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SAFETY INFORMATION 

 

EMC: Conforms to EN61326-1. 

The following safety information must be 
observed to insure maximum personal safety 
during the operation of this meter: 
 
Use the meter only as specified in this manual 
or the protection provided by the meter might 
be impaired. 
 
Do not use the meter if the meter or test leads 
look damaged, or if you suspect that the meter 
is not operating properly. 
 
Never ground yourself when taking electrical 
measurements. Do not touch exposed metal 
pipes, outlets, fixtures, etc., which might be at 
ground potential. Keep your body isolated 
from ground by using dry clothing, rubber 
shoes, rubber mats, or any approved 
insulating material. 
 
Turn off power to the circuit under test before 
cutting, unsoldering, or breaking the circuit. 
Small amounts of current can be dangerous. 
 
When using the probes, keep your fingers 
behind the finger guards on the probes. 
 
Measuring voltage which exceeds the limits of 
the multimeter may damage the meter and 
expose the operator to a shock hazard. 
Always recognize the meter voltage limits as 
stated on the front of the meter. 

Summary of Contents for PRO-57

Page 1: ...PRO 57 Tweezer Digital Multimeter OPERATING INSTRUCTIONS...

Page 2: ...easurements Do not touch exposed metal pipes outlets fixtures etc which might be at ground potential Keep your body isolated from ground by using dry clothing rubber shoes rubber mats or any approved...

Page 3: ...ond nominal Auto power off approx 10 minutes Operating environment 0 to 40 32 104 at 70 R H Storage temperature 20 to 60 4 to 140 at 80 R H with battery removed from meter Temperature Coefficient 0 1...

Page 4: ...0 range Overload protection 30VDC or 30AC RMS CAPACITANCE Ranges 3nF 30nF 300nF 3 F 30 F 300 F 3mF 30mF Resolution 1pF Accuracy 3 0 rdg 10 dgts on 3nF to 300 F ranges 5 0 rdg 20 dgts on 3mF to 30mF ra...

Page 5: ...le warning 0 03V Overload protection 30VDC or 30AC RMS OPERATION Before taking any measurements read the Safety Information section Always examine the instrument for damage contamination excessive dir...

Page 6: ...so works as an on off button Depress the button for more than 2 seconds to shut down the meter Depress the button again for more than 1 second to wake up the meter If the meter is turned off with the...

Page 7: ...1 Set the function to or position 2 Turn off power to the circuit under test External voltage across the components causes invalid readings 3 To toggle between the ohms continuity diode modes press M...

Page 8: ...on to position 2 Touch the probes to the capacitor Observe polarity when measuring polarized capacitors 3 Read the capacitance directly from the display 4 Discharge the capacitor before taking capacit...

Page 9: ...y Cancellation Of Auto Power Off Feature Press and hold the RANGE button while moving slide switch from off to any position to turn on the meter The auto power off feature is disabled Note APO indicat...

Page 10: ...d period of time Power is supplied by a 3 volt button type lithium battery x1 CR2032 appears on the LCD display when replacement is needed 1 Set the Function Switch to OFF 2 Remove battery cover screw...

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