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TECPEL CL-327A Manual

Process signals source
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Process Signals Source
1 Introduction
This process signals source (the calibrator in the following) is a handheld, battery-operated instrument that
sources electrical and physical parameters.
Features:
Source DC voltage, DC current, resistance, simulate Transmitter, TC, RTD, frequency, pulse and switch.
Others features:
Big LCD can display the TC/RTD measurement value and mV/Ω corresponding simultaneously; mA and
mA% simultaneously.
TC source terminals and built-in lead connector of same temperature (RJ compensation with
auto-reference joint point)
Manual step source and auto -step and sweeping –step source
Room temperature monitoring under any operation
2 Contact Us
To purchase parts, obtain operation help or address of the vendor or service center nearest to you, please call
us or visit our web (see the bottom page of the Manual).
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  • Page 1 Process Signals Source 1 Introduction This process signals source (the calibrator in the following) is a handheld, battery-operated instrument that sources electrical and physical parameters. Features:  Source DC voltage, DC current, resistance, simulate Transmitter, TC, RTD, frequency, pulse and switch. Others features: ...

  • Page 2: Standard Accessories

    Standard Accessories Make sure that the package contains all the accessories listed below. And if you find they are damaged or any of them is missing, please contact the vendor from which you purchased the product as soon as possible. Refer to the replacing part list in 15.3 in the Manual if you want to order the replacing parts.
  • Page 3 manual. Table 1 Explanations of International Electrical Symbols WARNING EARTH GROUND INFORMATION Warning To avoid possible electric shock or personal injury:  Do not apply more than the rated voltage, as marked on the calibrator, between terminals or between any terminal and earth ground;...
  • Page 4 meter inspect.  Do not operate this instrument in areas where inflammable or explosive gases or vapor exists. It is extremely hazardous to use the instrument under such environments;  Do not operate the meter around explosive gas, vapor, or dust; ...
  • Page 5 5 Familiar With the Calibrator Figure 1 Entire Graph Figure 2 Source Terminals...
  • Page 6 5.1 Source Terminals 5.2 Keys Figure 2 shows the source terminals of the calibrator. Figure 3 shows keys of the calibrator. Table 2 explains their use. Table 3 explains their use. Table 2 Source Terminals Terminal Function ① Source Signals：（+）DcmA Source Signals：（+）FREQ、PULSE、...
  • Page 7 Table 3 Functions of the keys Name Function Source value set key Increment of source set point 6~10 Source value set key Decrement of source set point Source START key Source auto-pulse number, turn on mA auto-stepping or sweeping function. Source ON key Turn on or off source function Power key...

  • Page 8: Display Screen

    value and room temperature; In others source function, press the key, convert the room temperature or display is close. Source RANGE Key Select source range Zero Key Set the source value to default. In pulse source function, set the pulse number. In DCmA source function ,select the auto-wave mode.
  • Page 9 g：Source function off h：Source DC voltage i： Source DC current j： Source TC k：Source RTD l： Source Pulse m：Set -point for source n：Unit of set -point for source o：Reference Junction Compensation On p：Types of TC source q：Types of RTD source r：DCmA 25%or 100% manual step source s：DCmA auto-stepping or sweeping source t：Source assistance districts...
  • Page 10 “Precautions for Safe Use of the Instrument.”  Do not open the instrument’s case. Contact the vendor from which you purchased the instrument, for a service of inspecting or adjusting the internal assembly.  In case of failure Should the instrument begin to emit smoke, give off an unusual odor, or show any other anomaly, immediately turn off the POWER key.

