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Omega CA450 User Manual

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Model CA450
Process Multimeter
M-5187
1st Edition: Aug. 2012

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  • Page 1 User’s Model CA450 Manual Process Multimeter Store this manual in a safe place for future reference. M-5187 1st Edition: Aug. 2012...

  • Page 2: About This Manual

    ■ About This Manual • Every effort has been made to ensure accuracy in the preparation of this manual. However, should any errors or omissions come to the attention of the user, please contact Omega Engineering. • The contents of this manual are subject to change without prior notice because of improvement in performance or function. • All rights reserved. No part of this manual may be reproduced in any from without...
  • Page 3 Thank you for purchasing our CA450 Process Multimeter . This user’s manual describes the specifications and handling precaution for this Process Multimeter. Before using this Process Multimeter, thoroughly read this manual to get a clear understanding on proper use. Always observe the following instructions. Failure to do so may impair the protection provided by the instrument and probes, and may result in electrical shock or other dangers that may lead to serious injury or the loss of life. Omega Engineering is in no way liable for any damage resulting from the user’s mishandling of the product. Revision Information...
  • Page 4 Regarding Safe Use of This Product For safe use of this product, the following safety symbols are used on the product and manual: WARNING This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of serious injury or the loss of life. CAUTION This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of injury or damage to the product. Note This indicates information that is essential for handling the instrument or should be noted in order to familiarize yourself with the instrument’s operating procedures and/or functions. This indicates supplemental information for explanations. Danger! Handle with Care This symbol indicates that the operator must refer to an explanation in the instruction manual in order to avoid risk of injury or death of personnel or damage to the instrument. This symbol indicates double insulation or reinforced insulation. This symbol indicates DC voltage/current. This symbol indicates AC voltage/current.

  • Page 5: Operating Environment

    ■ Always observe the following instructions. Failure to do so may result in electrical shock or other dangers that may lead to serious injury or the loss of life. Test Leads and Lead cables • Use the products provided by Omega Engineering for this device. • Do not use degraded or damaged test leads or lead cables. Check the continuity of the test leads and lead cables. • When you attach or remove the test leads or lead cables or remove the case (for example to change the batteries), be sure to remove the lead cables from the circuit under measurement.
  • Page 6 Concernant l’usage en toute sécurité de ce produit Symboles utilisés sur les appareils et dans le manuel d’instruction: Avertissement Indique un danger. Attire l’attention sur une utilisation quipourrait engendrer des accidents susceptibles de provoquer des blessures qui peuvent éventuellement s’avérer mortelles. Attention Indique un danger. Attire l’attention sur une utilisation qui pourrait engendrer une blessure personnelle et/ou être préjudiciable au produit. Remarque Indique les informations essentielles à la manipulation de l’instrument ou qui doivent être prises en compte afin de vous familiariser avec les procédures d’utilisation et/ou l es fonctions de l’instrument.
  • Page 7 électriques, ou un préjudice au produit, risquent de survenir. Fils de test et câbles de dérivation • Utilisez les produits fournis par Omega Engineering pour ce dispositif. • N'utilisez pas de fils de test ou de câbles de dérivation dégradés ou endommagés. Vérifiez la continuité des fils de test et des câbles de dérivation.

  • Page 8: Table Of Contents

    Contents . Overview ......................8 2. Operating Environment ..................9 3. Specifications .................... General Specifications ................ .2 Accuracy .................... . Operation ......................6 Precautions before Measurement ............6 .2 Components ................... 7 . Measuring Instructions ................2 .. AC Voltage Measurement ( ) ........22 ..2 DC Voltage Measurement ( V,...
  • Page 9 .6 Setup Function ..................0 .6. Turning the Buzzer On and Off ..........0 .6.2 SENSOR Mode Input, Display, and Unit Settings .... .6. Current Span Setting for the 00 mA Range for DCmA Measurement ..........2 .6. Setting the Slow Step Time ............ .6. Returning the Settings to Their Factory Default Values .. Additional Power-on Functions .............  .7. Making All the LCD Elements Appear ........ . User Calibration Function .................  . Calibrating Measurements .............. 5.1.1 Peak Hold Calibration .

  • Page 10: Overview

    1. Overview • Display Main display: -digit LCD, Subdisplay: -digit LCD (Measured values other than current values are displayed with  digits.) • Various Functions Measurement Functions DC voltage, AC voltage, DC current (2 V loop power supply possible), resistance, frequency, continuity check, and diode test Output Functions DC current (constant output, current sweep output, and SIMULATE (SINK) function) Additional Functions Data hold (D•H); auto hold (A•H); peak hold (P•H); auto range (Auto); range hold (Range Hold); maximum, minimum, and average value recording and measurement; zero adjustment (Ω); relative measured value display (RELΔ, REL%); and backlight •...

