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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.
)  Use the output value setting keys to set the output value.

Black

Red

Lead cables

Output Value 
Setting Key

Output Setting  
(Increase and decrease)

%STEP

*

▲ 1-step (25%) increase
▼ 1-step (25%) decrease

COARSE

▲ 0. mA increase
▼ 0. mA decrease

FINE

▲ 0.00 mA increase
▼ 0.00 mA decrease

*  For details about using the %STEP key, see “Output 

Values for Each Step” and “Span Check Mode.”

)  Connect the lead cables to the circuit under test.

Tip 

•  Because the CA0 outputs current in SOURCE mode, it consumes more 

current than in other modes. You can keep the current consumption down in 

SIMULATE mode.

•  Hold down the %STEP, COARSE, or FINE key to increase or decrease 

each digit consecutively.

Output Values for Each Step

You can press %STEP▲ or %STEP▼ to increase or decrease the output by one step (25%).
You can check the step value (as a percentage) in the subdisplay. (The output current 
appears in the main display.)

Содержание CA450

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

Страница 2: ...e 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 n...

Страница 3: ...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 shoc...

Страница 4: ...essential for handling the instrument or should be noted in order to familiarize yourself with the instrument s operating procedures and or functions Tip This indicates supplemental information for ex...

Страница 5: ...ent When you remove the case for example to change the batteries be sure to remove the test leads and lead cables from the instrument There are caps at the ends of the test leads To ensure safety safe...

Страница 6: ...ises en compte afin de vous familiariser avec les proc dures d utilisation et ou l es fonctions de l instrument Conseil Ce qui suit indique des informations suppl mentaires pour les explications Dange...

Страница 7: ...ils de test et les c bles de d rivation du circuit en cours de mesure Lorsque vous enlevez le bo tier par exemple pour changer les batteries veillez retirer les fils de test et les c bles de d rivatio...

Страница 8: ...22 4 3 4 Resistance Measurement 23 4 3 5 Continuity Check 24 4 3 6 Diode Test 24 4 3 7 DC Current Measurement 26 4 3 8 Loop Power Measurement 27 4 3 9 Frequency Measurement Hz 28 4 3 10 Auto Hold Fun...

Страница 9: ...k Hold Calibration 47 5 1 2 Loop Power Calibration 47 5 2 Calibrating Output 48 5 3 What to Check after Calibration 50 6 Communication 51 6 1 Cable Connection and Interface Specifications 51 6 2 Commu...

Страница 10: ...Auto range hold Range Hold maximum minimum and average value recording and measurement zero adjustment relative measured value display REL REL and backlight Communication Optional PC communication se...

Страница 11: ...est leads With Caps 1000V 10A CAT III 600V 10A CAT IV Without Caps 1000V 10A CAT II 600V 10A CAT II Measurement Category Description Remarks I CAT I For measurements performed on circuits not directly...

Страница 12: ...accuracy under the conditions in EN61326 1 and EN61326 2 2 The use of this instrument is limited to domestic commercial and light industry applications The instrument may malfunction if it is exposed...

Страница 13: ...ent 25000 Frequency 19999 Other 6600 Subdisplay Displays supplemental information for various functions Polarity indicator Automatic display Only the minus sign appears Over range indicator OL Low bat...

Страница 14: ...15 mm peak value Duration 30 minutes Shock 1 m drop test as defined by the safety standards Altitude 2000 m or less EMC standards EN61326 1 Class B EN61326 2 2 EN55011 Class B Group 1 Influence of rad...

Страница 15: ...V 0 1 V 1000 V 1 V 0 1 1 NMRR 60 dB or more 50 60 Hz 0 1 CMRR 120 dB or more 50 60 Hz Rs 1 k Response time Within 1 second AC Voltage Measurement V mV AC coupling rms value detection sine wave Range R...

