Practical Instrument Electronics
Page 1
PIECAL 422
Automated Thermocouple Calibrator
Operating Instructions
PIECAL 422
Automated Thermocouple Calibrator
Operating Instructions
Copyright © 2011 All rights reserved • 422-9002 - Rev C 13 July 2011
Product Description
• Easy to use
With the PIECAL 422 you can check & calibrate all
your thermocouple instruments and measure
thermocouple sensors.
• Take it without into the shop, plant or eld
Carry it without worry - it comes protected with a
rubber boot and rugged, low prole 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 422 works with the
thermocouples you use including types J, T, E, K, R,
S, B, N, G, C, D, L (J-DIN), U (T-DIN) and Platinel II.
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 nd broken wires. The PIECAL 422 measures the
thermocouple in degrees C or F. Secondary display shows the millivolt value corresponding to
the thermocouple temperature as well as the cold junction temperature measured by the
calibrator.
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Page 2
q 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 o.
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.
w SOURCE/OFF/READ Switch
Select “ SOURCE .stlovillim ro ,
F° ,C° ni tuptuo ot ”
Select “ READ ” to read a thermocouple sensor
or millivolts.
e EZ-DIAL™ KNOB
SOURCE: Turn the knob to adjust the output
level. Turn clockwise to increase the output,
°1.0 ni tuptuo eht esaerced ot esiwkcolc retnuoc
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
Conguration Mode. Use conguration to select
°C or °F, T/C Type, Backlight On/O, Step Size,
Step Time and Auto O On/O.
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 o. 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 conguration 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.
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Practical Instrument Electronics
Page 3
Configuration
Congure the Calibrator
Move
w POWER SWITCH to “SOURCE” or
“READ” .
Setup
Double click the
e DIAL KNOB at any time the
unit is on and the following displays will appear
for 15 seconds:
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.
EXIT MENU - exits this menu immediately and
saves any changes. Menu will automatically exit
after 15 seconds of inactivity (countdown timer is
displayed).
MODEL 422 V#.##
DOUBLE CLICK
EZ-DIAL KNOB
FOR CONFIGURATION
> EXIT 15
TEMP UNITS °C
T/C K
CJC ON
BACKLIGHT ON
> EXIT 15
STEPS 3
STEP TIME 8
AUTO OFF ON
TEMP UNITS - pressing the knob will toggle
between °C and °F.
T/C - pressing the knob will cycle through T/C
types J, T, E, K, R, S, B, N, G, C, D, L (J-DIN), U
(T-DIN) and Platinel II.
CJC - Automatic CJC (Cold Junction
Compensation) may be turned on or o. It is
recommended that CJC be left on (default). CJC
should only be turned o if an external cold
junction compensator or ice bath is used with
the PIECAL 422.
BACKLIGHT - If BACKLIGHT is ON the
backlight will light all the time the unit is powered
up. For maximum battery life turn the backlight
o 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 o 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 o
position.
SHOW mV - If SHOW mV is ON the mV value
corresponding to the sourced or measured
temperature is displayed.
SHOW CJ - If SHOW CJ is ON the cold junction
temperature measured by the PIECAL 422 will
be displayed.
Note: All settings are remembered even with the
power o. Removing the batteries resets the
values to
factory defaults.
> EXIT 15
SHOW mV ON
SHOW CJ ON
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Practical Instrument Electronics
Page 4
SOURCE
Choose this function to provide a simulated thermocouple signal into controllers, temperature
transmitters, indicators or any input devices that measure thermocouple sensors..
1) Disconnect the thermocouple sensor from the
device to be calibrated.
2) Select “ SOURCE ” with slide switch
w.
3) Connect a thermocouple wire (matching the type
of wire to sensor being simulated) with miniature
male T/C connector to the inputs of the device
being calibrated, making sure to check polarity.
Millivolt outputs (without cold junction) may be
connected with a copper (white) miniature T/C
connector or the banana jacks with copper wire.
The output is adjusted in 0.1° (or 0.001 mV)
increments by turning the knob e while the
EZ-CHECK™ switch
q ”TES“ ro ”OL“ ,”IH“ eht ni si
position. Pr
ess and turn the knob for faster dialing
with 10° (or 0.100) increments.
The OVERLOAD indicator will light if excessive
voltage or current is detected by the calibrator.
