Halytech
hydroSpider2 User’s Manual v1.23
Page 43
5.6.4
Change Offset Only
Applies to
: Analogue (Voltage), Analogue (4-20mA), Intelligent Sensors
Change offset only is used when the scaler has already been set to the correct value, but the sensor
is constantly off by a fixed amount.
This page also shows the current calibrated value, which can be updated at any time by clicking the
Update
button.
For example
: take the scenario where a pressure sensor is being used to determine the level of
water in a tank. This pressure sensor has been calibrated at the office, but when it is installed into
the tank on site, a mounting bracket places it 0.25m off the tank floor. This means that the reading
will constantly be 0.25m less than the actual water level. This can be easily remedied by performing
a
change offset
calibration on this.
5.6.5
Change Desired Value (counter)
Applies to
: Counter, Event
Change Desired Value is used when the count on a counter or event has to be updated to make the
hydrospider2
’s reading match the current reading on the sensor, which may become necessary if
some pulses have been missed – perhaps because the sensor was temporarily disconnected or has
been reset.
Simply enter the sensor’s reading as the desired value and the hydroSpider will start counting from
there.
This page also shows the current calibrated value, which can be updated at any time by clicking the
Update
button.
