====== Malone Electronics DMMcheck plus voltage/current/resistance/frequency reference (til kalibrering af multimetre etc.) ======

^QR-ID       | HQR244 HQR1027         |
^Navn        | Malone Electronics DMMcheck plus  |  
^Kort beskr. | Kalibreringsdims til multimetre |
^Indehaver   | HAL9k |
^Lokale      | Elektronikværksted |
^Tilladt brug | No hacking allowed. Alm. brug tilladt |
^Manual      | {{:equipment:instruments:hal9k_dmmcheck_plus.pdf|}} |
^Kalibreringscertifikat 2022 | {{ :equipment:instruments:dmmcheckcert.jpg?linkonly |}} |

https://dmmcheckplus.com/

Enhed til kalibrering/test af multimetre. Det er en konstantstrøms- og konstantspændingsgenerator ved DC og AC (ikke sinus, bare firkant) ved hhv. 100 Hz og 10 kHz. Derudover indeholder den en række præcise modstande, kondensatorer og spoler.

Se pdf'en for en kalibreringsattest af den.

Den er indkøbt september 2016 og re-kalibreret februar 2022. Den har to frekvenser: 100 Hz og 10 kHz. 100 Hz får man ved at sætte AC/DC switchen på AC ved startup eller første gang man sætter switchen til AC efter startup. Derefter skifter man imellem 10 kHz og 100 Hz hver gang man skifter til AC fra DC.

Billede af dimsen: http://arcslab.com/wp-content/uploads/dmmcheck_plus_unit.jpg

====== Multimeter showdown ======

^Multimeter |Pris   |5V DC |5V 100Hz |5V 10kHz|1mA DC |1mA 100Hz|1mA 10kHz|100Ω  |  1 kΩ|  10 kΩ|100 kΩ |100Hz|10kHz|
^Uni-T UT33D|120DKK |5.01 |05.0/05.1|02.3V  |1004 μA|n/a        |n/a        |99.9Ω |999.9Ω|10.00kΩ|100.0kΩ|n/a|
^Uni-T UT58B|300DKK |4.98 |5.50     |6.89   |1.000mA|1.102mA    |.974mA     |102.8Ω|.999kΩ|10.00kΩ|0.099MΩ|n/a|
^Fluke 185  |2300DKK|5.000|4.995    |4.505  |1.000mA|1.000/.999 |0.928mA   |100.3|.999kΩ|09.99kΩ|100.0kΩ|100.0Hz|10.00kHz|
^ELRO M-940 |99DKK  |5.00 | 5.1 | 3.8 | - | - | - | 100.0Ω | 1001Ω | 10.00kΩ | 100.0-100.2kΩ | n/a | n/a |
^Brymen BM235|700DKK|4.995|4.8|0.003|1001μA|988μA|3.3μA|99.9Ω|0.999kΩ|10.00kΩ|100.0kΩ|99.99Hz|9.999 kHz|
^Fluke 289 |3000 kr. brugt|5,0000 V|5,0033 V|4,9360 V|1000,1 μA|1001,2 μA|996,8 μA|100,26 Ω|1,0000 kΩ|10,004 kΩ|100,07 kΩ|100,00 Hz|10,000 kHz|
^Fluke 87 |400 kr. brugt|4,993 V|5,02 V|4,90 V|999 μA|1002 μA|997 μA|100,2 Ω|1,000 kΩ|10,00 kΩ|100,0 kΩ|100,00 Hz|10,000 kHz|
^Fluke 45 | 400 kr brugt|4,9989 V| 4.9985 V|4.9755 v| 1.0009 mA|1.0021 mA|0.9984 mA|100.10 Ω|1.0000 kΩ|10.000 kΩ| 100.06 kΩ|100.01 Hz|10.001 kHz|
^UNI-T ut61e | 320.97 kr |4,993 V|5.027 V |5.150V|0.999mA|1.001mA|0.933mA|100.11Ω|  0.9976 kΩ|  9.992 kΩ|99.98 kΩ |100.0Hz|10.001kHz|
^Fluke 179 |????   |4.997V |4.985 V|2.528 V|1.01 mA |1.01 mA|0.59 mA|100.1 Ω  |  1.000 kΩ|  10,00 kΩ|100.0 kΩ |100.0 Hz|10.00 kHz|
^Philips PM97 | 500 kr | 5.02V | 4.97V | 4.97V | N/A| N/A | N/A | 100.6 Ω | 1.000k Ω | 9.98k Ω | 99.8k Ω | 100Hz | 10.0kHz | 
^Fluke 8000a | ???? | 4.98v | N/A | N/A | 0.992 mA | N/A | N/A | 100.3 Ω | 0.996k Ω | 9.96k Ω | 99.9k Ω | N/A | N/A |
^TECPEL 125 | ???? | 5.00v | 5.52v | 1.149v | 0.98mA | 1.06mA | 0.02mA | 100.4 Ω | 1.002k Ω | 10.00k Ω | 100.5k Ω | N/A | N/A | 
^Fluke 179 (emils) | firma | 5.000v | 4.985v | 2.531v | 1.02mA | 1.01mA | 0.59mA | 100.3 Ω | 1.001k Ω | 10.00k Ω | 100.1kΩ | 100.0Hz | 10.00kHz |
^Brymen BM869s |1875 kr. |5,00027 V DC |4,9985 V 100Hz |4,9668 V 10kHz|1000,3 uA DC |1000,8 uA 100Hz|1000,0 uA 10kHz|100,04 Ω  |  0,9999 kΩ|  10,004 kΩ|100,11 kΩ |100,00 Hz|10,000 kHz|
^Agilent 34401a | 800 kr | 5.000,00v | 4.997,86v | 5.001,36v | 1.000,13 mA | broken | broken | 100.143,1 Ω | 0.999,885 kΩ | 10.001,97 kΩ | 100.091,5 kΩ | 100.004,4 Hz | 10.000,43 kHz |
^Keithley DMM6500 | 7000 DKK | 4.99991 V | 4.99944 V | 4.98406 V | 1.000055 mA | 0.999967 mA | 0.990999 mA | 100.0725 | 0.999812 | 10.00187 | 100.0902 | 100.0049 | 10.00049 | 
^121GW SN906 | Penge | 4.9998 V | 4.9931 V | 5.0224 V | 0.9945 mA | 0.9947 mA | 100.11 | 0.9996 | 9.999 | 100.006 | 999.97 Hz | 9.9998 Hz |
^121GW SN907 | Penge | 5.0004 V | 5.0006 V | 5.0808V | 0.9703 mA | 1.0011 mA | 0.9692 mA  | 100.10 | 0.9998 | 10.000 | 100.06 | 100.00 | 10.000 |
^TTI 1906 Computing Multimeter | Penge | 4.9995 V | 5.9970 V | 4.9634 V | 1.00008 mA | 1.00010 mA | 1.00012 mA | 100.155 | 0.99988 | 10.0023 | 10.0023 | 100.090 |
^Keithley 2750 |1000|5.00005v|4.99542v|4.99180v|1.00015mA|0.001287A|0.001190A|100.0596Ω|0.999841Ω|10.00276kΩ|100.1022kΩ|100.0042Hz|10.00042kHz|