About this page
Engineers may find some useful calculators and online apps on this page, covering specific needs, such as common helpers for components and circuits analysis and calculation.
Some of datalogs using python and D3.js library are presented for DMM tests and various components performance study purpose.
IRF IR3899 POL DC-DC Calculator kit – Configuration calculator for IRF IR3899
Linear LTZ1000 Ultra-zener calculator kit – Circuit simulator and components calculator
Linear LM399 Precision reference calculator kit – Circuit simulator and components calculator
Linear LT3081 positive LDO calculator kit – Circuit simulator and components calculator for LDO
LED toolkit
Basic engineering calculator – Simple convertors and electronics calculators
Resistance calculator – Resistive networks calculator
Resistor SMD-codes and designators
Hamon-style precision divider calculator
Percentage calculator – Simple 10-value calculation for percentage of two variables
PPM/DMM spec calculator – Calculator to help with accuracy calculations, ppm conversions and tempco effects
Noise converter/calculator – Simple helpers for opamp calculations
7V -> 10V opamp compensated simulator – Opamp-based voltage ratio circuit for precision 7V -> 10.000000V conversion.
4 x HP3458A Realtime datalog compare – 4xHP3458A comparison graphs
DMM noise performance comparison
Big Keithley DMMs test on 10VDC – 3458A vs 2×2002 vs 4×2001 DMMs.
Realtime datalog 1
Realtime datalog 2 – Running 3458A debug Python app now, 24-NOV-2015
Realtime datalog 3 – Test with modified ADC resistors in HP 3458A
Realtime datalog M1 – Realtime log of HP 3458A (4188) sampling 10V standard. Both internal and external temp,RH and pressure monitored.
Realtime datalog M2 – Realtime log of HP 3458A (8451) sampling 10V standard. Real Option 002 unit.
Realtime datalog M3 – Realtime log of HP 3458A (2157) sampling 10V standard. Bad(repaired) A3 test.
Voltage transfer experiment – LTZ A9 transfer log
Voltage transfer experiment, ACAL – LTZ A9 transfer log, ACALed 3458A reading F732
TiN’s 3458A test second A3 – TiN’s 3458A 10V test with LTZ1000 A9 and good ADC
TiN’s 3458A test second A3 – TiN’s 3458A 0V test with LTZ1000 A9 and good ADC
TiN’s comparison DMM, Keithley 2001 vs Keithley 2002 vs HP3458A – Three bench DMMs comparison log on single output HP 3245A 10VDC source
TiN’s 3458A test second A3 + A9 LTZ1000CH – TiN’s 3458A test with K2001 sampling xDevs.com KX LTZ-module output.
KX LTZ1000 voltage reference tests
TiN’s 3458A test KX #1 LTZ1000ACH – 3458A test with LTZ module, K2400 source 100mA 15V.
TiN’s 3458A test KX #1 LTZ1000ACH, Temp-controlled – 3458A test with LTZ module, Battery powered, +24 to +50C
TiN’s 3458A test KX #1 LTZ1000ACH, Temp-controlled, Retry 2 – 3458A test with LTZ module, Battery powered, +24 to +50C
TiN’s 3458A test KX #2 LTZ1000CH, Temp-controlled – 3458A test with second LTZ module, 12K/1K temp setting, Battery powered, +24C to +34C
TiN’s 3458A test KX #2 LTZ1000CH, Temp-controlled, Retry 2 – 3458A test with second LTZ module, 12K/1K temp setting, Battery powered, +24C to +34C
TiN’s 3458A test KX #2 LTZ1000CH, Temp-controlled, Retry 3 – 3458A test with second LTZ module, separate heater, 4.7nF over U5.2-U5.6
TiN’s 3458A test KX #2 LTZ1000CH, Temp-controlled, Retry 4 – 3458A test with second LTZ module, Batt 12.4V K2400, +24C to +50C RAMP
TiN’s 3458A test KX #3 LTZ1000ACH, Temp-controlled – 3458A test with third LTZ module, 13K/1K temp setting, LT1097, Battery powered, +24C to +45C
TiN’s 3458A test KX #3 LTZ1000ACH, Temp-controlled, Retry 2 – 3458A test with third LTZ module, 13K/1K temp setting, LT1097, Battery powered, 10R R5.2->R6.2 +24C to +45C
KX WW vs KX3 and KX1 – 3458A + 2×2002 as DMMs, LTZ1000CH-6
