Ranging Function; Figure 10 Direct Direction, Automatic Dual Range Transfer Hysteresis; Figure 11 Direct/Reverse Transfer Hysteresis - Honeywell MagneW 3000 Plus Application Manual

The range function allows the operator to define the basic operating
characteristics of the flowmeter. Table 3 explains the various function options
that are available.
Table 3—Summary of Range Function Options
Type Description
Single Range • Direct flow only with
one 4 to 20 range
Direct, Dual • Direct flow only with
Range, Auto two ranges
Selection
• Switching between
measuring ranges is
automatic
(Hysteresis is
illustrated in Figure
10.)
Direct, Dual • Direct flow only with
Range, External two ranges
Selection
• Switching between
ranges is done
externally
Direct/Reverse, • Direct and reverse
Dual Range, flow with two ranges
Auto Selection
• Switching between
measuring ranges is
automatic
(Hysteresis
illustrated in Figure
11)
Direct/Reverse, • Direct and reverse
Dual Range, flow with two ranges
External
• Switching between
Selection
ranges is done
externally
*Reverse setting is also possible.
Output
20 mA
4 mA
Adjustable by 0-20%
Figure 10—Direct Direction, Automatic
Dual Range Transfer Hysteresis
1/98

Ranging Function

Analog
Output
Forward:
4-20 mA dc
Reverse:
–20%
(0.8 mA)
Both 4 to
20 mA dc
Both 4 to
20 mA dc
Both 4 to
20 mA dc
Both 4 to
20 mA dc
Input
With respect to direct
23449
direction range,
adjustable by 0-20%
Figure 11—Direct/Reverse Transfer Hysteresis
MagneW 3000 PLUS Specification and Application Guide
Pulse Display
Proportional Positive
Not delivered Minus
Pulse weight for
both ranges is
the same
Pulse weight for
both ranges is
the same
Pulse weight is Minus sign
same appears
regardless of when flow is
flow direction in reverse
direction
Pulse weight is Minus sign
same appears
regardless of when flow is
flow direction in reverse
direction
20 mA Output
Reverse
direction
Contact
Input Output
No effect
No effect Factory setting
1st range: open*
2nd range:
closed*
Range select Factory setting
1st range: 1st range: open*
open 2nd range:
2nd range: closed*
closed contact outputs
(optional)
No effect Factory setting
direct: open*
reverse: closed*
Range select Factory setting
direct: open direct: open*
reverse: reverse: closed*
closed contact output
(optional)
Direct
direction
Input
With respect to reverse
direction range,
adjustable by 0-20% 23450
11