Reed ST-333 User Manual
Contents
1. 8 10 digits 300 0 400 0AAC 6 10 digits 400 0 mVDC 0 8 3 digits 4 000 VDC DC Voltage 40 00 VDC 1 5 3 digits 400 0 VDC 600 VDC 2 0 3 digits 400 0 mVAC 1 0 10 digits 4 000 VAC AC Voltage 40 00 VAC 2 0 5 digits 400 0 VAC 600 VAC 2 0 5 digits 400 0 Q 1 0 4 digits 4 000KQ 40 00KQ 1 5 2 digits Resistance 400 0KQ 4 000MQ 2 5 3 digits 40 00MQ 3 5 5 digits 40 00nF 5 0 reading 30 digits 400 0nF 3 0 reading 5 digits apacitance EE 3 5 reading 5 digits 100 0uF 5 0 reading 5 digits 5 000Hz 1 5 reading 5 digits te 1 2 reading 2 digits Frequency 5 000kHz Sensitivity 5 5kHz 10Vrms min 50 00kHz pie SOc Om min 20 150 0kHz to 80 duty cycle 0 5 to 99 0 1 2 reading 2 digits Duty Cycle Pulse width 100us 100ms Frequency 5Hz to 150kHz Sensitivity 5 5kHz 10Vrms min 5kHz 150kHz 40Vrms min 50 0 to 400 0 C 50 0 to 20 0 C 7 C 20 0 to 400 0 C 6 4 Past isi 400 to 1000C 400 to 100 C 419 0 reading 370 prone 3 50 0 to 0 F 14 F not included 58 0 to 400 0 F 0 to 400 0 F 3 0 reading 7 F 400 to 1832 F 400 to 1832 F das owowreedimstrumemts com Specifications con t Clamp Size Diode Test Continuity Check Low Battery Indication Overrange Indication Measurements Rate Input Impedance Display AC Current AC Voltage Bandwidth Operating Temperature Storage Tempera2. 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 ass reedinstruments com 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 PF Q 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 lt 1509 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 P position 3 Press the MODE button until P appears in the display 4 Touch the test probes to the diode under test Forward voltage will
3. indicate 0 4V to 0 7V Reverse voltage will indicate OL Shorted devices will indicate near OmV and an open device will indicate OL in both polarities Red Black Black Red Probe Probe Probe Probe Forward test Reverse test Capacitance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords 1 Set the rotary function switch to the cap position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Touch the test leads to the capacitor to be tested 4 Read the capacitance value in the display Raa owowreedimstrumemts com 9 Freguency or duty cycle measurements 1 Set the rotary function switch to the VDC AC Hz position 2 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack 3 Select Hz or duty with the Hz button 4 Touch the test probe tips to the circuit under test 5 Read the frequency on the display Temperature Measurements WARNING To avoid electric shock disconnect both test probes from any source of voltage before making a temperature measurement 1 Set the function switch to TEMP 2 Insert the Temperature Probe into the negative COM and the V jacks making sure to observe the
4. the protection provided by the equipment may be impaired Input Limits Function Maximum Input AAC A DC 400A 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 ass reedinstruments com 1 Meter 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 Q C F Jack 12 Battery Cover Display Descriptions 1 DC Direct Currrent AC Alternating Current AUTO PF 1 HOLD ZEROKMO Hz TUF mV IMs jy NN TE 2 mmm Minus Sign IT jy N 1 4000 Count LI N II 0 to 3999 Measurement Reading AUTO AutoRange Mode ZERO ZERO Mode gt t Diode Test Mode en Audible Continuity HOLD Data Hold Mode C F m VA K M Q Units of Measure List Raa oowreedimstrumemts com 5 a 100 E o OI E Specifications Function Range amp Resolution 0 20 00ADC 2 5 6 digits DC Current 0 00 ARG 20 00 40 00ADC 8 6 digits 400 0 ADC 0 300 0ADC 2 5 6 digits 300 0 400 0ADC 3 5 6 digits 0 20 00AAC 3 10 digits AC Current 40 00 AAG 20 00 40 00AAC 5 10 digits 400 0 AAC 0 300 0AAC
