TECPEL CL-327A User Manual

Process Signals Source

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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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3 Standard Accessories

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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.

 One set of Industrial testing Lead （CL727220）
 A set of Testing Lead （Tp727110）
 A set of Alligator clip （CC807130）

 A quick reference guide

 A User's Manual

 One Fuse 50mA/250V

 One Fuse 63mA/250V

4 Safety Information

For the correct and safe use of the instrument, be sure to follow the cautionary notes stated in this manual

whenever handling the instrument. The Company shall not be held liable for any damage resulting from use of

the instrument in a manner other than prescribed in the cautionary notes.

Warning identifies conditions and actions that pose hazards to the user; a Caution identifies conditions

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and actions that may damage the meter or the equipment under test.

Refer to Table 1 for the explanation of the international electric symbols adopted by the calibrator or the user’s

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manual.

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Table 1 Explanations of International Electrical Symbols

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;

 Follow all equipment safety procedures;

 Do not connect the probe of the testing lead with any live power when the other end has been inserted into

the current jack;

 Do not use the meter if it is damaged. Before using the meter, inspect the case. Look for cracks or missing

plastic .Pay particular attention to the insulation surrounding the connectors;

 Make sure the battery door is closed and latched before operating the meter;

 Remove test leads from the meter before opening the battery door;

 Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Replace

damaged test leads before using the meter;

 When using the probes, keep fingers behind the finger guards on the probes;

 Connect the common test lead before connecting the live test lead. When disconnecting test leads,

disconnect the live test lead first.

 Do not use the meter if it operates abnormally. Protection may be impaired. When in doubt, have the

EARTH GROUND

WARNING

INFORMATION

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meter inspect.

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 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;

 Use only type 4 AAA batteries, properly installed in the meter case, to power the meter;

 Do disconnect the testing lead before shifting to different source functions;

 When servicing the meter, use only specified replacement parts.

 To avoid false reading, which could lead to possible electric shock or personal injury, replace the batteries

as soon as the low battery indicator (

Caution

To avoid possible damage to meter or to equipment under test:

 Use the proper jacks, functions, and ranges for the mA source operation.

) appears.

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5 Familiar With the Calibrator

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Figure 1 Entire Graph Figure 2 Source Terminals

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5.1 Source Terminals 5.2 Keys

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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

②

③ Source Signals：（-）DcmA

④

⑤ Source Signals：（-）OHM、RTD

⑥ Source Signals：3W Terminal

⑦

⑧ Source Signals：4W Terminal

Source Signals：（+）FREQ、PULSE、

SWITCH

All the common (return ) （-）terminals of

source function

Source Signals：（+）OHM、RTD、DCV、

TC

Figure 3 keys

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Table 3 Functions of the keys

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No. Name Function

1~5 Source value set key Increment of source set point

6~10 Source value set key Decrement of source set point

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13 Power key Turn on or off the power

14 Backlight key Turn on or off the backlight

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16

17

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19 Source Key Select pulse number, frequency or switch source function

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21

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Source START key

Source ON key

Source V key

Source RTD key

Source OHM key

Source TC Key

Source mA Key

RJ-ON Key

T.DISP key

Source auto-pulse number, turn on mA auto-stepping or

sweeping function.

Turn on or off source function

Select DC-voltage source function

Select RTD source function

Select resistance source function

Select TC source function

Select mA source function

In TC source function, turn on or off the RJ compensation

function.

In TC/RTD source function, press the key , convert the
room temperature and the mV/Ωvalue ;

In mA source function, press the key , convert the mA%

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5.3 Display Screen

Figure 4 shows a typical display screen.

a：Source
b：Source Frequency
c：Source Resistance
d：Source Switch
e：Battery level indicator
f： Source function on

Source RANGE Key

Zero Key

Key

25/100% Key

value and room temperature;

In others source function, press the key, convert the room

temperature or display is close.

Select source range

Set the source value to default.

In pulse source function, set the pulse number.

In DCmA source function ,select the auto-wave mode.

In frequency , pulse or switch source function , set the

source amplitude.

In mA source function, select 25% or 100% manual step

output mode.

In pulse number, frequency or switch source, set the

frequency value.

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g：Source function off

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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 Figure 4 typical LCD display
u：Source unit of assistance district
v：Source number of pulses / stort DCmA auto-stepping or sweeping source function

6 Before starting source

Operating Precautions

Precautions for Safe Use of the Instrument

 When using the instrument for the first time, be sure to read the instructions given in Section Four

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“Precautions for Safe Use of the Instrument.”

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 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. If you are using an Charger, disconnect the plug from the wall outlet.

Also cut off power to the object under test that is connected to the input terminals. Then, contact the

vendor from which you purchased the instrument.

 Charger

Use an Charger dedicated to the instrument. Avoid placing any load on the Charger, or prevent any

heat-emitting object from coming into contact with the adapter.

