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Section One Safety Information
To ensure the safety operation, the following signs are used only as
specified in this operation instruction：
Warning
A warning shows that if the operation
does not comply with the following correct
instruction it is possible to bring hazards to
the user or cause damage to the
instrument in use. The warning also points
out how to avoid the accidents.
Caution
A caution shows that if the operation
does not comply with the following correct
instruction, it is possible to cause damage
to the instrument in use .The caution also
points out how to avoid mal-operation.
Note
A note serves as a sign to remind the user
that is must understand the correct
operation of the instrument and its
characteristics.
To prevent the user and the Instrument from any electric shock and
other hazards, it is necessary to observe the following regulation:
Warning
• It is not allowed to operate the Instrument at the working field where
there exists flammable gas or explosive gas or vapor. It is very
dangerous to operate the instrument in such a surrounding.
• Never apply more than 30V between any two terminals, or
between any terminal and earth ground.
Caution
• No one is allowed to remove the split case of the Instrument except
professionals.
• Periodically wipe the case with a damp cloth and detergent; do not
use any corrosive solvents.
Note
• To keep the Instrument in a designed accuracy, it needs warming
up 5 minutes before it is put into operation.
• If any user requires a higher accuracy of the calibrator, he or she is
requested to make contact with the manufacturer or our product
distributors.
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Related Manuals for TECPEL CL-420B
Summary of Contents for TECPEL CL-420B
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Page 1: Section One Safety Information
• It is not allowed to operate the Instrument at the working field where there exists flammable gas or explosive gas or vapor. It is very dangerous to operate the instrument in such a surrounding. • Never apply more than 30V between any two terminals, or https://tecpel.com - 1 -... -
Page 2: Section Two Instrument Panel Layout And Functions
： When this symbol appears, it denotes that the battery is nearly used up and needs replacing. ： When this symbol appears, it denotes that Input/outp the output digits need setting. terminal V、mA 、% ： These symbols denote the units of both https://tecpel.com - 2 -... -
Page 3: Section Three Instrument Maintenance
Soak a new swab with alcohol. Clean each screwdriver to turn the battery door fasteners, terminal with the swab. and then take of the battery case; Replace with two new batteries; https://tecpel.com - 3 -... -
Page 4: Section Four Power-On/Off Of Instrument
When the power is turned on, the Instrument starts then take off the cover; to make self-diagnosis internally and the full screen is in https://tecpel.com - 4 -... -
Page 5: Section Five Output From Instrument
Do not apply voltage to the output terminal during the operation. If any improper voltage is applied to the output terminal, it will cause damage to the internal circuit. Figure 5-1 Press the key〔OUTPUT/IN〕, and the OUTPUT https://tecpel.com - 5 -... - Page 6 %, and then the unit ‘mA’or‘mA % When the key 〔 STEP/AUTO 〕 is pressed, the appears; symbols ‘OUTPUT’, ‘OFF’, ‘ ’along with ‘4mA’ Press the key 〔〕/〔〕to change the output in appear in the LCD. If so, it denotes that the https://tecpel.com - 6 -...
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Page 7: Section Six Instrument Measurement
Instrument and connect the other end Warning with the input terminal of the user’s device as shown During the operation, never apply more than 30V in the Figure 5-2: between any two terminals, or between any terminal and https://tecpel.com - 7 -... - Page 8 ‘mA %’, in which the value of 0 % denotes 4mA and -31.25～112.50 -25.00 mA % the value of 100% denotes 20mA. mA % The Instrument starts measurement, and the LCD 28 V 0.000 V displays ‘ON’, measured result -0.2000～28.000 V simultaneously. https://tecpel.com - 8 -...
- Page 9 The key operation is the same as that of measuring simultaneously. the DC current. The refreshing rate of measurement result is twice every second. And the LCD displays ‘OL’ if the measured value exceeds the measuring range. https://tecpel.com - 9 -...
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Page 10: Section Seven Setting Function
‘AP- OF ’, the Instrument removes auto-power-off function; And when the LCD displays ‘AP- ON ’, the Instrument recovers the auto-power-off function. Press the key 〔100%/START〕 to store the selection; Cut off the power again to exit from the maintenance function. https://tecpel.com - 10 -... -
Page 11: Section Eight Performance Index
400mA /3V under the condition of 10mA with 1kΩ load Max. permitted voltage 30V(between any two terminals or between any terminal and earth ground) Operating temperature 0℃ to 50℃ Operating relative humidity ≤80% RH https://tecpel.com - 11 -... -
Page 12: Section Nine Calibration
Usage: during the operation, avoid short circuit and never apply more than the max. permitted voltage to the output of the Instrument or to a co-working standard device, otherwise any mal-operation will cause possible damage to their internal circuits. Selecting Standard Equipment Table 10-1 https://tecpel.com - 12 -... - Page 13 Table 10-2: ‘CAL 0’ appear in the LCD; Press the key 〔OUTPUT / INPUT〕 to select output function , and the LCD displays ‘OUTPUT ’,‘mA ’; https://tecpel.com - 13 -...
- Page 14 ‘CAL 0 FS’. With the output stabilized, repeat ‘INPUT ’,‘mA ’; the operation of steps 5 and 6. Connect to the Instrument as shown in Figure 10-2; Operating Input Calibration Operating calibration in order of items and calibration points in Table 10-3： https://tecpel.com - 14 -...
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Page 15: Section Ten Notice Of The Manual
Table 10-3 and when the output stabilized , press should not be used as grounds to apply this product the key〔100%/START〕, and the LCD displays to a particular purpose. ‘SAVE ’, denoting that the calibrated point has been https://tecpel.com - 15 -...