Extech Instruments 422123 User manual

User's Manual
Precision Multifunction Calibrator
Model 422123
Introduction
Congratulations on your purchase of the Extech 422123 Precision Multifunction Calibrator.
This device can source mA, mV, V, Temperature (°C/°F) and Frequency. This device also
offers STEP and AUTO RAMP features. Careful use of this meter will provide years of
reliable service.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

V 2.0 12/04
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025
%
Hz
V
°C
TJK
E
SHIFT
1
2
3
4
6
5
Meter Description
1. 5-digit LCD display
2. Numeric and Function Keypad
3. Thermocouple input jack
4. Power ON/OFF key
5. SHIFT button (activates 2nd functions on keypad)
6. Function Switch
NOTE: The battery compartment, tilt stand, and
AC Adapter/External Battery Pack input jack
are located on the rear of the meter.
Keypad Function Commands
1. Select output range for current
mode
2. Select output range for voltage
mode
3. Automatic Ramp Function
(current and voltage only).
4. Select output in % (current and
voltage only).
Also the “–“ key for negative
values.
Also the decimal point.
5. Select temperature units and
thermocouple type.
6. Step function up and down
(current and voltage only).
1
2
3
4
5
6

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Operation
Powering the meter
1. Select a means of powering the unit (9V battery, external pack, or optional AC
adapter). The 9V battery compartment is located on the rear (bottom) of the meter
secured by one Phillips head screw. The AC adapter and the External Battery Pack
plug into the DC12V jack located on the back of the meter just above the tilt stand. The
Battery Pack holds six 1.5V 'AA' batteries. The optional AC Adapter is recommended
for heavy usage.
2. Press the red ON/OFF button to turn the meter ON.
3. Wait until the STANDBY display extinguishes before using the meter.
4. To turn the meter OFF, press the red ON/OFF button again.
Note: The 422123 calibrator will begin to output the desired
signal after the user presses ENTER or immediately after the
fifth digit has been entered.
DC Milliamp Outputs (4 to 20, 0 to 20, and 0 to 24mA)
1. Ensure that the meter's test leads are not shorted or connected to any devices.
2. Slide the function switch to the mA position and wait for the STANDY display to
extinguish.
3. Connect the meter's red (positive) and black (negative) test leads to the device or
circuit under calibration. Use banana-to-alligator leads if necessary.
4. Select the desired mA output range by pressing the SHIFT button and then one of the
current output keys:
4-20mA output
0-20mA output
0-24mA output
5. Enter a mA current output using the numeric keys (for example, press '5') then ENTER
to output 5mA or press 5.0000. Note that the 5-digit LCD can only accept 5 digits.
6. If the circuit under calibration is open or if the load that the meter is driving is greater
than 1000Ω, the meter will display the OL (overload) alarm warning and will emit a
series of beeps.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

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DC Voltage Output (0 to 1V, 0 to 12V, 0 to 100mV)
1. Ensure that the meter's test leads are not shorted or connected to any devices.
2. Slide the function switch to the 'V, mV' position and wait for STANDBY to extinguish.
3. Connect the meter's red (positive) and black (negative) test leads to the device or
circuit under test. Use alligator clips if necessary.
4. Select the desired output range by pressing the SHIFT button and then the voltage
range key (mV 1V 12V) until the range is selected. The following meter displays (on
left) correspond to the ranges shown at right:
00.000 V: 0 to 12.000V range
0.0000 V: 0 to 1.0000V range
000.00 mV: 0 to 100.00mV range
5. Once the proper range is selected, press the SHIFT button again.
6. Enter an output voltage value using the numeric keys (for example, in the 100mV
range, press '50') then ENTER. Keep in mind that the maximum number of digits that
can be entered is 5.
7. If the circuit under calibration is shorted, the meter will display the OL (overload) alarm
warning and will emit a series of beeps.
Temperature Output (Type K, J, E, T Thermocouple Simulations)
1. Slide the function switch to the 'oC/oF' position and wait for the STANDBY display to
extinguish.
2. Connect the thermocouple connection cable to the meter's TC output (the jack is
located just above the ON/OFF switch). 'K' and 'J' type thermocouples are supplied.
3. Connect the other end of the thermocouple cable to the device under calibration.
4. Select the thermocouple type to simulate by pressing the SHIFT button and then the '6/
KJET' key until the desired type appears on the right side of the LCD (Type K, J, E, or
T).
5. After selecting the type press the SHIFT button again.
6. Type a temperature output value using the numeric keypad and then press ENTER.
Note there is a 4-digit limit. To type a negative temperature value, press the minus key
first, then enter the desired output temperature.
7. A signal will be sent to the device under calibration (a panel meter, for example)
simulating a thermocouple.
8. Press the SHIFT key then the '°F°C' key to select the correct unit of measure.
NOTE: Connect the thermocouple connecting cable to the meter and the device under
calibration well in advance of use (20 minutes or so) to acclimate the devices to the
ambient temperature. This will ensure optimal precision.
Frequency Output (1kΩmin. load)
1. Ensure that the meter's test leads are not shorted or connected to any devices.
2. Slide the function switch to the 'Hz' position and wait for STANDBY to extinguish.
3. Connect the meter's red (positive) and black (negative) test leads to the device or
circuit under calibration. Use the banana-alligator clip leads if necessary.
4. Enter the desired frequency using the numeric keypad. Note that the top (smaller) LCD
digits are a continuation of the main LCD digits string; this provides the full display
resolution required.
5. All frequencies below 125Hz are available in 1 Hz steps. Selected frequencies from
125 to 62,500 Hz are available per the list in the Appendix table at end of manual.

