Ian Johnston Engineering PDVS2mini Скачать руководство пользователя страница 13

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HARDWARE

The following relate to items on the Pcb (printed circuit board):

FUSE 1

1A time delay fuse (Schurter UMZ 250 series).

3.3Vdc supply to ICSP header. Default = shorted.

ICSP

In Circuit Serial Programming header, used for uploading new firmware.

JP1

Linking this bypasses the (soft) power switch.

Содержание PDVS2mini

Страница 1: ...Model PDVS2mini A multitude of uses as a calibrator reference and fully adjustable precision voltage source Handmade in Great Britain by Ian Johnston Manual Version 1 0 19 10 19 Ian Johnston Engineer...

Страница 2: ...FIRMWARE UPGRADE 9 10 WINDOWS PC APPLICATION 11 HARDWARE 12 FREQUENTLY ASKED QUESTIONS 13 PRODUCT DISCLAIMER WARRANTY 14 CE CERTIFICATE DECLARATION 15 CALIBRATION RECORD BLANK 16 The screenshots phot...

Страница 3: ...oltage reference Uses an LM399AH 0 5 1 ppm degC temperature coefficient 0 00000 Vdc to 10 00000 Vdc in 10 uV 0 00001 Vdc steps Load 3kohm minimum Example At 10Vdc output with 3kohm load 3 3mA whilst m...

Страница 4: ...is the batteries The best performance of the unit is when the batteries are being used to supply power without any external power External DC input cable wiring Red Blk The battery terminals and the e...

Страница 5: ...n off charging via the SETTINGS menu Without this you may get OVER on the display Please observe the minimum external DC supply voltage NOTES When running with batteries and also an external DC input...

Страница 6: ...l Best Stability For the most accurate and stable output it is highly recommended to run the unit from the batteries with no external DC power input This helps avoids any ground loop noise entering th...

Страница 7: ...col BAUD 250k N 8 1 Rate Data from PDVS2mini to PC is sent every 100mS Format to PC VR0 0 12345 Format from PC KeyVoltage 0 1 23456 The following details all the data being sent from the PDVS2mini and...

Страница 8: ...imum current should be approx 250mA so the default setting here of 400mA gives some margin Charge Full mA Current mA at which the battery is determined to be near full The charging circuit is self con...

Страница 9: ...10 00000 XXXXXXX Counts for 10 00000Vdc output Out Vdc XX X XXXX Output monitor counts Calibration of the output DC voltage monitor Batt DC Vdc XX X XXXX Battery Ext power supply Vdc Span counts Cali...

Страница 10: ...le co uk avrdudess a gui for avrdude A HEX file will be supplied for the upgrade The current calibration settings will not be overwritten but it is advisable to have them written down Please refer to...

Страница 11: ...oth ends type from the PDVS2mini ICSP header to the AVR Dragon ISP header note orientation and pin1 On Atmel Studio Select AVR DRAGON ATmega1284 ISP then hit APPLY The PDVS2mini will be interrogated y...

Страница 12: ...PC then double click on SETUP EXE Follow the on screen prompts to install the app If the app install fails then see below Turn on COMMS on the PDVS2mini by holding down the LEFT RIGHT buttons Start th...

Страница 13: ...e Pcb printed circuit board FUSE 1 1A time delay fuse Schurter UMZ 250 series J1 3 3Vdc supply to ICSP header Default shorted ICSP In Circuit Serial Programming header used for uploading new firmware...

Страница 14: ...d charge them separately in a standalone charger This will match them again and you can return them to the PDVS2mini If this problem persists then you may have a faulty weak battery Q Can I run the PD...

Страница 15: ...product may directly threaten life or injury The user of Ian Johnston Engineering Ltd products in life support aircraft applications or other such critical activities assumes all risks of such use an...

Страница 16: ...15...

Страница 17: ...00 4 00000 5 00000 6 00000 7 00000 8 00000 9 00000 10 00000 FUNCTION COUNTS Out Vdc Batt Vdc Charge mA Batt Low Shutdown Charge Enable Charge Overload mA Charge Full mA TEST Serial Comms Soak Test Dur...