Fluke 1503 Insulation measuring device, 500V, 1000 V (+20%, -0%) 2427883 User Manual

4 

To alert you to the presence of a potentially hazardous 
voltage, when the Tester detects a voltage 

≥

 30 V in 

insulation test, 

≥

 2 V in resistance, or a voltage overload 

(

OL

), the 

Z

 symbol is displayed.  

The Tester enters the “Sleep mode” and blanks the 
display if there is no function change or button press for 
10 minutes. This is done to conserve battery power. The 
Tester comes out of Sleep mode when a key is pressed or 
when the rotary switch is turned. 

The 10 minute timer is disabled during any insulation 
resistance or earth bond resistance measurement. The 
time period starts immediately following any 
measurement. 

Turn the Tester on by selecting any measurement 
function. The Tester presents a standard display for that 
function (range, measurement units, modifiers, etc.). Use 
the blue button to select any rotary switch alternate 
functions (labelled with blue letters). Rotary switch 
selections are shown in Figure 1 and described in Table 2. 

 

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