REED ST-335 Manual de usuario

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Model ST-335

400A

AC Clamp Meter

Instruction

Manual

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Table of Contents

Safety .........................................................................................3-4

Features......................................................................................... 5

Specications.............................................................................5-7

Instrument Description...............................................................7-8

Operating Instructions..............................................................9-11

AC Current Measurements.......................................................... 9

DC/AC Voltage Measurements.................................................... 9

µA DC/AC Current Measurements ............................................ 10

Resistance & Continuity Measurements .................................... 10

Diode Measurements................................................................ 10

Capacitence Measurements ..................................................... 11

Frequency or % duty cycle measurements ................................ 11

Temperature Measurements...................................................... 11

Data Hold ................................................................................. 12

Backlight................................................................................... 12

Zero Button............................................................................... 12

Manual Ranging........................................................................ 12

Battery Replacement................................................................... 12

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Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates

the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal

use, hazardous voltages may be present

Double insulation

Safety Notes

• Do not exceed the maximum allowable input range of any function.

• Do not apply voltage to meter when resistance function is selected.

• Set the function switch OFF when the meter is not in use.

Warnings

• Set function switch to the appropriate position before measuring.

• When measuring volts do not switch to current/resistance modes.

• Do not measure current on a circuit whose voltage exceeds 240V.

• When changing ranges using the selector switch, always disconnect

the test leads from the circuit under test.

• Do not exceed the maximum rated input limits.

Cautions

Improper use of this meter can cause damage, shock, injury or death.

Read and understand this user manual before operating the meter.

• Always remove the test leads before replacing the battery. Inspect the

condition of the test leads and the meter itself for any damage before

operating the meter.

continued ...

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Cautions con’t

• Repair or replace any damage before use.

• Use great care when taking measurements when the voltages are

greater than 25VAC rms or 35VDC. These voltages are considered

a shock hazard.

• Remove the battery if the meter is to be stored for long periods.

• Always discharge capacitors and remove power from the device under

test before performing Diode, Resistance or Continuity tests.

• Voltage checks on electrical outlets can be difcult and misleading

because of the uncertainty of connection to the recessed electrical

contacts. Other means should be used to ensure that the terminals

are not “live”.

• If the equipment is used in a manner not specied by the manufacturer,

the protection provided by the equipment may be impaired.

Input Limits

Function Maximum Input

A AC 400A

μA DC, μA AC 200mA 250V fast

acting fuse

V DC, V AC, Frequency, Duty Cycle 600V DC/AC

Resistance, Diode, Continuity,

Capacitance Test 250V DC/AC

Temperature (°C/°F) 60V DC/24V AC

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Features

• High resolution, 0.1μA

• Temperature range to 1832°F/1000°C

• LCD display with backlight

• Data Hold and zero function

• Auto shut off and low battery indication

• Resistance to 20MΩ

• Diode test to 0.3mA

Specifications

Function Range & Resolution Accuracy (% of reading)

DC Current 400.0μA ± (1.5% + 3 digits)

4000μA

AC Current

400.0μA ± (2.0% + 5 digits)

4000μA

4.000 AAC ± (2.5% + 10 digits)

40.00 AAC

400.00 AAC ± (2.0% + 5 digits)

DC Voltage

400.0 mVDC ± (0.8% + 3 digits)

4.000 VDC

± (1.5% + 3 digits)40.00 VDC

400.0 VDC

600 VDC ± (2.0% + 3 digits)

AC Voltage

400.0 mVAC ± (0.8% + 10 digits)

4.000 VAC

± (2.0% + 5 digits)

40.00 VAC

400.0 VAC

600 VAC

Resistance

400.0 Ω ± (1.0% + 4 digits)

4.000KΩ

± (1.5% + 2 digits)40.00KΩ

400.0KΩ

4.000MΩ ± (2.5% + 3 digits)

40.00MΩ ± (3.5% + 5 digits)

continued ...

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Function Range & Resolution Accuracy (% of reading)

Capacitance

40.00nF ±(5.0% reading + 10 digits)

400.0nF ±(3.0% reading + 5 digits)

4.000μF ±(3.5% reading + 5 digits)

40.00μF

100.0μF ±(5.0% reading + 5 digits)

Frequency

5.000Hz ±(1.5% reading + 5 digits)

50.00Hz ±(1.2% reading + 2 digits)

Sensitivity: 5~5kHz:10Vrms min.

5kHz~150kHz:40Vrms min.

@ 20% to 80% duty cycle

500.0Hz

5.000kHz

50.00kHz

150.0kHz

Duty Cycle

0.5 to 99.0% ±(1.2% reading + 2 digits)

Pulse width: 100μs - 100ms, Frequency: 5Hz to 150kHz

Sensitivity: 5~5kHz:10Vrms min.5kHz~150kHz:40Vrms min.