  • Page 11: Operating Environment

    2. Operating Environment WARNING ■ Measurement Category of CA450 and Lead cables There are restrictions on the maximum voltage level at which the CA0 can be used. These restrictions are based on the measurement categories specified by the safety standards. AC/DC 000 V for CAT.III, AC/DC 600 V for CAT.IV The terminals for current measurement and output and the accessory lead cables fall under category I. Do not use the above terminals and lead cables for measuring points that fall under measurement categories II, III, or IV. ■ Category of Test leads With Caps: 000V 0A CAT.III/600V 0A CAT.IV...
  • Page 12 Note Radiation immunity affects electrical performance (accuracy) under the conditions in EN626- and EN626-2-2. The use of this instrument is limited to domestic, commercial, and light industry applications. The instrument may malfunction if it is exposed to strong electromagnetic interference from nearby devices.

  • Page 13: Specifications

    3. Specifications 3.1 General Specifications Measurement functions: DC voltage, A C voltage, DC current, resistance, frequency, continuity check, diode test Additional functions: D ata hold (D•H); auto hold (A•H); peak hold (P•H); auto range (Auto); range hold (Range Hold); maximum, minimum, and average value recording and measurement; zero adjustment (Ω); relative measured value display (RELΔ, REL%); 24 V loop power supply; internal resistor on/off for HART communication Output functions: 2 0 mA DC current for current output SOURCE and current output...
  • Page 14 Insulation resistance: 100 MΩ or greater at 1000 VDC Withstand voltage: 6.88 kVAC for five seconds (between the input terminals and the case) External dimensions: Approx. 90 (W) × 192 (H) × 49 (D) mm Weight: Approx. 600 g (including the batteries) Compliant standards: Safety standards: EN600- and EN600-0 Measurement Categories: 000 V CATIII, 600 V CATIV F or current measurement and output: 8 V max, 00 mA max CAT I...

  • Page 15: Accuracy

    3.2 Accuracy Standard test conditions (1) Ambient temperature: 23°C ± 5°C (2) Relative humidity: 45% to 75% RH (no condensation) () Orientation: Horizontal or standing (4) External magnetic fields: Terrestrial magnetic field only * E ach of the response times indicates the time it takes for the accuracy to fall within the specified range. Accuracy: ± (% of reading + digits) DC Voltage Measurement Maximum Input Range...
  • Page 16 DC Current Measurement Range Resolution Accuracy Voltage Drop 0 mA 0.00 mA 0.05%+2 < 0.3 V 00 mA* 0.0 mA 0.05% + 2 < 0.8 V *1 Only the 30 mA range can be used during LOOP POWER output. Response time: Within  second Resistance Measurement Ω Maximum Input Open-Loop Range Resolution...
  • Page 17 Frequency Measurement in Hz AC Coupling Range Resolution Accuracy Input Voltage Range 0.00 Hz to 99.99 Hz 0.0 Hz 0. to 600 Vrms 90.0 Hz to 999.9 Hz 0. Hz 0.005% + 1 0.900 Hz to 9.999 kHz 0.00 kHz 0. to 600 Vrms Peak Hold (P•H) Measurement Function Accuracy Minimum Detection Width ±100 digits >6 ms DC Output Range Resolution Accuracy Load Condition SOURCE 0 to 20 mA Compliance voltage 28 V SIMULATE (SINK) 0 to 20 mA 20 mA 0.00 mA 0.05% of range External power supply  to 8 V overrange up to 2 mA...

  • Page 18: Operation

    4. Operation 4.1 Precautions before Measurement ■ Checking the Contents of the Package After receiving the product and opening the package, check the items described below. If the wrong items have been delivered, if items are missing, or if there is a problem with the appearance of the items, contact your nearest Omega Engineering. ■ Operation and Storage Precautions CAUTION • When inserting the batteries into the instrument, refer to section 7., “Replacing the Batteries.” • There is a blank cover on the upper part of the back casing. Only remove it when connecting the USB adapter of the communication package (sold separately). • Do not use the instrument near devices that produce high levels of noise or in areas subject to sudden changes in temperature. Doing so may result in unstable readings and errors. Cleaning • Do not wipe the instrument using benzine, paint thinner, or any other solvent (chemical). Doing so may lead to discoloration and other problems. Use a dry cloth to clean the instrument. Storage • Do not leave the instrument exposed to direct sunlight or in a hot and humid location,...

  • Page 19: Components

    4.2 Components • Panel description • Test leads Display (LCD) SHIFT key MIN/MAX key RANGE key HOLD key LIGHT key SELECT key RELΔ/% key Hz key Function switch Input and output terminal area Black With Caps: 1000V 10A CAT. /600V 10A CAT. Without Caps: 1000V 10A CAT.
  • Page 20 ) Function switch Use this switch to turn the power on and off and to select the measurement mode. Function Mode Function Mode Turns the CA0 off. Continuity check AC voltage measurement and V / Hz DC current measurement frequency measurement DC current output DC voltage measurement Constant current output DC/AC voltage measurement DC current output mV / in mV SENSOR Current sweep output and various SENSOR modes Resistance measurement DC current measurement Ω / Loop power supply Diode test LOOP POWER If test leads or lead cables are connected to the current measurement and output terminals, you cannot turn the function switch to the OFF position.
  • Page 21 Data hold: T he currently displayed measured values are held. “D•H” appears on the display. Auto hold: T he measured values are automatically held according to the operation of the test leads. “A•H” appears on the display. Peak hold: The peak values are held. “P•H” appears on the display. ) LIGHT key Use this key to turn the backlight on and off. Press the key once to turn it on. Press it again to turn it off.
  • Page 22 Display (LCD) Description Symbol or Unit Description Appears during DC measurement or output Appears during AC measurement Appears when the polarity is negative (minus) Appears during diode test mode Appears during continuity check mode Appears when relative values are being displayed Indicates that the measurement range is set to fixed Indicates that the measurement range is set to auto Indicates the present range Appears when data hold is enabled Appears when auto hold is enabled Appears when peak hold is enabled Appears when the MIN, MAX, and AVG values are being measured Appears when the MAX value is being displayed Appears when the MIN value is being displayed Appears when the AVG value is being displayed Appears when user calibration is being performed Appears when the auto power-off function is enabled Appears during rms value detection Appears when SHIFT has been pressed Shows the main value Shows the input or output value A converted value is shown in SENSOR mode Indicates the main unit Indicates the subunits Shows the MIN, MAX, and AVG recording time Shows the input voltage unit in SENSOR mode Shows the subvalue Shows the MIN, MAX, and AVG recording time...