Страница 16: ...110 A 1 3 V 60 k 0 01 k 13 A 600 k 0 1 k 1 3 A 6 M 0 001 M 0 35 3 130 nA 60 M 0 01 M 1 2 2 1 The accuracy after ZERO CAL 2 For 40 M to 60 M the accuracy is 2 2 Response time Within 2 seconds for 600...

Страница 17: ...0 4 to 600 Vrms Peak Hold P H Measurement Function Accuracy Minimum Detection Width DCV 100 digits 6 ms DC Output Range Resolution Accuracy Load Condition 20 mA 0 001 mA 0 05 of range SOURCE 0 to 20...

Страница 18: ...sing 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...

Страница 19: ...SHIFT key MIN MAX key RANGE key HOLD key LIGHT key SELECT key REL key Hz key Function switch Input and output terminal area Red Caps of Test leads Black With Caps 1000V 10A CAT 600V 10A CAT Without Ca...

Страница 20: ...ssing this key you can select different measurement modes when the function switch is at the positions listed below You can switch out of the selected mode by pressing the key again mV mV position AC...

Страница 21: ...values using numbers or percentages 1 Difference display REL appears on the display 2 Percentage difference display REL and appear on the display Use this key during the zero adjustment of the resista...

Страница 22: ...bled 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 displaye...

Страница 23: ...ormed 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 p...

Страница 24: ...o a circuit the instrument will still display a value but measurement will not be adversely affected 4 3 3 Measuring Using Sensors SENSOR You can use this function to measure the output of a current s...

Страница 25: ...ce 01 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 s...

Страница 26: ...pplied 1 Turn the function switch to the position 2 Insert the test leads into the input terminals 3 Connect the test leads to the circuit under measurement whose continuity you want to check If the c...

Страница 27: ...pproximately 0 5 V For an LED the reading should be approximately 1 5 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...

Страница 28: ...en it stabilizes Press the RANGE key to select a range 30 mA range Main display Subdisplay percentage of span When the range is 4 to 20 mA 100 mA range Main display Subdisplay percentage of span When...

Страница 29: ...value varies depending on the setting 0 100mA 10 50mA or 0 50mA made in section 4 6 Setup Function 4 3 8 Loop Power Measurement You can use this function to measure the current that flows when a cons...

Страница 30: ...the display Press SELECT again to turn the internal resistor off Tip The loop power is supplied at the typical value of 24 VDC Depending on different conditions such as the loop current value or wheth...

Страница 31: ...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 M...

Страница 32: ...s held is displayed Main display value The current peak value the peak value when the REL key was pressed 2 Press the REL key again The unit changes to Main display value The current peak value the pe...

Страница 33: ...value current span setting 100 For measurement types other than DCmA Main display value Measured value reference value Subdisplay value Reference value Percentage Difference Display REL The CA450 comp...

Страница 34: ...nits of seconds It shows times greater than 100 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...

Страница 35: ...thin the specified span WARNING Do not apply a voltage of 48 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 48...

Страница 36: ...ue Black Red Lead cables Output Value Setting Key Output Setting Increase and decrease STEP 1 step 25 increase 1 step 25 decrease COARSE 0 1 mA increase 0 1 mA decrease FINE 0 001 mA increase 0 001 mA...

Страница 37: ...s 4 to 20 mA When you hold down STEP or STEP for 1 second or longer SPAN appears and the CA450 enters into span check mode In this mode the output switches to 100 when you press STEP and to 0 when you...

Страница 38: ...er source keep the voltage within the range of 15 to 48 V Set the polarity of the applied voltage as shown in the figure below and be careful not to apply voltage in the opposite direction Transmitter...

Страница 39: ...e automatically fluctuate between 0 and 100 of the current span setting 1 Turn the function switch to the position After you turn the function switch OUTPUT appears on the screen and the output starts...

Страница 40: ...to 60 seconds long Fast 0 to 100 to 0 in 25 steps Each step is 5 seconds long Linear Mode Current Output Output current Span 100 0 Time s 40 15 Slow Fast Step Mode Current Output Output current Span 1...

