WIKA DI35 - Manual (Page 24)

6 Commissoning, operation
24 WIKA operating instructions digital indicator DI35-M
6.3.5 Analog output
The optional analogue output is used for the transduction of a measuring
value, supported by a standard signal of 0…10 V or 0/4…20 mA.
The analogue output is parameterised via the two program numbers PN20
“final value (fullscale)” and PN21 “initial value (offset)”. At the initial value, the
value is set at which the analogue output transmits the minimal value (0 V or
0/4 mA), and with "Full scale", the value at which the output transmits its
maximum (10 V or 20 mA).
By this means it is possible to re-scale the input signal of a transducer or
even to convert it into another standard signal. The analogue output can be
de-activated via the actuate value PN22, as well as set on the active
measuring value, MIN value, MAX value, HOLD value, sliding average value
or totalizator value.
The analogue output is updated within the cycle of the measuring time. At a
high measuring rate, smaller cycle fluctuations of some milli-seconds are
possible.
6.3.6 Digital input / multi-function key
In combination with the digital input (via terminal) and/or the multi-function
key at the front, functions like e.g. HOLD, TARA, MIN/MAX permanent or
totalizator function, can be actuated respectively set back. The digital input is
available in combination with the option sensor supply or via an external DC
24 V-signal. The multi-function key at the front of the device can be activated
by keypress.
HOLD function
The HOLD function is a static signal and will be activated via the digital input
or the multi-function key. With activated HOLD the lastly given measuring
value remains and is by deactivation permanently overwritten by the
measuring value recording. With this function a test state can be recorded
beyond a specific period, so that this device can be used for control in run
production, too.
Information
HOLD value gets lost with re-start!