@ 20% to 80% duty cycle

Temp (type-K)

(probe accuracy

not included)

-50.0 to 400.0°C -50.0 to -20.0°C ± 7°C

-20.0 to 400.0°C ±(3.0% reading + 5 °C)

400 to 1300°C 400 to 1000°C

1000 to1300°C ±(3.0% reading + 5°C)

-58.0 to 400.0°F -50.0 to 0°F ± 14°F

0 to 400.0°F ±(3.0% reading + 7°F)

400 to 2372°F 400 to 1832°F

1000 to1300°F ±(3.0% reading + 10°F)

Clamp Size Opening 0.9” (23mm) approx

Diode Test Test current of 0.3mA typical;

Open circuit voltage 1.5V DC typical

Continuity Check Threshold <100Ω; Test current < 1mA

Low Battery Indication “ ” is displayed

Overrange Indication “OL” is displayed

Measurements Rate 2 per second, nominal

Input Impedance 7.8MΩ (VDC and VAC)

Display 4000 counts LCD

AC Current 50/60Hz (AAC)

AC Voltage Bandwidth 50/400Hz (VAC)

Operating Temperature 14 to 122°F (-10 to 50°C)

Storage Temperature -14 to 140°F (-30 to 60°C)

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Relative Humidity 90% (0°C to 30°C); 75% (30°C to 40°C);

45% (40°C to 50°C)

Altitude Operating: 3000m; Storage 10,000m

Over Voltage Category III 600V

Battery Two 1.5V “AAA” Batteries

Auto OFF approx. 30 minutes

Dimensions/Weight 200 x 50 x 35mm/200g

Safety

For indoor use and in accordance with Overvoltage

Category II, Pollution Degree 2. Category II includes

local level, appliance, portable equipment, etc., with

transient overvoltages less than Overvoltage Cat. III

Instrument Description

1 — Current Clamp

2 — Clamp Trigger

3 — Rotary Function Switch

4 — LCD Display

5 — ZERO Button

6 — Data Hold and Backlight Button

7 — Mode Select Button

8 — Range Delect Button

9 — Hz/% Duty Button

10 — COM Input Jack

11 — V Ω μA °C/°F Jack

12 — Battery Cover

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Display Descriptions

1. DC Direct Currrent

AC Alternating Current

2. Minus Sign

3. 4000 Count (0 to 3999)

Measurement Reading

4. AUTO AutoRange Mode

5. ZERO ZERO Mode

6. Diode Test Mode

7. Audible Continuity

8. HOLD Data Hold Mode

9. °C/°F, m, V, A, K, M, Ω Units of Measure List

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Operation

NOTICE: Read and understand all warning and precaution

statements listed in the safety section of this operation manual prior

to using this meter. Set the function select switch to the OFF position

when the meter is not in use.

AC Current Measurements

WARNING: Ensure that the test leads are disconnected from the meter

before making current clamp measurements.

1. Set the Function switch to the 400A, 40A or 4A range. If the range of

the measured is not known, select the higher range rst then move to

the lower range if necessary.

Press the trigger to open jaw. Fully enclose one conductor to be measured.

3. The clamp meter LCD will display the reading.

DC/AC Voltage Measurements

1. Insert the black test lead into the negative COM terminal and the red

test lead into the positive V terminal.

2. Set the function switch to the V position.

3. Select AC or DC with the MODE button.

4. Connect the test leads in parallel to the circuit under test.

5. Read the voltage measurement on the LCD display.

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µA DC/AC Current Measurements

1. Insert the black test lead into the negative COM terminal and the red

test lead into the positive µA terminal.

2. Set the function switch to the μA position.

3. Select AC or DC with the MODE button.

4. Remove power from the circuit under test, then open up the circuit at

the point where you wish to measure current.

5. Touch the black test probe tip to the negative side of the circuit.

6. Touch the red test probe tip to the positive side of the circuit.

7. Apply power to the circuit.

8. Read the current in the display.

Resistance and Continuity Measurements

1. Insert the black test lead into the negative COM terminal and the red

test lead into the positive terminal.

2. Set the function switch to the position.

3. Use the multifunction MODE button to select resistance.

4. Touch the test probe tips across the circuit or component under test.

It is best to disconnect one side of the device under test so the rest of

the circuit will not interfere with the resistance reading.

5. For Resistance tests, read the resistance on the LCD display.

6. For Continuity tests, if the resistance is < 100Ω, a tone will sound.

Diode Measurements

1. Insert the black test lead banana plug into the negative COM jack and

the red test lead banana plug into the positive diode jack.

2. Turn the rotary switch to the position.

3. Press the MODE button until “ ” appears in the display.

4. Touch the test probes to the diode under test. Forward voltage will

indicate 0.4V to 0.7V. Reverse voltage will indicate “OL”. Shorted

devices will indicate near 0mV and an open device will indicate “OL”

in both polarities.

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