REL-08B manual ver1_3 - NPI Electronic Instruments
Contents
1. D Electronic Instruments for the Life Sciences made Inga OPERATING INSTRUCTIONS AND SYSIEM DESCRIPIION FOR THE REL 08 B ELECTRODE RESISTANCE METER ELECTRODE RESISTANCE METER REL 08 B VERSION 1 3 npi 2014 npi electronic GmbH Bauhofring 16 D 71732 Tamm Germany Phone 49 0 7141 9730230 Fax 49 0 7141 9730240 support Qnpielectronic com http www npielectronic com REL 08 B User Manual Table of Contents ESTE SEE EE 3 2 NELLA OG Busse 4 ENN 4 PAPE SD eri NUO oe UU etic 4 25 Desenptiom Ob INE Front Pallas 4 2 1 Descriptionor the Rear Pai 6 25 System Bus dnterconnectme EE 7 Di COMING NC 8 version 1 3 page 2 REL 08 B User Manual 1 Safety Regulations VERY IMPORTANT Instruments and components supplied by npi electronic are NOT intended for clinical use or medical purposes e g for diagnosis or treatment of humans or for any other life supporting system npi electronic disclaims any warranties for such purpose Equipment supplied by npi electronic must be operated only by selected trained and adequately instructed personnel For details please consult the GENERAL TERMS OF DELIVERY AND CONDITIONS OF BUSINESS of npi electronic D 71732 Tamm Germany 1 2 3 4 gt GENERAL This system is designed for use in scientific laboratories and must be operated by trained staff only General safety regulations for operating electrical devices should be fol2. max 10 MO Dimensions 305 x 180 x 105 mm W x Dx H version 1 3 page 8
3. es a warm up period of 20 30 minutes is sufficient HANDLING Please protect the device from moisture heat radiation and corrosive chemicals version 1 3 page 3 REL 08 B User Manual 2 REL 08 B 2 1 Components The following items are shipped with the REL 08 B system Electrode Resistance Meter REL 08 B User manual System Bus cable OF 2 2 System Description The REL 08 B unit is designed to measure the resistance of micro electrodes It only works in combination with the EXT 02 B system to which it 1s connected via the system bus The measurement is performed by applying triangle voltage pulses through the system bus to one of the headstages of a EXT 02 B system The triangle pulses are transformed into square current pulses in the headstage and applied to the electrode that 1s connected to the headstage frequency approx 160 Hz The voltage deflection caused by this current injection 15 recorded sent back to the REL 08 B via the system bus and processed to get a direct reading of the electrode resistance in MQ on the digital display The system can be triggered manually with a switch or via TTL pulse with an external device An analog resistance monitor is provided as well Important For correct resistance measurement make sure that the the EXT 02 15 powered on At the STIMULUS CONTROL of the EXT 02 B the switch has to be in OFF position and no TTL HIGH input signal must be applied Also the INPUT MODE switc
4. h of the EXT 02 B must be in SINGLE or DIFF position Also the NOTCH filter has to be turned OFF 2 3 Description of the Front Panel REL 08 B ELECTRODE RESISTANCE METER npi ELECTRODE RESISTANCE MQ POWER ON 2 WA d i 1 or Sor RESISTANCE CHANNEL TEST NE SELECT OFF a GROUND TTL IN OUTPUT 1V Figure 1 REL 08 B front panel view version 1 3 page 4 REL 08 B User Manual In the following description of the front panel elements each element has a number that 1s related to that in Figure 1 The number is followed by the name in uppercase letters written on the front panel and the type of the element in lowercase letters Then a short description of the element is given 1 POWER LED LED indicating that the EXT 02 B is powered on and that the REL 08 B is POWER properly connected to the EXT 02 B 2 POWER switch optional ON Switch for turning the REL 08 B ON upper position or OFF lower position If this switch is installed the POWER LED 1 will only light up if the EXT 02 B is properly connected and the switch is in ON position OFF 3 RESISTANCE TEXT switch Switch for enabling the resistance test function upper position resistance test 1s applied to the electrode selected with the channel select rotary switch 5 lower position resistance test not active TTL enabled 7 ON RESISTANCE TEST Important For correct resis
5. lowed AC MAINS CONNECTION While working with the npi systems always adhere to the appropriate safety measures for handling electronic devices Before using any device please read manuals and instructions carefully The device is to be operated only at 115 230 Volt 60 50 Hz AC Please check for appropriate line voltage before connecting any system to mains Always use a three wire line cord and a mains power plug with a protection contact connected to ground protective earth Before opening the cabinet unplug the instrument Unplug the instrument when replacing the fuse or changing line voltage Replace fuse only with an appropriate specified type STATIC ELECTRICITY Electronic equipment is sensitive to static discharges Some devices such as sensor inputs are equipped with very sensitive FET amplifiers which can be damaged by electrostatic charge and must therefore be handled with care Electrostatic discharge can be avoided by touching a grounded metal surface when changing or adjusting sensors Always turn power off when adding or removing modules connecting or disconnecting sensors headstages or other components from the instrument or 19 cabinet TEMPERATURE DRIFT WARM UP TIME All analog electronic systems are sensitive to temperature changes Therefore all electronic instruments containing analog circuits should be used only in a warmed up condition 1 e after internal temperature has reached steady state values In most cas
