Extech Instruments 412300 Manuel utilisateur

412300/55es Ver. 1.5 8/00

INSTRUCTION MANUAL

Model 412300 and 412355

Current Calibrator and Current & Voltage Calibrator

•Flip-up display/cover

•Source and Measure Voltage / Current

•Hands free operation

•Battery operated, portable

1. INTRODUCTION

Congratulations on your purchase of Extech's Model 412300 Current Calibrator /

Meter or Model 412355 Current / Voltage Calibrator. With proper care this meter will

provide years of safe, reliable service.

412300/55es Ver. 1.5 8/00

2. SPECIFICATIONS

Measure (signal input) Current

Voltage

0 -50 mA (Maximum)

0-19.99V (412355 only)

Source (signal output) Current

Voltage

0-24mA

0-10V (412355 only)

Loop Power 12V DC (412300 only)

Ranges / Resolution Current

Voltage

0-19.99mA 0.01mA

0-24.0mA 0.1mA

0-1999 mV 1 mV (412355 only)

0-10.00V 10 mV (412355 only)

-25-125.0% 0.1% (412300 only

(4-20mA = 0.0% -100%))

Accuracy +(0.075% + 1 digit) or +2 digits (whichever is greater)

Power 9 volt battery or optional AC adaptor

Max. Load 350 ohms at 20 mA

Display 3 1/2 Digit LCD , 0.5"

Power off Manual or automatic with case closure

Dimensions 3.8x4.2x1.8" (96x108x45mm) folded

Weight 12 oz. (340g)

Accessories Supplied 9V battery, Cal. cable with spade lugs

Optional Accessories AC Adaptor, NIST Cert., Carrying Case

3. FRONT PANEL DESCRIPTION

1LCD display

2Power On/Off switch

3Function switch

4Input/Output switch

5Output adjust

6AC adaptor connector

7Battery compartment

8Range switch

412300/55es Ver. 1.5 8/00

4 OPERATION

Note: During operation, always check for the low battery indication ("LO

BAT") on the display. Operation of the meter with a low battery

condition may result in inaccurate readings.

4.1 Measure Mode (measure input signal)

a) Slide the "Function" switch to the "Measure" position.

b) Connect the calibration cable to the device being measured observing

polarity.

c) Set the Range switch to the proper range for the expected voltage or

current.

d) Move the "ON-OFF" switch to the ON position.

4.2 Source Mode (output simulated signal)

a) Slide the "Function" switch to the "Source" position.

b) Connect the calibration cable to the device being tested observing

polarity.

c) Set the Range switch to the proper range for the desired voltage or

current.

d) Move the "ON-OFF" switch to the ON position

e) Adjust the "OUTPUT" control to the desired level.

4.3 Power / Measure Mode (output 12V DC and measure current, 412300 only)

a) Slide the "Function" switch to the "Power/Measure" position.

b) Connect the calibration cable to the device being tested observing

polarity.

c) Set the Range switch to the proper range for the expected current.

d) Move the "ON-OFF" switch to the ON position

Note:Do not short the output leads when operating in the

Power/Measure Mode. This will cause excess current drain and

may also damage the calibrator. A reading of 50mA indicates

that the leads are shorted.

5. BATTERY REPLACEMENT

a) Open the lid as far as possible.

b) Remove the battery compartment cover using a coin at the arrow

indicator (item 7 in diagram for section 3).

c) Replace the battery and reinstall the cover.

6. AC ADAPTOR (option)

The optional AC adaptor provides power to operate the calibrator for extended

periods of time. When the adaptor plug is inserted into the calibrator, the battery is

disconnected.

412300/55es Ver. 1.5 8/00

7. CALIBRATION / REPAIR SERVICES

Extech offers complete repair and calibration services for all of the products we sell. For

periodic calibration, NIST certification or repair of any Extech product, call customer service

for details on services available. Extech recommends that calibration be performed on an

annual basis to insure calibration integrity.

8. WARRANTY

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and

workmanship for one year from date of shipment (a six month limited warranty applies on sensors and

cables). If it should become necessary to return the instrument for service during or beyond the warranty

period, contact the Customer Service Department at (781) 890-7440 for authorization. A Return

Authorization (RA) number must be issued before any product is returned to Extech. The sender is

responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit.

This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring,

operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech

specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not

be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to

repair or replacement of the product.

The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or

implied.

including the right of reproduction in whole or in part in any form.

(

Tech Support Hotlines

781-890-7440 ext. 200

[email protected]

www.extech.com

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