Fluke 289 service manual

AC and DC Display Temperature Measurement Resistance Measurement Continuity Indicator Continuity Testing Conductance Measurement Capacitance Measurement Diode Testing Current Measurement Setup Current Measurement Circuit Connection Functions Allowing Frequency Measurement Frequency Display Duty Cycle Measurements Duty Cycle Display Pulse Width Measurements Testing the Current Fuses Replacing Batteries and Fuses Replaceable Parts The descriptions and instructions in this manual apply to the model and model True-rms Digital Multimeters hereafter referred to as the Meter.

The model appears in all illustrations. In this manual, a Warning identifies hazardous conditions and actions that could cause bodily harm or death. A Caution identifies conditions and actions that could damage the Meter, the equipment under test, or cause permanent loss of data.

Before you use the Meter, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. Check the test leads for continuity. Replace damaged test leads before you use the Meter. These voltages pose a shock hazard. Remember to place the Meter in series with the circuit. Protection may be impaired. When in doubt, have the Meter serviced. Voltages greater than what is indicated may be present.

First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then select the filter function. To avoid possible damage to the Meter or to the equipment under test, follow these guidelines:.

Model only. Do not dispose of this product as unsorted municipal waste. The 14 push buttons on the front of the Meter activate features that augment the function selected using the rotary switch, navigate menus or control power to Meter circuits. The buttons shown in Figure 1 are described in Table 2. Cursor buttons select an item in a menu, adjust display contrast, scroll through information, and perform data entry. Freezes the present reading in the display and allows the display to be saved.

Also accesses AutoHold. Switches the Meter range mode to manual and then cycles through all ranges. To return to autoranging, press the button for 1 second. Displays information about the present function or items on the display at the moment the info button is pressed. For some menu selections, holding down a softkey or cursor button will continuously change or advance a selection until the button is released.

Normally, each press of a button causes the selection to change once. During some selections, the selections will change faster if the button is held for two or more seconds. This is helpful when scrolling through a list of selections, such as a list of stored measurements.

The analog bar graph functions like the needle on an analog meter, but without the overshoot. The bar graph updates 30 times per second. Because the graph updates faster than the digital display, it is useful for making peak and null adjustments and observing rapidly changing inputs. For frequency, duty cycle, pulse width, dBm, and crest factor functions, the bar graph represents the amplitude of the input signal volts or amps and not the value in the primary display.

For dc voltage, dc current, and all relative percent modes, a zero-centered bar graph is displayed. For dc voltage and current, the bar graph range is the maximum of the selected range. The number of lit segments indicates the measured value and is relative to the full-scale value of the selected range.

In the 50 Vac range, for example, the major divisions on the scale represent 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 Vac. An input of 25 Vac turns on segments up to the middle of the scale. For off-scale values, f appears to the right of the normal bar graph.

For the zero-center bar graph, a e appears at the left end of the bar graph for negative off-scale values and f appears on the right end for positive off-scale values.

The mini-measurement display shows the measurement value of the primary function, if it is not already shown in the page area of the display. For example, when the display is frozen for a HOLD, the mini-measurement display continues to show the input signal Live measurement and a mini z. In addition, the minimeasurement display will flash, if z for inputs above 30 volts would normally appear in the primary display but is obscured.

To warn of the possibility of blowing a current fuse, the minimeasurement display also flashes when current measurements exceed the maximum continuous current levels see specifications. The page area of the display is where the main meter content is displayed. The primary display upper half of the page area is where the most important value of the selected function is shown. The secondary display contains the bar graph and values that may be measured in addition to the primary function value.

For example, with frequency measurement selected in Vac, the frequency value will appear in the primary display with the ac voltage value in the secondary display. Labels for the four function softkeys F1 through F4 appear in the bottom row of the display.

When not selecting items on a menu or inputting data, pressing 7 increases display contrast and pressing 8 decreases it. Select a primary measurement function by positioning the rotary switch to one of the icons around its perimeter. For each function, the Meter presents a standard display for that function range, measurement units, and modifiers.

Button choices made in one function do not carry over into another function. The model offers two additional functions: low ohms Y and low impedance LoZ ac volts. Each position shown in Figure 3 is described in Table 4. All functions except current use the W and COM input terminals. Input for 0 A to Input for voltage, continuity, resistance, diode test, conductance, capacitance, frequency, temperature, period, and dutycycle measurements.

The Meter is powered by six AA batteries and controlled through a front panel power switch and internal circuits designed to help conserve battery power.

The following sections describe several techniques for controlling Meter power. With the Meter off, press O to turn on the Meter. Pressing O while the Meter is on causes it to turn off. When the Meter is next turned on, the dispay shows the collected data in stopped mode.

Pressing the softkey labeled Save will save the data. The battery level indicator in the upper left-hand corner of the display indicates the relative condition of the batteries. Table 6 describes the various battery levels the indicator represents. The Meter automatically turns off if the rotary switch is not moved or a button is not pressed for 15 minutes default.

Pressing O will turn the Meter back on after it is powered off automatically. If Auto off is enabled set to a time period , and MIN MAX record, Peak record, Recording, or AutoHold is enabled, the Meter will enter a battery-saver mode if a push-button is not pressed or the rotary switch is not moved for a set period of time.

For the. Battery saver mode conserves battery power by shutting down circuits not necessary for the selected function, including the display. However, the LED surrounding the power button O will continue to flash to indicate the Meter is still collecting data. Pressing R switches the Meter between manual and autoranging. It also cycles through the Meter ranges when manual ranging is enabled. These functions all use a fixed range.

In autorange, the Meter selects the lowest range to display the highest available precision resolution for the input signal. If Manual range is already enabled, press and hold R for one second to enter the autoranging mode.

If autorange is enabled, press R to enter manual ranging. Each additional press of R sets the Meter to the next higher range, unless it is already in the highest range, at which point the range switches to the lowest range. If viewing the display becomes difficult in low-light conditions, press G to activate the LCD backlight.

The backlight button cycles the backlight through three states: low, high, and off. The Meter displays a message if the battery level will not support the backlight operation. To conserve battery life, a user-adjustable timeout controls how long the backlight stays on.

The default timeout is 5 minutes. Each primary measurement function rotary switch position has a number of optional sub-functions or modes accessed by pressing the softkey labeled Menu F1.

A typical menu is shown in Figure 5. Menu selection is indicated by the filled-in black square hereafter the menu selector to the left of a menu item. Use the four front-panel cursor buttons to position the menu selector next to a menu item.

The function selected when the menu opens is the function selected the last time the menu was used. To get to the Hz menu item from the REL item, press 6 once, followed by one press of 7.

Once the desired function or mode appears in one of the softkey labels, press the appropriate softkey to activate it. The pop-up menu closes and the display changes to reflect the selection just made. Pressing the softkey labeled Close closes the pop-up menu, leaving the Meter in the state it was in before pressing the Menu softkey. In most cases, the softkeys revealed by the menu selection act like toggles.

In this example, the Meter is not in the relative mode, so pressing the softkey labeled REL would activate, or toggle, the relative mode. The meter needs 6 AA. Enter a product name or number to find an up-to-date Fluke product manual. Skip to main content. Other Fluke companies Talk to a Fluke sales expert.

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