Tektronix DMM4050 6.5-Digit Precision Bench Multimeter

DMM4050 is a Tektronix 6.5-digit bench multimeter with a basic DC voltage accuracy of up to 0.0024 percent (1 year), dual display, TrendPlot recorder mode and, unlike the sister DMM4040, built-in temperature and capacitance measurement.

Precision readings with a dual display and trend recording

Dual display lets you measure two parameters of one signal from a single test connection, for example AC volts with frequency. Graphical modes show a real-time TrendPlot for hours or days, a histogram for the spread of readings, and statistics (minimum, maximum, average, standard deviation) for a drifting reference or a slowly stabilising supply.

The DMM4050 replaces a separate temperature meter, capacitance meter, counter and continuity tester. The 2 x 4-wire resistance technique and front and rear 2 x 4 inputs suit bench work and rack integration; front-panel buttons give direct access to common functions instead of nested software menus.

Key features as printed in the datasheet

• Voltage 100 mV to 1000 V with up to 100 nV resolution; current 100 µA to 10 A with up to 100 pA resolution.
• Resistance 10 Ω to 1 GΩ with up to 10 µΩ resolution.
• 10,000 readings internal memory, expandable through a front-panel USB memory module.
• Front USB host, rear RS-232, LAN (10/100BASE-T) and GPIB.
• CAT I 1000 V and CAT II 600 V.

Technical specification

DC voltage accuracy ±(% measurement + % of range), DMM4050

Current, resistance and AC

General and environmental

DMM4050 or DMM4040

The two models share a datasheet. The DMM4050 is the one with temperature and capacitance measurement and the tighter DC specifications (the DMM4040 is a 6.5-digit meter with 0.0035 percent 10 V one-year accuracy by comparison). Ordering options are the power plug (A0 North America, A1 Universal Euro, A2 United Kingdom, A3 Australia, A5 Switzerland, A6 Japan, A10 China, A11 India, A12 Brazil, E1 Euro and UK cords) and services: single calibration CA1, five-year repair R5, standard warranty extended to five years SILV100.

Set-up notes

Allow a one-hour warm-up for full uncertainty specifications and observe the 400 mA continuous (550 mA for 2 minutes on, 1 minute off) limit on the mA range. Inputs beyond ±14 V on the DC volts ranges are clamped through about 200 kΩ, so do not rely on the meter as a protection device. The temperature function is valid only in 4-wire RTD mode with a platinum RT100 (385) probe and under 10 Ω lead resistance; probe accuracy must be added.

Calibration labs, training centres and repair benches

A 6.5-digit meter is used to check transmitter simulators, verify 4 to 20 mA loop calibrators, measure reference voltages and sort precision resistors. For a Gulf instrument workshop it gives a traceable-grade bench reference at moderate cost. It is a laboratory meter rated 0 to 55 °C and below 90 percent humidity; the datasheet gives no ingress rating or hazardous-area approval, so keep it in a clean, conditioned area.

Probes, cases and software

Recommended: TL710 premium test leads (supplied), TL705 2 x 4 wire precision lead, TL725 SMD test tweezers, TP750 100 Ω RTD probe (DMM4050 only), HCTEK4321 hard case, RMU2U rack shelf kit and NI LabVIEW SignalExpress Tektronix Edition. See the Portable Test and Measurement category.

Selection and installation notes

Test and measurement instruments are selected from the accuracy, the range and the interfaces the work needs. Allow the warm-up time, use leads and probes rated for the voltage and category of the circuit, keep the inputs inside the stated limits and keep the calibration current according to your quality system. Record the settings used for any test that must be repeated later.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Frequently asked questions

What is the DC accuracy of the DMM4050?

Up to 0.0024 percent of reading plus 0.0005 percent of range on the 10 V range over one year.

What does the DMM4050 have that the DMM4040 lacks?

Temperature and capacitance measurement, and tighter DC accuracy.

Which interfaces are fitted?

USB host on the front, and RS-232, LAN and GPIB on the rear.

What is the maximum current range?

10 A on the front-panel terminal, with 440 mA and 11 A tool-accessible fuses.

Does Seven Star LLC act as a Tektronix distributor?

No, we are an independent supplier in Muscat and supply Tektronix items on request rather than acting as a Tektronix channel partner.

Documents and quotation

Need DMM4050? The Tektronix datasheet is attached to this listing. Seven Star LLC (independent supplier, Muscat) can quote the item and arrange supply on request; list quantity and site location in your enquiry. Verify the code, dimensions and approvals in the document before ordering. Other products are in the category page.