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PN 3270465

February 2008, Rev. 1, 6/10

All product names are trademarks of their respective companies.

189II/AN

True-rms Digital Multimeter

Service Manual

Reproduction and distribution of this technical manual is
authorized for Government Purposes.

Содержание 189II/AN

Страница 1: ...rved Printed in USA Specifications are subject to change without notice All product names are trademarks of their respective companies 189II AN True rms Digital Multimeter Service Manual Reproduction...

Страница 2: ...e center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no ris...

Страница 3: ...ns 7 Capacitance and Diode Test Specifications 8 Frequency Counter Specifications 8 Frequency Counter Sensitivity 8 MIN MAX Recording and Peak Specifications 9 Input Characteristics 9 Burden Voltage A...

Страница 4: ...17 Keypad Test 17 LCD Test 17 IR Port Verification 18 Temperature Accuracy Test 18 Accuracy Tests for Volts Current E and G Test Functions 19 Calibration Adjustment 22 Operation 23 Entering the Passwo...

Страница 5: ...re Test Input and Display 19 4 189II AN Performance Test Steps 19 5 Calibration Entry Soft Keys 23 6 Softkey Functions during Calibration 25 7 Calibration Adjustment Steps for Firmware Version 1 00 26...

Страница 6: ...189II AN Service Manual iv...

Страница 7: ...Title Page 1 Fluke 189II AN Block Diagram 12 2 Testing the Current Fuses 15 3 Battery and Fuse Replacement 16 4 PCA Component Location 24 5 Calibration Adjustment Screenshot 24 6 Replacements Parts 32...

Страница 8: ...189II AN Service Manual vi...

Страница 9: ...s Digital Multimeter hereafter referred to as the Meter Information provided includes Precautions and safety information Specifications Basic maintenance cleaning replacing the battery and fuses Perfo...

Страница 10: ...urrent or Voltage I Fuse F DC Direct Current or Voltage T Double Insulated X Hazardous voltage W Important Information refer to manual Battery Low battery when shown on the display J Earth ground R Co...

Страница 11: ...might be impaired Do not use the Meter if it is damaged Before you use the Meter inspect the case Look for cracks or missing plastic Pay particular attention to the insulation surrounding the connect...

Страница 12: ...s keep fingers behind the finger guards on the probes Only use test leads that have the same voltage category and amperage ratings as the meter and that have been approved by a safety agency Use prope...

Страница 13: ...EN61326 1 Australian EMC N10140 US FCC FCC CFR47 Part 15 CLASS A Certifications UL CE CSA N10140 Detailed Specifications Accuracy Accuracy is specified for a period of one year after calibration at 1...

Страница 14: ...0 01 A 1 20 0 6 20 0 6 20 5 40 AC A 3 5000 A 0 1 A 1 5 0 6 5 0 6 10 5 40 50 mA 0 001 mA 1 20 0 6 20 0 6 20 5 40 AC mA 3 400 mA 0 01 mA 1 5 0 6 5 1 5 10 5 40 5 A 0 0001 A 1 5 20 0 8 20 3 40 4 Not Spec...

Страница 15: ...ecifications Function Range Resolution Accuracy 500 1 0 01 0 05 10 5 k 1 0 0001 k 0 05 2 50 k 1 0 001 k 0 05 2 500 k 0 01 k 0 05 15 5 M 0 0001 M 0 15 4 30 M 0 001 M 1 5 4 50 M 0 01 M 1 5 4 50 M up to...

Страница 16: ...40 V 300 kHz 1000 V 50 V 300 kHz 5 V 100 V 300 kHz Approximate Current Sensitivity rms sine wave Input Range 15 Hz to 10 kHz AC Bandwidth Approximate DC Trigger Levels DC Bandwidth 500 A 25 A 100 kHz...

Страница 17: ...to the product of a V rms sinewave times frequency of 2 x 107 V Hz 2 For circuits 0 5 A short circuit 660V for high energy circuits Burden Voltage A mA A Function Range Burden Voltage 500 A 102 V A 5...

Страница 18: ...acteristics Recommended Model Calibrator AC Voltage Range 0 1000 Vac Accuracy 0 0875 Frequency Range 20 Hz 100 kHz Accuracy 3 DC Voltage Range 0 1000 Vdc Accuracy 0 0075 Current Range 0 10A Accuracy A...