  • Page 23: Measuring Instructions

    Appears when the range has been exceeded Appears when the battery voltage is low Appears during current output Shows the current sweep output or step output status Appears during slow linear output Appears during fast linear output Appears during slow step output Appears during fast step output Appears in loop power supply mode Appears when the internal resistor for HART communication is Appears in SPAN check mode Appears when the SIMULATE operation is being performed Appears in SENSOR mode 4.3 Measuring Instructions WARNING To avoid damaging the instrument and other equipment: • Before you start measuring, make sure that the position of the function switch and position of the input terminals for connecting the test leads or lead cables are appropriate for the desired mode of measurement. (Check that they are appropriate for the measurement category.) • Before you turn the function switch, remove the test leads or lead cables from the circuit under measurement. • Before you use this instrument or use its indications as a reference for further procedures, make sure that the instrument functions properly when used with a known power supply.

  • Page 24: Ac Voltage Measurement ( , )

    4.3.1 AC Voltage Measurement ( ) Turn the function switch to the “ V” or “mV” position. 2) If you turned the function switch to “mV,” press SELECT. (“~” is displayed.) ) Insert the test leads into the input terminals. ) Connect the test leads to the circuit under measurement, and Test leads then read the value when it stabilizes. Black Red 4.3.2 DC Voltage Measurement ( ) Turn the function switch to the “ V” or “mV” position. 2) Insert the test leads into the input terminals. ) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes. Test leads Black Red Note If the mV or range setting is selected and the test leads are not connected to a circuit, the instrument will still display a value, but measurement will not be adversely affected.

  • Page 25: Resistance Measurement (Ω)

    DC SENSOR range AC SENSOR range ) Connect the sensor that you will use to the input terminals. ) Read the value when it stabilizes. To return to normal mV measurement, press SHIFT+SELECT again. Example of measurement when connecting a current clamp sensor with an input-to-output ratio of 0 mV/A Use the setup function (see section 4.6) to configure the following settings. Instrument input voltage: 0.0 (mV) Converted value, decimal place: 0.00 Unit: A If you connect the sensor after configuring the above settings, the current clamp sensor’ s output voltage (in mV) appears in the subdisplay, and the current detected by the current clamp sensor appears in the main display. (You can read the values directly.) 4.3.4...

  • Page 26: Continuity Check

    Note Zero adjustment for resistance We recommend that you perform zero adjustment to obtain accurate measurements. After you perform steps  and 2 above, short the test leads, and press the REL key. (When zero adjustment is performed, the instrument will show a reading of 0.0 Ω.) The zero adjustment value is used until the power is turned off. 4.3.5 Continuity Check ( CAUTION To avoid damaging the instrument: Before measurement, turn off the circuit under measurement so that no voltage is applied. ) Turn the function switch to the “ ” position. 2) Insert the test leads into the input terminals. ) Connect the test leads to the circuit under measurement whose continuity you want to check.
  • Page 27 Forward-Bias Diode Test Connect the black test lead to the cathode, and connect the red test lead to the anode. For a silicon diode, the reading should be approximately 0. V. For an LED, the reading should be approximately . V to 2.0 V. Reverse-Bias Diode Test Connect the black test lead to the anode, and connect the red test lead to the cathode. Normally, “OL” appears. If a voltage value appears, the diode is defective. Test leads Test leads Black Black Figure 1 Forward-bias test Figure 2 Reverse-bias test...

  • Page 28: Dc Current Measurement

    4.3.7 DC Current Measurement ( WARNING To avoid damaging the instrument and other equipment: • Before you start measuring, make sure that the position of the function switch and position of the input terminals for connecting the test leads are appropriate for the desired mode of measurement. The maximum input current for mA measurement is 0 mA. ) Turn the function switch to the “ ” position. 2) Connect the black test lead to the COM input terminal, and connect the red test lead to the input terminal. ) Connect the test leads to the circuit under measurement, and then read the value when it stabilizes. Test leads Press the RANGE key to select a range. Black Subdisplay (percentage of span) Subdisplay (percentage of span) When the range is 4 to 20 mA...