  • Page 11: Environmental Requirements

    Before cleaning the instrument’s case or operation panel disconnect the power cord plug from the wall  outlet if you are using an Charger. Use a soft, clean cloth soaked in water and tightly squeezed to gently wipe the outer surfaces of the instrument. Ingress of water into the instrument can result in malfunction. ...
  • Page 12 Note:  Use the instrument under the following environmental conditions if precise source or measurement is your requirement: Ambient temperature range: 23±5°C; Ambient humidity range: 20 to 80% RH(non-condensing)  When using the instrument within a temperature range of 0 to 18°C or 28 to 50°C, add a value based on the temperature coefficient shown in Chapter 18“Specifications”...
  • Page 13 electrodes correctly positioned.  Do not short-circuit the batteries.  Do not disassemble or heat the batteries or throw them into fire.  When replacing batteries, replace all of the four batteries at the same time with new ones from the same manufacturer.
  • Page 14 Low battery: The dictation flashes in sequence when getting charged. Note that the battery replacement indicator is driven by directly measuring the battery voltage when the calibrator is in actual operation. Consequently, the indicator may read differently depending on the battery load condition if the batteries are too low.
  • Page 15 Pressing the Power key once when the power is off turns on the calibrator. Pressing the Power key for 2 seconds turns off the calibrator. Turning On/Off the Backlight The LCD can be backlight. Pressing the key turns on the backlight, while pressing the key once again turns it off.
  • Page 16 component of the lead cables for source. Care must be taken therefore when drawing a load current since the voltage drop due to the resistance component (approximately 0.1 Ω on a round-trip basis) of the lead cables serves as an error. 7.1 Connecting Cables to Terminals For DC voltage, thermocouple (Figure 5) Step 1: Connect the black lead cable for source to the...
  • Page 17 Step 1: Connect black lead cables for source to the ‘’ΩRTD’’ terminal and the red lead cable to the “VTc” terminal. Step 2: Connect the other ends of the cables to the input of equipment under test while making sure the polarities are correct.
  • Page 18 Step 1: Using the 〔V〕 key to select DC voltage source function, select the desired range from 100mV, 1000mV, and 10V by pressing the〔RANG〕key. The default value and unit of the selected source function and range shall be displayed in the main districts part of the LCD. Step 2: Set the output value digit by digit using 〔〕/〔〕keys.
  • Page 19 the Maxim or Minimum value. Pressing the〔ZERO〕key initializes the output set point to the default value (0). Step 3: Pressing the 〔ON〕 key causes the indicator on the LCD to change from ‘’OFF‘’ to ‘’ON ‘’. The calibrator sources the preset DC current between the output terminals. Step 4: To turn off the output, press the〔ON〕key once again.
  • Page 20 mode and 20 seconds for auto-stepping mode. Step 1: In DC current function, press 〔 〕 key to display auto-stepping mode signal “ ” on the lower part of the screen, and press once again to display auto-sweeping mode signal “ ”.The default source value will be showed simultaneously.

  • Page 21: Sourcing Resistance

    100(current output value mA-4mA) mA %= 16 mA Tips: Press the (T.DISP) key, assistance districts converts the room temperature. 7.3.4 4-20 mA simulate transmitter source Connect the calibrator and the loop power as listed in Figure 9, and operate in steps shown in sourcing DC current.
  • Page 22 proportional to the preset resistance R between the output terminals, and thus producing the equivalent resistance R =V/I. Consequently, the calibrator sources the signal correctly only for such devices that employ this method of measurement.  The allowable range of the resistance measuring current I that the calibrator receives from a resistance measuring device under calibration is rated as 0.1 mA to 3 mA.
  • Page 23 digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption. Holding down the〔〕/〔〕key continuously changes the digit in question. And the value won’t change if it is increased or decreased to the Maxim or Minimum value.
  • Page 24 Each press of the〔〕/〔〕key increases or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption. Holding down the〔〕/〔〕key continuously changes the digit in question. And the value won’t change if it is increased or decreased to the Maxim or Minimum value.
  • Page 25 to the changes of the reference junction compensation). Pressing the 〔T.DISP〕key once more, LCD shows the present room temperature value in assistance districts part of the LCD. 7.6 Simulate Sourcing RTD  Firstly, the calibrator sources a resistance signal by receiving the resistance-measuring current I supplied from the device being calibrated (such as a resistance meter) and then delivering the voltage V proportional to the preset resistance R between the output terminals, and thus producing the equivalent resistance R =V/I.
  • Page 26 Each press of the〔〕/〔〕key increases or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption. Holding down the〔〕/〔〕key continuously changes the digit in question. And the value won’t change if it is increased or decreased to the Maxim or Minimum value.
  • Page 27 Each pair of〔〕/〔〕keys corresponds to each digit of the LCD reading. Each press of the〔〕/〔〕 key increases or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption. Holding down the〔〕/〔〕 key continuously changes the digit.
  • Page 28 ‘’OFF‘’ state. 7.8 Sourcing Number of Pulses The calibrator can source a preset number of pulse signal responding to the preset frequency and amplitude. Step 1: Using the〔 〕key, select pulse source function. The LCD shows the default value10 Hz. Step 2: Using the〔RANGE〕key, select a desired frequency range from 100Hz, 1KHz, 10kHz.
  • Page 29 Step 7: Set the output value digit by digit using each pair of〔〕/〔〕output setting keys. Each pair of〔〕/〔〕keys corresponds to each digit of the LCD reading. Each press of the〔〕/〔〕 key increases or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing you to set the output value without interruption.
  • Page 30 vanishes from the LCD. Press the〔START〕key once more to restart the sourcing function. 7.9 Sourcing Switch You can turn on or off the output terminals by using the contact output function. An FET is used as the contact-switching device. Step 1: Using the〔 〕key, select the contact output source function.