6. s for connection of the REL 08 B to a EXT 02 B system Three EXT 02 B in slave configuration can be connected to one EXT 02 B in master configuration One electrode resistance meter REL 08 B and one audio monitor AUD 08 B can also be connected via this system bus 2 RESISTANCE connector This connector provides an analog output voltage corresponding to the measured resistance at the electrode Scaling at this output is I V MQ While the resistance test 1s not active the output voltage is 0 V This output has the same functionality as the OUTPUT 1V MX2 connector 6 on the front panel version 1 3 page 6 REL 08 B User Manual 2 5 System Bus interconnecting devices Connecting multiple devices The System Bus interconnects all amplifiers EXT 02 B in master and slave configuration and monitoring devices REL 08 B AUD 08 B It provides both power lines and all signal lines The number of signal lines depends on the number of connected amplifiers All devices of the B series EXT 02 B REL 08 B AUD 08 B have two SYSTEM BUS connectors at the rear panel 5 Figure 2 To interconnect two or more devices simply use the provided cable and plug it into one of the SYTEM BUS connectors of each device This will result in a chain of devices which has a maximum length of six 1 x EXT 02 B master 3 x EXT 02 B slave 1 x AUD 08 B 1 x REL 08 B The order in which the devices are chained up is not important Since it is a bus s
7. tance measurement STIMULUS INPUT and NOTCH filter have to be turned OFF 4 ELECTRODE RESISTANCE MQ display This display shows the measured resistance of the electrode in MQ while the resistance test is activated XX XX MQ max 10 MQ ELECTRODE RESISTANCE MQ With inactive resistance test the display will read 00 00 MQ 5 CHANNEL SELECT rotary switch 8 position switch for selecting the channel to which the electrode resistance pulse will be applied 6 OUTPUT 1 V MQ connector This connector provides an analog output voltage corresponding to the measured resistance at the electrode Scaling at this output is I V MQ O While the resistance test is not active the output voltage is 0 V This output has the same functionality as the RESISTANCE connector 2 OUTPUT 1V MQ the rear panel version 1 3 page 5 REL 08 B User Manual 7 TTL IN connector BNC connector for an external trigger signal TTL HI resistance is measured LOW resistance 1s not measured TIL IN 8 GROUND connector Banana plug providing ground The plug is connected internally to the shields of BNC connectors GROUND 2 4 Description of the Rear Panel MONITORING RESISTANCE IV MQO npi A AD Version RES 08B Serial Nr Date Figure 2 REL 08 B rear panel view 1 SYSTEM BUS connector see also chapter 2 5 50 pin connecter providing power lines and data line
8. ystem all positions are treated equally Channel addresses When using monitoring devices REL 08 B AUD 08 B it is important that each recording channel has its dedicated address i e that there is no more than one channel on a single address number This can be achieved by selecting a channel s address number with the CHANNEL ADDRESS rotary switch 3 Figure 2 on the rear panel of the EXT 02 B in slave configuration The EXT 02 B in master configuration does not have a CHANNEL ADDRESS rotary switch Its recording channels will always addressed to 0 for channel A and I for channel B Therefore the selectable addresses for the EXT 02 B in slave configuration begin at 2 and go up to 7 Each recording channel can be monitored either acoustically with the AUD 08 B or its electrode resistance can be measured with the REL 08 B These devices have a CHANNEL SELECT rotary switch on their front panel whose numbers correspond to the channel address number selected at each channel of the EXT 02 B Important For correct resistance measurement make sure that the the EXT 02 B 1s powered on At the STIMULUS CONTROL of the EXT 02 B the switch has to be in OFF position and no TTL HIGH input signal must be applied Also the INPUT MODE switch of the EXT 02 B must be in SINGLE or DIFF position Also the NOTCH filter has to be turned OFF version 1 3 page 7 REL 08 B User Manual 3 Technical Data Output range 10 V impedance 50 Q Display XX XX MQ
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