Note: This example uses a linear approximation for the type K thermocouple. Over the
delta T range of -8 to +64 degrees C, the error in this approximation is less than 0.3
degrees C. The linear approximation (slope) was calculated from two points. In this case
0 degrees (0 mV) and 50 degrees (2.023 mV).
Slope = (50 degrees / 2.023 mV) * (1000 mV / V) = 24716 degrees per volt
The resultant temperature is relative to the temperature of the terminal strip to which the
thermocouple is connected. If the terminal strip is at 20C and the thermocouple is at 30C,
Monitor will read the difference (10C) in the thermocouple. In order to have an absolute
temperature reading you’ll need to measure the temperature of the terminal strip and then
add to it the thermocouple temperature.
Tipping Bucket
This section describes how to physically connect the sensor and how to configure the
setup in MONITOR.
The sensor used in this example is a standard switch closure tipping bucket. This sensor
closes a switch for each tip of the bucket and has two leads, polarity doesn’t matter.
To wire it up, connect like so (NOTE: The lead numbers are not marked with numbers,
this is just a reference.)
Tipping Bucket
MONITOR Connections
Lead 1
Terminal block 6
Lead 2
Terminal block 7
Tipping Bucket Setup
(Total Rain)
Value
Active
On
Label
RAIN
Meas Type
Precip Accumulation
Meas Interval
00:15:00
Averaging Time
00:00:00
Slope
.01 (for tenth inch tipping bucket)
Offset 0
Use Equation
Off
This will provide the accumulated rain at this station, with a 15 minute interval. If Daily.
Hourly, etc. rain is needed, then the setup would look like this (wiring is the same).
Tipping Bucket Setup (Rain for
period of time)
Value
Active
On
35
