TECPEL CL-327A User manual

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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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3 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.
 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.
A Warning identifies conditions and actions that pose hazards to the user; a Caution identifies conditions
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.
Table 1 Explanations of International Electrical Symbols
EARTH GROUND
WARNING
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;
 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
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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;
 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 ( ) appears.
Caution
To avoid possible damage to meter or to equipment under test:
 Use the proper jacks, functions, and ranges for the mA source operation.
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5 Familiar With the Calibrator
Figure 1 Entire Graph Figure 2 Source Terminals
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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
② Source Signals：（+）FREQ、PULSE、
SWITCH
③ Source Signals：（-）DcmA
④ All the common (return ) （-）terminals of
source function
⑤ Source Signals：（-）OHM、RTD
⑥ Source Signals：3W Terminal
⑦ Source Signals：（+）OHM、RTD、DCV、
TC
⑧ Source Signals：4W Terminal
Figure 3 keys
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Table 3 Functions of the keys
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
11 Source START key Source auto-pulse number, turn on mA auto-stepping or
sweeping function.
12 Source ON key Turn on or off source function
13 Power key Turn on or off the power
14 Backlight key Turn on or off the backlight
15 Source V key Select DC-voltage source function
16 Source RTD key Select RTD source function
17 Source OHM key Select resistance source function
18 Source TC Key Select TC source function
19 Source Key Select pulse number, frequency or switch source function
20 Source mA Key Select mA source function
21 RJ-ON Key In TC source function, turn on or off the RJ compensation
function.
22 T.DISP key 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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value and room temperature;
In others source function, press the key, convert the room
temperature or display is close.
23 Source RANGE Key Select source range
24 Zero Key Set the source value to default.
In pulse source function, set the pulse number.
26
Key
In DCmA source function ,select the auto-wave mode.
In frequency , pulse or switch source function , set the
source amplitude.
27
25/100% Key
In mA source function, select 25% or 100% manual step
output mode.
In pulse number, frequency or switch source, set the
frequency value.
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
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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 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.”
 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
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:
 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.
 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:
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.
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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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
COM output terminal and the red lead cable to the “VTc” output terminal.
Step 2: Connect the other ends of the cables to the input Figure 5
Sourcing DC voltage, TC
of equipment under test while making sure the polarities
are correct.
For DC current (Figure 6)
Step 1: Connect the black lead cable for source to the
“mA-” output terminal and the red lead cable to the
‘’mA+’’ output terminal.
Step 2: Connect the other ends of the cables to the input of
equipment under test while making sure the polarities are
correct.
Figure 6 Sourcing DC Current
For resistance and RTD signal (Figure 7)
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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.
Figure 7 Sourcing Resistances and RTD
For Frequency,Pulse and Switch (Figure 8)
Step 1: Connect the black lead cable for source to the
COM output terminal and the red lead cable to the “Hz”
output terminal.
Step 2: Connect the other ends of the cables to the input
of equipment under test while making sure the polarities
are correct.
Figure 8 Sourcing Frequency, Pulse and Switch
7.2 Sourcing DC Voltage
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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.
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 in question. And the value won’t change if it is increased or decreased to
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 voltage between the output terminals.
Step 4: To turn off the output, press the〔ON〕key once again. The’’ OFF ‘’ appears on the LCD and no signals
sourced between the terminals.
7.3 Sourcing DC Current
Step 1: Using the〔mA〕key to select the desired source function 0-22mA .The default value and unit of the
selected source function shall be displayed in the main districts part of the LCD.
Step 2: Set the output value digit by digit using〔〕/〔〕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. Holding down the〔〕/〔〕
key continuously changes the digit in question. And the value won’t change if it is increased or decreased to
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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. The’’ OFF ‘’appears on the LCD and no signals
sourced between the terminals.
7.3.1 Manual Set 25%, 100% 4–20 mA Function
You can set the source value in 4 mA or 16mA increments or decrements within 4–20 mA current.
Step 1: In DC current function, press the〔25%100%〕key to display “25%SET” on the lower part of the screen,
and press once again to display “100%SET”.The default source value will be showed simultaneously.
Step 2: Using each pair of 〔〕/〔〕output setting keys, set the signal in a step-by-step manner. In 25% set
point condition, you can set the signal in 4 mA increments or decrements in the order 4-8-12-16-20 by each
press of the key. In 100% set point condition, you can set the signal in 16 mA increments or decrements in the
order 4-20 by each press of the key. Pressing the〔ZERO〕key initializes the signal set point to the default value
4mA.
Step 3: Pressing the〔ON〕key causes the indicator on the LCD to change from ‘’OFF‘’ to ‘’ON ‘’. The calibrator
sources the preset 4–20 mA current signal between the output terminals.
Step 4: To turn off the output, press the〔ON〕key once again. The’’ OFF ‘’appears on the LCD and no signals
sourced between the terminals.
7.3.2 Auto-stepping and auto-sweeping 4-20mA function
You can set a 4–20 mA range within which to source out current in 4 -20mA increments or decrements in auto
–stepping mode or in auto-sweeping mode. It requires 80 seconds to finish a 4-20mA cycle for auto-sweeping
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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.
Step 2: Pressing the〔ON〕key causes the indicator on the LCD to change from ‘’OFF‘’ to ‘’ON ‘’. The calibrator
sources the default 4 mA current signal between the output terminals.
Step 3: Pressing the〔START〕key starts the auto-stepping and auto-sweeping mode. The “RUN “ mark shall
be displayed in the lower part of the LCD.
Step 4: Pressing the〔START〕key once more stops the auto-stepping and auto-sweeping mode. The “RUN
“ mark disappears. The terminals source the value displayed on the screen.
Step 5:Pressing the〔ON〕key stops sourcing and ‘’OFF’’ mark displayed on the screen. No signals sourced
between the terminals.
Tips:
 Press the 〔START〕key again to continue the auto-stepping and auto-sweeping mode after stopping them,
and “RUN” mark displays on the lower part of the screen.
 Using the〔START〕key to start mA auto-stepping and auto-sweeping mode is only available when the
source function is in ON state.
7.3.3 mA% display
In mA source function, the preset value displays on main districts of the LCD, and mA% displays on assistance
districts of the LCD, converts the preset source value into mA% mode in the following way.
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