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Summary of Contents for DM501A

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Page 3: ...onal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one re...

Page 4: ...Use only the power cord and connector specified for your product Use only a power cord that is in good condition Refer cord and connector changes to qualified service personnel Use the Proper Fuse To...

Page 5: ...ges exist at several points in this product To avoid personal injury do not touch exposed connections and components while power is on Disconnect power before removing protective panels soldering or r...

Page 6: ...OM 501A OM SOiA Oigita Multlmeter xiv AUG 1980...

Page 7: ...easurement capabilities are deleted for Option 2 In struments Performance Conditions The electrical characteristics are valid only if the OM 501A has been calibrated at an ambient temperature between...

Page 8: ...V 20 V Input signal must be between 5 and 200 V and 500 V ranges 100 of full scale The 500 V range 18 C to 28 C requires a dynamic input signal between 500 V and 100 V rmso 200 mV to 200 V ranges 40 H...

Page 9: ...k Crest Factor 4 at full scale DECIBELS dB TRUE RMS Accuracy for 40 dB 20 dB o dB 20 dB and 40 dB ranges 18 C to 28 C 20 dB to 15 dB 0 5 dB 20 Hz to 20 kHz 15 dB to 20 dB 0 5 dB 20 Hz to 2 kHz Typical...

Page 10: ...OHMMETER 0 15 of reading 0 015 of full scale 0 3 of reading 0 015 of full scale 0 5 of reading 0 015 of full scale 0 3 of reading 0 025 of full scale 1 2 of reading 0 025 01 full scale Supplemental I...

Page 11: ...uA 1 0 kO 2 rnA 100 0 0 20 rnA 10 2 0 200 rnA 1 2 0 2000 rnA 0 4 0 Maximum Input Current 2 A any range Maximum Open Circuit Input 250 V peak Voltage rnA to LOW Maximum Floating Voltage rnA to ground 1...

Page 12: ...ground i 1000 V peak LOW to ground i 1000 V peak Input Connectors Front panel only Maximum Resolution 1 0 n A TEMPER ATURE Accuracy for the 62 C to 240 C range 18 C to 28 C ambient Probe calibrated t...

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Page 14: ...reading 0 2 of full 10 kHz to 20 kHz i scale Q C to 18 C 28 C to 50 C 200 mV to 200 V range 40 Hz to 10 kHz 1 8 of reading 0 075 of full scale 20 Hz to 40 Hz and 2 3 10 of reading 0 075 of full 10 kHz...

Page 15: ...15 of full scale 0 02 0 O C to 1S C 2S C to 50 C 200 0 to 200 kO LO n 0 3 of reading 0 025 of full 2 kO to 2000 kO HI 0 scale 0 02 0 2000 kO LO 0 1 2 of reading 0 025 of full 20 MO HI 0 scale 0 02 0 T...

Page 16: ...800B class 3 Meets or exceeds M I L T 28800B class 3 Meets or exceeds M I L T 28800B class 3 Operating 20 kV max No M I L T 28800 equivalent Charge applied to Transportation Vibration Package Drop See...

Page 17: ...standards as plug in Meets same test standards as plug in 0 26 mm 0 010 in disp 1 0 55 Hz sine wave 75 min total 20 g s 1 2 sine 1 1 ms 18 shocks Meets same test standards as plug in Meets same test s...

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Page 19: ...e inter connecting jack of the selected power module compart ment match the cut outs i n the OM S01A circuit board edgeconnector If they don t match do not insertthe plug in until proper identificatio...

Page 20: ...display reads between 10 and 100 of the full scale reading This particular range will give maximum resolu tion When an input signal causes the display to read greater than 19999 an overrange blinking...

Page 21: ...Operating Instructions OM SOlA FIg 2 2 Controls and connectors REV A AUG 1980 English 2 3...

Page 22: ...displayed value to the selected range For example a 15 6 displayed reading on the 20 dB range cor responds to a 35 6 dB signal When in the 40 dB range the maximum displayed value must be limited to 1...

Page 23: ...vice Center for service or repair attach a tag showing owner with address and the name of an REV A AUG 1980 Operating Instructions OM SOlA individual at your firm that can be contacted I nclude the co...

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Page 25: ...OM 501A Japanese 2 3...

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Page 27: ...R A de voltage applied to the VOLTS oconnector passes through switches Sl C and Sl E to the top of the attenuator resistor series network conSisting of R 1 1 12A R l 1 04 20 Vdc R 1 1 12B R l l l 0 20...

