® Models 110, 111 & 112 True RMS Multimeters Users Manual November 2000 (English), Rev.2, 3/04 © 2000-2004 Fluke Corporation. All rights reserved.
Limited Warranty and Limitation of Liability Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.
Table of Contents Title Page Read Before Using the Meter: Warnings and Precautions .................................................... Contacting Fluke ................................................................................................................... "Warning" and "Caution" Statements..................................................................................... Unsafe Voltage...........................................................................................................
Models 110, 111 & 112 Users Manual W Read Before Using the Meter: Warnings and Precautions To avoid possible electric shock or personal injury, follow these guidelines: • Use the Meter only as specified in this manual or the protection provided by the Meter might be impaired. • Do not use the Meter or test leads if they appear damaged, or if the Meter is not operating properly. • Always use proper terminals, switch position, and range for measurements.
Models 110, 111 & 112 True RMS Multimeters The Fluke Model 110, Model 111, and Model 112 are batterypowered, true-RMS multimeters (hereafter "the Meter") with a 6000-count display and a bar graph. This manual applies to all three models. All figures show the Model 112. The Meter measures or tests the following: • AC / DC voltage and current • Resistance • Continuity • Diodes • Voltage and current frequency • Capacitance These meters meet CAT III IEC 61010-1-95 standards.
Models 110, 111 & 112 Users Manual Battery Saver ("Sleep Mode") Rotary Switch Positions The Meter automatically enters "Sleep mode" and blanks the display if there is no function change or button press for 20 minutes. To disable the Sleep mode, hold down the Hz button while turning the Meter on. The Sleep mode is always disabled in the MIN MAX AVG mode. Terminals A 1 COM V 3 10 A FUSED Switch Position AC voltage from 300 mV to 600 V. Frequency from 5 Hz to 50 kHz.
True RMS Multimeters Display Display No. 6 5 4 3 7 2 7 8 nµF mVA Mke kHz 8 DC AC 13 12 14 11 10 15 Symbol s R O 4 Y 5 K 6 M X W V Meaning Meter is set to continuity function. Diode test. Negative readings. Unsafe voltage. Voltage ≥ 30 V, or voltage overload condition (OL). Display HOLD is enabled. Display freezes present reading. In MIN MAX AVG mode, MIN MAX AVG recording is paused. MIN MAX AVG mode enabled. Maximum, minimum, or average reading displayed.
Models 110, 111 & 112 Users Manual MIN MAX AVG Recording Mode Display HOLD The MIN MAX AVG recording mode captures the minimum and maximum input values, and calculates a running average of all readings. When a new high or low is detected, the Meter beeps. Put the Meter in the desired measurement function and range. ⇒ Press MIN MAX to enter MIN MAX AVG mode. m and MAX are displayed and the highest reading detected since entering MIN MAX AVG is displayed.
True RMS Multimeters Manual Ranging and Auto Ranging Manual Ranging and Auto Ranging Power-Up Options The Meter has both Manual Range and Auto Range modes. ⇒ In the Auto Range mode, the Meter selects the range with the best resolution. ⇒ In the Manual Range mode, you override Auto Range and select the range yourself. When you turn the Meter on, it defaults to Auto Range and Auto Range is displayed. 1. To enter the Manual Range mode, press RANGE. Manual Range is displayed. 2.
Models 110, 111 & 112 Users Manual Making Basic Measurements Measuring AC and DC Voltage The figures on the following pages show how to make basic measurements. When connecting the test leads to the circuit or device, connect the common (COM) test lead before connecting the live lead; when removing the test leads, remove the live lead before removing the common test lead.
True RMS Multimeters Making Basic Measurements Note The 3.00 A AC minimum specified reading is calculated by the Meter as 5% of 60 A. However for safety and compactness, the current shunt in the Meter is specified for 10 A continuous, 20 A overload for up to 30 seconds. Exceeding these levels will open the user-replaceable internal fuse. The 10 A AC current in the 111 and 112 is designed for accurate, in-line measurement of loads on line-powered devices and circuits.
Models 110, 111 & 112 Users Manual Testing for Continuity Testing Diodes Good Diode Good Diode Single Beep aej06f.eps Forward Bias Note Bad Diode Reverse Bias Bad Diode The continuity function works best as a fast, convenient method to check for opens and shorts. For maximum accuracy in making resistance measurements, use the Meter’s resistance (e) function. Open and Shorted aej07f.
True RMS Multimeters Making Basic Measurements Measuring AC or DC Current (Models 111 and 112) Measuring Frequency WWarning To avoid personal injury or damage to the Meter: • Never attempt to make an in-circuit current measurement when the open-circuit potential to earth is > 600 V. • Check the Meter's fuse before testing. (See “Testing the Fuse”) • Use the proper terminals, switch position, and range for your measurement.
Models 110, 111 & 112 Users Manual Using the Bar Graph The bar graph is like the needle on an analog meter. It has an overload indicator (>) to the right and a polarity indicator (±) to the left. Because the bar graph updates about 40 times per second, which is ten times faster than the digital display, the bar graph is useful for making peak and null adjustments. The bar graph is disabled when measuring capacitance.
True RMS Multimeters Testing the Fuse (Models 111 and 112) Testing the Fuse (Models 111 and 112) WWarning To avoid electrical shock or injury, remove the test leads and any input signals before replacing the fuse. Test fuse as shown below. <.5 Ω OK To remove the battery door: 1. Remove screw from battery door. 2. Use the finger recess to lift door slightly. 3. Pull door toward bottom of Meter to release the latch. 4. Lift the door straight up to separate from case.
Models 110, 111 & 112 Users Manual Specifications Accuracy is specified for 1 year after calibration, at operating temperatures of 18 °C to 28 °C, with relative humidity at 0 % to 95 %.
True RMS Multimeters Specifications Function AC Volts1,2,3 -- True RMS (50 Hz to 500 Hz) Range Accuracy ± ( [ % of Reading ] + [ Counts ] ) Model 110 Model 111 Model 112 Resolution 6000 mV4 6.000 V 60.00 V 600.0 V 6000 mV4 6.000 V 60.00 V 600.0 V 1 mV 0.001 V 0.01 V 0.1 V 1 mV 0.001 V 0.01 V 0.1 V Continuity 600 Ω 1Ω Beeper guaranteed on < 20 Ω, guaranteed off > 250 Ω; detects opens or shorts of 250 µs or longer. Ohms 600.0 Ω 6.000 kΩ 60.00 kΩ 600.0 kΩ 6.000 MΩ 40.00 MΩ 0.1 Ω 0.001 kΩ 0.
Models 110, 111 & 112 Users Manual Function Range DC Amps8 (Models 111 and 112) 6.000 A 10.00 A continuous or 20 A overload for 30 seconds maximum 0.001 A 0.01 A Hz7 (V or A input ) 99.99 Hz 999.9 Hz 9.999 kHz 50.00 kHz 0.01 Hz 0.1 Hz 0.001 kHz 0.01 kHz MIN MAX AVG Accuracy and Response Time 1. 2. 3. 4. 5. 6. 7. 8. Accuracy ± ( [ % of Reading ] + [ Counts ] ) Model 110 Model 111 Model 112 Resolution NA 1.0 % + 3 1.0 % + 3 0.1 % + 2 0.1 % + 2 0.
