Vertu Series VPM3000 Process Meters & Temperature Transmitters
Instruction Manual
20
If RTD is selected, the display shows
A385
or
A392
.
Select the coefficient to match the RTD sensor, either
0.00385 (
A385,
European curve) or 0.00392 (
A392,
American curve). The display then shows the decimal
point menu,
DEc.P
. Select the decimal point resolution
as shown on page
If TC is selected, scroll through the thermocouple
types and select the type matching the TC sensor.
The input signal must be connected to the appropriate
input terminals and the RTD/TC selector switch must
be set, see
on page
For thermocouple inputs, allow at least 30
minutes warm-up time for meter to reach
specified accuracy.
Setting the Decimal Point (
dc.pt
)
The decimal point for process inputs may be set with up
to three decimal places or with no decimal point at all.
The decimal point for RTD inputs may be set with
1 decimal place or none.
The decimal point for thermocouple inputs is fixed per
input selection.
Pressing the
Up
arrow moves the decimal point one
place to the right until no decimal point is displayed,
it then moves to the leftmost position.
Setting the Temperature Scale
(
F C
)
Meters with a thermocouple or RTD input can be set
to display temperature in degrees Fahrenheit or
Celsius.
Press
Up
arrow to change selection.
Press
Enter/Ack
to accept.
Programming the Meter (
prog
)
The meter may either be scaled (
ScAL
) without
applying an input or calibrated (
Cal
) by applying an
input. The meter comes factory calibrated to NIST
standards, so for initial setup, it is recommended to
use the (
ScAL
) function.
The Program menu contains the Scale (
ScAL
) and the
Calibrate (
Cal
) menus.
Process inputs may be scaled or calibrated to any
display within the range of the meter.
Scaling the Meter (
scal
)
The process inputs (4-20 mA and
±
10 VDC) can be
scaled to display the process in engineering units.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
For instructions on how to program numeric
values see
Note:
The
Scale
menu is not available for
temperature inputs.
Error Message (
Err
)
An error message indicates that the calibration or
scaling process was not successful.
After the error message is displayed, the meter
reverts to input 1, allowing the appropriate input
signals to be applied.
The error message might be caused by any of the
following conditions:
1. Input signal is not connected to the proper
terminals or it is connected backwards.
2. Wrong signal selection in
Setup
menu.
3. Minimum input span requirements not
maintained.
4. Input 1 signal inadvertently applied to calibrate
input 2.