Страница 41: ...ges it to 0 to 20 mA If the current span was set to 0 to 20 mA this operation sets it to 4 to 20 mA The setting you make remains valid until you change it 4 5 Auto Power Off Sleep Function When the Au...

Страница 42: ...off appears 3 The setting to configure changes each time you press the LIGHT or SHIFT key 4 To change a setting use the RANGE and REL keys 5 To save confirm a setting press the HOLD key SEt appears th...

Страница 43: ...Press the LIGHT or SHIFT key to display the screen shown below The parameter that can be changed blinks Main display 1 Subdisplay 1 Subdisplay 4 Main unit Main decimal place Main display 4 Keep press...

Страница 44: ...select the 100 mA range in DCmA measurement mode you can change the current span 0 to 100 mA 10 to 50 mA or 0 to 50 mA Input Current Value Main display Subdisplay for the 100 mA Range 0 to 100 mA 10 t...

Страница 45: ...Default Values You can reset all the items that you have changed set in setup mode to their factory default values 1 Press the LIGHT or SHIFT key to display the screen for initialization which shows d...

Страница 46: ...CT All the LCD elements appear only while the SELECT key is pressed Section 4 7 1 HOLD The auto power off function is disabled Section 4 5 HOLD REL The calibration data is returned to its factory defa...

Страница 47: ...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 Before...

Страница 48: ...Keys other than RANGE and SELECT cannot be used Table 1 Calibration Table Measurements Function Range Calibration Point Input value AC voltage measurement 6 000 V 6 000 V 50 00 60 00 Hz 60 00 V 60 00...

Страница 49: ...value 8 To end calibration turn the function switch off Table 2 Calibration Table Peak Hold Function Range Calibration Point Input value Condition ZERO Full Scale DCV peak hold 6 000 V 0 V 6 000 V 5...

Страница 50: ...al place Main display Up to the third decimal place Fourth decimal place Second decimal place Perform calibration according to Table 4 1 While holding down the SELECT and RANGE keys turn the function...

Страница 51: ...main display and the subdisplay so that it is the same as the value read by the multimeter connected to the CA450 You can use STEP and STEP to adjust the second decimal place and you can use COARSE an...

Страница 52: ...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...

Страница 53: ...mmunication 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 CA450 and connect a USB...

Страница 54: ...the MIN MAX AVG function CC Sets or queries whether the measurement mode is DCmV or ACmV DC sensor or AC sensor in SENSOR mode RG Sets or queries the auto range and range hold settings Output setting...

Страница 55: ...or data OS Outputs setup data ESC C RC Initializes setup data ESC S Outputs the status byte H Sets or queries whether a header is attached to the output data OD IM Sets or queries whether the bits in...

Страница 56: ...ns Normal The command can be used during normal measurement and output Cal The command can be used during user calibration see chapter 5 The other conditions for each command are listed in section 6 5...

Страница 57: ...e m 0 DC sensor measurement default 1 AC sensor measurement If the measurement mode is neither DCmV nor ACmV ERR13 is returned CD Confirms the output calibration value Normal Cal Command CD CRLF Answe...

Страница 58: ...nt output current sweep output or continuity check function ERR13 is returned CP Sets the calibration point Normal Cal Command CPm CRLF Answer CPm CRLF Parameters m 0 FS calibration 1 Peak hold zero c...

Страница 59: ...ues for the currently selected function range and calibration point FS or 0 If the CA450 is in an output mode ERR13 is returned CSF Queries the output mode being calibrated Normal Cal Command CSF CRLF...

Страница 60: ...the CA450 is in any mode other than constant current output mode ERR13 is returned DW Decreases the mth digit of the output value by 1 Normal Cal Command DWm CRLF Answer DW OK CRLF Parameters m 1 to...

Страница 61: ...rmat H Sets or queries whether a header is attached to the output data OD Normal Cal Command Hm CRLF Answer Hm CRLF Command H CRLF Return Hm CRLF Parameters m 0 header default 1 Header The changed set...

Страница 62: ...t 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...