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Advanced Functions
Programming an Output in Percent (Current and Voltage Outputs Only)
Output values can also be programmed in percent. For example, a 4 to 20mA output can
be programmed as follows: 0% = 4mA, 50% = 12mA, and 100% = 20mA. The main LCD
digits will reflect the actual output while the top (smaller) digits will display the percentage.
Follow these steps to output a signal in percent:
1. Setup a test as described earlier for a current or voltage output.
2. Press the SHIFT button so that the word SHIFT appears on the LCD.
3. Press the %key.
4. Enter a percentage from 0 to 100% (1% resolution) using the numeric keys.
5. Press the ENTER key.
6. The current or voltage signal will be output from the meter.
7. 0% corresponds to the lowest value in the range ('4mA' for 4 to 20mA, '0mV' for 0 to
100mV, for example.) while 100% corresponds to the highest value in the output range
('20mA' for 4 to 20mA range, '100mV' for 0 to 100mV range). All percentages in
between will be linear to the voltage or current ranges.
8. Refer to the list below for the 1% step value for each range:
4 to 20mA: 1% = 0.16mA
0 to 20mA: 1% = 0.2mA
0 to 24mA: 1% = 0.24mA
0 to 100mV: 1% = 1mV
0 to 1V: 1% = 0.01V
0 to 12V: 1% = 0.12V
Step Mode (Current and Voltage Outputs Only)
This feature allows the user to step up and down through the output range in programmed
steps as follows:
1. Setup a test as described earlier for a current or voltage output.
2. Press the SHIFT key and then the %key.
3. Enter a percentage (1 to 100%) using the numeric keys. This percentage will represent
the size of each step. Press the ENTER key when complete.
4. Now each time the '8 % ' key is pressed, the output signal will be increased by the
percentage programmed (in the previous step). Press the '0 % ' key to step the
output down by the percentage programmed.
5. For example, for a 4 to 20mA output type and a step percentage of 25%, the following
steps are possible: 0% = 4mA
25% = 8mA
50% = 12mA
75% = 16mA
100% = 20mA
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

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Automatic Ramp Function (Current and Voltage Outputs Only)
The Auto Ramp feature adjusts the meter's output from 0 to 100% →100% to 0% →0 to
100%, and so on. The top (smaller) LCD displays the percent output while the main LCD
digits display the actual signal output.
1. Setup a test as described earlier for a current or voltage output.
2. Press the SHIFT key and then the RAMP 7 key.
3. The output signal will now ramp from 0 to 100% →100% to 0% →0 to 100%, etc.
4. Press the RAMP 7 key to pause/resume the ramp.
5. Press the SHIFT button to exit this mode and return to normal operation.
Note: Each 1% step has a time interval of 0.08 seconds; therefore it takes 8 seconds to
ramp from 0 to 100%.
Maintenance
9V Battery Replacement
Open the battery compartment on the back of the meter by removing the Phillips head
screw and battery compartment cover. Replace the battery and secure the battery
compartment.
Six 1.5V 'AA' External Battery Replacement
Open the battery pack by the Velcro flap and slide the battery tray out. Replace the six
batteries observing polarity.
Meter Cleaning
Periodically wipe the meter case with a damp cloth. Do not use abrasives or solvents to
clean the meter.

