PIECAL 322
Automated Thermocouple Calibrator
Operating Instructions
PIECAL 322
Automated Thermocouple Calibrator
Operating Instructions
Product Description
• Easy to use
With the PIECAL 322-1 you can check & calibrate all
your thermocouple instruments and measure
thermocouple Sensors. Automatic indication of
connections on the display for simple hookups.
• Take it without into the shop, plant or field
Carry it without worry - it comes protected with a
rubber boot and rugged, low profile switch. Easy to
operate even in the dark areas of the plant with the
backlit display.
• Calibrate directly in temperature (°C & °F)
Stop carrying around a millivolt source and
thermocouple tables. The PIECAL 322-1 works with
the T/Cs you use including types J, K, T & E. Easily
set any value quickly to within 0.1° with the adjustable
digital potentiometer “DIAL” plus store any three
temperatures for instant recall with the EZ-CHECK™
switch.
• Calibrate quickly with automatic output stepping
Choose between 2, 3, 5, 11 and 21 steps to
automatically increment the output in 100%, 50%,
25%, 10% or 5% of span. Select the step time to
match your system from 5, 6, 7, 8, 10, 15, 20, 25, 30
and 60 seconds.
• Compatible with all process instruments
Connect directly to the thermocouple inputs of smart
transmitters, PLCs, DCS and multichannel recorders
and verify their outputs or displays.
• Measure Thermocouple Sensors
Trouble shoot sensor connections and find broken wires or high resistance junctions. Connect
your sensor and the PIECAL 322 automatically measures the thermocouple in degrees C or F.
99 Washington Street
Melrose, MA 02176
Visit us at www.TestEquipmentDepot.com
Phone 781-665-1400
Toll Free 1-800-517-8431
Basic Operation
w SOURCE/OFF/READ Switch
Select “SOURCE” to output in °C, °F, or millivolts.
Select “READ” to read a thermocouple sensor
or millivolts.
HI
322.1
TYPE K °C
THE RM OCO UP LE
CAL IB RATO R
J, T, E, K, mV
SOURCE
MAX
HI
READ
SET
OVERLOAD
OFF
MIN
LO
READ
Push & Turn
Fast Dialing
Push & Hold
Store/Ramp
Double Click
for Options
for
to
q EZ-CHECK™ SWITCH
SOURCE: Instantly output t wo preset thermocouple
temperatures by moving the EZ-CHECK™ switch to
the “LO” position or “HI” position.
point checks select the “DIAL” position. The
PIECAL 322-1 will remember the last “DIAL”
value, even with the power off.
These values can easily be changed to suit the
calibration requirements. The temperatures stored in
the HI and LO positions are also used for Auto
Stepping.
READ: Slide the switch to the DIAL position. The
PIECAL 322-1 will display the current temperature
from the thermocouple sensor. Slide the switch to HI
and the highest temperature measured since turn-on
or reset will be displayed; slide the switch to LO and
the lowest temperature measured since turn-on or
reset will be displayed.
For fast three
e EZ-DIAL™ KNOB
SOURCE: Turn the knob to adjust the output
level. Turn clockwise to increase the output,
counter clockwise to decrease the output in 0.1°
steps at a time. Push down and turn the
EZ-DIAL knob for faster dialing.
Press and hold the knob for two seconds to store
desired EZ-Check™ HI/LO points in SOURCE
mode. Continue to press and hold the knob for
two more seconds to start the automatic
ramping.
READ: Press and hold to transfer the current
temperature into the EZ-Check™ HI/LO points.
This resets the HI/LO temperature readings
which will update as the temperature changes.
Double click the knob to get into the PIECAL
322-1 Configuration Mode. Use configuration to
select °C or °F, T/C Type, Backlight On/Off, Step
Size, Step Time and Auto Off On/Off.
CHANGING BATTERIES
Low battery is indicated by “BAT” on the display.
Approximately one to four hours of typical
operation remain before the PIECAL 322-1 will
automatically turn off. To change the batteries;
remove the rubber boot, remove the battery door
from the back of the unit by sliding the door
downward. This allows access to the battery
compartment. Replace with four (4) “AA” 1.5V
batteries being careful to check the polarity.
Replace the battery door and replace the boot. All
stored configuration options (T/C Type,
EZ-CHECK Memories, etc., are reset to factory
settings when the batteries are removed.
Note: Alkaline batteries are supplied and
recommended for maximum battery life and
performance.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Configuration
Configure the Calibrator
Move w POWER SWITCH to “SOURCE” or
“READ”.
MODEL 322 V#.##
DOUBLE CLICK
EZ-DIAL KNOB
FOR CONFIGURATION
EXIT MENU - exits this menu immediately and
saves any changes. Menu will automatically exit
after 15 seconds of inactivity (countdown timer is
displayed).
TEMP UNITS - pressing the knob will toggle
between °C and °F.
T/C - pressing the knob will cycle through T/C
types J, K, T, E and mV.
Setup
Double click the
e DIAL KNOB at any time the
unit is on and the following displays will appear
for 15 seconds:
> EXIT 15
TEMP UNITS °C
T/C K
BACKLIGHT ON
> EXIT 15
STEPS 3
STEP TIME 8
AUTO OFF ON
Turn the e DIAL KNOB to move through the
menu. Press the e DIAL KNOB to toggle
between OFF and ON or to scroll through the
settings.
Basic Operation
Connecting the Calibrator
Thermocouple
Sourcing or reading thermocouples requires the
use of thermocouple or extension grade
thermocouple wire between the PIECAL 322 and
the device being calibrated.
The PIECAL 322 has a female miniature
thermocouple connector mounted in the top end
of the housing for fast, easy connection of wires.
Millivolt
The PIECAL 322 has two banana jacks mounted
in the top end of the housing. These jacks are not
temperature compensated and are to be used
only for generating and measuring millivolt signals.
BACKLIGHT - If BACKLIGHT is ON the
backlight will light all the time the unit is powered
up. For maximum battery life turn the backlight
off when using the calibrator in areas with
enough ambient light to read the display.
STEPS - pressing the knob will cycle through 2,
3, 5, 11 and 21 steps. The endpoints of the steps
are based on the values stored in the HI and LO
EZ-CHECK outputs.
STEP TIME - pressing the knob will cycle
through 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 and 60
seconds.
AUTO OFF - If AUTO OFF is ON, the unit will
turn off after 30 minutes of inactivity to save
battery life. If AUTO OFF is OFF the unit will stay
on until the POWER SWITCH is moved to the off
position.
Note: All settings are remembered even with the
power off. Removing the batteries resets the
values to factory defaults.
Thermocouple Wire
HI
322.1
TYPE K °C
THER MOC OUP LE
CALI BRAT OR
J, T, E, K, mV
SOURCE
MAX
HI
READ
SET
OFF
MIN
LO
READ
Push & Turn
Fast Dialing
Push & Hold
Store/Ramp
Double Click
for Options
for
to
OVERLOAD
Device
Requiring
Calibration
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