Finest 705 Series - User Manual

The Finest Model 705 & 707 Series True RMS Multimeters are advanced test and measurement devices designed for a wide range of electrical measurements. These multimeters are manufactured by Fine Instruments Corporation, a company based in Bucheon-shi, Kyunggi-do, Korea, specializing in test and measurement equipment.

Function Description

The multimeters offer comprehensive measurement capabilities, including:

DC Voltage: Measures from 0 to 1000 V.
AC Voltage (True RMS): Measures from 15 mV to 1000 V with a 50 kHz bandwidth.
DC Current: Measures from 0 to 10 A (with a 20A capability for 30 seconds).
AC Current (True RMS): Measures from 25 µA to 10 A (with a 20A capability for 30 seconds).
Resistance: Measures from 0 to 50 MΩ.
Conductance: Measures from 0 to 20 nS.
Capacitance: Measures from 0.001 nF to 5 mF.
Frequency: Measures from 0.5 Hz to 5 MHz.
Duty Cycle: Measures from 0.1% to 99.9% for 0.5 Hz to 300 kHz (pulse width > 3 µsec.).
Diode Test: Provides a 3.0 V test voltage.
Temperature: Measures from -50 °C to 1300 °C (-58 °F to 2372 °F).
Continuity Check: Beeps at approximately < 10 Ω with a response time of < 1ms.
dBm and dB: Measures decibels relative to 1 milliwatt (dBm) and decibels relative to a user-defined voltage (dB).
1ms PEAK Hold: Captures transient voltage or current signal events as short as 1ms.

Important Technical Specifications

Basic Accuracy:
- DC voltage: 0.05% (Model 707), 0.1% (Model 705).
- AC voltage: 0.3% (Model 707), 0.5% (Model 705).
Display (LCD):
- Model 707: 4-4/5 digit, 50000 counts (primary display) / 5000 counts (secondary display).
- Model 705: 3-4/5 digit, 5000 counts (primary display) / 5000 counts (secondary display).
- Analog bar graph: 25 segments, updates 40 times/sec.
Safety & Compliances:
- Maximum voltage between any terminal and earth ground: 1000 V ac/dc.
- Complies with IEC 1010-1 (1995), UL 3111-1 (6. 1994), EN 61010-1 (1995), CSA C22.2 No. 1010.1-92; Overvoltage 1000V Category III.
- Surge Protection: 8 kV peak per IEC 1010.1-92.
- Fuse Protection: 1000 V / 440 mA IR 10 kA Fast fuse for mA or µA inputs; 1000 V / 11 A IR 10 kA Fast fuse for A input.
Input Impedance: 10 MΩ, 30 pF nominal (50 MΩ, 100 pF nominal for 50 mV & 500 mV ranges).
CMRR (Common Mode Rejection Ratio): > 60dB at DC to 60 Hz in AC volts, > 120 dB at DC, 50Hz and 60Hz in DC volts.
NMRR (Normal Mode Rejection Ratio): > 60dB at 50Hz/60Hz.
Battery: Single 9V battery (NEDA 1604, JIS 006P or IEC 6F 22).
Battery Life: 150 hrs. typical (with backlight off).
Dimensions (H x W x D): 208 x 103 x 54 mm (not including mounted accessory).
Weight: Approx. 655g.
Operating Temperature: 0 °C to 50 °C.
Storage Temperature: -20 °C to 60 °C.
Relative Humidity: 0 % to 80 % @ (0 °C to 35 °C), 0 % to 70 % @ (35 °C to 50 °C).
Altitude: Operating – up to 2000m, Storage – 10000m.

