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Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • [email protected] • www.piecal.com
Operating Instructions
Calibrate a 2-Wire RTD Transmitter by sourcing the input while monitoring the output.
Move the power switch
w
to SOURCE and Double click the
e
DIAL KNOB and the MAIN menu for
the function in use will appear for 15 seconds:
Turn the
e
DIAL KNOB to move to
FUNCTION.
Select
RTD
for the
FUNCTION
,
°F
or
°C
for the
UNITS
, and
RTD Type
(Pt 100 a=3850, Pt 200 a=3850, Pt 500 a=3850, Pt 1000 a=3850, Pt 100
a=3902, Pt 100 a=3916, Pt 100 a=3926, Cu 10 a=4274, Cu 50 a=4280, Ni 120 a=6720, Pt 10
a=3850, Pt 50 a=3850). Turn the
e
DIAL KNOB to move to the third menu page so the word
mA
DISPLAY
appears at the top of the menu.
Turn the
e
DIAL KNOB to move through the menu. Press the
e
DIAL KNOB to toggle between
OFF
and
ON
or to change the
MODE
setting.
MODE
- pressing the knob will cycle through READ, PWRM, READ% ,PWRM% and OFF.
READ
turns on the mA display and indicates current passing through the loop proportional to the
input of the transmitter which is controlled by the output of the 311Plus. Choose
READ%
if your
would like the mA display in percent of 4-20 milliamps.
PWRM
is POWER MEASURE which uses the internal loop supply of the 311Plus to power up the
transmitter while indicating the current passing through the loop proportional to the input of
transmitter which is controlled by the output of the 311Plus. Choose
PWRM%
if your would like
the mA display in percent of 4-20 milliamps.
If
PWRM
or
PWRM%
is selected an additional menu selection of
LEAK DETECT
will appear.
When
LEAK DETECT
is turned on the 311Plus will display
LEAK
and the amount of current
that is uncontrolled in the loop. This may be due to a faulty transmitter, corrosion causing a bridge
to ground or moisture present at some connection point. When
LEAK DETECT
tests a loop with
leakage the loop mA signal will be affected.
HART 250
Ω
- turn on the 250
Ω
resistor if you are powering up a HART transmitter. This provides
the loop load required for HART communication.
EXIT MENU
- exits this menu immediately and saves any changes. Menu will automatically exit after
15 seconds of inactivity.
mA DISPLAY
> EXIT (3/4)
MODE
OFF
READ PWRM READ% PWRM
%
HART 250
Ω
OFF
ON
LEAK DETECT OFF
ON
MAIN
> >EXIT (1/4)
FUNCTION RTD
UNITS
°C
°F
RTD Pt 100
a
=3850,
Pt 200
a
=3850,
Pt 500
a
=3850, Pt 1000
a
=3850,
Pt 100
a
=3902, Pt 100
a
=3916,
Pt 100
a
=3926,
Cu 10
a
=4274, Cu 50
a
=4280,
Ni 120
a
=6720
Pt 10
a
=3850, Pt 50
a
=3850