Страница 63: ...o 63 1 bit0 measurement completion is detected 2 bit1 output adjustment completion is detected 4 bit2 syntax error is detected 8 bit3 overrange is detected 16 bit4 24 V loop output error is detected 3...

Страница 64: ...s disabled ERR13 is returned MF Queries the measurement function Normal Cal Command MF CRLF Return MFm CRLF Parameters m 0 DCV 2 5 Hz 7 ACV 8 DCmV 9 ACmV 10 Diode test 11 Continuity check 12 DCmA 13 L...

Страница 65: ...recording starts If the CA450 is in an output mode ERR13 is returned MP Sets or queries the span setting for the 100 mA range for DCmA measurement Normal Cal Command MPm CRLF Answer MPm CRLF Command...

Страница 66: ...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 ACV m 0 6 V 1 60 V 2 600 V 3 1000 V m 0 600 1 6 k 2 60 k 3 600 k 4 6 M 5 60 M DCmV m 0 600 m...

Страница 67: ...not appear if you specify 0 no header in the H command Data Area 10 bytes s sign _ plus or minus _ represents a space dddddd measured value 6 digits eee E 0 E 3 E 3 E 6 E 6 For overrange no data and b...

Страница 68: ...V OHM FREQ ACV DCmV ACmV DIODE CONTINUITY DCmA LOOP POWER c measurement range 1000V 600V 60V 6V for DCV FREQ 600 mV for DCmV 600 mV for ACmV 60 MOHM 6MOHM 600kOHM 60kOHM 6kOHM 600OHM for OHM 2 V for d...

Страница 69: ...ies the auto range and range hold settings Normal Cal Command RGm CRLF Answer RGm CRLF Command RG CRLF Return RGm CRLF Parameters m 0 Auto range default 1 Range hold When the CA450 is in an output mod...

Страница 70: ...ERR13 is returned SI Sets or queries the input voltage value for SENSOR mode Normal Cal Command SIm CRLF Answer SIm CRLF Command SI CRLF Return SIm CRLF Parameters m input voltage value 0000 to 9999...

Страница 71: ...RLF Parameters m 0 SPAN check mode is disabled default 1 SPAN check mode is enabled When you switch to span check mode the previously output values are retained Change the output values using commands...

Страница 72: ...t mode ERR13 is returned ST Sets or queries the converted value for SENSOR mode Normal Cal Command STm CRLF Answer STm CRLF Command ST CRLF Return STm CRLF Parameters m converted value 0000 to 9999 4...

Страница 73: ...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...

Страница 74: ...rror in the power supply for LOOP POWER measurement ERR23 The output current or voltage has exceeded its limit ERR60 The saved setting data in the internal flash memory is not correct ERR61 The saved...

Страница 75: ...alidity Table Command Measurement Output Normal REL MIN MAX Cal SETUP Constant Current Output Current Sweep Output Normal Cal Normal Cal AS BL BZ CC CD CL CMF CP CS CSF CR CW DQ DI DW ESC C RS ESC S H...

Страница 76: ...l SETUP Constant Current Output Current Sweep Output Normal Cal Normal Cal OD OE OS RA RG RP SD SF SI SL SM SP SR SS ST SU SY UP UQ There are communication commands that may not be executable dependin...

Страница 77: ...til the status byte is read bit3 Becomes 1 if a measured value is outside of its limits overrange Becomes 1 if the CA450 switches to a higher range when auto range is enabled The data is held until th...

Страница 78: ...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...

Страница 79: ...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 F1 and F2 440 mA 1000 V Littlefuse FLU 440 Replacement Proc...

Страница 80: ...ical 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 indica...

Страница 81: ...is 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 s...

Страница 82: ...too low Check the external DCV power supply The output or measured values are strange Is it possible that the values are being affected by noise Control through the USB interface is not working Are t...

Страница 83: ...ode Input Display and Unit Settings Displaying C only is configured at factory before shipment Carry out the following setting procedure to display F While pressing the SELECT RANGE and HOLD keys simu...

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