Sourcing Thermocouple
AUTOMAT ED TH ERMOCOUPLE
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
READ
Choose this function to measure temperatures with a thermocouple probe or sensor.
1) Disconnect the thermocouple sensor from any other device.
2) Select “ READ ” with slide switch w .
3) Place the EZ-CHECK switch into the READ position.
4) Connect a thermocouple probe (matching the type of wire to sensor being measured) with min iature male T/C connector to the sensor. Millivolt outputs (without cold junction) are connected
with a copper (white) miniature thermocouple connector or to the banana jacks with cooper wire.
The PIECAL 322 measures the temperature signal and constantly updates the display with the
current temperature reading. Move the EZ-CHECK switch to MAX to see the highest temperature
reading and to MIN to see the lowest temperature reading. Press and hold the knob
e to clear the
MAX and MIN readings.
The OVERLOAD indicator will light if
excessive voltage or current is detected by the calibrator.
Reading Thermocouple Sensors
Warranty
Our equipment is warranted against defective material and workmanship (excluding batteries) for a
period of three years from the date of shipment. Claims under warranty can be made by returning
the equipment prepaid to our factory. The equipment will be repaired, replaced or adjusted at our
option. The liability of Practical Instrument Electronics (PIE) is restricted to that given under our
warranty. No responsibility is accepted for damage, loss or other expense incurred through sale or
use of our equipment. Under no condition shall Practical Instrument Electronics, Inc. be liable for any
special, incidental or consequential damage.
Please contact an authorized sales representative at 800-346-4620 or order at www.Instrumentation.com
Practical Instrument Electronics
Page 5
To change the Automatic Stepping settings
Double click the e DIAL KNOB at any time the unit is on and the following display will appear for 30
seconds:
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
STEPS and the STEP TIME settings. These settings are
remembered even with the power o.
EXIT MENU - exits this menu immediately and saves any
changes. Menu will automatically exit after 30 seconds of
inactivity.
STEPS - pressing the knob will cycle through 2, 3, 5, 11 and 21 steps then reverse dircetion. The
endpoints of the steps are based on the values stored in the HI and LO EZ-CHECK outputs.
2 steps will automatically switch between the values stored in
the HI & LO EZ-CHECK (0 &
100%).
3 steps between the HI, Midpoint and LO EZ-CHECK (0, 50 & 100%).
5 steps between the HI and LO EZ-CHECK in 25% increments (0, 25, 50, 75 & 100%).
11 steps between the HI and LO EZ-CHECK in 10% increments (0, 10, 20...80, 90 &100%).
21 steps between the HI and LO EZ-CHECK in 5% increments (0, 5, 10... 90, 95 & 100%).
STEP TIME - pressing the knob will cycle through 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 and 60 seconds.
To start the Automatic Stepping
Start automatic stepping or ramping by placing the EZ-CHECK Switch into the HI or LO position
then press and hold the
e DIAL KNOB for 6 seconds (the word STORE will appear on the display
after 3 seconds and continue to press the DIAL KNOB) until the word STEPPING appears on the
display.
The word STEPPING will appear on the display anytime the selected automatic function is
running. Stop the stepping by again pressing and holding the e DIAL KNOB for 3 seconds.
Automatic Stepping
Storing EZ-CHECK Outputs
STORING HI and LO EZ-CHECK Outputs
Choose this function to provide a simulated thermocouple signal into controllers, temperature
transmitters, indicators or any other input device that measure thermocouple sensors..
1) Store your high (SPAN) output temperature by moving the EZ-CHECK switch to the HI position
and turn the
e EZ-Dial knob until the desired temperature is on the display. Press and hold the
EZ-Dial knob until STORED appears to store the value. Release the EZ-Dial knob.
2) Store your low (ZERO) output temperature by moving the EZ-CHECK switch to the LO position
and turn the
e EZ-Dial knob until the desired temperature is on the display. Press and hold the
EZ-Dial knob until STORED appears to store the value. Release the EZ-Dial knob.
3) Instantly output your SPAN and ZER
O temperature outputs by moving the EZ-CHECK switch
between HI and LO. You may also select any third temperature output (such as mid-range) using
the SET position on the EZ-CHECK switch.
