Instruction/ maintenance manual of the product Extech 380976 HP
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User Guide 1 Φ /3 Φ 1000 Amp True RMS Power Clamp-On Model 380976.
380976 V3.2 4/11 2 Introduction Congratulations on your purchase of the Ext ech 380976 Power Cla mp-On Meter. This device measures 1 Φ /3 Φ Power (True, Ap parent, and Reactive), Horsepo wer, Phase Angle, True RMS Current/Voltage, Resistance, Capacitance, Freque ncy, & Temperature.
380976 V3.2 4/11 3 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for on e year from date of shipment (a six month limited warranty applies to sensors and cables).
380976 V3.2 4/11 4 Meter Description 1. Transformer Jaws 2. Jaw opening trigger 3. Data Hold & MX/MN button 4. Function Selector 5. Range button 6.
380976 V3.2 4/11 5 Measurements AC + DC Voltage Measure ments WA R NI NG The maximum input is 600V. Do no attempt vo ltage measurements above this limit. Exceeding this limit could cause electrical sh ock and damage to the meter. 1. Set the rotary switch to the ‘ V’ position.
380976 V3.2 4/11 6 AC Power Measurements 1 Φ KW, KVA, KV A R, Pow er Factor & Phase Angle Measurement 1. Set the rotary switch to the ‘KW/KVA’ position. 2. Insert the test leads to the meter as follows: Black to ‘COM’ and Red to ‘V’. 3.
380976 V3.2 4/11 7 3 Φ 3-Wire KW, HP, KVA, KVAR, Pow er Factor & Phase Angle Measurement 1. First, measure W RS(L1 L2) (refer to the diagram be low). a. Set the rotary switch to the “ V ”. b. Press and hold the “ HOLD ” key while setting the rotary switch to “KW/KVA”, the 3 φ 3W and W L12 symbols will appear.
380976 V3.2 4/11 8 3. The power clamp will process these tw o sets of data (W L12 , W L23 ), and show the result on the LCD. The W L123 symbol will be shown to indicate 3 φ 3W power.
380976 V3.2 4/11 9 NOTE Once a phase is selected as COM, user s can not change this selection in the subsequent measurement. For example, if S (or L2) phase is selected, S (or L2) phase is always connected to t he COM during measurement of W RS (or W L1L2 ) and W TS (or W L3L2 ) in 3 φ 3W unbalanced power.
380976 V3.2 4/11 10 3 Φ 4-Wire KW, HP, KVA, KVAR, Pow er Factor & Phase Angle Measurement 1. First, measure W R(L1) (refer to t he diagram below).
380976 V3.2 4/11 11 3. Third, measure W T(L3) (refer t o the diagram that follows the steps below) a. Disconnect the test probe from the phase wher e th e jaws were clamped in the previous measurement. b. Connect the test probe of the V (red) terminal to th e third phase (e.
380976 V3.2 4/11 12 4. The power clamp will proce ss these t hree sets of data ( W L1, W L2 W L3 ) and s how the r esult o n the L CD. The WL 123 symbol will be s hown to indic ate the 3 φ 4W power (r efer to di agram) . The 3 φ 4W power value in w atts is now stored in the meter’s memory.
380976 V3.2 4/11 13 KW+KVA R, KVA+ θ ( Phase A ngle) or A+V di splays. 6. W 3 φ 4W = W R(L1) + W S(L2) W T(L3) KVA K W KVAR WW W 34 2 34 2 34 φφ φ =+ PF K W KVA W W W 34 34 34 φ φ φ = 7. Set the rotary switch to another position to exit this mode and clear the stored data.
380976 V3.2 4/11 14 Capacitance Me asurements 1. Fully discharge the capacitor under test before pro ceeding. 2. Insert the test leads into the input jacks. (Black to ‘COM’ and Red to ‘ ’). 3. Set the rotary switch to the ‘ ’ position. 4. Connect the red and black test leads to the capacitor.
380976 V3.2 4/11 15 Meter Control Keys HOLD - MX/MN Ke y Data Hold Function Press this key momentarily to put the meter into Data Hold mode ( HOLD will appear on the LCD). In this mode, the meter freezes the displayed reading. To e xit the Data Hold mode, press the key again (the HOLD icon will sw itch off).
380976 V3.2 4/11 16 Automatic Sleep Mode and Battery Replacement The Meter is powered by a 9V batt ery. An AUTO SLEEP feature is included to preserve battery life. Note: The Auto Power OFF feature is disabled when the meter is in the MIN/MAX m ode Note: In the sleep mode the met er continues to draw a small amount of battery curr ent.
380976 V3.2 4/11 17 Specifications General Specifi cations Display Dual Display; 4-digit, 10,000 count (0 to 9999) LC D Jaw Opening 1.6” (42mm) Max. Input limit Max. voltage between any terminal and ground : 600Vrms Sampling rate 2.5 times per second (Digital Disp lay); Once every 6 seconds (KW, KVA, and KVAR) Auto Sleep After approx.
380976 V3.2 4/11 18 Measurement Specific ations Accuracy: ± ( % of rdg + number of digits) from 18 o C to 28 o C (64 o F t o 82 o F) R.H. < 80% AC Current (50 Hz to 400Hz) Tr ue RMS Range Resolution Accuracy (% reading) Sensitivity Overload Protection 99.
380976 V3.2 4/11 19 M Ω (Resistance) Range Resolution Accuracy Overload Protection 9.999M Ω 1K Ω 99.99M Ω 10K Ω ±(5% + 10 d) 600V Capacitance Range Resolution Accuracy Overload Protection 10.000 μ F 1nF 100.00 μ F 10nF 1000.0 μ F 100nF ±(1.5% + 5 d) 7000 μ F 1 μ F ±(4.
380976 V3.2 4/11 20 Support line (781) 890-7440 Technical support: Ex tension 200; E-mail: supp ort@extech.com Repair & Returns: Ex tension 21 0; E-mail: repair@extech.
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If you already are a holder of HP Extech 380976, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime HP Extech 380976.
However, one of the most important roles played by the user manual is to help in solving problems with HP Extech 380976. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device HP Extech 380976 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