  • Page 31: Factory Default

    The contact output is polarity. Generally, connect the positive polarity with the H jack of the calibrator and  the negative polarity with the L jack.  Note the maxim allowable current of the contact output is 50mA. 7.10 Zero-off function In any range of DC voltage, DC current, ohm, TC and RTD functions, pressing the 〔ZERO〕...

  • Page 32: Setting Backlight Time

    8.2 Setting Backlight time Step 1: Pressing the 〔START〕key ,LCD displays “BL.OFF” symbol on the upper part, indicating backlight time setting mode. Step 2: Set the time by using the pair of 〔〕/〔〕. And the unit is second. Each pair of〔〕/〔〕keys corresponds to each digit of the LCD reading. Each press of the〔〕/〔〕 key increases or decreases the digit.
  • Page 33 as below: AP.OFF: 10min. BL.OFF: 10sec. TMP.U: ℃. Tips: Any change of setting to the above-mentioned function, press the 〔ON〕 key to save the value. Any press of the〔ON〕key saves the nearest setting value. 9 Adjusting Source Functions Environmental Requirements Ambient temperature: 23 +2℃...
  • Page 34 DCV_100mV 100mV DCV_1000mV 1000mV DCV_10V DCmA_20mA 20mA OHM_400Ω/1mA 0Ω 400Ω -0Ω -400Ω I=±1mA OHM_400Ω/0.1mA 0Ω 400Ω -0Ω -400Ω I=±0.1mA OHM_4KΩ/0.1mA 0Ω 4KΩ -0Ω -4KΩ I=±0.1mA OHM_40KΩ/0.01mA 0Ω 40KΩ -0Ω -40KΩ I=±0.01mA ﹡Adjusting the displayed value same with the reading of the digit meter when the present calibrator is stabilized.
  • Page 35 If the battery level is below 25% full, the adjustment operation can't be operated. And the LCD shows "ERR" in the lower part. digital meter ( KEITHLEY 2000) 9.1 Adjusting Voltage Source Step 1: Using the key〔V〕, select DC voltage function. Connect the lead cables for measurement to the standard digital meter as shown in Figure 11.
  • Page 36 Note:  Adjustment to the 100mV range calibrates the TC temperature measurement range at the same time.  Make sure the previous adjusting point has been saved before shifting to another one. 9.2 Adjusting Current Source digital meter Step 1: Using the key 〔 mA〕 , select DC current function. (KEITHLEY2000 ) Connect the lead cables for measurement to the standard digital meter as shown in Figure12.
  • Page 37 Make sure the previous adjusting point has been saved before shifting to another one. 9.3 Adjusting Resistance Source digital meter ( KEITHLEY2000 ) NORMAL SCOPE Step 1: Using the key 〔OHM〕 , select resistance function. Connect the lead cables for measurement to the standard digital meter as TRIG shown in Figure13.
  • Page 38 Note:  In ohm calibration function, you can differentiate the negative exciting calibration from the left “-” mark on the lower part. The value of the exciting current is indicated by the digit on the top right corner.(unit :mA)  Make sure to preserve the calibrating value before changing the calibrating point or range.

