TIS258 Digital Multimeter

1.0 Introduction

Thank you for purchasing the TIS258. The TIS258 Digital Multimeter is a 3 1/2-digit multimeter with the following capabilities / functionality:

2.0 Accessories

• Test lead(s) (Red + Black)
• 9V PP3 alkaline battery
• User Manual

3.0 Safety Instructions

⚠ WARNING:

Please read and follow the following:

• Before using the instrument, test leads and/or adaptors, ensure there are no signs of damage as this could result in electrical shock and/or inaccurate results.
• Once the battery indicator appears, please replace the battery. A low battery level can produce inaccurate results.
• Do not use/store the instrument in high temperature, humid, flammable, or electromagnetic environments as this could result in injury, damage to the instrument, and/or inaccurate results.
• If the instrument/equipment is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired.
• Do not connect test leads to live systems or hazardous voltages unless stated within the manual.

3.1 Safety Symbols

3.2 Warranty

NEW INSTRUMENTS HAVE A WARRANTY PERIOD OF: 1 YEAR FROM THE DATE OF PURCHASE BY THE USER.

(A copy of the original purchase invoice may be requested to validate the purchase date).

This warranty period includes parts and labor only.

Any unauthorized repair/adjustment will void the warranty.

For service / calibration / repair requirements, please contact:

TEST INSTRUMENT SOLUTIONS LIMITED
UNIT 12/14, LUDDITE WAY BUSINESS PARK
RAWFOLDS WAY
CLECKHEATON
BD19 5DQ

Tel: 01274 752407

Email: SALES@TIS-TIC.CO.UK

4.0 Instrument Layout, display information & symbols

The TIS258 multimeter features the following components:

• 1. LCD display
• 2. Select Button (Switch the measurements of AC, DC current; Temperature, Diode & Continuity check)
• 3. MAX Hold button
• 4. Rotary / Function Selector Switch
• 5. 10A, Input Terminal
• 6. LED Indicator
• 7. Backlight Button
• 8. Data Hold Button
• 9. COM, Input Terminal
• 10. V,Ω,mA, Input Terminal

[Diagram of TIS258 multimeter with numbered parts 1-10]

5.0 Description of Measurement Operation

AC / DC Voltage Measurement

1. Set the rotary switch to the voltage position (V=/ V~).
2. If required, press the Select button to change the voltage measurement from DC V= to AC (V~).
3. Insert the black test lead banana plug into the negative COM input terminal & insert the red test lead banana plug into the positive V/ΩmA input terminal.
4. Connect test leads to the conductors to be tested.
5. Read the voltage in the LCD display.

PLEASE NOTE: The polarity of the red test lead must be connected to the positive conductor to indicate a positive voltage measurement when conducting DC voltage measurements.

AC/DC Current Measurement

1. Select the rotary switch to the appropriate current measurement function & range.
2. Insert the black test lead banana plug into the negative COM input terminal.
3. To perform current measurements less than 200mA, insert the red test lead banana plug into the mA input terminal. For current measurements between 200mA to 10A, insert the red test lead banana plug into the 10A input terminal.
4. Disconnect the circuit under test, then connect the test leads in series with the circuit.
5. Turn the power on and read the measurement value displayed.

If OL (Over Limit) is displayed, increase the measurement range / function.

Diode Test

1. Set the rotary switch to the [Diode symbol] position.
2. Connect the black test lead to the "COM" terminal and the red test lead to the "V:Ω" input terminal.
3. Press the "SEL" button to select the diode function (If required).
4. Connect the test leads to the diode, testing both the "Forward Bias & Reverse Bias" of the diode under test.

Open circuit measurements will be indicated as OL on the display.

Continuity Indication / Buzzer Test

1. Set the rotary switch to the [Buzzer symbol] position.
2. Connect the black test lead to the "COM" terminal and the red test lead to the "V:Ω" input terminal.
3. Press the "SEL" button to select the continuity function (If required).
4. Connect test leads to the circuit under test.

Measurement will be displayed and the audible indicator will sound when measurements are under 70Ω ±30Ω.

Resistance Measurement

1. Set the rotary switch to the required resistance range.
2. Insert the black test lead banana plug into the negative COM input terminal & insert the red test lead banana plug into the positive V/ΩmA input terminal.
3. Connect test leads/probes to the measuring points.
4. Read resistance measurement displayed on the LCD.

If OL (Over Limit) is displayed, increase the measurement range / function.

Temperature Measurement

1. Set the rotary switch to the "°C°F" function.
2. Select the measurement type by pressing the "SEL" button.
3. Connect the thermocouple by inserting the black lead into the COM input terminal & insert the red lead into the V/ΩmA input terminal.
4. Place the thermocouple either on or in the vicinity of the object/room under test.
5. Wait while measurement stabilizes.
6. Read temperature measurement displayed on the LCD.

6.0 Technical Specifications

DC Voltage

Overload Protection: 200mV Range at 250V AC/DC; Other ranges at 600V AC/DC

AC Voltage

Overload Protection: 600V AC/DC

Frequency range: 40~400Hz

DC Current

Overload protection: fuse F200mA; fuse F10A

AC Current

Overload protection: fuse F200mA; fuse F10A

Resistance

Diode and Continuity

Temperature

7.0 Installation / Replacement of Battery & Fuse Protection

⚠ WARNING:

• To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers.
• To avoid electric shock, do not operate the meter until the battery and fuse covers are in place and fastened securely.

Battery Installation / Replacement

To avoid false readings, replace the battery as soon as the battery indicator appears.

1. Turn power off and disconnect the test leads from the meter.
2. Open the rear battery cover.
3. Insert the battery into the battery holder, observing the correct polarity.
4. Put the battery cover back in place & secure.

Replacing the Fuse(s)

1. Turn power off and disconnect the test leads from the meter.
2. Remove the battery cover and the battery.
3. Remove the screws securing the rear cover.
4. Remove the defective fuse and install an identical fuse (F200mA or F10A Fuse).
5. Replace and secure the rear cover, battery, and battery cover.