Page 28: ...ture RT1633 will effectively open or achieve a very high resistance thus limiting the i n put current to U 1 539 Sl L In the 200 mVac range position switch 52 C activates relay K1528 which sets the AC...

Page 29: ...o Digit Select Oriver U1701 pin 1 The output of U1701 pin 16 turns on diodes CR160S and CR1607 disabling the digit select lines for the two least significant digits i n the display OS1200 and OS1101 S...

Page 30: ...1 0 k The O hms Reference Current Source 01415 and associated circuitry generates a 100 fJ A reference current This current either flows through R1516 or R1516 in parallel with theseries combination...

Page 31: ...by R 1505 2 Vdc The200 mV full scale input for the aid converter is set by R1504 200 mVdc when the relay K1505 is energized through switches Sl and S2 The 2 Vdc 0 R1405 is used to set the initial zero...

Page 32: ...__ __ __ __ __ __ __ __ __ __ __ __ OUTPUT COUNTER CONTENTS 0 Measure Interval Timing VIN 1 V Fig 3 7 Measure interval liming DUTY CYCLE COUNTER CONTENTS 14 CONVERTER STATE M Z U D INTEGRATOR OUTPUT...

Page 33: ...STATE 0 1 2 3 4 5 CLOCK 6 Theory of O peration OM SOIA Display Driver 0 Display driver U1805 is a bcd to 7 segment decoder The bcd digit information is decoded by U1805 and applied to Ihe cathodes of...

Page 34: ...rectified by CR1424 and CR1426 and applied to U 1 431 This three terminal regulator provides the 5 V source 3 8 All three terminal regulators are internally current limited 32 CLOCK J r I S40 CLOCK C...

Page 35: ...procedure Calibration Interval To ensure i nstrument accuracy check the cali bration every 1 000 hours of operation or at a minimum of every six months if used infrequently Services Available Tektroni...

Page 36: ...ck Dc Voltage Accuracy a Set the de voltage calibrator for a minimum output voltage b Press the VOLTS DC function push button switch c Connect the de voltage calibrator to the VOLTS n and LOW connecto...

Page 37: ...m V range push button e Set the ac calibrator for 1 V ac rms output at either 50 or 60 Hz 0 2 Hz f Check the display for a reading of 01 41 4 Check Ac Voltage Accuracy a Connect the ac voltage calibr...

Page 38: ...s within the display limits for the ambient temperature as listed in Table 4 8 4 4 e Remove the AC current source and all connections 9 Check Temperature Accuracy a Connect the temperature probe to th...

Page 39: ...V 1000 7 to 999 3 1 001 5 to 998 5 Table 4 3 FRON T PANEL AC VOLTAGE ACCURACY DISPLAY LIMITS Ac Calibration Ambient Temp Range Ambient Temp Range Voltage 18 C to 28 C O C to 1 8 C 28 C to 50 C 40 Hz...

Page 40: ...n a 2 is displayed the OM SOlA overranges flashing display and illuminates the upper segment of the 1 in the most significant digit Range 40 dB 40 dB 40 dB 20 dB 20 dB 20 dB Table 4 5 FRONT PANEL dBV...

Page 41: ...2 to 1 9 032 10 1 9 062 to 19 062 to 18 968 1 8 968 1 8 938 18 938 1 90 00 kO 190 32 to 1 90 32 10 1 90 62 10 I 1 90 62 to I 189 68 1 89 68 189 38 I 189 38 1 900 0 kO 1903 2 to 1 906 0 10 1906 2 10 19...

Page 42: ...librated To Instrument Any Probe Ambient Temp Range Ambient Temp Range 18 C to 280 C DOC to 18 C 18 C to 28 C O C to 18 C 28 C to 50 C 28 C to 50 C 62 C 60 to 64 58 5 to 65 5 58 to 66 56 5 to 67 5 125...

Page 43: ...to 19 357 t o 19 452 to 1 8 686 18 610 1 8 643 18 548 190 00 V 1 93 1 4 to 193 90 to 193 57 t o 194 52 to 1 86 86 186 10 1 86 43 185 48 190 00 V 1 94 0 to 194 8 to 1 94 9 t o 195 9 to 1 86 0 185 2 1 8...

Page 44: ...displayed the OM SOlA overranges flashing display and Illuminates only the upper segment of the l in the most significant digit Range 40 dB 40 dB 40 dB 20 dB 20 dB 20 dB Table 4 14 REAR INTERFACE dBV...