EXIT 15
> STEPS 3
STEP TIME 8
AUTO OFF ON
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Practical Instrument Electronics
Page 6
T/C
Type
Degrees C
Range
Accuracy Degrees F
Range
Accuracy T/C
Material
ISA/ANSI
Color
J -200.0 to -180.0 ±0.3° -346.0 to -292.0 ±0.5° +Iron
-Connstantan
Jacket
White
Red
Black
-180.0 to -50.0 ±0.2° -292.0 to -58.0 ±0.4°
-50.0 to 500.0 ±0.1° -58.0 to 932.0 ±0.2°
500.0 to 1200,0 ±0.2° 932.0 to 2192.0 ±0.4°
K -230.0 to -100.0 ±0.6° -382.0 to -148.0 ±1.1° + Chromel®
-Alumel®
Jacket
Yellow
Red
Yellow
-100.0 to 1050.0 ±0.2° -148.0 to 1922.0 ±0.4°
1050.0 to 1371.1 ±0.3° 1922.0 to 2500.0 ±0.5°
T -260.0 to -200.0 ±1.0° -436.0 to -328.0 ±1.8° +Copper
-Constantan
Jacket
Blue
Red
Blue
-200.0 to -50.0 ±0.5° -328.0 to -58.0 ±0.9°
-50.0 to 0.0 ±0.2° -58.0 to 32.0 ±0.4°
0.0 to 400.0 ±0.1° 32.0 to 752.0 ±0.2°
E -240.0 to -200.0 ±0.4° -400.0 to -328.0 ±0.7° +Chromel
-Constantan
Jacket
Purple
Red
Purple
-200.0 to -100.0 ±0.2° -328.0 to -148.0 ±0.4°
-100.0 to 850.0 ±0.1° -148.0 to 1562.0 ±0.2°
850.0 to 1000.0 ±0.2° 1562.0 to 1832.0 ±0.4°
R -13.3 to 250.0 ±1.2° -1.0 to 482.0 ±2.2° +Pt/13Rh
-Platinum
Jacket
Black
Red
Green
250.0 to 750.0 ±0.6° 482.0 to 1382.0 ±1.1°
750.0 to 1600.0 ±0.5° 1382.0 to 2192.0 ±0.9°
1600.0 to 1767.8 ±0.6° 2192.0 to 3214.0 ±1.1°
S -18.3 to 100.0 ±1.2° -1.0 to 212.0 ±2.1° +Pt/10Rh
-Platinum
Jackrt
Black
Red
Green
100.0 to 400.0 ±0.8° 212.0 to 752.0 ±1.4°
400.0 to 1700.0 ±0.6° 752.0 to 3092.0 ±1.1°
1700.0 to 1767.8 ±0.7° 3092.0 to 3214.0 ±1.3°
B 315.6 to 550.0 ±1.8° 600 to 1022.0 ±3.2° +Pt/30Rh
-Pt/6Rh
Jacket
Grey
Red
Grey
550.0 to 900.0 ±1.1° 1022.0 to 1652.0 ±2.0°
900.0 to 1150.0
±0.7° 1652.0 to 2102.0 ±1.3°
1150.0 to 1820.0 ±0.6° 2102.0 to 3308.0 ±1.1°
Ranges & Accuracies
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Practical Instrument Electronics
Page 7
T/C
Type
Degrees C
Range
Accuracy Degrees F
Range
Accuracy T/C
Material
ISA/ANSI
Color
N -230.0 to -180.0 ±1.0° -382.0 to -292.0 ±1.8° +Nicrosil
-Nisil
Jacket
Orange
Red
Orange
-180.0 to -50.0 ±0.5° -292.0 to -58.0 ±0.9°
-50.0 to 1100.0 ±0.2° -58.0 to 2012.0 ±0.4°
1100.0 to 1300.0 ±0.3° 2012.0 to 2372.0 ±0.5°
G
(W)
100.0 to 150.0 ±1.2° 212.0 to 302.0 ±2.2° +Tungsten
-W26/Re
Jacket
White
Red
White/Blue
150.0 to 400.0 ±0.8° 302.0 to 752.0 ±1.4°
400.0 to 1700.0 ±0.4° 752.0 to 3092.0 ±0.7°
1700.0 to 2320.0 ±0.7° 3092.0 to 4208.0 ±1.3°
C
(W5)
-1.1 to 1500 ±0.5° 30.0 to 2372.0 ±0.9° +W5/Re
-W26/Re
Jacket
White
Red
White/Red
1500 to 1900 ±0.6° 2372.0 to 3452.0 ±101°
1900.0 to 2100.0 ±0.7° 3452.0 to 3812.0 ±1.3°
2100.0 to 2320.0 ±0.9° 3812.0 to 4208.0 ±1.6°
D -1.0 to 50.0 ±0.6° 30.0 to 122.0 ±1.1° +W3/Re
-W25/Re
Jacket
White
Red
White/Yellow
50.0 to 1400.0 ±0.4° 122.0 to 2552.0 ±0.7°
