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The hand held 440 scope plus features an easy to use combination of a single input 1 MHz oscilloscope with True RMS DMM.

440 True RMS Digital Multimeter

The TPI 440 is a hand-held oscilloscope plus autoranging DMM. The instrument’s large, backlit LCD display shows a reading and waveform simultaneously. In addition to the standard functions of ACV, DCV, ACA, DCA, Ω, Diode Test and Continuity Buzzer; the 440 measures Frequency (Hz),Capacitance, Logic and Component test functions. The 440 also has RS232 output and software for interfacing with a PC is offered as an optional accessory.

  • True RMS Auto Ranging DMM offers increased accuracy over average responding multimeters
  • 1MHz Oscilloscope can be used to view power signals to determine quality as well as correct amplitude and frequency, assisting in finding and preventing problems
  • Trend Mode enables surges and dropouts to be graphed
  • Communication to a PC using optional RS-232 cable and software*
  •  cULus 61010-1

The 440 comes complete with the following accessories:

  • 440 Instrument
  • Standard Test Lead Set
  • Charger/adapter
  • Rechargeable batteries
  • Instruction Manual

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

440 Manual

440 Product Sheet

DMM Selection Guide

£300.00 RRP exc. VAT 

Where to Buy TPI Products

The versatile handheld TPI 440 is a customer winner.

Technicians appreciate the bright backlight of the 3″ x 3″ cold cathode flourescent display and rugged construction inside and out.

6 Instruments in 1:

  • Auto Ranging 4,000 Count True RMS DMM: TPI’s 440 has 9 measurement functions and 0.3% basic DC accuracy.
  • 1 MHz Oscilloscope: View industrial power signals such as motor controls, UPS, switching power supplies, and PLC controls with detail and clarity.
  • Trend Mode: Graph readings over a predetermined time period to check for surges or dropouts.
  • Component Test: Check voltage-current signatures on resistors, capacitors, and semiconductors.
  • Logic Test: Indicates transitions up to 2 MHz.
  • Frequency Counter: Measure low frequency signals from 1Hz to 2 MHz and display duty cycle, pulse width and period.
  • PC/Printer Compatibility to RS-232C Port Optional accessory A402 allows user to download data or waveforms to PC for archiving, processing, and report generation. Ideal for extended monitoring. Please Note: NOT Windows 10 or Mac compatible.

Category Ratings:

  • Category I: Usually electronic equipment or equipment where measures have been taken to limit transient over voltages.
  • Category II: Single phase loads like appliance personal computers, television sets, and other household loads. Outlets located more than 30 feet froma CAT III source or more than 60 feet from a CAT IV source.
  • Category III: Distribution level fixed installations like distribution panel devices, short branch and feeder circuits, three phase loads, and single phase commercial lighting.
  • Category IV: Equipment and lines located on the power line side of a service panel or where a low voltage connection is made to utility power

 Model 440 Specifications
 DC Volts Maximum Input: 1000V
 Maximum Resolution: 0.1mV
 Accuracy: +/-0.05%
 AC Volts Maximum Input: 1000V
 Maximum Resolution: 1mV
 Input Impedence: 1.11MΩ
 DC Amps Maximum Input: 10A
 Maximum Resolution: 0.1μA
 AC Amps Maximum Input: 10A
 Maximum Resolution: 0.1μa
 Resistance (Ohms) Maximum Input: 40MΩ
 Maximum Resolution: 0.1Ω
 Frequency Maximum Input: 2MHz
 Maximum Resolution: 0.01Hz
 Capacitance Maximum Input: 400μF
 Maximum Resolution: 100pF
 Inductance N/A

 (K-Type Thermocouple)

 Continuity Audible
 True RMS Responding Yes
 Conductance Yes
 Pulse Width Yes
 Data Hold Yes
 Min/Max Record Yes
 Time Stamp Logging Yes
 Relative Mode Yes
 Compare Mode Yes
 RS-232 Output Yes
 Process Loop Output No
 Sleep Mode / Auto Off Yes
 Protective Boot No
 Display Type Super-twist LCD, 160 x 240 pixels
 Operating Temperature 0° to 50°C (32° to 122°F)
 Storage Temperature -20° to 60°C (-4° to 140°F)
 Relative Humidity 0% to 80% (0°-35°C/32°-95°F) 0% to 70%: (35°-55°C/95°-131°F)
 Size  52 x 220 x 100mm
 Weight  1 lb. 6 oz
 Power Supply Nicad Battery 7.2V, AA Cell x 8
 Battery Life 5 hours
 OverInput Category CAT III 600V
 Agency Approval cULus 61010-1, IEC 61010-1

TPI 440 Scope Plus Oscilloscope & True RMS Digital Multimeter
Please use the link below to download software for the 440. Optional accessory A402 allows user to download data or waveforms to Microsoft Windows PC for archiving, processing, and report generation. Ideal for extended monitoring.

Please Note: NOT Windows 10 or Mac compatible.

440 Software

TPI Model 440 Demonstration Video

TPI Model 440 Waveforms and Power Quality

Model 440 Applications

  • View industrial signals such as motor control, UPS, switching power supplies, and PLC controls with 1MHz bandwidth
  • Capture noise spikes, glitches, and intermittents with 20 megasamples per second sampling rate
  • Full autoranging, True RMS, DMM capabilities
  • Measure resistance and test for continuity
  • Continually updated display provides a live presentation

Frequently Asked Questions

1. Is there a way to measure higher current with a TPI DMM?

TPI DMMs (except the 120 and 126) have the capacity to read up to 10A AC/DC. Optional adapters are available for all models to increase the current range. Our shunt adapters are available to increase the range up to 1,000A AC/DC.

2. What other adapters are available for TPI DMMs?

Various adapters including carbon monoxide (A771), pressure (A620/630), and clamp-on low current (A254) are available. Contact TPI for additional information.

3. Which of the TPI DMMs will measure temperature?

All TPI DMMs can measure temperature by using the optional A301 K-Type thermocouple temperature adapter.

4. Which TPI DMMs can measure DC millivolts?

All TPI DMMs measure millivolts. Models are available with 1 or 0.1 millivolt resolution.

5. Which TPI DMMs can measure DC microamps?

The TPI 126, 133, 135, 153, 163, 183, 190, 194, 196, and 440 all have this capability.

6. Which TPI DMMs will measure capacitance?

The TPI 135, 183, 190, 192, 194, and 440 all have this capability.

7. What is continuity?

Continuity refers to a test performed on wires and circuits to see if a break(open) exhists. If the wire or circuit is continuous, the resistance reading will be at or near zero. The continuity range on a meter provides audible indication of a continuous circuit, allowing quicker tests without having to take your eyes off the circuit or wire under test.

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