Multirange Performance: Full Range Input, Direct Action - Emerson Fisher 846 Instruction Manual

Type 846 and Model 3311
Input Input
Range
Common Ranges
3–15 .5–30 3–27
(S,M) (M) (M)
n n n
4–20
n n n
4–12
n
12–20 J
n
4–8
n
8–12
12–16 J
16–20
J
10–50 Consult I/P Marketing
S=Standard Performance Unit
M=Multirange Performance Unit
n=Available in Direct or Reverse Action
D=Available in Direct Action Only
J=Available, but if the desired calibration cannot be achieved by adjusting the zero/span screws, unit may require Hi/Lo jumper to be moved. The jumper is located on the circuit board
assembly, and is usually in the Hi position. Disengaging the master module and moving the jumper to the Lo position will allow calibration to the desired range.
U=Special Build Required.
Assembly in Section 6 for an explanation of how to
engage the module final assembly.
5. Connect the air supply to the air supply port.
6. Connect a precision output indicator to the output
signal port.
7. Make sure that the output gauge port has an
output gauge or a threaded plug installed. A
threaded plug is provided for units shipped without
output gauges.
8. Remove the terminal compartment cover.
9. Connect the current source (or voltage source)
positive lead (+) to the terminal block positive (+)
and the current source (250-ohm resistor lead)
negative lead (–) to the terminal block negative (–).
Refer to figure 3-1.
CAUTION
Excessive current can damage the
transducer. Do not connect an input
current of more than 100 mA to the
transducer.
10. Apply a 4.0 mA (V
m
the zero screw to achieve a 0.2 bar (3.0 psi) output.
The output increases with clockwise rotation of the
zero screw.
2. Consult factory for calibration of multirange performance units with split range
input.
3–2
Table 3-1 Type 846 and Model 3311 I/P Rangeability Matrix
Output Pressure Range (psi) (Performance Code)
Misc.
6–30 5–25 0.5–6 .5–18
(M) (M) (S,M) (S,M)
n n
D
n n
D
J J D
n
n
J
J
= 1.0 V) signal, and adjust
Std. Split
3–9 9–15 .5–15
(S,M) (S,M) (S,M)
n n
D D
n n
D D
J D D J
n n
n n
n
J
J J
11. Apply a 20.0 mA (V
the span screw to achieve a 1.0 bar (15.0 psi)
output. The output increases with clockwise rotation
of the span screw.
12. Repeat Steps 10 and 11 to verify and complete
the calibration.
Multirange Performance: Full Range
(2)
Input, Direct Action
Use the following procedure with a multirange
performance unit to achieve the desired direct action
output span for a 4 to 20 mA input signal:
1. Perform steps 1 through 9 of the calibration
procedure for Standard Performance: Full Range
Input, Direct Action.
2. Apply a 4.0 mA (V
the zero screw to achieve the desired lower limit of
the output range. The lower limit must be between
0.03 and 0.6 bar (0.5 and 9.0 psi). The output
increases with clockwise rotation of the zero screw.
3. Apply a 20.0 mA (V
the span screw to achieve the desired upper limit of
the output range. The span must be at least 0.4 bar
(6.0 psi). The maximum upper limit is 2.0 bar (30.0
psi). The output increases with clockwise rotation of
the span screw.
4. Repeat steps 2 and 3 to verify and complete the
calibration.
Instruction Manual
High Range Splits
15–30 15–27 6–18 18–30
(M) (M) (S,M) (M)
n
U U U
n
U U U
n n n n
n
n
J
J
= 5.0 V) signal, and adjust
m
= 1.0 V) signal, and adjust
m
= 5.0 V) signal, and adjust
m
Form 5739
February 2002
5–15 15–25
(S,M) (M)
n
U
n
U
n n
n
n
J
J