min, Max or Min-Max
-Limit alarm, temperature:Min, Max or Min-Max
-System alarm
-Pulse output * :
fmax: 100 Hz;
Pulse width: 1 - 256 ms
* The pulse output is intended to interface with a Totalizer. The
interval between any two pulses may not represent the instanta-
neous flow rate.
CONTACT CONFIGURATION:
Standard and Ex “d”:
Optocoupler U
H
I
L
= 2-15 mA
-Ex “ib”:
Current-limited-Contact
(Refer to Figure
5-14
)
DISPLAY:
High contrast LC-Display, 2 x 8 characters. For display of the
instantaneous flowrate, totalized flow or fluid temperature val-
ues (option).
Using the multiplex function it is possible to alternately display
two values (e.g. flowrate and totalizer values) alternately.
+/- 90° Rota-
3 Buttons for
direct operation
Magnet Stick-
operation
Magnet Stick-
operation
FIGURE 4-7 Converter Keypad and Display
