Precision Digital Corporation ProtEX-MAX PD8-6000, Instruction Manual

Page: 55 / 64

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
55
Function Keys & Digital I/O Available Settings
Display Description
Ln1 HL
Display maximum & minimum display
values on line 1
Ln2 Hi
Display maximum display value on line 2
Ln2 Lo
Display minimum display value on line 2
Ln2 HL
Display maximum & minimum display
values on line 2
F On 1
* Force relay 1 (*through 4) into the on
state. This function is used in
conjunction with a digital input to
achieve interlock functionality. See
Setting Up the Interlock Relay (Force
On) Feature
on page 47 for details.
Contrl
Directly access the control menu
disabl
Disable the selected function key or
digital I/O
AcH
Acknowledge all active relays that are in
a manual operation mode such as auto-
manual or latching
Reset
Directly access the reset menu
nmenu
Mimic the menu button functionality
(digital inputs only)
rigHt
Mimic the right arrow/F1 button
functionality (digital inputs only)
up
Mimic the up arrow/F2 button
functionality (digital inputs only)
Enter
Mimic the enter/F3 button functionality
(digital inputs only)
Alnm 1
* Provide indication when alarm 1
(*through 4) has been triggered (digital
outputs only)
Tare (
tare
)
The tare function zero’s out the display. In the case of
scale weight, tare is used to eliminate container
weight and provide net weight readings. There are
two tare functions; Capture Tare and Reset Tare.
When the capture tare function is used, the display
reading is offset by the displayed amount to make the
displayed value zero. This modified display value is
the net value. The originally displayed value without
the tare offset is the gross value. Both may be chosen
as a display option.
Reset tare removes the display offset of the net value,
and the gross and net values become the same until
a new capture tare is entered.
Internal Source Calibration (
ICAL
)
The meter is factory calibrated prior to shipment
for milliamps and volts with calibration equipment
that is certified to NIST standards.
The use of calibrated signal sources is necessary to
calibrate the internal source of the meter. The
meter’s
internal source is what allows the user to scale the
meter without applying a signal.
Check calibration of the meter at least every
12 months. Each input must be recalibrated
separately.
Notes:
1. If meter is in operation and it is intended to accept
only one input type (e.g. 4-20 mA), recalibration of
other input is not necessary.
2. Allow the meter to warm up for at least 15 minutes
before performing the internal source calibration
procedure.
The
Internal calibration menu is part of the Advanced
Features menu.
1. Press and hold the Menu button for three
seconds to access the advanced features of the
meter.
2. Press the Up arrow button to scroll to the Internal
calibration menu (
ICAL
) and press Enter.
3. The meter displays either current calibration
(
C CAL
) or voltage calibration (
V CAL
), according
to the input setup. Press Enter to start the
calibration process.
Example of Internal Calibration for current
input:
4. The meter displays low input current message
(
C lo
). Apply the low input signal and press
Enter. The display flashes for a moment while the
meter is accepting the low input signal.
5. After the display stops flashing, a number is
displayed with the leftmost digit brighter than the
rest. The bright digit is the active digit that can be
changed by pressing the Up
arrow button. Press
the Right arrow button to move to the next digit.
6. Set the display value to correspond to the input
signal being calibrated, typically
4.000 mA.
7. The display moves to the high input calibration
(
C Hi
). Apply the high input signal and press
Enter.
8. Set the display for the high input calibration, in
the same way as it was set for the low input
calibration, typically 20.000 mA.