5. correct polarity 3 Select C or F with the MODE button 4 Touch the Temperature Probe head to the part whose temperature you wish to measure Keep the probe touching the part under test until the reading stabilizes about 30 seconds 5 Read the temperature in the display The digital reading will indicate the proper decimal point and value WARNING To avoid electric shock be sure the thermocouple has been removed before changing to another measurement function Data Hold To freeze the LCD meter reading press the data hold button The data hold button is located on the left side of the meter top button While data hold is active the HOLD display icon appears on the LCD Press the data hold button again to return to normal operation Note The HOLD feature will activate when the Backlight is turned on Press the HOLD key again to exit Hold www reedinstruments com 10 Backlight Press and hold the HOLD the key for gt 1 second to turn on or off the display backlight function Note The HOLD feature will activate when the Backlight is turned on Press the HOLD key again to exit Hold Zero Button For DCA and Capacitance Zero amp Offset adjustment Manual Ranging The meter turns on in the autoranging mode Press the Range button to go to manual ranging Each press of the range button will step to the next range as indicated by the units and decimal point location Press and hold the Range button for two seconds to
6. ST 333 400A AC DC o Clamp Meter CLAMP METER N REED ZERO ST 333 400A 40A 400A 40A Instruction Manual www reedinstruments com Table Of Contents DOLLY sey EE HO ES dus 3 4 Meter DescriplOn seg ge ee aaraa Ee eg Pe aes 5 SPCCHICATIONS sx ive ce OE RE N 6 7 OperatinglnstruEtIGNS ser se SERE ee di dete elas 8 11 AC DC Current Measurements ese ee ee ee ee ee ee ee 8 DC AC Voltage MeasurementS iese ee ee ee ee ee ee 8 Resistance amp Continuity Measurements ee ee ke ee ee ee 9 Diode Measurernente sd esse RE Misi ER ee GEE ede Ee EED EN Ee 9 Capacitence Measurements ee ee Re ee ee ee ee ee 9 Frequency or duty cycle Measurements ese ese se ee ee 10 Temperature MeasurementS iese ek ek kk ke ke ee ee 10 DATE nle EE EE 10 Baklei Ge vis Ge BE EG GR OE GEGEE 11 Zero BUO N AA EE EE 11 ManualRanging ie iS ed GE ee N Ee Es oe ee Pe Ee ee 11 Battery Replacement ie AR RE AA ke Re ek ke ee ee ee 11 ass reedinstruments com gt 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 DO Double insulation Safety Notes e Do not exceed the maximum allowable input range of any function e Do not apply voltage to meter when resistance function is selected e Set t
7. he function switch OFF when the meter is not in use Warnings e Set function switch to the appropriate position before measuring e When measuring volts do not switch to current resistance modes e Do not measure current on a circuit whose voltage exceeds 240V e When changing ranges using the selector switch always disconnect the test leads from the circuit under test e 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 e 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 ass reedinstruments com 3 Cautions con t e Repair or replace any damage before use e 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 e 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 difficult 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 specified by the manufacturer
8. return to autoranging Manual ranging does not function in the AC Current Diode and Continuity check functions Battery Replacement 1 Remove the one rear Phillips head screw 2 Open the battery compartment 3 Replace the required two AAA batteries UM4 R03 4 Re assemble the meter For service on this or any other REED product contact REED Instruments at 1 800 561 8187 or info reedinstruments com www rFeedinstruments com 11
9. ture Relative Humidity Altitude Over Voltage Battery Auto OFF Dimensions Weight Safety Opening 0 9 23mm approx Test current of 0 3mA typical Open circuit voltage 1 5V DC typical Threshold lt 150Q Test current lt 1mA 8 is displayed OL is displayed 2 per second nominal 7 8MQ VDC and VAC 4000 counts LCD 50 60Hz AAC 50 400Hz VAC 14 to 122 F 10 to 50 C 14 to 140 F 30 to 60 C 90 0 C to 30 C 75 30 C to 40 C 45 40 C to 50 C Operating 3000m Storage 10 000m Category III 600V Two 1 5V AAA Batteries approx 30 minutes 200 x 50 x 35mm 200g For indoor use and in accordance with Overvoltage Category Il Pollution Degree 2 Category II includes local level appliance portable equipment etc with transient overvoltages less than Overvoltage Cat III Raa owowreedimstrumemts com 7 Operation NOTICE Read and understand all warning and precaution state ments 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 DC 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 400ADC 40ADC 400AAC or 40AAC range If the range of the measured is not known select the higher range first then move to the lower range if necessary 2
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