GB GDT-311 User Manual

1
OPERATING INSTRUCTIONS
3 Function, 12 Range Digital Multi-Meter
GDT-311
Read this owners manual thoroughly before use and save.
1.1 FUNCTIONS (Figure 1)
1. 2000 count digital display
2. 14 position
3. AC Volts
4. DC Volts
5. Resistance
6. Off Dial Selection
7. Low Battery Indicator
8. Common Input Jack
9. Positive Input Jack
1.1 METER FUNCTIONS
Meter Type: Manual
Functions: 3
Ranges: 12
Display Count: 2000
Input Impedance: 10 Meg Ohm
AC Volt Ranges: 200 / 500 (2.5% + 5 digits)
DC Volt Ranges: 200m / 2000m / 20 / 200 / 600 ±(1.2% + 2 dgts)
Resistance Ranges: 200 / 2000 / 20k / 200k / 2000k ±(1.5% + 2 dgts)
Operating Environment
Indoor Use
Operating Temperature: 0°C – 40°C
Storage Temperature: -10°C – 50°C
Relative Humidity: 0% – 75%RH (0°C – 31°C)
0% – 50%RH (31°C – 40°C)
Altitude: Up to 2000m
Ingress protection degree: IP40
Pollution degree: 2
Battery Type: 9 Volt
Battery Life: 100 hours with carbon-zinc cells, 200 hours with
alkaline cells under normal conditions.
Overrange Indication: The three least significant digits are blank and
the number “1” is displayed at the left when the
range capacity is exceeded by the input.
Polarity Indication: Negative displayed, positive implied
Size (LxWxH): 5.51" x 2.83" x 1.26"
Weight: Approximately 110g (without batteries)
Test lead type: ETL, cETL, CE, CAT III 600V 1A
Agency Approvals: ETL, CE, CAT III 600V
Note: Accuracy is given for one year at 23°C ± 3°C rH<70%
CONTENTS
1. Meter Functions
2. Read First
2.1 For Your Safety
3. Operating Suggestions
3.1 AC Volts
3.2 DC Volts
3.3 Resistance
4. Battery Replacement
7
3
2
9
4
1
6
5
6
8
1.0 METER FUNCTIONS

GB GDT-311 Specifications

General

Diode Test	Yes
Continuity Buzzer	Yes
Data Hold	Yes
DC Current	10A
Battery	9V

Summary

Meter Functions Overview

Meter Features and Components

Identifies key features like the digital display, dial positions, input jacks, and indicators shown in Figure 1.

Meter Specifications

Details meter type, functions, ranges, display count, input impedance, voltage/resistance ranges, and operating environment.

Important Safety Information

Safety Warnings and Precautions

Provides essential safety rules, handling instructions, and general precautions for using the multimeter safely.

Danger, Warning, and Caution Levels

Explains the meaning of DANGER, WARNING, and CAUTION statements for user safety and instrument protection.

Operating Instructions

AC Voltage Measurement

Guide on how to measure AC voltage using the multimeter, including lead connection and range selection.

DC Voltage Measurement

Instructions for measuring DC voltage, covering lead connection, polarity, and range selection for accuracy.

Resistance Measurement

Steps for measuring resistance, emphasizing power-off conditions and appropriate range selection for components.

Battery Replacement Procedure

Instructions on how to safely replace the multimeter's battery, including precautions before starting.