DeltaOHM HD31, Operating Manual

Page: 103 / 154

HD31
- 103 -
V1.6
13.6 C
ALIBRATION OF
VP473
MODULES
(
VOLTAGE
)
AND
IP472 (
CURRENT
)
The instrument allows defining a linear correspondence between the voltage and current val-
ues acquired by VP473 and IP472 modules and the values of a physical quantity (usually the
physical quantity detected by the transmitter whose analog output is connected to the mod-
ule). In this way, the values of the physical quantity detected by a transmitter can be directly
displayed and stored, besides the values of the voltage and current signals.
Fig. 13.6.1: example of association of a physical quantity to the acquired signal
Three options appear when you select a VP473 or IP472 module for calibration:
• 20 V SCALE (for VP473 module) or 24 mA SCALE (for IP472 module): cancels, if previ-
ously entered, the association between the voltage and current values acquired by the
modules and the values of a physical quantity. Selecting this option displays and stores
only the acquired voltage or current values.
• USER SCALE : defines a linear correspondence between the voltage or current values ac-
quired by the modules and the values of a physical quantity.
• USER LABEL : sets the measurement unit of the physical quantity corresponding to the
voltage and current values acquired by the modules.
Fig. 13.6.2: VP473 and IP472 module settings
Select the desired option using
S
and
T
, then press the F3 key ( OK command) to confirm.
If a message appears asking to confirm the operation, select YES ( F3 key) to continue (or
press ESC to cancel).
Physical quantity
(e.g. barometric pressure)
Input signal
(e.g. 4…20 mA)