  • Page 29: Loop Power Measurement

    Subdisplay for the 100 mA Range Subdisplay for the 00 mA Range Input Current Value (Main display) 0 to 00 mA 0 to 0 mA 0 to 0 mA -0.00 mA -110.0% -300.0% -220.0% 0.00 mA 0.0% -25.0% 0.0% 0.00 mA 10.0% 0.0% 20.0% 0.00 mA 50.0% 100.0% 100.0% 00.00 mA 100.0% 225.0% 200.0% 0.00 mA 110.0% 250.0% 220.0% The displayed value varies depending on the setting (0-00mA, 0-0mA, or 0-0mA) made in section .6, “Setup Function.” 4.3.8 Loop Power Measurement You can use this function to measure the current that flows when a constant voltage of 24 VDC is applied.

  • Page 30: Frequency Measurement (Hz)

    ) Turn the function switch to the “ LOOP POWER” position. (“LOOP POWER” appears on the display.) A constant voltage of 24 VDC is output between the “SOURCE(+)” and “SOURCE(-)” measurement terminals. 2) Connect the red test lead to “SOURCE(+)” and the black test lead to “SOURCE(-).” ) Connect the test leads to the circuit under measurement, and then read the values when they stabilize.

  • Page 31: Auto Hold Function

    4.3.10 Auto Hold Function The CA0 can automatically detect measured values and hold them according to the operation of the test leads. ) During normal measurement, press the HOLD key twice to select “A•H.” (“A•H” appears on the display.) 2) Connect the test leads to the circuit under measurement. ) When the measured value stabilizes, the buzzer makes a beeping sound. ) Remove the test leads from the circuit under measurement. ) The measured value display is held down. While “A•H” is displayed, you can repeat steps 2 through  as often as you want. Note • You cannot use this function during DCmV or ACmV measurement (this includes SENSOR mode), frequency measurement, or during a continuity check. • You cannot use this function at the same time as the relative value display function or when the MIN, MAX, and AVG values are being recorded. • Unstable input signals (measured values) cannot be held. 4.3.11 Peak Hold Function The CA0 always detects and updates the instantaneous peak value during DC voltage measurement (DCV). You can determine the peak value of a waveform. ) Set the function switch to 2) Connect the test leads to the circuit under measurement. 3) Press the HOLD key three times to select “P•H.” (“P•H”...
  • Page 32 REL key was pressed) /the peak value when the REL key was pressed × 100 (%) 3) To no longer show relative values, press REL Δ /% again. The “Δ” and “%” display disappear, and the CA450 returns to the normal peak hold mode.

  • Page 33: Relative Value Display (Rel Δ/%)

    Measured value – reference value Subdisplay value: Reference value Percentage Difference Display (REL%) The CA450 computes the value of (Measured value – reference value)/reference value and displays the result as a percentage. ) Measure (input) the reference value. 2) Press REL Δ/% to confirm the reference value. (“Δ” is displayed, and the range is held.) ) Press REL Δ...

  • Page 34: Min/Max/Avg Function

    4.3.13 MIN/MAX/AVG Function You can use this function to display the minimum (MIN), maximum (MAX), and average (AVG) values within the current measurement period. (In this display, the range is fixed.) The averaged value that is displayed is the total of the recorded data divided by the number of recorded values. When you press the MIN/MAX key, recording starts, and “MIN,” “MAX,” and “AVG” appear on the display. (The AUTO OFF function is disabled.) Recording Time The timer starts, and the time from the start of recording is displayed as well as the MIN/ MAX record update time. The recorded time display shows times in the range of 0 seconds to 99 minutes, 9 seconds in units of seconds. It shows times greater than 00 minutes in units of minutes. To stop recording, press the HOLD key. (“D•H” appears on the display.) Checking the Recording Time You can check the recorded data by pressing the MIN/MAX key to switch between the display of the current maximum (MAX), minimum (MIN), and average (AVG) values. To restart recording, press the HOLD key again. To disable the MIN/MAX/AVG function, hold down MIN/MAX for  second or longer. (“MAX,” “MIN,” and “AVG” disappear.) Note • While recording is stopped, removing the test leads does not affect the recorded data. • When an out-of-range input value is recorded, the minimum or maximum value is displayed as “OL,” and the average value data becomes inaccurate. • When you are measuring a widely fluctuating signal, set the range to contain the maximum and minimum values so that these values are not displayed as “OL.”...

  • Page 35: Output Instructions

    4.4 Output Instructions The CA0 can output DC current. There are two output modes. SOURCE mode: Current is supplied from the CA0. SIMULATE mode (SINK): T he CA0 sinks current from an external voltage source. There are two configuration modes. Constant current output: The specified current is output continuously. Current sweep output: T he output current is increased and decreased within the specified span. WARNING Do not apply a voltage of 8 V or greater to the output terminals. Doing so may lead to electric shock. Also, keep the voltage between the circuit and the ground below 8 V. Always use the attached lead cables and lead cables. (Check that they are appropriate for the measurement category.) CAUTION In modes other than SIMULATE mode, do not apply voltages to the output terminals. Mistakenly applying voltage to the output terminals could damage the internal circuitry.

