Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Version: 3.0
I0000470
ARM CALIBRATION WORK SHEET
: Fill in and circle answers.
1. Input: minimum______maximum______ mA or VDC, Output: minimum______maximum______ mA or
VDC
2. Is the input VDC? Yes/No. Is the output VDC? Yes/No
a) If yes to both, set jumper J3 (IN/OUT) to E and skip to step 5.
b) If no to both, set jumper J3 (IN/OUT) to I and skip to step 5.
c) If yes to only one, continue to step 3.
3. Is current the input signal? If no, skip to step 4. If yes, perform the following:
a) Set J3 (IN) to I and (OUT) to E.
b) Multiply input minimum by 250 and enter value in “Input minimum” in step 5a.
c) Multipy input maximum by 250 and enter value in “Input maximum” in step 5a.
Example : minimum=4mA = .004 x 250 = 1 VDC and maximum=20mA = .020 x 250 = 5 VDC.
4. Is voltage the input signal. If no, skip to step 5. If yes,
a) Set J3 (IN/OUT) to E. Output jumper will be changed to I in later steps.
b) Multiply output minimum by 250 and enter value in “Output minimum” in step 5b,
c) Multiply maximum by 250 and enter value in “Output maximum” in step 5b.
Example : minimum 4mA = .004 x 250 = 1 VDC and maximum 20mA = .020 x 250 = 5 VDC.
5. Enter mA, VDC or equivalent values below. Note: Do not mix voltage and current.
a) Input minimum______ Input maximum______ maximum-minimum = Input span______
b) Output minimum______ Output maximum______ maximum-minimum = Output span______
6. Preset trimpots: 25 Turns until it clicks.
25 Turns Clockwise - Gain, Fine, Offset and Reverse
25 Turns Counter clockwise – Attenuation
7. Make all connections including signal generator and multimeter. Apply power (24 VAC or VDC).
8. Set jumpers J2 to 0 and J1 to N
9. First test: input a 50% signal. Is the input equal to or close to the output?
If yes, proceed to step 10.
If no, return to step 7.
Note: Min, max and span values are found in step 5.
10. Supply the “input span” signal or equivalent to the input. (Refer to step 5).
a) If the “input span” is less than “output span”, turn the gain or fine trim pot until the output is equal
to the “output span” signal.
b) If the “input span” is greater than “output span”, turn the attenuation trim pot until the
output is equal to the “output span” signal.
11. Setting the offset jumper:
a) If the “input minimum” is greater than “output minimum” Set J2 to (-). Skip to 12.
b) If the “input minimum” is less than “output minimum” Set J2 to (+). Skip to 12.
c) If the “input minimum” is equal to “output min” Leave J2 alone and skip to step 12.
12. Supply the “input minimum” signal or equivalent to the input. Adjust the offset trim pot until the output reads
the same as “output minimum”.
13. Is signal reverse acting? If not skip to step 14. If yes, refer to following:
a) Set J1 to R.
b) Supply “input minimum”, or equivalent, and adjust the Rev trim pot until reading is equal to output
maximum.
14. If the output is current. Set J3 (out) to I and reset meter to current. (Vout / 250 = mA).
15. Check the low, mid-scale and high signal points to check output for proper calibration. Fine calibration
adjustments may now be made.
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