REED ST-333 Instruction Manual Download Page 6

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Function 

Range & Resolution

Accuracy (% of reading)

Capacitance

40.00nF

±(5.0% r 10 digits)

400.0nF

±(3.0% r 5 digits)

4.000μF

±(3.5% r 5 digits)

40.00μF
100.0μF

±(5.0% r 5 digits)

Frequency

5.000Hz

±(1.5% r 5 digits)

50.00Hz

±(1.2% r 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% r 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% r 5 °C)

400 to 1300°C

400 to 1000°C

1000 to1300°C

±(3.0% r 5°C)

-58.0 to 400.0°F

-50.0 to 0°F

± 14°F

0 to 400.0°F

±(3.0% r 7°F)

400 to 2372°F

400 to 1832°F

1000 to1300°F

±(3.0% r 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)

continued ...

Summary of Contents for ST-333

Page 1: ...reedinstruments www com Model ST 335 400A AC Clamp Meter Instruction Manual...

Page 2: ...ns 9 11 AC Current Measurements 9 DC AC Voltage Measurements 9 A DC AC Current Measurements 10 Resistance Continuity Measurements 10 Diode Measurements 10 Capacitence Measurements 11 Frequency or duty...

Page 3: ...eter 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 vo...

Page 4: ...sistance 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 use...

Page 5: ...ution Accuracy of reading DC Current 400 0 A 1 5 3 digits 4000 A AC Current 400 0 A 2 0 5 digits 4000 A 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 0...

Page 6: ...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...

Page 7: ...fety 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 Overvoltag...

Page 8: ...ions 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...

Page 9: ...ion switch to the 400A 40A or 4A range If the range of the measured is not known select the higher range first then move to the lower range if necessary 2 Press the trigger to open jaw Fully enclose o...

Page 10: ...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 discon...

Page 11: ...anana 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...

Page 12: ...turned on Press the HOLD key again to exit Hold Zero Button For DCA and Capacitance Zero Offset adjustment Manual Ranging The meter turns on in the autoranging mode Press the Range button to go to man...

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