  • Page 36: Constant Current Output (Source Mode)

    4.4.1 Constant Current Output (SOURCE mode) ) Turn the function switch to the “ ” position. After you turn the function switch, “OUTPUT” appears on the screen, and the output is set to 0% of the current span setting. (If you turn the function switch from the “ ” (current sweep) position to the “ ” position, the output value setting and SOURCE/SIMULATE setting are retained.) 2) If “SIMULATE” is displayed, press the SHIFT key. (“SIMULATE” disappears, the CA0 switches to SOURCE mode, and current output starts.) 3) Connect the lead cables to the positive (+) and negative (–) SOURCE terminals.
  • Page 37 Step Output Value  to 20 mA 0 to 20 mA (Subdisplay) -25% 0.000 mA — .000 mA 0.000 mA 8.000 mA .000 mA 2.000 mA 0.000 mA 6.000 mA .000 mA 100% 20.000 mA 20.000 mA 125% — 2.000 mA 131.2% 2.000 mA — For the method for setting the current span, see section .., “Current Span Setting.” Span Check Mode You can switch the output current between 20 mA and  mA (or 20 mA and 0 mA) using just the %STEP keys. When the range is 4 to 20 mA When you hold down %STEP▲...

  • Page 38: Constant Current Output (Simulate Mode)

    4.4.2 Constant Current Output (SIMULATE mode) When the SIMULATE (SINK) function is enabled, the CA450 can sink the specified amount of current from an external voltage source (such as a distributor) through the SIMULATE(+) terminal, and you can use the CA0 to simulate a two-wire system transmitter in a loop test. (You can connect the CA0 instead of a transmitter to test a transmitter or signal conditioner.) CAUTION • When sinking 20 mA from an external power source, keep the voltage within the range of  to 8 V.

  • Page 39: Current Sweep Output

    ) Just as in SOURCE mode, use the output setting keys to set the sink current value. (To enter span check mode, hold down %STEP▲ or %STEP▼ for one second or longer.) ) Connect the lead cables to the circuit under test. Press the SHIFT key again. “SIMULATE” disappears, and the CA450 returns to constant current output (SOURCE) mode. • If the set current is 0. mA or more and the terminals are open, “-----” appears in the main display, and “----” appears in the subdisplay. 4.4.3 Current Sweep Output You can make the output current (in SOURCE or SIMULATE mode) automatically fluctuate between 0% and 100% of the current span setting.
  • Page 40 Operation Mode Operation 0% to 100% to 0% in 40 seconds Slow 0% to 100% to 0% in 15 seconds Fast 0% to 100% to 0% in 25% steps Slow Each step is  to 60 seconds long.* 0% to 100% to 0% in 25% steps Fast Each step is  seconds long. Linear Mode Current Output Fast Slow...

  • Page 41: Current Span Setting

    4.4.4 Current Span Setting You can select one of the following two current spans. The following two percentage displays vary depending on the selected range: the output current value and the measured current value for mA measurement mode in the 0 mA range. Current Span Output Current and Measured Current (0 mA range) Notes When the display is 0% When the display is 100% Setting  to 20 mA .000 mA 20.000 mA Factory default 0 to 20 mA 0.000 mA 20.000 mA — You can use the following method to set (change) the current span. ) Turn the function switch to the “OFF” position, or put the CA0 into sleep mode. 2) While holding down the RANGE key, turn the function switch to any position. If the CA0 is in sleep mode, hold down the RANGE and LIGHT keys for 2 seconds or longer. ) After all the LCD elements appear and then disappear, release the key. ) After setting the current span, turn the function switch to the "OFF" position, or put the CA0 into sleep mode.

  • Page 42: Setup Function

    Restoring the Auto Power-Off Function When the function switch is set to OFF or when the CA0 enters sleep mode, the auto power-off function is restored. (When the power is turned on or when sleep mode is cleared, “AUTO OFF” appears.) 4.6 Setup Function You can use the setup function to:  Turn the buzzer on and off. 2 Configure SENSOR mode input, display, and unit settings.  Set the current range of the 00 mA range for DCmA measurement.  Set the slow step time.  Return the settings to their factory default values. 1) Press the SHIFT key. “Shift” appears on the display. 2) While “Shift” is displayed, press the LIGHT key to switch to setup mode. After “SEtUP” appears, the screen for turning the buzzer on and off appears.

  • Page 43: Sensor Mode Input, Display, And Unit Settings

    1) Press the LIGHT or SHIFT key to display “bEEP.” (Turn the buzzer on and off in the subdisplay. The initial setting is on.) :OFF HOLD 2) Use the ▲ (RANGE) and ▼ (REL) keys to select ON or OFF. 3) Press the HOLD key to save the setting. (After “SEt” appears, “bEEP” will appear again.) ) To return to normal measurement from setup mode, hold down the LIGHT key for  second or longer.

