50-613 Kotron
®
Series 82 CE RF Level Transmitter
13
7. If 20 mA cannot be reached, individually close Span
Coarse DIP switches (in sequence), #1, #2, and #3, until
the loop current is close to (and not less than), 20 mA.
(ONLY ONE SWITCH POSITION SHOULD BE
CLOSED AT A TIME—THE OTHER TWO
POSITIONS MUST REMAIN OPEN).
8. Turn the Span Fine potentiometer counterclockwise until
the loop current is exactly 20.00 mA. If 20 mA cannot be
reached, repeat Step 6.
Calibration is now complete.
1.7.2 Calibration Procedure B
1. Move the media level in the vessel to the lowest level you
can set.
2. To determine the correct output level at this point, use the
following formula:
3. Turn the Zero Coarse potentiometer counterclockwise
until the loop output is between L1mA and
L1mA + 0.5 mA.
4. If the loop current output cannot be decreased to at least
L1mA + 0.5 mA, turn the Zero Coarse potentiometer
fully clockwise, close Zero Coarse DIP switch positions #2
and #3 sequentially (ONLY ONE SWITCH POSITION
SHOULD BE CLOSED AT A TIME—THE OTHER
TWO POSITIONS MUST REMAIN OPEN). Repeat
Step 3. See Figure 10.
5. Turn potentiometer Zero Fine counterclockwise until the
loop output reads exactly L1mA.
6. Move the media level in the vessel to the highest level you
can set.
7. To determine the correct output level at this point, use the
following formula:
8. Turn the Span Fine potentiometer counterclockwise until
the loop current reaches the desired value calculated
(L2mA) in Step 7.
9. If the desired value cannot be obtained, individually close
the Span Coarse DIP switches #1, #2, and #3, until the
loop current is as close to (and not less than), L2mA.
(ONLY ONE SWITCH POSITION SHOULD BE
CLOSED AT A TIME—THE OTHER TWO POSI-
TIONS MUST REMAIN OPEN).
10. Turn the Span Fine potentiometer counterclockwise until
the loop current is exactly L2mA.
Calibration is now complete.
L
2
mA
= (
(
L
2 -
L
0)
x 16) + 4
(
L
3 -
L
0)
L
1
mA
= (
(
L
1 -
L
0)
x 16) + 4
(
L
3 -
L
0)
