EXTECH Current / Voltage Calibrator 412355A User Manual

: June 7, 2024
: EXTECH

Table of Contents

EXTECH Current / Voltage Calibrator 412355A User Manual
Introduction
Meter Description
Battery Replacement
Operation
Measure and Source
Specifications
Two-year Warranty
Calibration and Repair Services
Contact Customer Support
- References
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Download This Manual (PDF format)

EXTECH Current / Voltage Calibrator 412355A User Manual

EXTECH Current OR Voltage Calibrator 412355A

Model 412355A

Additional User Manual Translations available at www.extech.com

Introduction

Congratulations on your purchase of the Extech Current/Voltage Calibrator. The Model 412355A can measure and source current and voltage. The Oyster Series meters have a convenient flip up display with neck-strap for hands-free operation. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

Meter Description

FIG 1 Meter Description

LCD display
POWER button
UP and DOWN buttons
MODE button
UNIT button
MEM and ZERO button
Input/Output mini-connector
AC adaptor jack
Battery compartment
Neck strap holders
Function switch

Battery Replacement

When the LOW BAT message appears on the LCD, replace the 9V battery as soon as possible.

Open the calibrator’s lid as far as possible.
Open the battery compartment using a coin at the arrow indicator.
Replace the battery and close the cover.

Operation

POWER BUTTON and AUTO POWER OFF FEATURE

Use the POWER button to turn the unit ON or OFF. When the unit is powered up, a short selftest will ensue after which the display will stabilize.
This meter can either be powered by one 9V battery or an AC adapter.
When the battery symbol appears on the LCD display, replace the battery as soon as possible. Low battery power may cause inaccurate readings and erratic meter operation.
This instrument is equipped with Auto Power OFF which turns the meter off after 10 minutes of inactivity. To override this feature; press and hold the MODE button until the display shows (auto power off de-activated) or (auto power off activated

FUNCTION SLIDE SWITCH
Slide the Function switch on the side of the meter to the desired function (Voltage or Current)

MODE
Press the MODE button to select either SOURCE (output) or MEASURE (input)

UNIT BUTTON
Press the UNIT button to select:

Voltage mode: mV or V in source.
Current mode: mA or % in source or measure

▲▼ OUTPUT ADJUST BUTTONS
Press the ▲ ▼buttons to increase or decrease the output voltage or current value in the source
mode.

Press the ▲ button once to increase the value in one digit steps.
Press and hold the ▲ button to increase the value in 10 digit steps.
Press and hold the ▲ button > 2 sec and then press the ▼ to increase the value in 100
digit steps
To decrease the value, use the ▼ button as described above.

ZERO BUTTON
The ZERO button manually zeros the display in the MEASURE mode.

Set the meter to the MEASURE mode
Short the input jack
Press and release the ZERO button.

MEM BUTTON
The memory feature provides 5 user settable source values for stepped calibration outputs. The
feature is available for Voltage, mA and % in the SOURCE mode. The memory values are stored in nonvolatile memory and are not erased when power is turned off.

Sourcing from the stored memory values:

Select the Source mode
Press the MEM button. The M1 icon (memory location 1) will appear in the display and the
value stored in that location will be displayed and sourced.
Repeated pressing of the MEM button will step through the 5 memory locations.

NOTE: The “SOURCE” icon will blink when the output value has not reached a stable level.
The common cause for the “SOURCE” icon to remain blinking is that the load impedance is
too high in the current mode or too low in the voltage mode.

Storing values into memory:

Select and display a memory location (M1 to M5)
Press the ▲ ▼buttons to adjust the display to the desired source value.
Press and hold the MEM button for > 2 seconds. The displayed value will be stored into the displayed memory location.

Default memory values.
Five common source values are permanently programmed in memory as the default values.
These values can be replaced by user selected values.
To reset the meter to the default memory values:

Turn the meter on and select the SOURCE mode.
Press and hold the POWER button for >4 seconds. will briefly appear in the display and the default values will be stored into memory.

FIG 2 Default memory values

Over-range / Under-range Indication
Signals above or below the units ranges will be indicated by “HHHH” for above and “LLLL” for
below.

Measure and Source

MEASURE (Input)
In this mode, the unit will measure voltage or current.

Select Voltage or Current on the Function switch.
Turn the meter ON
Press the MODE button to select MEASURE
Press the UNIT button to select mA or % if current is selected.
Connect the Calibration Cable to the meter.
Connect the Calibration Cable to the device or circuit under test.
Read the measurement on the LCD display.

SOURCE (Output)
In this mode, the unit will source (output) voltage or current.

Select Voltage or Current on the Function switch.
Turn the meter ON
Press the MODE button to select SOURCE
Press the UNIT button to select V or mV if voltage is selected or to select mA or % if current is selected.
Connect the Calibration Cable to the meter.
Connect the Calibration Cable to the device or circuit under test.
Use the ▲ ▼buttons to select the desired output value. Use the LCD display to verify the output level. Alternatively, use the stored calibration values in memory as described in the MEM button section.
For the -25% to 125% output range the output is 0 to 24mA.

$FIG 3 SOURCE $Output$$

NOTE: The “SOURCE” icon will blink when the output value has not reached a stable level. The common cause for the “SOURCE” icon to remain blinking is that the load impedance is too high in the current mode or too low in the voltage mode.

Specifications

General Specifications

Display: 9999 count LCD
Meter Power: 9 volt battery or 9V AC adaptor
Auto Power OFF: Meter automatically powers off after 10 minutes of inactivity
Current output capability: 24mA at 1000 ohms
Operating Temperature: 41ºF to 104ºF (5ºC to 40ºC)
Storage Temperature: -4oF to 140oF (-20oC to 60oC)
Operating Humidity: Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC (104ºF)
Storage Humidity: <80%
Operating Altitude: 7000’ (2000m) maximum
Dimensions: 3.8 x 4.7 x 1.8” (96 x 118 x 45mm) folded
Weight: 12 oz. (340g)
Accessories Supplied: 9V battery, AC adaptor and calibration cable with spade lugs

Range Specifications

FIG 4 Range Specifications

Two-year Warranty

FLIR Systems, Inc. warrants this Extech brand instrument to be free of defects in parts and workmanship for two years from date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty text please visit: http://www.extech.com/support/warranties.

Calibration and Repair Services

FLIR Systems, Inc. offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to- date product information: www.extech.com