  • Page 44: Range For Dcma Measurement

    Settings Subdisplay value: 000.0 to 999.9 Main display value: 0000 to 9999 Main display decimal place: XXXX, X.XXX, XX.XX, or XXX.X Main display unit: A, mA, μA, °C, MΩ, kΩ, Ω, kHz, Hz, μF, nF, %, lx, no unit, V, or mV Example Display For a current clamp sensor with an input-to-output ratio of 0 mV/A, 66 A set the subdisplay to 0.0 mV, and set the main display (value, decimal place, and unit) to 0.00 A. Input 10 mV 660 mV With these settings, a maximum input of 660.0 mV will be displayed as 66.00 A. 4.6.3 Current Span Setting for the 100 mA Range for DCmA Measurement When you select the 00 mA range in DCmA measurement mode ( ), you can change the...

  • Page 45: Setting The Slow Step Time

    4.6.4 Setting the Slow Step Time If you select slow step mode for current sweep output, you can select the hold time (in seconds) of each step. 1) Press the LIGHT or SHIFT key to display “t.Int.” HOLD 2) Use ▲ (RANGE) and ▼ (REL) to select 15s, 30s, 45s, or 60s. 3) Press the HOLD key to save the setting. (After “SEt” appears, “t.lnt” will appear again.) ) To return to normal measurement from setup mode, hold down the LIGHT key for  second or longer.

  • Page 46: Additional Power-On Functions

    4.7 Additional Power-on Functions Hold one of the keys below, and turn the function switch from OFF to any position to configure various functions. (If the CA450 is in sleep mode, hold down one of the keys below and the LIGHT key for 2 seconds or longer to configure various functions.) Configured Function Details RANGE Current output and measurement (0 mA range) span...

  • Page 47: User Calibration Function

    Calibration Conditions Reference device: Use a reference device that fully satisfies the accuracy of the CA450. DC voltage and current generator or digital multimeter (DMM) Environment: Temperature: 23 ± 5°C, Humidity: 45 to 75% RH (no condensation) B efore you perform calibration, leave the CA0 in the environment described above for 0 minutes or more.
  • Page 48 4) Press the Hz key to confirm the value. Press the calibration confirmation key after the reference device’s value stabilizes. ) To calibrate other ranges, press the RANGE key to switch the range, check the function switch and the input terminals, refer to table , and perform steps  and  again. To perform peak hold and loop power calibration, see section 5.1.1, “Peak Hold Calibration,” and section 5.1.2, “LOOP POWER calibration.” 6) To end calibration, turn the function switch off.

  • Page 49: Peak Hold Calibration

    5.1.1 Peak Hold Calibration ) In calibration mode (when the “CAL” segment is displayed), turn the function switch to the V position. 2) Press the HOLD key to enable peak hold mode. ) Use the test leads to connect the CA0 to the reference device. ) From the reference device, apply the value under ZERO in Table 2. The calibration point appears in the subdisplay. You can clear the peak value by pressing the MIN/MAX key. 5) Press the Hz key to confirm the value. 6) From the reference device, apply the value under Full Scale in Table 2. The calibration point appears in the subdisplay. You can clear the peak value by pressing the MIN/MAX key. 7) Press the Hz key to confirm the value. 8) To end calibration, turn the function switch off.

  • Page 50: Calibrating Output

    Connection Diagram (Loop power) Digital multimeter Load Calibration mode (DMM) 510 Ω/1 W H (V) Subdisplay LOOP POWER 3.0000 V Calibration 100 Ω point Main display -30.000 mA Measured value DC voltage and Black current generator LOOP POWER (Sink function) 5.2 Calibrating Output Subdisplay Fourth decimal place...
  • Page 51 4) Use %STEP▲, %STEP▼, COARSE▲, and COARSE▼ to adjust the value that appears in the main display and the subdisplay so that it is the same as the value read by the multimeter connected to the CA0. You can use %STEP▲ and %STEP▼ to adjust the second decimal place (values above the second decimal place are also affected), and you can use COARSE▲ and COARSE ▼...

  • Page 52: What To Check After Calibration

    DC voltage and current generator SIMULATE SOURCE (SINK) 5.3 What to Check after Calibration After you have finished calibrating the CA450, make sure (through inspection) that the calibration has been performed correctly and that the calibration values have been saved to the memory. Inspection Method After calibration has finished, turn off the CA450. Then, turn on the CA0, and check the calibration in the normal output and measurement modes (not calibration mode).

