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Table of Contents
Summary of Contents for Ian Johnston Engineering PDVS2
- Page 1 HANDHELD PRECISION DIGITAL VOLTAGE SOURCE Model PDVS2 A multitude of uses as a calibrator, reference and fully adjustable precision voltage source. Handmade in Great Britain by Ian Johnston Manual Version 1.2 (27/04/17) Ian Johnston Engineering Ltd. | www.ianjohnston.com | ian@ianj.net...
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Page 2: Table Of Contents
INDEX FUNCTIONS & FEATURES SPECIFICATION SUMMARY OPERATION OF INSTRUMENT MAIN PLAYBACK MODE RAMP MODE COMMS ON/OFF 2V/10V MODE SETTINGS CALIBRATION BACKLIGHT ON/OFF FIRMWARE UPGRADES PDVS2 WINDOWS APPLICATION HARDWARE FREQUENTLY ASKED QUESTIONS PRODUCT DISCLAIMER & WARRANTY CALIBRATION RECORD... -
Page 3: Functions & Features
FUNCTIONS & FEATURES True 0 Vdc to 10 Vdc user adjustable output in 10 V mode (4d.p’s effective, 38.146uV). A 2nd mode offering 0.01 Vdc to 2.0 Vdc user adjustable output (5d.p’s effective, 10 uV). Voltage setting or ramp up/down controls via the 12 button numeric keypad. ... -
Page 4: Operation Of Instrument
OPERATION OF INSTRUMENT Power on: Press and hold the power button. Power off: Press and immediately release the power button. The LCD will clear and the LED will turn off. The unit will provide a low battery warning at 13.0Vdc and will auto shutdown at 12.5Vdc. Both settings are adjustable via settings. -
Page 5: Main
MAIN Setting an output: Simply type the voltage required using the keypad. Use the ‘ ’ key as the dp., and use the ‘#’ as ENTER. Note: The voltage being set will be displayed on the LCD as you type. ↵... -
Page 6: Playback Mode
PLAYBACK MODE Playback mode: The user can set up 5 voltages that can be played back over time. Each one of the 5 has a time in seconds associated with it. At the bottom of the screen is the menu. 1-5=EDIT EDIT VOLTAGE / TIME: Press 1, 2, 3, 4 or 5 to edit the voltage and time for that line. -
Page 7: Ramp Mode
RAMP MODE Ramp mode: The user can set up 5 voltages that can be played back over time with the output ramping up or down between the adjacent voltages. Each one of the 5 has a time in seconds associated with it which determines how long the ramp should take between the adjacent voltages. -
Page 8: Comms On/Off
COMMS ON/OFF Enable or disable the USB serial comms traffic. On power up the unit defaults to OFF. This option does not inhibit the USB port detection in Windows only the serial data traffic, so when you connect via USB to a PC (Windows) the port will auto-detect but no data will transfer until comms is enabled. -
Page 9: 2V/10V Mode
2V/10V MODE This switches the unit between the 10Vdc FSD mode and the higher resolution 2Vdc FSD mode. 10V mode True 0Vdc to 10Vdc user adjustable output, 4 dp’s effective, 38.146uV steps. Note: In this mode the 5 dp is presented and can be controlled but will not necessarily render a change to the voltage output as the resolution is 38.146uV’s. -
Page 10: Settings
SETTINGS User adjustable settings. Batt. Low Ind. Battery voltage at which the unit displays BATTERY LOW. Batt. Low Shutdown Battery voltage at which the unit will auto-shutdown. Batt. Chg. Enable Enable / disable battery charging. This setting is useful when an external DC source is used but the user doesn’t want the batteries to charge. -
Page 11: Calibration
CALIBRATION User adjustable / factory calibration. 2vZero 0.01000 Zero counts in 2Vdc mode Calibration of the 18bit DAC output. 2vSpan 2.00000 Span counts in 2Vdc mode Calibration of the 18bit DAC output. 10vZero 0.0000 Zero counts in 10Vdc mode Calibration of the 18bit DAC output. 10vSpan 10.0000 Span counts in 10Vdc mode... -
Page 12: Backlight On/Off
BACKLIGHT ON/OFF Enable or disable backlighting. When enabled the backlighting only comes on when keypresses are made or when the rotary encoder is used, at which point the backlighting will illuminate for 5 secs. Press the rotary encoder switch at any time to illuminate the backlighting. On power up the unit defaults to backlighting ON. -
Page 13: Firmware Upgrades
FIRMWARE UPGRADES Occasionally updated software for both the PDVS2 and the Windows app may be available. The current version numbers/dates will also be published at www.ianjohnston.com, contact us to request the upgrade files. The process to upgrade is as follows:... -
Page 14: Pdvs2 Windows Application
Playback & Ramp modes and also Calibration. Note: By default at power up the PDVS2 comms is disabled, e.g. the USB port will be detected but no communications will occur. See option 4 on the PDVS2 main menu. -
Page 15: Hardware
HARDWARE The following relate to items on the Pcb (printed circuit board): FUSE 1 315mA time delay fuse (Schurter UMZ 250 series). FUSE 2 1A time delay fuse (Schurter UMZ 250 series). 3.3Vdc supply to ICSP header. Default = open. ICSP In Circuit Serial Programming header, used for uploading new firmware. -
Page 16: Frequently Asked Questions
PDVS2 that it suddenly stops charging and the charge current drops to 0mA. To fix this, remove the batteries from the PDVS2 and charge them separately in a standalone charger. This will match them again and you can return them to the PDVS2. -
Page 17: Product Disclaimer & Warranty
Customer's exclusive remedy under this Limited Warranty shall be the repair or replacement, at Company's sole option, of the Product, or any part of the Product, determined by Ian Johnston Engineering Ltd to be defective. In order to exercise its warranty rights, Customer must notify Company. -
Page 18: Calibration Record
PDVS2 - CALIBRATION RECORD FUNCTION COUNTS VOLTAGE OUTPUT 2vMode Zero 2vMode Span 10vMode Zero 10vMode Span FUNCTION COUNTS Out.Vdc Batt.Vdc Charge mA FUNCTION SETTING Batt. Low Ind. Batt.Low Shutdown Batt. Chg. Enable Batt. Chg. O’L mA Batt. Chg. Full mA B.Light Enable boot...
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