Urrea UD18, User Manual And Warranty

13

E N G L I S H

it is ON but inactive for more than 30 
minutes. Press any pushbutton or change 
the measurement function to resume 
operation. Standby is not allowed if the 
Meter in the MAX/MIN Recording mode.
To disable Standby mode, press and hold 
down the HOLD pushbutton for 2 seconds 
while pressing the ON/OFF pushbutton.

5. INPUT RANGES

The input range determines the highest 
value that the Meter can measure. Most 
functions have more than one range (see 
Specifications). If the range is too low, the 
display shows OFL (overflow or overload). If 
the range is too high, the display will show 
fewer digits of resolution.

Autoranging.
The Meter defaults to autoranging 
mode when you turn the Meter on. In 
autoranging mode, the Meter selects the 
best range automatically.

Manually Selecting a Range.
The Meter also has a manual range mode. 
In manual range mode, you select and lock 
the Meter in a range.

To manually select range:
1. Press   the meter is locked in the range it 

is in, and   is displayed.

2. Press   to step through the ranges. 

The Meter beeps whenever the range 
changes.

3. To return to autorange, press   for 2 

seconds or change the measurement 
function.   is no longer displayed.

6. GENERAL TESTING AND 

MEASURING

6.1 Measuring Volts

 WARNING:  O AVOID THE RISK OF 

ELECTRICAL SHOCK, INSTRUMENT 
DAMAGE AND/OR EQUIPMENT 
DAMAGE, INPUT VOLTAGES MUST 
NOT EXCEED 750 VOLTS DC OR PEAK 
AD. DO NOT ATTEMPT TO TAKE ANY 
UNKNOWN VOLTAGE MEASUREMENT 
THAT MAY BE IN EXCESS OF 750 
VOLTS DC OR PEAK AC.

1. Insert the leads in the jacks.
2. Set the rotary switch to the voltage 

function. 

3. To toggle between DC and AC, press  .
4. Touch the probes to the test points, and 

read the display. The Meter beeps when 
OFL (overload) is displayed.

6.2 Measuring Resistance.

  CAUTION: TURN OFF POWER AND 

DISCHARGE ALL CAPACITORS ON
CIRCUIT TO BE TESTED BEFORE 
ATTEMPTING IN-CIRCUIT RESISTANCE 
MEASUREMENTS. FAILURE TO DO SO 
MAY END UP IN EQUIPMENT AND/OR 
INSTRUMENT DAMAGE.

1. Insert the test leads in the jacks, and 

turn off power to the circuit under test. 
External voltage across the components 
causes erroneous readings.

2. Set the rotary switch to the Ω function.
3. Touch the probes to the test points, and 

read the display. The Meter beeps when 
OFL (overload) is displayed.

6.3 Testing Continuity and Diodes.
1. Insert the test leads in the jacks.