Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 3
Version: 3.0
I0000470
EQUIVALENT CALIBRATION VOLTAGE
(Continued)
Equivalent Calibration Voltage = Required Input Signal Amps x 250
Example:
1 VDC is the equivalent calibration voltage for a 4 milliamp input signal (1 = .004
x 250) or 5 VDC is the equivalent calibration voltage for a 20 milliamp input signal (5 = .020
x 250).
Step 1)
Trim Pot Presets Set all pots as follows to start (These are multi-turn trim pots with no hard stops;
they may make a slight clicking sound at either end of their range):
Turn the following pots full clockwise (25 turns): GAIN = gain of 1
FINE
OFFSET = 0 volts offset
REV = 0 volts reverse
Turn the following pot Full Counterclockwise (25 turns): ATTN = (no input signal attenuation)
Step 2) Jumper Shunt Presets
J1- NORMAL OR REVERSE ACTING:
Set in “N” position for direct acting output signal. (If you require a
reverse acting output signal, you will set this shunt in the “R” position in Step 7).
J2 - OFFSET:
Set in the “O” position for no offset to the output. (If you will require a “+” or “-” offset, you will
set this shunt in the appropriate position in Step 6).
J3 IN - INCOMING SIGNAL VOLTAGE OR CURRENT:
Set in “E” position for voltage input . (If you require a
current input, you will set this shunt in the “I” position AFTER you are finished with the calibration
procedure).
J3 OUT - OUTGOING SIGNAL VOLTAGE OR CURRENT:
Set in “E” position for voltage output (If you
require a current output, you will set this shunt in the “I” position AFTER you are finished with the
calibration procedure ).
Step 3) Wiring Connections
Make the following connections with the power OFF:
Connect a 24 volt AC or DC power supply to the ARM terminals “+24” and “-24”.
Connect the input signal common (-) and the (-) meter lead to the “-24” terminal. Connect (+) input signal
lead to the “IN” terminal.
Connect (+) meter lead to the “OUT” terminal.
Step 4) Power Up
Turn on the 24 volt power supply: the POWER indicator will light.
Step 5) Input/Output Signal Adjustments
In this step you will figure the desired voltage input signal span and the desired voltage output signal span
(see the section on Equivalent Calibration Voltage) and calibrate the ARM to these input and output signal
spans.
FIGURE 3:
JUMPER SHUNTS
J2
OFFSET
O - +
J2
OFFSET
O - +
J2
OFFSET
O - +
No Offset - No
Output signal
span shift
Positive Offset
shifts Output
signal span higher
Negative Offset
shifts Output
signal span lower
Figure C
Shunt as shown selects Desired Output Offset
J3
OUT
IN
I
E
J3
OUT
IN
I
E
Sample Settings for Input
& Output Signal
Current IN/OUT
Voltage IN/OUT
Figure B
J3 R N
J3 R N
Sunt as shown selects
Desired Output Action
Direct Acting
Output increases
as Input increases
Reverse Acting
Output decreases
as Input increases
Figure A