Страница 19: ...alog Signal Conditioning section is controlled by the measurement processor It gets the range and function from the master control section It in turn sets up all the analog switches starts the ADC rea...

Страница 20: ...2 5 1 8 VSS LCD Measurement uP 12 bit ADC Timers SPI Other Buttons Beeper Backlight Flash and PSRAM Memory LCD Bias On Off Button Rotary Switch Jack Detect fet36 eps Figure 1 Fluke 189II AN Block Diag...

Страница 21: ...r handling them 3 Using the procedures packaging and bench techniques that are recommended The following practices should be followed to minimize damage to S S static sensitive devices 1 MINIMIZE HAND...

Страница 22: ...E EDGES AND NEVER TOUCH OPEN EDGE CONNECTOR EXCEPT AT STATIC FREE WORK STATION PLACING SHORTING STRIPS ON EDGE CONNECTOR HELPS PROTECT INSTALLED S S DEVICES 9 HANDLE S S DEVICES ONLY AT A STATIC FREE...

Страница 23: ...o the case top by six screws Remove the screws with a Phillips head screwdriver 5 Pull the case bottom and cast top apart Removing and Reinserting the Printed Circuit Assembly The circuit board assemb...

Страница 24: ...the case halves W Caution Do not over torque the six Phillips head case screws when attaching the case bottom Use 5 to 7 inch lb of torque 9 Reinstall the six case screws and the battery door 10 Secur...

Страница 25: ...screwdriver to turn the battery door fastener to the unlock position 3 Remove either fuse by gently prying one end loose then lifting the fuse out of the fuse contacts 4 Install only Fluke specified r...

Страница 26: ...t feature Clean the terminals as follows 1 Turn the Meter off and remove all test leads 2 Shake out any dirt that may be in the terminals 3 Soak a clean swab with mild detergent and water Work the swa...

Страница 27: ...ut terminal 3 Turn the rotary switch to all functions except current functions Note that the beeper Chirps continuously and the LCD displays a warning 4 Turn the rotary switch to the A mA position Not...

Страница 28: ...t the following Send line ends with line feed Echo typed characters locally Append line feeds to incoming line ends Wrap lines that exceed terminal width 9 Enter the identification command ID followed...

Страница 29: ...surements in Table 4 are subject to offsets caused by thermals due to temperature gradients between connecting materials After connecting the calibrator to the Meter terminals allow time could be seve...

Страница 30: ...4 9973 5 0027 14 Ohms 50 000 k 50 k 49 973 50 027 Set 5520A for COMP OFF and Remove Auxiliary Test Cable 15 Ohms 500 00 k 500 k 499 73 500 27 16 Ohms 5 0000 M 5 M 4 9921 5 0079 17 Ohms 30 000 M 30 M...

Страница 31: ...to Capacitance function Remove Test Leads from 5520A and REL offset Reconnect Test Leads to 5520A 40 Capacitance 10 00 nF 3 5 nF 4 90 5 10 41 Diode Test 3 1000 V 3 5 k 2 0000 3 1000 42 Diode Test 3 1...

Страница 32: ...residual 4 Test limits are mathematically guard banded to ensure performance at 20 kHz and lower Calibration Adjustment Perform the Calibration Adjustment Procedure when the Meter fails any performanc...

Страница 33: ...ssword attempt the F4 Cancel key is pressed If an incorrect password is entered then Incorrect password entered message is displayed Press OK to return to the Enter Password screen Changing the Passwo...

Страница 34: ...e 5 shows a screen shot of the first step of the calibration adjustment procedure Next 0 03 mVDC Abort Source 0 0000 mV 0 000Hz Calibration Step 1 of 56 CALIBRATING Manual Range 500 mVDC 8 10pm 06 13...

Страница 35: ...e during the calibration procedure Navigation Buttons The UP and DOWN Arrow buttons can be used to adjust display contrast while in the calibration mode The RIGHT and LEFT Arrow buttons are disabled M...

Страница 36: ...iew the calibration adjustment counter go to the Setup Meter Info screen Power Cycle If the Meter power is turned off during calibration the procedure will be aborted and any calibration constants cal...

