Mastech MAS830L Operator's Instruction Manual

FRONT PANEL DESCRIPTION







Display
3 1/2 digit, 7 segment, 15mm high LCD.
Back light (ONLY MAS830L)
When this button is pushed, the Back light of display is on.
After about 5 seconds, the Back light is self-off. The Back
light is on again, just push this button once.
Rotary switch
This switch is used to select functions and desired ranges as
well as to turn on/off the meter.
Hold button
When this button is pushed, the display will keep the last
reading and “ ” symbol will appear on the LCD until
pushing it again.
“10A” jack
Plug in connector for red test lead for 10A measurement.
“COM” jack
Plug in connector for black (negative) test lead.
“V

mA” jack
Plug in connector for red (positive) test lead for voltage,
resistance and current (except 10A) measurements.
SPECIFICATIONS
Accuracy is specified for a period of one year after calibration and at 18 to 28℃(64F to 82F) with
relative humidity to 80%.
GENERAL
Maximum voltage between
terminals and earth ground
:CAT
Ⅱ
600V
Fuse protection
:F 200mA/250V
Power
:9V battery, NEDA 1604 or 6F22
Display
: LCD, 1999 counts, updates 2-3/ sec.
Measuring method
:Dual-slope integration A/D
converter
Overrange Indication
:Only figure “1” on the display
Polarity indication
:“-”displayed for negative polarity
Operating Environment
:0 to 40
℃
-4-
Storage temperature
:-10℃ to 50℃.
Low battery indication
:“ ”appears on the display
Size
:138mm×69mm×31mm
Weight
: Approx.170g.
DC VOLTAGE
Range
Resolution
Accuracy
200mV
100

V

0.5% of rdg

2 digits
2V
1mV
0.5% of rdg  2 digits
20V
10mV
0.5% of rdg  2 digits
200V
100mV
0.5% of rdg  2 digits
600V
1V

0.8% of rdg

2 digits
Overload Protection: 250V rms. For 200mV range and 600V dc or rms. ac for other ranges.
DC CURRENT
Range
Resolution
Accuracy
200A
0.1A
1% of rdg  2 digits
2mA
1

A

1% of rdg

2 digits
20mA
10

A

1% of rdg

2 digits
200mA
100A
1.5% of rdg  2 digits
10A
10mA
3% of rdg  2 digits
Overload Protection: F 200mA/250V fuse. (10A range unfused)
AC VOLTAGE
Range
Resolution
Accuracy
200V
100mV

1.2 % of rdg

10 digits
600V
1V
1.2 % of rdg  10 digits
Overload Protection: 600V dc or rms. ac for all ranges.
Frequency range: 40Hz to 400Hz. Response: Average responding, calibrated in rms. of a sine
wave.
DIODE & CONTINUITY
Range
Description
If continuity exists (about less than 1.5k

), built-in buzzer
will sound.
Show the approx. forward voltage drop of the diode.
-5-

Mastech MAS830L Specifications

General

DC Voltage Range	200mV/2V/20V/200V/600V
AC Voltage Range	200V/600V
Resistance Range	200Ω/2kΩ/20kΩ/200kΩ/2MΩ
Continuity Buzzer	Yes
Diode Test	Yes
Transistor Test	Yes
Power Supply	9V battery
Display	LCD
DC Current Range	200μA/2mA/20mA/200mA/10A
Dimensions	138mm x 69mm x 31mm