Simultaneous Current and Voltage Output Operation
The terminal block is removable, and each of the terminals are labeled underneath the
terminal block on the circuit board. The voltage output and the power supply must have
separate wire leads that are only joined at terminal 2 of the transmitter, as shown in
Figure 3. Additional error may occur for the voltage output if a single wire is used or if
the wires are joined at the power supply or receiver. The connections to the transmitter
are made to terminals 1, 2, 3 and 4 (PWR, GND, IOUT, and VOUT respectively) on
the terminal block as shown in Figure 4, which reflects both the 4-20 mA and 0-5/10
VDC outputs in the same circuit. Details of each output are detailed in their electrical
connection sections.
ANALOG DIP SWITCH SETTINGS
The analog output DIP switches (SW1) are located above the terminal blocks on the
left are as shown in Figure 4. A small screw driver or pen can be used to change the
position of the switches as required.
Factory Default Settings (DIP SW1 – All Switches ON)
Range = Highest Range Setting (400 FPM)
Units = Imperial (FPM)
Voltage Output Range = 0-10 VDC
Direct / Reverse Output Action = Direct
Setting the Air Velocity Range
The range of the instrument is selected by using DIP switches 1 and 2 on SW1. Table
1 shows the maximum full scale value for the selected range and unit. Refer to Setting
the Engineering Units section for information on setting the unit.
Setting the Engineering Units
The Series AVLV can be configured to indicate velocity in imperial (FPM, CFM) or
metric (m/s, m
3
/h) units using DIP switches 4 and 5 on SW1, and Table 2 shows the
values. The units will be displayed on the optional LCD display if connected.
The default operating mode is velocity, but changes can be made, such as flow
mode, via the menu system while an optional display or remote display accessory is
connected. Please refer to Appendix VI for a full menu flow chart.
Setting the Output Voltage Range
Voltage Output can be either 0-5 VDC or 0-10 VDC depending on the position of DIP
Switch 6 ON SW1.
• When the switch is in the ON position, the output will be 0-10 VDC.
• When the switch is in the OFF position, the output will be 0-5 VDC.
Setting the Input / Output Action
The output will either follow the process directly (DIRECT) or inverted (REVERSED)
based on the position of DIP Switch 7 on SW1.
• When the switch is in the ON position, the output directly follows the input (i.e. output
increases as the input increases).
• When the switch is in the OFF position, the output acts in reverse of the input (i.e.
output decreases as the input increases).
Table 1: DIP switch SW1 settings for full scale range
Table 2: DIP switch SW1 settings for units
Figure 4: Analog dip switches
Figure 3: Simultaneous current and voltage output wiring
SW1
POWER
VOLTAGE
RECEIVER
CURRENT
RECEIVER
SPAN
ZERO
PWR
GN
D
IOUT
VOUT
D1(+
)
D0(-)
CO
M
DIR
10V
UNITS
RANGE
5V
REV
KEY
SW1
SW1
SPAN
ZERO
PWR
GN
D
IOUT
VOUT
D1(+
)
D0(-)
CO
M
DIP Switch SW1 Units
4
5
Velocity Mode
Air Flow Mode
ON
ON
OFF
OFF
ON
OFF
ON
OFF
FPM
m/s
m/s
m/s
CFM
m
3
/h
m
3
/h
m
3
/h
DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.
PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL
RESULT.
CAUTION
All power should be turned off to the transmitter before adjusting
the DIP switch settings to avoid electrical shock.
DIP Switch SW1 Full Scale Range
1
2
Imperial (FPM)
Metric (m/s)
ON
ON
OFF
OFF
ON
OFF
ON
OFF
400
300
200
100
2
1.5
1
0.5
CAUTION