  • Page 39: How To Use The Charger

    To avoid possible linkage of the liquid and explosion of the battery, make sure to place the battery with  right polarity.  Do not operate the battery in short-circuit.  Do not disassemble or heating the battery or throw them into the fire ...

  • Page 40: Maintenance

    Warning  The charger could be used only to specified product.  Make sure the voltage of the AC power is same with the given voltage of the charger before connecting them.  Do not shut circuit the output plug of the charger. ...
  • Page 41 Caution To avoid damaging the plastic lens and case, do not use solvents or abrasive cleansers. Clean the Calibrator with a soft cloth dampened with water or water and mild soap. 12.2 Calibration or Sending to the Service Center Calibration, maintenance or repair work unmentioned in this manual should be undertaken by the experienced worker.

  • Page 42: Replacement Of Parts

    12.3 Replacement of Parts All the types of parts are listed in Table 8, see Figure 15 as reference. Figure 15 Replacing part...
  • Page 43 Table 5. Replacing parts Item Instruction Quantity Item Instruction Quantity Top panel Spring A plastic lens Spring B Rubber Key Spring C Terminal Wrapper AAA Alkaline battery Terminal Gasket Tilt-stand LCD Frame Screw M3*16 Battery Door Backlight Panel Plastic Screw Conductive Rubber Sponge：length×width×height wire...

  • Page 44: Specifications

    13 Options For more information about the options (see Figure 16) and its price, please contact the representative of the company. Table 6 Options No. Name of the Options Mode CALCT Temperature A000019 Probe TC Plug R/S/K/E/J/ T/N/B/L/U Test Hoop TP907110 CA Battery Parcel A000021...
  • Page 45 Accuracy is expressed as ± (percentage of set value + percentage of range) Function Referenc Range Resoluti Accuracy Remark DC voltage 100mV -10.000mV ～ 1μV 0.02+0.01 Maximum output current: 0. 5mA 110.000mV 1000mV -100mV ～ 10μV 0.02+0.01 Maximum output current: 2mA 1100mV -1.0000V 0.1mV...
  • Page 46 40KΩ 0.000 KΩ ～ 1Ω 0.1+0.1 Excitation current: ±0.01mA; 40.000 KΩ Does not include lead resistance; 1C By using ITS-90 temperature 0C～1767C 0～100℃ : 1.5℃ scale; 100～1767℃: 1.2℃ The accuracy does not include 0C～1767C 0～100℃ : 1.5℃ the error of internal temperature 100～1767℃: 1.2℃...
  • Page 47 1C 600C～1820C 600～800℃ : 1.5℃ 800～1820℃: 1.1℃ 0.1C -200.0C～900.0C -200.0～0.0℃ : 0.7℃ 0.0～900.0℃ : 0.5℃ -200.0C～600.0C -200.0～0.0℃: 0.7℃ 0.0～600℃: 0.5℃ Pt100-385 -200.0C～800.0C 0.1C using temperature scale -200.0～0.0℃ : 0.3℃ ITS-90 0.0～400.0℃ : 0.5℃ Excitation current: ±0.5～±3mA 400.0～850.0℃ : 0.8℃ for Pt100, Cu10, Cu50; Add Pt200-385 -200.0C～630.0C -200.0～100.0 :...
  • Page 48 Cu10 -100.0C～260.0C 1.8℃ Cu50 -50.0C～150.0C 0.6℃ FREQ 100Hz 1.00Hz ～ 0.01Hz Output voltage: +1~+11 V 110.00Hz (zero base waveform); Amplitude accuracy: ±(5% 1KHz 0.100KHz ～ ±2 count 1.100KHz +0.5V); Maximum load: >100 KΩ; 10KHz 1.0KHz 0.1KHz ～ Duty Cycle: 50%. 11.0KHz 100KHz 10KHz～110KHz...
  • Page 49 Temperature Coefficient: 0.1 times the applicable accuracy specification per degree C for 5 to 18  ℃ ℃ and 28 50 . ℃ ℃  The range of the internal temperature compensation sensor is from 0℃ to 50℃, compensation error ≤±0.5℃.

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