Phonetics Skymetry WTU-14, Руководство пользователя

Страница: 45 / 114

Configuring the Input Type
The input Type can be temperature 10K(deg F), temperature 10K
(deg C), or 4–20mA. Select the type to match your sensor.
Note
: Be sure to put the input jumper in the correct
position.
Input Enable/Disable
A channel must be Enabled for the input to be read by the Skymetry
WTU-14. When a channel is enabled its status will appear on the
status screen and on the web page. Select the type of analog input
from the pulldown menu.
Setting Table Limits
When 4–20mA is selected, you can enter table low and high values
to correlate the 4mA and 20mA signals to actual values for your
application. For example, suppose you’re using a 4–20mA transduc-
er to measure the depth of water in a 15 foot well. Simply enter a
Table Low value of 0 and a Table High value of 15 and the WTU-14
will scale the input to read between 0 and 15 feet.
Programmable range
Table Low/High: -16,334 to 16,333
Default settings
Table Low value: 0
Table High value: 100
Calibration
To compensate for minor variances in sensor accuracy, an offset
may be programmed for each analog input. For example, if the
above input were sensing temperature and was reading 3 degrees too
low, then the calibration would be set at 3 as shown above, to obtain
an accurate reading. Only Analog-type inputs can be calibrated.
Alarm Enable/Disable
The Enable Alarms checkbox activates the alarm processing func-
tions for the selected channel. When the input exceeds the the pro-
grammed low or high alarm limits and exceeds the programmed
recognition time the notification process begins.
Chapter 4: Input Programming
45