Usage Features

True RMS Measurement: Accurately responds to effective RMS values regardless of waveform shapes, including non-sinusoidal signals with harmonics.
Rotary Switch and Pushbuttons: Intuitive interface for selecting functions and activating special features.
On-Screen Menu Selection: Allows for alternate functions and modifiers for selected measurements.
Auto/Manual Ranging: Users can manually select ranges or allow the meter to auto-range for convenience.
MIN/MAX/AVG Mode: Records and displays minimum, maximum, and average values over time, with an audible beep for new updates.
RELA (Relative Mode): Sets the meter to relative mode, displaying the difference between the current measurement and a stored or programmed reference value.
HOLD/Auto Hold: Freezes the display for later viewing; Auto Hold automatically freezes stable readings and updates when a new stable value is detected.
Memory Mode (MEM): Stores up to 20 measurement values, allows recall, and clearing of stored data.
Backlight: Illuminates the display for clear readings in poorly lit environments.
Auto Power Off: Extends battery life by automatically entering a power-saving mode after 15 minutes of inactivity and then completely turning off. This feature can be disabled or adjusted via the Setup Menu.
Wrong Input Warning Feature: Alerts the user with a beeper and display messages (LEAd or Fuse) if test leads are incorrectly connected for current measurements, preventing damage to the meter or circuit under test.
RS-232C PC-to-Meter Communications: Equipped with an optically isolated interface for data communication with a PC using the RS 70 optical adapter cable and WS 70 software.
AC+DC Total RMS and AC DC Dual Display: Allows for combined AC+DC RMS measurements or simultaneous display of AC and DC components of a signal.
Positive and Negative Duty Cycle Measurement: Optimized for measuring ON or OFF time of logic and switching signals, with an indicator for negative duty cycle.

Maintenance Features

Cleaning and Storage: Case can be wiped with a damp cloth and mild detergent. Input terminals should be cleaned with alcohol. For long-term storage (over 60 days), the battery should be removed.
Auto Fuse Detection: The meter automatically verifies the integrity of its internal fuses when a test lead is plugged into current terminals, displaying "FUSE" if an open fuse is detected.
Battery and Fuse Replacement: Uses a standard 9V battery and specified fast-acting fuses (1000V/440mA IR 10kA for mA/µA, and 1000V/11A IR 10kA for A). Instructions are provided for safe replacement.
Troubleshooting: Guidance is provided for checking the meter's operation after battery or fuse replacements. In cases of high voltage transients damaging internal components (series fusible resistors, spark gaps), replacement by qualified personnel is required, with warranty information for repair services.
Calibration Interval: 1 year.
Warranty: 3 years for defects in material and workmanship under normal use and service. The warranty excludes fuses, batteries, misuse, alteration, neglect, or accidental damage.

Finest 705 Series Specifications

General

Brand	Finest
Model	705 Series
Category	Multimeter
Language	English

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Finest 705 Series - User Manual

Table of Contents

Summary

Basic Specifications

DC Voltage

AC Voltage, true RMS

Basic Accuracy

DC Current

AC Current, true RMS

Resistance

Conductance

Capacitance

Frequency

Duty Cycle

Diode Test

Temperature

Memory Location

Continuity Check

1. SAFETY INFORMATION

Safety Precautions

International Electrical Symbols

2. ELECTROMAGNETIC COMPATIBILITY (EMC)

3. CONTROLS AND INDICATORS

Controls and Indicators Overview

4. ROTARY SWITCH AND PUSHBUTTON OVERVIEW

Turning the Meter On

Rotary Switch Operation

Analog Bar-graph

Pushbutton Functions

RANGE Button

MIN;MAX Mode

1 ms PEAK Mode

RELA Mode

Additional Pushbutton Operations

HOLD and Auto Hold

MEM and Memory Operations

Backlight Button

On Screen Menu Selection Keys

Setup Mode

Customizing Default Settings

Menu Selection Key Usage

RS-232 C PC-to-Meter Communications

5. METER OPERATION AND SPECIAL FEATURES

Making Measurements

Voltage Measurements Overview

Specific Voltage Measurement Functions

AC Voltage Measurements

dB (dBm or dB V) Measurements

DC Voltage Measurements

AC + DC Voltage Measurements

AC DC Dual Display Mode

Frequency and Pulse Width Measurements

Frequency Measurements

Duty Cycle Measurements

Pulse Width Measurement

Resistance, Continuity, and Capacitance

Resistance Measurements

Continuity Test

Conductance for High Resistance Tests

Capacitance and Diode Testing

Capacitance Measurement

Diode Test

Temperature and Current Measurements

Temperature Measurements

Current Measurements

Current Measurement Details

True RMS AC Amps

DC Amps

AC + DC total RMS Current

AC DC Dual Display Current

Meter Features and Operation

Wrong Input Warning Feature

Auto; Manual Range Operation

Beeper Operation

Auto - Power - Off

6. MAINTENANCE

Cleaning and Storage

Auto Fuse Detection

Battery and Fuse Replacement

Trouble Shooting