Equipment information:

Thurlby Thandar Instruments TTI BS407 Level Meter
Manufacturer:
Thurlby Thandar Instruments TTI
Model: BS407
Date: 2009
Category: Measurement instruments
Group: Level Meter
Description: PRECISION MILLI/MICRO OHMMETER
Information:
                                    The BS407 is fully optimised for accurate measurement of low resistances with a best resolution of 1μΩ. It has applications beyond the testing of components such as measuring the resistance of motor or transformer windings, the properties of materials, the thickness of plates, the security of pipework joints or wiring installations and many others.
It uses a Direct Current technique to measure true resistance, rather than the resistive component of impedance which is shown by AC excited RLC bridges. The test current for each range has been carefully chosen to minimise heating of the sample under test while being sufficient to minimise the effects of thermal emf and noise. This gives much greater accuracy at low resistances than can be obtained from the very low test currents used by general purpose high resolution multimeters. The low-noise low-drift bipolar amplifiers employed need much less noise filtering than alternative chopper stabilised technologies resulting in faster settling to the correct reading.
The BS407 uses a four terminal measurement system and is supplied with a set of high quality Kelvin clip leads. For speed and convenience front panel switches are provided for current diversion (allowing in-situ zero adjustment) and current reversal (for identifying thermal emf effects). An indicator lamp confirms correct flow of the measuring current thus preventing spurious results from being recorded.
The BS407 has eight push-button selected decade measurement ranges from 1999μΩ up to 19.99kΩ. A front panel operated ‘clamp’ switch is available to limit the maximum voltage across the unknown to 20mV. This is a requirement for the measurement of switch contact resistances to international standards. With a lowest range of 1999μΩ the BS407 can resolve 1μΩ. Precision analogue circuitry ensures high measurement accuracy of up to 0.1% of reading ±1 digit.
The BS407 is a fully portable instrument which operates from NiMH rechargeable batteries. Stabilised internal operating conditions ensure that readings do not vary with the state of the battery charge. The battery charger is built into the instrument and can be operated while measurements continue

These manuals are available for the above equipment:

Thurlby Thandar Instruments TTI -- BS407 -- User Manual
File name: Thurlby-4719-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 50
Size: 705.34 Kbytes (722268 Bytes)
Language:
Revision: Issue 4
Manual-ID/Number: 48581-1310
Date: 2009
Quality: Electronic document, no scan, very well readable.
Upload date:
MD5: c0e9193d119a1db62b1b0c50e7b5a449
ed2kID: 141f96ae04d418f34ccb5d3b89e650d1
Downloads: 178 since 02 November 2013
Information:
Introduction 2
Specification 3
EMC 5
Safety 6
Installation 7
Connections 8
Front Panel Controls 9
Operation 10
Maintenance 13
Instructions en Francais
Sécurité 14
Installation 15
Connexions 16
Commandes du panneau frontal 17
Fonctionnement 18
Maintenance 22
Bedienungsanleitung auf Deutsch
Sicherheit 23
Installation 24
Anschlüsse 25
Frontplatten-Bedienungseinrichtungen 26
Betrieb 27
Reparatur 31
Istruzioni in Italiano
Sicurezza 32
Installazione 33
Collegamenti 34
Controlli sul pannello frontale 35
Operazione 36
Manutenzione 39
Instrucciones en Español
Seguridad 40
Instalación 41
Conexiones 42
Controles del panel frontal 43
Funcionamiento 44
Mantenimiento 48
Thurlby-4719-Manual-Page-1-Picture
Start Free Download


Thurlby Thandar Instruments TTI -- BS407 -- User Manual
File name: Thurlby-4747-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 50
Size: 284.05 Kbytes (290865 Bytes)
Language:
Revision: Issue 5
Manual-ID/Number: 48581-1310
Date: 2013
Quality: Electronic document, no scan, very well readable.
Upload date:
MD5: 05a15e2ec85dfe5bfca0a668119ea7c3
ed2kID: 49b9e118174c99a64521dee1308d2638
Downloads: 129 since 03 November 2013
Information:
Introduction 2
Specification 3
EMC 5
Safety 6
Installation 7
Connections 8
Front Panel Controls 9
Operation 10
Maintenance 13
Instructions en Francais
Sécurité 14
Installation 15
Connexions 16
Commandes du panneau frontal 17
Fonctionnement 18
Maintenance 22
Bedienungsanleitung auf Deutsch
Sicherheit 23
Installation 24
Anschlüsse 25
Frontplatten-Bedienungseinrichtungen 26
Betrieb 27
Reparatur 31
Istruzioni in Italiano
Sicurezza 32
Installazione 33
Collegamenti 34
Controlli sul pannello frontale 35
Operazione 36
Manutenzione 39
Instrucciones en Español
Seguridad 40
Instalación 41
Conexiones 42
Controles del panel frontal 43
Funcionamiento 44
Mantenimiento 48
Thurlby-4747-Manual-Page-1-Picture
Start Free Download


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