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Specifications
Display Large 5 digit multifunction LCD
Output (source) Ranges, Resolution, and Accuracy
DC Current 4 to 20.000mA, 0 to 20.000mA, 0 to 24.000mA
Accuracy for all mA ranges: ± (0.025% + 3 digits)
DC Voltage 0 to 100.00mV; 0 to 1.0000V; 0 to 12.000V;
Accuracy for all voltage ranges: ± (0.05% + 3 digits)
Type K Temperature -328 to 32oF (-200 to 0oC); Accuracy: ±2.0oF (1.1oC)
32 to 2400oF (0 to 1300oC); Accuracy: ±1.5oF (0.8oC)
Type J Temperature -148 to 32oF (-100 to 0oC); Accuracy: ±1.6oF (0.9oC)
32 to 1400oF (0 to 760oC); Accuracy: ±1.2oF (0.7oC)
Type E Temperature -148 to 32oF (-100 to 0oC); Accuracy: ±1.6oF (0.9oC)
32 to 1292oF (0 to 700oC); Accuracy: ±1.2oF (0.7oC)
Type T Temperature -328 to 32oF (-200 to 0oC); Accuracy: ±1.8oF (1.0oC)
32 to 752oF (0 to 400oC); Accuracy: ±1.5oF (0.8oC)
Frequency 1 to 125 Hz; Accuracy: ± 0.04Hz
126 Hz to 62,500 Hz; Accuracy: ± (0.01% + 0.04Hz)
Accuracy notes All published accuracies are 'of reading'. Meter must be
warmed up for 20 minutes before use for optimum accuracy.
Power supply 9V battery, external battery pack (6 x 1.5V 'AA'),
or optional AC adapter;
Power Consumption 60 to 180mA
Operating Conditions 32 to 122oF (0 to 50oC); 85% RH max.
Storage Conditions -4 to 140oF (-20 to 60oC); 85% RH max.
Dimensions 3.46 x 6.61 x 1.03" (88 x 168 x 26mm)
Weight 11.63 oz. (330g)
Accessories Test leads (banana to alligator clip type), carrying case, 9V
battery, battery-pack with six 1.5V AA batteries, and two
temperature cables (Type-K & Type J; sub-miniature to sub-
miniature connector type).
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

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Appendix - Frequency Output Table
All frequencies below 125Hz (inclusive) are available in 1 Hz steps. However, only specific
frequencies above 126 (inclusive) are available. Refer to the Table below.
126.00 127.03 128.07 129.13 130.20 131.30 132.41 133.54
134.12 135.28 136.46 137.06 138.27 139.50 140.13 141.40
142.04 143.34 144.00 145.34 146.02 147.40 148.10 149.52
150.24 151.69 152.43 153.18 154.70 155.47 156.25 157.03
158.62 159.43 160.25 161.08 162.76 163.61 164.47 165.34
166.22 167.11 168.01 169.83 170.76 171.70 172.65 173.61
174.58 175.56 176.55 177.55 178.57 179.59 180.63 181.68
182.74 183.82 184.91 186.01 187.12 188.25 189.39 190.54
191.71 192.90 194.09 195.31 196.54 197.78 199.04 200.32
201.61 202.92 204.24 205.59 206.95 208.33 209.73 211.14
212.58 214.04 215.51 217.01 218.53 220.07 221.63 223.21
224.82 226.44 228.10 229.77 231.48 233.20 234.96 236.74
238.54 240.38 242.24 244.14 246.06 248.01 250.00 252.01
254.06 256.14 258.26 260.41 262.60 264.83 267.09 269.39
271.73 274.12 276.54 279.01 281.53 284.09 286.69 289.35
292.05 294.81 297.61 300.48 303.39 306.37 309.40 312.50
315.65 318.87 322.16 325.52 328.94 332.44 336.02 339.67
343.40 347.22 351.12 355.11 359.19 363.37 367.64 372.02
376.50 381.09 385.80 390.62 395.56 400.64 405.84 411.18
416.66 422.29 428.08 434.02 440.14 446.42 452.89 459.55
466.41 473.48 480.76 488.28 490.19 492.12 494.07 496.03
498.00 500.00 502.00 504.03 506.07 508.13 510.20 512.29
514.40 516.52 518.67 520.83 523.01 525.21 527.42 529.66
531.91 534.18 536.48 538.79 541.12 543.47 545.85 548.24
550.66 553.00 555.55 558.03 560.53 563.06 565.61 568.18
570.77 573.39 576.03 578.70 581.39 584.11 586.85 589.62
592.41 595.23 598.08 600.96 603.86 606.79 609.75 612.74
615.76 618.81 621.89 625.00 628.14 631.31 634.51 637.75
641.02 644.32 647.66 651.04 654.45 657.89 661.37 664.89
668.44 672.04 675.67 679.34 683.06 686.81 690.60 694.44
698.32 702.24 706.21 710.22 714.28 718.39 722.54 726.74
730.99 735.29 739.64 744.04 748.50 753.01 757.57 762.19
766.87 771.60 776.39 781.25 786.16 791.13 796.17 801.28
806.45 811.68 816.99 822.36 827.81 833.33 838.92 844.59
850.34 856.16 862.06 868.05 874.12 880.28 886.52 892.85
899.28 905.79 912.40 919.11 925.92 932.83 939.84 946.96
954.19 961.53 968.99 976.56 984.12 992.06
1000.00 1008.06 1016.26 1024.59 1033.05 1041.66 1050.42 1059.32
1068.37 1077.58 1086.95 1096.49 1106.19 1116.07 1126.12 1136.36
1146.78 1157.58 1168.22 1179.24 1190.47 1201.92 1213.59 1225.49
1237.62 1250.00 1262.62 1275.51 1288.65 1302.08 1315.78 1329.78
1344.08 1358.69 1373.62 1388.88 1404.49 1420.45 1436.78 1453.48
1470.58 1488.09 1506.02 1524.39 1543.20 1562.50 1582.27 1602.56
1623.37 1644.73 1666.66 1689.18 1712.32 1736.11 1760.56 1785.71
1811.59 1838.23 1865.67 1893.93 1923.07 1953.12 1960.78 1968.50
1976.28 1984.12 1992.03 2000.00 2008.03 2016.12 2024.29 2032.52
2040.81 2049.18 2057.61 2066.11 2074.68 2083.33 2092.05 2100.84

