Practical Instrument Electronics
Page 2
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EZ-CHECK™ SWITCH
SOURCE: Instantly output two preset thermocouple
temperatures by moving the EZ-CHECK™ switch to
the “LO” position or “HI” position. For fast three
point checks select the “DIAL” position. The
PIECAL 422 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 422 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.
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SOURCE/OFF/READ Switch
Select “ SOURCE
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Select “ READ ” to read a thermocouple sensor
or millivolts.
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EZ-DIAL™ KNOB
SOURCE: Turn the knob to adjust the output
level. Turn clockwise to increase the output,
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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 clears the HI/LO temperature readings
which will update as the temperature changes.
Double click the knob to get into the PIECAL 422
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 422 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.
Basic Operation
AUTOMATED THERMOCOUPLE
CALIBRATOR
J‐T‐E‐K‐R‐S‐B‐N‐G‐C‐D‐L‐U‐P‐mV
READ
SOURCE
HI
SET
LO
MAX
READ
MIN
OVERLOAD
Push & Hold
to
Store/Step
Push & Turn
for
Fast Dialing
Double Click
for Options
OFF
READ
HI
TYPE K °C
17.332mV 22.4°C
422.1
Simulating or reading thermocouples requires
the use of thermocouple or extension grade
thermocouple wire.
Plug thermocouple wires into the female
miniature thermocouple connector mounted in
the top end of the housing.
Connections
The PIECAL 422 has two banana jacks mounted
in the top end of the housing. These are not
temperature compensated and are to be used
only for millivolt signals.
Please contact an authorized sales representative at 800-346-4620 or order at www.Instrumentation.com
