REED ST-5500 Instruction Manual Download Page 9

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Power Tools & Small Appliances

This test would also apply to 
other similar equipment that 
has a line cord. For double 
insulated power tools, the 
megohmmeter lead shown 
(See graphic on page 8) 
connected to the housing 
would be connected to 
some metal part of the tool 
(ie: chuck, blade). Note:The 
switch of the device must 
be in the “ON” position and 
the main power should be 
disconnected.

Motors

AC-Disconnect the motor from the line by disconnecting the wires at  the 
motor terminals or by opening the main switch. If the main switch is  used 
and the motor also has a starter then the starter must be held, by some 
means, in the “ON” position. In the latter case, the measured resistance 
will include the resistance of the motor, wire and all other components be

-

tween the motor and the main switch. If a weakness is in dicated, the mo

-

tor and other components should be checked individually. If the motor is 
disconnected at the motor terminals, connect one megohmmeter lead to 
the grounded motor housing and the other lead to One of the motor leads. 
DC-Disconnect the motor from the line. To test the brush rigging,field 
coils and armature connect one megohmmeter lead to the grounded 
motor housing and the other lead to the brush on the commutator. If the 
resistance measurement indicates a weakness,raise the brushes off the 
commutator and separately test the armature, field coils and brush rigging 
by connecting one megohmmeter lead to each of them individually, leav

-

ing the other connected to the grounded motor housing. The above also 
applies to DC Gemerators. 

 

REED Instruments

1-877-849-2127 | [email protected] | www.reedinstruments.com

Summary of Contents for ST-5500

Page 1: ...reedinstruments www com Model ST 5500 Digital Insulation Tester Instruction Manual REED Instruments 1 877 849 2127 info reedinstruments com www reedinstruments com...

Page 2: ...k the test leads 7 Battery replacement 7 Measurements 7 8 Insulation Resistance Measurements 7 Low Resistance Measurements 8 AC DC Voltage Measurements 8 Power Tool Small Appliances 9 Motors 9 Cables...

Page 3: ...may be impaired Read the operating instructions before use and follow all safety Information Caution when working with voltages above 60V DC or 30V AC RMS Such voltages pose a shock hazard Before tak...

Page 4: ...k 200M 250V 200M 500V 2000M 1000V 750V ACV 1000V DCV Sampling Rate 2 5 times per second Zero Adjustment Automatic adjustment Over Range Indicator Number 1 of highest digit is displayed Low Battery Ind...

Page 5: ...urrent 200mA DC Voltage Range Resolution Accuracy Input Impedance Overload Protection 1000V 1V 0 8 3 10M 1000Vrms AC Voltage 40Hz 400Hz Range Resolution Accuracy Input Impedance Overload Protection 75...

Page 6: ...lack lead into the COM terminal 2 On 200 and ACV Range Connect the red test lead into the V terminal and the black lead into terminal COM How to check the test leads Set the range select switch to the...

Page 7: ...t have at least fifty outlets an outlet being a switch socket lighting point etc A switched socket counts as one outlet The minimum accept able insulation resistance is 1M For a large installation the...

Page 8: ...ton Set the LOCK button to lock test voltage pressing it again will turn the tester off Low Resistance Continuity Measurements 1 Set the range switch to 200 Position 2 Connect the red test lead to the...

Page 9: ...the motor wire and all other components be tween the motor and the main switch If a weakness is in dicated the mo tor and other components should be checked individually If the motor is disconnected...

Page 10: ...ecting one megohmmeter lead to a ground and or lead sheather and the other megohmmeter lead to each of the conductors in turn Check insulation resistance between conductors by connecting megohmmeter l...

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