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2109.70 2118.64 2127.65 2136.75 2145.92 2155.17 2164.50 2173.91
2183.40 2192.98 2202.64 2212.38 2222.22 2232.14 2242.15 2252.25
2262.44 2272.72 2283.10 2293.57 2304.14 2314.81 2325.58 2336.44
2347.41 2358.49 2369.66 2380.95 2392.34 2403.84 2415.45 2427.18
2538.07 2450.98 2463.05 2475.24 2487.56 2500.00 2512.56 2525.25
2438.07 2551.02 2564.10 2577.31 2590.67 2604.16 2617.80 2631.57
2645.50 2659.57 2673.79 2688.17 2702.70 2717.39 2732.24 2747.25
2762.43 2777.77 2793.29 2808.98 2824.85 2840.90 2857.14 2873.56
2890.17 2906.97 2923.97 2941.17 2958.57 2976.19 2994.01 3012.04
3030.30 3048.78 3067.48 3086.41 3105.59 3125.00 3144.65 3164.55
3184.71 3205.12 3225.80 3246.75 3267.97 3289.47 3311.25 3333.33
3355.70 3378.37 3401.36 3424.65 3448.27 3472.22 3496.50 3521.12
3546.09 3571.42 3597.12 3623.18 3649.63 3676.47 3703.70 3731.34
3759.39 3787.87 3816.79 3846.15 3875.96 3906.25 3937.00 3968.25
4000.00 4032.25 4065.04 4098.36 4132.23 4166.66 4201.68 4237.28
4273.50 4310.34 4347.82 4385.96 4424.77 4464.28 4504.50 4545.45
4587.15 4629.62 4672.89 4716.98 4761.90 4807.69 4854.36 4901.96
4950.49 5000.00 5050.50 5102.04 5154.63 5208.33 5263.15 5319.14
5376.34 5434.78 5494.50 5555.55 5617.97 5681.81 5747.12 5813.95
5882.35 5952.38 6024.09 6097.56 6172.83 6250.00 6329.11 6410.25
6493.50 6578.94 6666.66 6756.75 6849.31 6944.44 7042.25 7142.85
7246.37 7352.94 7462.68 7575.75 7692.30 7812.50 7936.50 8064.51
8196.72 8333.33 8474.57 8620.68 8771.92 8928.57 9090.90 9159.25
9433.96 9615.38 9803.92
10000.00 10204.08 10416.66 10638.29 10869.56 11111.11 11363.63 11627.90
11904.76 12195.12 12500.00 12821.51 13157.89 13513.51 13888.88 14285.71
14705.88 15151.51 15625.00 16129.03 16666.66 17241.37 17857.14 18518.51
19230.76 20000.00 20833.33 21739.13 22727.27 23809.52 25000.00 26315.78
27777.77 29411.76 31250.00 33333.33 35714.28 38461.53 41666.66 45454.54
50000.00 55555.55 62500.00
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com
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