WattMaster WAT115A Operating Instructions

OPERATING INSTRUCTIONS

FOR POCKET

DIGITAL MULTIMETER

WAT115A

SAFETY INFORMATION

The following safety information must be

observed to ensure maximum personal safety

during the operation of this meter.

Do not use if 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 before cutting,

desoldering, or breaking the circuit. Small

amounts of current can be dangerous.

Use caution when working above 60V DC or 

30V AC rms. Such voltages pose a shock 

hazard.

When using the probes, keep fingers behind

the finger guards.

Measuring voltage which exceeds the limits

of the multimeter may cause damage to the

meter and expose the operator to a shock 

hazard. Always be aware of the meter voltage

limits as stated on the front of the meter.

SPECIFICATIONS

Display: 3 

1/4

digit liquid crystal display (LCD)

with a maximum reading of 3999

Polarity: Automatic, positive implied, 

(-) negative polarity indication.

Overrange: “OL” mark indication.

Low Battery Indication: The “           “ is 

displayed when the battery voltage drops below

the operating level.

Measurement Rate: 2 times per second, nominal.

Auto Power Off: approx. 10 minutes.

Operating Environment: 0°C to +40°C at <70%

R.H.

Storage Temperature: -20°C to + 60°C at 

< 80% R.H. with battery removed from meter.

Temperature Co-efficient: 0.1 x (specified 

accuracy) per °C. (0°C to 18°C, 28°C to 40°C).

Power: Two 1.5 button-type batteries 

(IEC# LR-44, NEDA # 1166A).

Battery Life: 70 hours continuous operation.

Dimensions: 125mm (H) x 60mm (W) x 

24mm (D).

Weight: Approx 110g including batteries and 

case.

(Accuracy at 23°C    5°C, <75% R.H.)

+

-

+

-

  Range     Resolution 

      Accuracy                    Input Impedance           Overload Protection

DCV

ACV

(50-60Hz)

OHM

Diode Test

Continuity

NON-CONTACT VOLTAGE INDICATOR: Detects voltage from 70V to 600V AC 50Hz -60Hz

4V                   1mV 

     10M

Ω

40V                 10mV

400V               100mV 

  2.0% rdg + 2dgts 

     9.1M

Ω

600V               1V

4V                   1mV 

     10M

Ω

40V                 10mV

400V               100mV 

 4.0% rdg + 5 dgts 

     9.1M

Ω

600V               1V

400

Ω

               100m

Ω

 2.0% rdg + 5 dgts           Open circuit Volts -1.2 Vdc      

4k

Ω

                 1

Ω

40k

Ω

               10

Ω

2.0% rdg + 4 dgts  

                   450V DC or AC rms

400k

Ω

             100

Ω

4M

Ω

               1k

Ω

3.0% rdg + 4 dgts           Open circuit Volts -0.45 Vdc

40M

Ω

             10k

Ω

5.0% rdg + 5 dgts

2V                   10mV 

3.0% rdg + 3 dgts                   Test current 1.2mA               450V DC or AC rms

400

Ω

               1

Ω

               Audible indication: < 25

Ω

        Response Time: 500ms           450V DC or AC rms

600V DC or AC rms

+ -

+ -

+ -

+ -

+ - + - + -