Extech Instruments 422123 Manuale utente

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 781.665.0780 - TestEquipmentDepot.com

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

V 2.0 12/04

025

°C

TJK

SHIFT

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).

V 2.0 12/04

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 781.665.0780 - TestEquipmentDepot.com

V 2.0 12/04

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.

V 2.0 12/04

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 781.665.0780 - TestEquipmentDepot.com

V 2.0 12/04

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.

V 2.0 12/04

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 781.665.0780 - TestEquipmentDepot.com

V 2.0 12/04

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

V 2.0 12/04

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 781.665.0780 - TestEquipmentDepot.com

Back to the Extech 422123 Product Page

Visit us at www.TestEquipmentDepot.com

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