1400.0 to 1800.0 ±0.5° 2552.0 to 3272.0 ±0.9°
1800.0 to 2320.0 ±0.9° 3272.0 to 4208.0 ±1.6°
P
Platinel®
-217.8 to -150.0 ±0.6° -360.0 to -238.0 ±1.1°
+Pd55/Pt31/Au14
-Au65/Pd35
Jacket
Yellow
Red
Black
-150.0 to -50.0 ±0.4° -238.0 to -58.0 ±0.7°
-50.0 to 1000.0 ±0.2° -58.0 to 1832.0 ±0.4°
1000.0 to 1395.0 ±0.3° 1832.0 to 2543.0 ±0.5°
DIN Colors
L
J-DIN
-200.0 to -50.0 ±0.2° -328.0 to -58.0 ±0.4° +Iron
-Connstantan
Jacket
Red
Blue
Blue
-50.0 to 500.0 ±0.1° -58.0 to 932.0 ±0.2°
500.0 to 750.0 ±0.2° 932.0 to 1382.0 ±0.4°
U
T-DIN
-200.0 to -75.0 ±0.3° -328.0 to -103.0 ±0.5° +Copper
-Constantan
Jacket
Red
Brown
Brown
-75.0
to 100.0 ±0.2° -103.0 to 212.0 ±0.4°
100.0 to 600.0 ±0.1° 212.0 to 1112.0 ±0.2°
Ranges & Accuracies
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Practical Instrument Electronics
Page 8
Accessories
Optional: T/C Wire Kit 1 for Types J, K, T & E Part No. 020-0202
Optional: T/C Wire Kit 2 for Types B, R/S & N Part No. 020-0203
Three feet (1 meter) of T/C extension wire, stripped on one end with a miniature T/C
male connector on the other end.
Standard Test Leads (Included with calibrator) Part No. 020-0207
Three feet (1 meter) of wire with an alligator clip on one end and a spring loaded
protected banana plug on the other end.
Optional Ni-MH 1 Hour Charger w/4 Ni-MH AA Batteries Part No. 020-0103
(100-120 V AC input for North America Only)
General
Accuracy ±(0.008% of Reading + 0.006 mV)
Cold Junction Compensation ± 0.16°F (±0.1 °C)
Millivolt Range -13.000 to 80.000 mV
Operating Temperature Range -25 to 60 °C (-10 to 140 °F)
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
Size L=5.63 x W=3.00 x H=1.60 inches
Weight 12.1 ounces (including boot & batteries)
Batteries Four “AA” Alkaline 1.5V (LR6)
Battery Life 50 Hours
Optional NiMh
Rechargeable battery kit
120 VAC for North America Only; charger, four
NiMh
batteries, AC & DC cords [Part # 020-0103]
Low Battery Low battery indication with nominal 1 hour of life left
Protection against misconnection Over-voltage protection to 60 V dc (rated for 30 seconds)
Display High contrast graphic liquid crystal display. LED backlighting
for use in low lit areas.
Read
Input Impedance
> 10 Megohms
Open Thermocouple
Threshold
Pulse
10,000 Ohms nominal
< 10 microamp pulse for 300 milliseconds
Normal Mode Rejection 50/60 Hz, 50 dB
Common Mode Rejection 50/60 Hz, 120 dB
PIECAL 422 Specifications
(Unless otherwise indicated all specifications are rated from a nominal 23 °C,
70 % RH for 1 year from calibration)
Source
Output Impedance < 0.3 Ohms
Source Current > 20 mA (drives 80 mV into 10 Ohms)
Noise ≤ 4 microvolts p-p for frequencies of 10 Hz or below
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