  • Page 53: Communication

    6. Communication You can configure the CA450 and check its settings, measured values, and other information from a PC. Note Through the use of a communication adapter, the CA450 can communicate with a PC through USB. 6.1 Cable Connection and Interface Specifications Cable Connection Remove the blank cover on the back of the CA0, and connect a USB adapter.
  • Page 54 6.2 Communication Commands Item Command Description Normal Cal. Data Outputs measured values   acquisition Measurement Queries the measurement function  Î Sets or queries the measurement range   settings Sets or queries the measured-value-display   hold function Sets or queries SENSOR mode ...
  • Page 55 Item Command Description Normal Cal. Calibration Sets or queries whether the mode is normal   mode or calibration mode Queries the calibration item Î  Sets the calibration point Î  Queries the measurement mode being Î  calibrated Confirms the measurement calibration value Î...
  • Page 56 Command = AS?<CRLF> -> Return = ASm<CRLF> Parameters m = 0: SOURCE (default) 1: SIMULATE (SINK) This command returns ERR13 when the CA450 is in constant current output mode or current sweep output mode. Sets or queries whether the backlight is on or off Normal Cal.
  • Page 57 In output calibration mode, the current output settings are used as the output calibration values for the currently selected function, range, and calibration point (+FS, +5%, -FS, or -5%). If the CA450 is in a measurement mode, ERR13 is returned. Queries the calibration item Normal Cal.
  • Page 58 10: Diode test 11: Continuity check 12: DCmA 13: LOOP POWER If the CA450 is in constant current output, current sweep output, or continuity check function, ERR13 is returned. Sets the calibration point Normal Cal. Command = CPm<CRLF> -> Answer = CPm<CRLF>...
  • Page 59 In measurement calibration mode, the current measured values are used as the measurement calibration values for the currently selected function, range, and calibration point (+FS or +0). If the CA450 is in an output mode, ERR13 is returned. Queries the output mode being calibrated Normal Cal.
  • Page 60 Decreases the output value by one step (25%). Sets the output value to 0% of the span in span check mode. If the CA450 is in any mode other than constant current output mode, ERR13 is returned. Decreases the m digit of the output value by 1 Normal Cal.
  • Page 61 ESC S Outputs the status byte Normal Cal. ( "ESC" = ASCII 0x1B ) Command = ESC S<CRLF> -> Answer = m<CRLF>   Outputs the status byte (as a decimal number). See section 6.6, “Status Byte Format.” Sets or queries whether a header is attached to the output data Normal Cal.
  • Page 62 2: Auto hold 3: Peak hold • If the CA450 is in an output mode, ERR13 is returned. • During MIN/MAX measurement, if HD1 is sent, recording and the updating of the display of the elapsed time are stopped. If HD0 is sent, recording and the updating of the display of the elapsed time are resumed.
  • Page 63 Command = IOm<CRLF> -> Answer = IOm<CRLF>  Î Command = IO?<CRLF> -> Return = IOm<CRLF> Parameters m = 0: 250 Ω resistor off (default) 1: 250 Ω resistor on If the CA450 is in any mode other than loop power measurement mode, ERR13 is returned.
  • Page 64 Command = MHm<CRLF> -> Answer = MHm<CRLF>  Î Command = MH?<CRLF> -> Return = MHm<CRLF> Parameters m = 0: ACV measurement (default) 1: Frequency measurement If the CA450 is in any mode other than ACV mode, ERR13 is returned.
  • Page 65 Parameters m = 0: MIN/MAX/AVG recording is disabled (default) 1: MIN/MAX/AVG recording starts If the CA450 is in an output mode, ERR13 is returned. Sets or queries the span setting for the 100 mA range for Normal Cal. DCmA measurement Command = MPm<CRLF>...
  • Page 66 Sets or queries the measurement range Normal Cal. Command = MRm<CRLF> -> Answer = MRm<CRLF>   Command = MR?<CRLF> -> Return = MRm<CRLF> Parameters [DCV] m = 1: 6 V 3: 60 V 4: 600 V 5: 1000 V [DCA] m = 0: 30 mA 1: 100 mA...
  • Page 67 Outputs measured values Normal Cal. Command = OD<CRLF> -> Return = abbcsddddddeee<CRLF>   Parameters Header (4 bytes)* a = V: voltage, A: current, O: resistance, T: temperature, F: frequency, S: SENSOR mode bb = DC: direct current, AC: alternating current, R3: resistance measurement c = N: normal, O: overrange, E: no data, B: burnout * The header will not appear if you specify 0 (no header) in...
  • Page 68 Outputs setup data Normal Cal. Command = OS<CRLF> -> Return = Measure a<CRLF>  Î Function b<CRLF> Range c<CRLF> Source d<CRLF> Function e<CRLF> Range f<CRLF> Data g<CRLF> 24V Output h<CRLF> Light i<CRLF> Charge j<CRLF> Parameters a (measurement) = ON or OFF b (measurement function) = DCV, OHM, FREQ, ACV, DCmV, ACmV, DIODE, CONTINUITY, DCmA, LOOP POWER...
  • Page 69 Command = RG?<CRLF> -> Return = RGm<CRLF> Parameters m = 0: Auto range (default) 1: Range hold When the CA450 is in an output mode or DCmV, ACmV, diode test, or continuity check mode, ERR13 is returned. Sets or queries the RELΔ/% display Normal Cal.
  • Page 70 Î Command = SD?<CRLF> -> Return = SDm<CRLF> Parameters m (output value) = 0.000 to 25.000 If the CA450 is in a measurement mode, ERR13 is returned. Queries the output function Normal Cal. Command = SF?<CRLF> -> Return = SFm<CRLF>...
  • Page 71 Command = SM?<CRLF> -> Return = SMm<CRLF> Parameters m = 0: SENSOR mode is disabled (default) 1: SENSOR mode is enabled If the CA450 is in a mode other than DCmV or DCmA mode, ERR13 is returned. Sets or queries SPAN check mode Normal Cal.
  • Page 72 If you select slow step mode for current sweep output, this command sets or queries the hold time of each step. If the CA450 is in an output mode, ERR13 is returned. Sets or queries the converted value for SENSOR mode Normal Cal.
  • Page 73 = 1 to 5 (1 is the least significant digit while 5 is the most significant digit) If the CA450 is in any mode other than constant current output mode, ERR13 is returned. If the CA450 is in span check mode, ERR13 is returned.

