Fluke 1507 Insulation measuring device, 50 V, 100 V, 250 V, 500 V, 1000 V (+20 %, -0 %) 2427890 Manuale Utente

Making Measurements   

  

13 

Insulation tests should only be performed on de-energized 
circuits. To measure insulation resistance set up the 
Tester as shown in Figure 7 and follow the steps below: 

1.

 

Insert test probes in the 

 and 

 input terminals. 

2.

 

Turn the rotary switch to the desired test voltage. 

3.

 

Connect the probes to the circuit to be measured. The 
Tester automatically detects if the circuit is energized. 

• 

The primary display shows 

-

 

-

 

-

 

-

 until you press 

T

 and a valid insulation resistance reading 

is obtained. 

• 

The high voltage symbol (

Z

) along with a primary 

display of >30 V warns if voltage more than 30 V 
ac or dc is present. In this condition, the test is 
inhibited. Disconnect the Tester and remove 
power before proceeding. 

4.

 

Push and hold 

T

 to start the test. The secondary 

display shows the test voltage applied to the circuit 
under test. The high voltage symbol (

Z

) along with a 

primary display showing the resistance in M

Ω

 or G

Ω

 

appears. The 

t

 icon appears on the lower portion of 

the display until 

T

 is released.  

When resistance is higher than the maximum display 
range, the Tester displays the 

Q

 symbol and the 

maximum resistance for the range. 

5.

 

Keep the probes on the test points and release the 

T

 button. The circuit under test then discharges 

through the Tester. The resistance reading appears 
on the primary display until a new test is started or a 
different function or range is selected or > 30 V is 
detected.