Страница 37: ...1000 0 V 60 Hz 7 4 18 VDC 0 0 V 0 Hz 3 30 19 VDC 5 0000 V 0 Hz 3 5 20 VDC 5 0 V 60 0 Hz 4 5 21 VDC 5 0 V 20 0 kHz 3 35 22 VDC 50 000 V 0 Hz 3 8 23 VDC 50 0 V 60 0 Hz 5 15 24 VDC 50 0 V 20 0 kHz 7 115...

Страница 38: ...mA 60 Hz 10 4 49 ADC 5 0 A 0 Hz 8 4 50 ADC 10 0 A 0 Hz 3 2 51 AAC 5 0 A 60 Hz 10 4 52 AAC 10 0 A 60 Hz 9 4 1 Meter is Calibrating after Next is pressed 2 For software version 1 00 the instrument disp...

Страница 39: ...0 V 0 Hz 2 1 24 VDC 1000 0 V 0 Hz 3 1 25 VDC 5 0 V 55 Hz 3 12 26 VDC 5 0 V 20 0 kHz 3 13 27 VDC 50 0 V 55 Hz 5 16 28 VDC 50 0 V 20 0 kHz 5 32 29 VDC 1000 0 V 55 Hz 5 7 30 mV DC 500 0 mV 55 Hz 5 8 Conn...

Страница 40: ...C 400 0 mA 55 Hz 2 1 45 ADC 10 0 A 0 Hz 2 1 46 AAC 10 0 A 55 Hz 2 2 Connect the 5520A in a 4 Wire configuration and select COMP 2 Wire To reduce settling time apply 10 ohms to Meter before setting Rot...

Страница 41: ...NTACT POSITIVE BOTTOM CASE 2578353 XBT2 3 BATTERY CONTACT NEGATIVE BOTTOM CASE 2578375 DS1 LCD MODULE 2734828 H15 18 SCREW M3X0 5 6MM PAN PHILLIPS 2743764 H7 14 SCREW 4 14 510 PAN PHILLIPS STEEL 85366...

Страница 42: ...189II AN Service Manual 32 H7 14 8x H1 6 6x MP7 MP2 MP30 MP3 MP6 MP8 MP9 MP4 MP46 H15 18 4x MP12 MP16 MP5 MP1 MP49 MP45 XBT1 XBT2 3 DS1 MP42 44 F2 F1 fet34 eps Figure 6 Replacements Parts...

Страница 43: ...True rms Digital Multimeter Schematic Diagrams 33 Schematic Diagrams The schematic diagrams for the 189II AN are shown in Figure 7...

Страница 44: ...189II AN Service Manual 34...

Страница 45: ...5MM 1000V 5 MMSZ6V2T1 6 2V 10MM 5 15MIL AVSS GND 1 50M VCLAMP 50V 0 01U RMS_IN ACF_IN LPF_OUT 50MIL 50PPM LO_OHM_ISNS 2 00K 20V 1 00K 4 99K 0 1 AGND1 50MIL 1MM 65MIL 65MIL 33MIL GRD3 2MM 2MM 1 50M 1 5...

Страница 46: ...AGND 16V 20 AVSS AVSS EVQPLHA15 RST DVSS DVSS EVQPLHA15 MSP_IRRXD 32 768KHZ 2 00K 10U 10U 10U 20 16V 20 16V 20 10U 0 1U 0 1U 0 1U 0 1U 0 1U 0 1U 16V 16V 16V 16V 16V 16V MXS_SCK MXS_INT 16V MSP_CS 2C1...

Страница 47: ..._05 KEY_02 KEY_01 DVSS OE WE PSRAM32_CS DVSS WE MXS_MOSI MXS_MISO MXS_SCK 31 MXS_INT DVSS WE EB0 MXS_TMS 9 LCD_K 15 DVSS 1 8V DVSS 3V_SW 1 8V 1 8V 3V_SW 3V_SW DVSS DVSS 18 12 MT45W2MW16 24 23 21 19 20...

Страница 48: ...19 2 5V TRM GND 0 01U 50V 20 10V 50V 0 01U 20 16V VIN DVSS LCD_V4 LP324 20V 20V EN1 GND LCD_V1 5V 2 47U 0 0 SS13 1 00K 24 9K 1 00K 1 00M 2M 121K 562K 124K 124K 1 50M 4 75 4 75 4 75 124K 124K 3 32 249...

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