  • Page 74: Detailed Command Descriptions

    ERR12 The parameter specification for the command is incorrect. ERR13 A command has been received that cannot be executed because of the status of the CA450. ERR16 An error was detected during calibration. ERR20 Error in the power supply for LOOP POWER measurement ERR23 The output current or voltage has exceeded its limit.

  • Page 75: Communication Command Validity Table

    6.5 Communication Command Validity Table Measurement Output Constant Current Sweep Command Normal RELΔ/% MIN/MAX Cal. SETUP Current Output Output Normal Cal. Normal Cal. Î Î Î Î Î  Î      Î   Î  Î...
  • Page 76   Î Î Î Î Î  Î Î Î Î Î Î Î Î  Î Î Î There are communication commands that may not be executable depending on the selected mode and the status of the CA450.

  • Page 77: Status Byte Format

    6.6 Status Byte Format Status byte format (see the explanation of the ESC S command) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 LOOP Output Output POWER Syntax Measurement Overrange adjustment (fixed) (fixed) error supply error completion error bit7: Fixed at 0 bit6: Fixed at  bit:...

  • Page 78: Replacing The Batteries And Fuses

    7. Replacing the Batteries and Fuses 7.1 Replacing the Batteries When the battery voltage falls below the operating voltage, appears on the display. Follow the procedure below to replace the batteries. WARNING • To avoid electrical shock, be sure to disconnect the CA0 from the circuit under measurement. (Remove the test leads and lead cables as well.) • Turn the CA0 off. • Do not measure while the case is open. Doing so may lead to electric shock. CAUTION • Do not mix different types of batteries or mix old batteries with new batteries. • Insert the batteries with their polarities in the directions indicated by the holder. Replacement Procedure ) Remove the fastening screw on the back of the CA0’s case. 2) Open the case. ) Replace each of the four batteries with a new battery. ) Return the case to its original position, and tighten the fastening screw. Blank cover (USB adapter attachment position) Battery slots Screw position...

  • Page 79: Replacing The Fuses

    During current range measurement, the fuses may melt (blow out) because of excessive current. If this happens, replace the fuses. WARNING • To avoid electrical shock, be sure to disconnect the CA0 from the circuit under measurement. (Remove the test leads and lead cables as well.) • Turn the CA0 off. • Do not measure while the case is open. Doing so may lead to electric shock. • To avoid damaging the CA450, be sure to use the specified fuses. Fuse specifications (rating and maker): F and F2 (0 mA/000 V, Littlefuse, FLU .0) Replacement Procedure ) Remove the fastening screw on the back of the CA0’s case. 2) Open the case. ) Remove the fuses from their holders. ) Insert the new fuses into the holders. (Check the ratings of the fuses.) ) Return the case to its original position, and tighten the fastening screw.

  • Page 80: Calibration And After-Sales Service

    8. Calibration and After-Sales Service For a calibration or after-purchase servicing, contact Omega Engineering. Calibration To use the CA0 properly, we recommend that you calibrate it regularly. (Refer to the information about the user calibration function.) Recommended calibration period:  year 9. Disposing This Product 9.1 Disposing This Product Waste Electrical and Electronic Equipment (WEEE), DIRECTIVE 2002/96/EC (This directive is only valid in the EU.) This product complies with the WEEE Directive (2002/96/EC) marking requirement. The following marking indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category With reference to the equipment types in the WEEE directive Annex , this product is classified as a “Monitoring and Control Instrumentation” product.

  • Page 81: How To Replace And Dispose The Batteries

    9.2 How to Replace and Dispose the Batteries New EU Battery Directive, DIRECTIVE 2006/66/EC (This directive is only valid in the EU.) This is an explanation about the new EU Battery Directive (DIRECTIVE 2006/66/EC). This directive is valid only in the EU. Batteries are included in this product. When you remove batteries from this product and dispose them, discard them in accordance with domestic law concerning disposal. Take a right action on waste batteries, because the collection system in the EU on waste batteries are regulated. Battery type: Alkaline dry cell Notice: This is marking means they shall be sorted out and collected as ordained in ANNEX II in DIRECTIVE 2006/66/EC. How to remove batteries safely: For further details, see “7. Replacing the Batteries”.

  • Page 82: Troubleshooting

    • The settings that were specified with the setup is turned on. function are incorrect. Refer to section 4.6, “Setup Function,” to return the CA450 to its factory default settings. “Err61” or “Err62” appears when • The calibration data is incorrect. the power is turned on.

  • Page 83: Appendix  Fahrenheit

    Appendix 1 Fahrenheit The default temperature read-out of the Process Multimeter is in Celsius (°C). To change it to Fahrenheit (°F), it is necessary to proceed as follows: Changing the temperature unit setting to Fahrenheit SEE ALSO For more information on operation, see this manual. 4.3.3 Measuring Using Sensors (SENSOR) 4.6.2 SENSOR Mode Input, Display, and Unit Settings Displaying “...

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