General Handling Precautions

 Before carrying around the instrument turn off power to the object under test, and then the POWER key of

the instrument. If you are using an Charger, disconnect the power cord from the wall outlet. Finally, detach

all lead cables from the instrument. Use a dedicated carry case when transporting the instrument.

 Do not bring any electrified object close to the input terminals, since the internal circuit may be destroyed.

 Do not apply any volatile chemical to the instrument’s case or operation panel. Do not leave the

instrument in contact with any product made of rubber or vinyl for a prolonged period. Be careful not to let

a soldering iron or any other heat-emitting object come into contact with the operation panel, as the panel

is made of thermoplastic resin.

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 Before cleaning the instrument’s case or operation panel disconnect the power cord plug from the wall

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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.

 If you are using an Charger with the instrument and will not use the instrument for a prolonged period,

disconnect the power cord plug from the wall outlet.

 For handling precautions regarding the batteries, see “Installing or Replacing the Batteries”.

 Never use the instrument with the cover of the battery holder opened.

Environmental Requirements

Use the instrument in locations that meet the following environmental requirements:

 Ambient temperature and humidity

Ambient temperature range: 0 to 50℃

Ambient humidity range: 20 to 80% RH. Use the instrument under non-condensing condition.

 Flat and level locations

Do not use the instrument in locations that are

 Exposed to direct sunlight or close to any heat source.

 Exposed to frequent mechanical vibration.

 Close to any noise source, such as high-voltage equipment or motive power sources.

 Close to any source of intensive electric or electromagnetic fields.

 Exposed to large amounts of greasy fumes, hot steam, dust or corrosive gases.

 Exposed to unstable or a risk of explosion due to the presence of flammable gases.

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Note:

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 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” to the given accuracy rating.

 When using the instrument at an ambient humidity of 30% or lower, prevent electrostatic charges from

being produced, by using an antistatic mat or any other alternative means.

 Condensation may occur if you relocate the instrument from places with low temperature and humidity to

places with high temperature and humidity, or if the instrument experiences any sudden temperature

change. In that case, leave the instrument under the given ambient temperature for at least one hour to

ensure that the instrument is free from condensation, before using the instrument.

Installing or Replacing the Batteries

Warning

To avoid electrical shock, always remove the source lead cables from the object under test, as well as from the

instrument itself.

Caution

 To avoid the risk of fluid leakage or battery explosion, install batteries with their positive and negative

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electrodes correctly positioned.

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 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.

 If the instrument will not be used for a prolonged period, remove the batteries from the instrument.

Step 1: Remove the lead cables and charger and turn off the calibrator before you begin installing batteries.

Step 2: Remove the battery holder cover by sliding it in one-quarter counterclockwise direction and turn off the

calibrator.

Step 3: Install four alkaline batteries of same type in the battery holder with their positive and negative

electrodes positioned correctly as indicated on the holder.

Step 4: After replacement, reattach the battery holder cover.

Indication of Battery Level

The battery replacement indicator shows the battery level in five steps according to the measured voltage of

the batteries.

Full battery:

The battery level is below 50% full:

The battery level is below 25% full:

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Low battery:

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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. If the calibrator will be used under a wide variety of conditions, it is

advisable that the battery replacement indicator be verified under heavy loads.

Connecting the Charger

Warning

 Make sure the voltage of the AC power source matches the rated supply voltage of the Charger, before

connecting the Charger to the AC power source.

 Do not use any Charger other than the dedicated Charger from the Company.

 Do not charge non Ni-Cd, Ni-MH batteries or wasted batteries.

Step 1: Make sure the calibrator is turned off.

Step 2: Insert the plug of the optional Charger into the Charger connection jack.

Note

 Turn off the calibrator before connecting or disconnecting the Charger from AC power, plugging in/out the

Charger connection jack.

 Plug out the Charger from the Charger connection jack of the calibrator when discharging.

 Do not charge the calibrator without any battery in.

Turning On the Power

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Pressing the Power key once when the power is off turns on the calibrator.

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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. This feature makes it easier for you to view the LCD when operating the calibrator in dark places or when

carrying out source or measurement. Battery life shortens when the calibrator is operated on batteries.

Note

The backlight automatically turns off after 10 seconds. Press the key once more to relight it.

The time could be reset in the factory default parts, see Chapter 8 “Factory Default”.

7 Source

From the calibrator, you can source a DC voltage, DC current, simulate transmitter, resistance, thermocouple,

RTD, frequency, pulse signal or contact output.

Warning

To avoid electrical shock, do not apply more than the rated voltage, as marked on the calibrator, between

terminals or between any terminal and earth ground. Always use the calibrator in locations with a voltage to

ground below 30 Vp-p.

Caution

 Do not apply any voltage to the output terminals for ranges other than 4-20mA simulating transmitter

output, Otherwise, the internal circuitry may be damaged.

 The instrument has been calibrated without taking into account a voltage drop due to the resistance

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