Jumper settings - WAT12

WAT12 User Guide

Document code
M210309EN
Revision
B
Language
English (United States)
Product
WAT12
Document type
User guide

The loop current can be selected with the onboard jumper plugs. Several output ranges, such as 0 ... 20 mA, 4 ... 20 mA, 0 ... 10 mA, 2 ... 10 mA, 0 … 5 mA, and 1 … 5 mA, are available as user-configurable options, each with factory-adjusted zero and span levels. The voltage-mode signals are easily obtained by connecting a suitable resistor across the readout device's terminals. Signal full scale options are also available. For example, a directional scale of 540° (0-360-180°), which is convenient for analog panel meters or chart recorders, can be chosen to prevent the needle or pen from oscillating across the scale with northerly winds.

Figure 1. Location of jumpers
1
X4: Test and operation
2
X5: Output zero
3
X7: Scaling together with X6
4
X8: Output span
5
X6: Scaling together with X7

For example, you can set the wind speed output 1 ... 5 mA which corresponds to speed values 0 ... 51.2 m/s and to direction values 0 ... 540 degrees. This range does not change the scaling of 360 degrees corresponding to one full turn, rather it allows to calculate the average direction during northerly winds. These settings are carried out by the jumpers as shown in the following table.

Table 1. Jumper setting for 1 … 5 mA current loop
Jumper Description
X4 J5 ON Normal operation
X5 J1 ON 1 / 2 / 4 mA for 51.2 m/s
X6

J1 ON

J3 ON

0 ... 540°
X7 J5 ON
X7 J6 ON 0 ... 51.2 m/s
X8 ALL OFF 1 ... 5 mA

For examples for selecting scales and ranges, see the following figures.

Figure 2. Jumpers for setting 4 … 20 mA, 0° ... 360°, 0 ... 51.2 m/s
Figure 3. Jumpers for setting 1 ... 5 mA, 0° ... 360°, 0 ... 76.8 m/s
Figure 4. Jumpers for setting 0 ... 10 mA, 0° ... 540°, 0 ... 51.2 m/s