Precision Digital Corporation PD6800-0L1, Instruction Manual

Page: 19 / 24

PD6800-0L1 Explosion-Proof Loop-Powered Process Meter
Instruction Manual
19
Level Input Live Signal Calibration
(
LVL CAL
)
The meter can be calibrated using a current source
instead of scaling. This process will override previous-
ly programmed scaling of the level display.
The use of a calibrated signal source is strongly
recommended.
Internal Calibration (
ICAL
)
There is no need to recalibrate the meter when
first received from the factory.
The meter is
factory calibrated prior to shipment.
The calibration equipment is traceable to NIST
standards.
The internal calibration is the meter’s master
calibration that makes scaling the meter without a
signal source possible. Use of a calibrated signal
source is necessary to perform an internal calibration
of the meter. Check calibration of the meter at least
every 12 months. Incorrect calibration will affect the
ability of the meter to properly read, scale, and display
the input.
Press
MENU , navigate to
ADVANCE
and press ENTER
to access the Advanced Features Menu . Press the
UP arrow button to scroll to the
Internal Calibration
menu (
ICAL
) and press ENTER .
The meter displays
4.000
. Apply a 4.000 mA signal
and press ENTER . The display flashes for a moment
while the meter is accepting the signal. After the
signal is accepted, the meter displays
20.000
. Apply a
20.000 mA signal and press
ENTER
. The display
flashes for a moment while the meter is accepting the
signal.
Notes:
1. The signal source must have a full-scale accu-
racy of 0.002% or better between 4 and 20
mA in order to maintain the specified accuracy
of the meter.
2. Allow the meter to warm up for at least
15 minutes before performing the calibration
procedure.
Calibration Error Message (
SPN ERR
)
An error message indicates that the calibration
process was not successful. After the error message
is displayed, the meter will revert to the
INPUT 1
calibration menu. The error message might be caused
by inadvertently leaving the signal at the previous
level or not maintaining the minimum span. Press the
MENU button to cancel the current calibration process
if necessary.
Level Input Multipoint Linearization
(
MULTIPT
)
This menu enables multipoint linearization for scaling
and calibrating of the level display.
Setting
MULTIPT
to
ENABLE
allows the level display to
be scaled or calibrated using up to 32 points. See
Scaling the Meter (
SCaLe
) on page 14 and Level Input
Live Signal Calibration
(
LVL CAL
) on page
19
, to
include a Number of Points (
NO PTS
) parameter
before entering
Input 1
. The 32-point linearization is
used to linearize the display for non-linear signals.
PD6800L Displaying Height in Feet and Volume
(Using Multi-Point Linearization Feature) in Gallons
in a Round Horizontal Tank.
Information (
INFO
)
The
Information
menu shows the software
identification number and version number. To
determine the software version of a meter:
Go to the
Information menu (
INFO
) and press
ENTER
button.
Continue pressing
ENTER
to scroll through the
software release number and software version.
Following the information display, the meter will exit
the
Advanced Features
menu and return to run mode.