Page 45: ...the right side compartment of the power module with its unused compartments on the left side Make adjustments at an ambient temperature between 2 1 C and 25 C 70aF and 77aF 1 Check Power Supplies a Se...

Page 46: ...ble 4 16 set the range and the required ac calibration voltage Adjust the selected control for the required display reading 4 12 k Set the ae voltage calibrator to a minimum voltage I Remove connectio...

Page 47: ...ing of 000 2 to 000 2 f Place the temperature probe in a 100 0 C environ ment Allow enough time for the display reading to stabilize g Adjust R1831 TEMP Set for a display reading of 99 7 to 100 3 h In...

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Page 49: ...ICATION AND DESCRIPTION Test instrument identification 1 2 Forms records and reports 2 2 Calibration description 3 3 SECTION II EQUIPMENT REQUIREMENTS Equipment required 4 4 Accessories required 5 4 I...

Page 50: ...Voltage Probe Ballantine Model 10800C John Fluke Model 80K 40 and Tektronix Type 010 0277 00 The manufacturer s manuals were used as the prime data sources in compiling these instructions The equipme...

Page 51: ...500 V in 4 ranges Frequency 20 Hz to 20 kHz Accuracy of reading digits Range 20 to 40 Hz 1 2 2 40 Hz to 10 kHz 0 7 2 10 to 20 kHz 1 2 2 Tektronix Type DM 501A Dc voltage Range 0 to 1000 V in 5 ranges...

Page 52: ...ry Transfer Calibration Standards Set AN GSM 286 Alternate items may be used by the calibrating activity The items selected must be verified to perform satisfactorily prior to use and must bear eviden...

Page 53: ...paragraphs 6 and 7 are preparatory to the calibration process Personnel should become familiar with the entire bulletin before beginning the calibration b Items of equipment used in this procedure ar...

Page 54: ...CTION switch to 2 DC VOLTS and set INPUT INT to OUT EXT out 2 Short INPUT HI and LO terminals If TI does not indicate 0000 perform b below 3 Remove short and connect calibrator OUTPUT terminals to TI...

Page 55: ...st calibrator s output adjustment control for a calibrator control display reading equal to the TI s indication The calibrator s control display ERROR indication will be 0 31 percent if not perform b...

Page 56: ...n table 5 TI will indicate within the limits specified b Adjustments Adjut R50 CURRENT ZERO fig 1 until TI indicates 0000 R Table 5 Dc Current Test instrument Test instrument indications RANGE FUNCTIO...

Page 57: ...required 12 Power Supply NOTE Do not perform power supply check if all other parameters are within tolerance a Performance Check 1 Connect digital multimeter between TP 1 PIN 24 5V fig 1 and chassis...

Page 58: ...erify the result of each test and whenever the test requirement is not met take corrective action before continuing with the calibration Adjustments required to calibrate the TI are included in this b...

Page 59: ...pushbutton and set calibrator output as specified in table 7 If TI does not indicate within the specified limits perform adjustments indicated b Adjustments 1 Adjust 2 V DC 0 R1405 fig 2 until TI indi...

Page 60: ...calibrator output as listed in table 8 TI will indicate within the specified limits if not perform adjustments indicated NOTE In the following table interaction may occur in the adjustments of R1525...

Page 61: ...S and LOW terminals Press TI AC TRUE RMS and dB pushbuttons 3 Press dB range pushbutton and set calibrator output as listed in table 9 TI will indicate within the specified limits if not perform adjus...

Page 62: ...onnect calibrator OUTPUT to TI input VOLTS and LOW terminals 2 Press TI 20 k pushbutton and release HI LO pushbutton HI 3 Set calibrator for a nominal 19 k output Adjust calibrator s output adjustment...

Page 63: ...HIGH VOLTAGE PROBE BALLANTINE MODEL 10800C JOHN FLUKE MODEL 80K 40 AND TEKTRONIX TYPE 010 0277 00 22 Preliminary Instructions a The instructions outlined in paragraphs 22 and 23 are preparatory to the...

Page 64: ...ital multimeter Type DM 501A ensuring RED or positive terminal at banana plug mates with VOLTS terminal on digital multimeter On Type DM 501 ensure that RED or positive terminal of banana plug mates w...

Page 65: ...TANDBY then press RESET pushbutton 5 Replace cover and screws on termination box 25 Final Procedure a Deenergize and disconnect all equipment and reinstall protective cover on TI b Annotate and affix...

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