PROFESSIONAL DIGITAL MULTIMETER JT2003

Jaltest Professional Digital Multimeter JT2003 (SKU 50002003) — $245

The Jaltest Professional Digital Multimeter JT2003 (part 50002003, $245) is an industrial-grade digital multimeter purpose-built for professional diagnostic work on commercial vehicles, construction equipment, and agricultural machinery. Per the official Cojali/Jaltest pricelist, it carries an IP65 protection rating (dust-tight and water-jet resistant) and is 2-meter drop-proof — the specs that matter when you are probing circuits under a truck or on a piece of field equipment. This is not a hardware store meter; it is a CAT III 1000V / CAT IV 600V rated instrument built for the electrical environments diesel technicians work in every day.

What the JT2003 Measures

The JT2003 is a 3 5/6 digit True RMS multimeter with a large multi-display screen and auto-ranging. It measures and tests:

• AC voltage and DC voltage
• AC current and DC current
• Resistance
• Diode testing
• Continuity
• Capacitance
• Frequency
• Duty cycle
• Temperature (selectable degrees C or degrees F)
• Motor phase voltage

Built for Harsh Environments

Per the Jaltest pricelist, the JT2003 is specifically designed to operate in petroleum, chemical, strong electromagnetic field, and other harsh working environments. Modern commercial truck electrical systems generate significant EMI, and field work exposes tools to fuel, fluids, and drops. The IP65 rating and 2-meter drop certification mean this meter takes the abuse and keeps working.

Safety Ratings

• CAT III 1000V — rated for industrial electrical measurements up to 1,000V in Category III environments (distribution boards, fixed installations)
• CAT IV 600V — rated for measurements at the source of low-voltage installations, the highest category for general-purpose meters

These ratings matter when probing truck chassis electrical systems, high-voltage hybrid or electric vehicle circuits, and industrial equipment panels. Consumer meters carry only CAT II ratings, which are inadequate for professional truck and equipment work.

Why a Diesel Tech Needs This Meter

A scanner tells you what the ECU sees. A multimeter tells you what is actually happening at the circuit level. When a truck throws a CAN fault, a sensor code, or an aftertreatment fault, the next step is verifying voltage at the sensor connector, checking ground paths, confirming signal integrity, and testing harness continuity. The JT2003 handles all of that with True RMS accuracy — critical for the PWM signals and non-sinusoidal waveforms common in modern truck electrical systems.

Key Specifications

• Part number: 50002003
• MSRP: $245.00
• Display: 3 5/6 digit True RMS with large multi-display screen
• Ranging: Auto-ranging
• Protection: IP65 (dust-tight, water-jet resistant)
• Drop proof: 2 meters
• Safety: CAT III 1000V / CAT IV 600V
• Measures: AC/DC voltage, AC/DC current, resistance, diode, continuity, capacitance, frequency, duty cycle, temperature (C/F), motor phase voltage

Who Needs This

• Diesel technicians diagnosing commercial truck electrical systems
• Off-highway and construction equipment technicians
• Agricultural equipment shops doing sensor and harness diagnostics
• Any tech who needs a meter that survives daily shop use and handles the full measurement range needed on modern heavy equipment

Why Buy From OEM Diagnostic Tools?

We have been a Jaltest tools specialist since 2016 and carry the full Jaltest Tools product line alongside diagnostic systems. Free shipping on every order, full warranty, and real tech support at 866-217-0063 if you have questions about this meter or how it fits into your diagnostic workflow.

Call 866-217-0063 for quick answers and help!