ESI 590 Pro Automotive Digital Multimeter Instruction Manual

1. Introduction

The ESI 590 Pro Automotive Digital Multimeter (DMM) is a versatile tool designed for automotive diagnostic applications. It offers a wide range of testing capabilities, including specialized functions for automotive systems such as Ms Pulse Width for fuel injector on-time and RPM measurements. This DMM features auto-ranging for ease of use and a large, backlit LCD display for clear readings in various lighting conditions.

This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your ESI 590 Pro DMM. Please read it thoroughly before using the device.

2. Safety Information

WARNING: To avoid electric shock or personal injury, and to prevent damage to the meter or the equipment under test, adhere to the following safety guidelines:

• Always ensure the test leads are in good condition, free from cracks or damaged insulation.
• Do not apply more than the rated voltage, as marked on the meter, between the terminals or between any terminal and earth ground.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Before measuring current, ensure the meter's fuses are intact and correctly rated.
• Disconnect the circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance.
• Do not operate the meter with the case open or if the battery cover is not securely closed.
• Replace the battery as soon as the low battery indicator appears to ensure accurate readings.
• Always use the correct function and range for measurements.

3. Product Overview

3.1 Components

The ESI 590 Pro DMM features a robust design with a large digital display, a central rotary function switch, and multiple input jacks for various measurements.

Image 1: Front view of the ESI 590 Pro Automotive Digital Multimeter. The device features a prominent digital LCD screen at the top, a central rotary switch for selecting measurement functions, and three input jacks at the bottom for test leads. Buttons for various functions like DC/AC, Hz/%, REL, and HOLD are located above the rotary switch. The meter is housed in a red protective casing.

3.2 Included Accessories

Your ESI 590 Pro DMM package includes:

• Two sets of test leads
• RPM pick-up (inductive)
• Temperature probe
• 9-volt battery
• Carrying case

4. Setup

4.1 Battery Installation

1. Ensure the meter is turned OFF.
2. Locate the battery compartment on the back of the meter.
3. Remove the screw(s) securing the battery cover and lift the cover off.
4. Connect a new 9-volt battery to the battery clips, observing correct polarity.
5. Place the battery into the compartment and replace the cover, securing it with the screw(s).

4.2 Connecting Test Leads

• For most voltage, resistance, and temperature measurements, insert the black test lead into the COM (common) jack and the red test lead into the VΩHz jack.
• For current measurements up to 400mA, insert the red test lead into the mA jack.
• For high current measurements up to 20A, insert the red test lead into the 20A jack.
• Ensure all connections are firm and secure.

5. Operating Instructions

5.1 General Operation

• Power On/Off: Rotate the function switch from OFF to any desired measurement function to turn the meter on. Rotate back to OFF to power off. The meter also features an Auto Power Off function to conserve battery life.
• Auto-Ranging: The ESI 590 Pro is an auto-ranging DMM, meaning it automatically selects the appropriate measurement range. This simplifies operation, but some measurements may take a moment to stabilize.
• Backlight: Press the backlight button (often integrated with the HOLD button or a separate button) to illuminate the display for better visibility in low-light conditions.
• Data Hold: Press the HOLD button to freeze the current reading on the display. Press it again to release.
• Relative Change Function (REL): Press the REL button to store the current reading as a reference value. Subsequent readings will be displayed as the difference from this reference. Press again to exit relative mode.

5.2 Measurement Functions

Select the desired function by rotating the central switch.

• Voltage (V DC/AC): Connect leads as described in Section 4.2. Select the V DC or V AC position on the rotary switch. The meter will auto-range.
• Current (A DC/AC, mA DC/AC): Connect leads to the appropriate current jacks (mA or 20A) and select the corresponding current function on the rotary switch. Ensure the meter is connected in series with the circuit.
• Resistance (Ω): Connect leads to COM and VΩHz. Select the Ω function. Ensure the circuit is de-energized before measuring resistance.
• Capacitance (CAP): Connect leads to COM and VΩHz. Select the CAP function. Discharge capacitors before testing.
• Frequency (Hz) / Duty Cycle (%): Connect leads to COM and VΩHz. Select the Hz/% function.
• Temperature (°C/°F): Connect the temperature probe to the appropriate jacks (usually COM and VΩHz, or dedicated temperature jacks if present). Select the °C or °F function.
• RPM (Revolutions Per Minute): Use the inductive RPM pick-up. Connect it to the designated RPM input. Select the RPM function. The inductive pick-up features a five-position adjustable sensitivity switch for optimal signal detection.
• Ms Pulse Width: This function is specifically designed to measure the on-time of fuel injectors. Connect the meter according to the specific instructions for pulse width measurement (refer to advanced automotive diagnostics guides if needed). Select the Ms-PULSE function.
• Dwell: Select the DWELL function to measure the dwell angle in ignition systems.

6. Maintenance

6.1 Cleaning

Wipe the meter's case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Keep the display clean and free from scratches.

6.2 Battery Replacement

When the low battery indicator appears on the display, replace the 9-volt battery as described in Section 4.1. Prompt battery replacement ensures continued accuracy and proper operation.

6.3 Fuse Replacement

The ESI 590 Pro DMM is protected by internal fuses for current measurement ranges. If the meter fails to read current, the fuse may be blown. Refer to the meter's internal markings for fuse specifications (e.g., 20A fused, 400mA fused) and replace with fuses of identical type and rating. Fuse replacement typically involves opening the meter's back casing, similar to battery replacement, but may require additional steps. Consult a qualified technician if unsure.

6.4 Storage

When not in use for extended periods, store the meter in its carrying case in a cool, dry environment. Remove the battery if storing for several months to prevent leakage.

7. Troubleshooting

• Meter does not power on: Check battery installation and ensure the battery has sufficient charge. Replace if necessary.
• Inaccurate or unstable readings:
  • Ensure test leads are properly connected and making good contact.
  • Verify the correct function and range are selected.
  • Check for external electrical interference.
  • Allow the auto-ranging function sufficient time to stabilize, especially for initial readings.
• Display shows 'OL' (Overload): This indicates the measured value exceeds the selected range. For auto-ranging meters, it means the value is beyond the meter's maximum capability for that function. Ensure the meter is connected correctly and the value is within the meter's specifications.
• No current reading: Check the fuses as described in Section 6.3. Ensure the test leads are connected to the correct current input jacks (mA or 20A) and the meter is in series with the circuit.
• Tachometer not working correctly: Ensure the inductive RPM pick-up is properly connected and positioned. Adjust the five-position sensitivity switch on the pick-up to optimize signal detection. Verify the engine is running and producing a consistent signal.

8. Specifications

9. Warranty and Support

For warranty information and technical support regarding your ESI 590 Pro Automotive Digital Multimeter, please refer to the documentation included with your purchase or contact ELECTRONIC SPECIALTIES directly. Contact details can typically be found on the manufacturer's official website or on the product packaging.