KX WW vs KX3 and KX1 – 3458A + 2×2002 as DMMs, LTZ1000CH-7
KX WW vs KX3 and HP, trimmed pins – 3458A + 2002 as DMM, LTZ1000CH-7 trimmed, HP +23.40C
KX WW vs KX3 and HP, trimmed pins, Andreas Mods – 3458A + 2002 as DMM, LTZ1000CH-7 trimmed, mod, HP +23.40C
KX WW vs KX3 and KX1 – 3458A + 2×2002 as DMMs, LTZ1000CH-8
KX WW vs KX3 and KX1 – 3458A + 2×2002 as DMMs, LTZ1000CH-9 (3458A ebay)
KX Box LTZ test, 3458A, ambient – 3458A test with metal LTZ can, no temperature control
EDC MV106 10V test, 2002, ambient – 2002 test with EDC MV106 +10V, no temperature control
Volt XFER, MM A9 initial measurements – Start of testing for transfer
Volt XFER, MM A9 -> KX LTZ module 7.1365V – Transfer voltage ratio from MM-A9 to KX-Module LTZ
Volt XFER, MM A9 -> KX LTZ module 7.1297V – Transfer voltage ratio from MM-A9 to KX-Module LTZ
Volt XFER, MM A9 -> KX LTZ module 7.13V – Transfer voltage ratio from MM-A9 to KX-Module LTZ
Volt XFER, MM A9 -> Eppley Cell 1.018V – Transfer voltage ratio from MM-A9 to Eppley CELL
Volt XFER, MM A9 -> EDC MV106 after cal – Transfer voltage ratio from MM-A9 to EDC MV106
Volt XFER, MM A9 -> HP 3245A after cal – Transfer voltage ratio from MM-A9 to HP 3245A
3245A test June 2016 – aircon new room night
3245A test July 2016 – ambient, 3458 ACAL each 0.5C
3245A 10.00005V test August 2016 – ambient, 3458 ACAL each 1.1C
3245A 2V test July 2016 – ambient, 2V, 3458 ACAL each 0.5C
3245A 20V test July 2016 – ambient, 20V (2V 1:10), 3458 ACAL each 0.5C
3245A 20uV test July 2016 – ambient, 20uV , 3458 ACAL each 0.5C
3245A 200uV test July 2016 – ambient, 200uV , 3458 ACAL each 0.5C
Volt XFER, MM A9 repeat measurements – Retest with Guard LO -> Guard open
Volt XFER, MM A9 2nd temperature ramp – Final check on temperature ramp 23.4->50->23.4 C
Volt XFER, Time 9823 10V output, open – Initial check on 10V output of Time9823, 20V Range, BNC cable long
Volt ZFER, MM A9 3rd retest – Third check on A9 in May.
Metal LTZ test – Powered by +15.0000V from Time9823, ambient AC. Copper wires to 3458A, NPLC200
HP 11177B 10VDC test, ambient – Powered +29.3 from K2400, -15V from K2304. CAT5 cable to 3458A, NPLC200, ACAL each 0.5c
AD584 10.0 VDC test, ambient – Powered +15.0 from K2400, CAT5 cable to 3458A, NPLC200, ACAL each 0.5c
AD584 7.50 VDC test, ambient – Powered +15.0 from K2400, CAT5 cable to 3458A, NPLC200, ACAL each 0.5c
AD584 5.00 VDC test, ambient – Powered +15.0 from K2400, CAT5 cable to 3458A, NPLC200, ACAL each 0.5c
AD584 2.50 VDC test, ambient – Powered +15.0 from K2400, CAT5 cable to 3458A, NPLC200, ACAL each 0.5c
Time MFC source 10V – 3458A + 2002L + 2002N
Time MFC comparison for K2000 – 3458A + 2002L + 2000 after 10V cal.
Time MFC source 200uV – comparison of 3458A and K182M on 200µVDC
Resistor measurements
VPG VHA518 1.000MΩ – 4W, NPLC200, 3458A, ambient temperature
PRC matched set, 1.000MΩ – 4W, NPLC200, 3458A, ambient temperature
TC: PRC matched set, 1.000MΩ – 4W, NPLC200, 3458A, 50°C to 20°C ramp, 1°C/step
Time 9823 MFC, 10Ω output at 3458A – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 100Ω output at 3458A – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 1KΩ output at 3458A – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 10KΩ output at 3458A – 4W, NPLC100, 100K samples from 3458A, ambient temp
Time 9823 MFC, 10KΩ output at 3458A test2 – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 100KΩ output at 3458A – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 1MΩ output at 3458A – 4W, NPLC100, 3458A, ambient temp
Time 9823 MFC, 10MΩ output at 3458A – 4W, NPLC100, 3458A, ambient temp
Wirewound Vishay black 20K 0.5% – 4W, NPLC100, OCOMP ON, 5 sec delay, 3458A, ambient
Parallel 2×40.96K S102 VPG – - 4W, NPLC100, OCOMP ON, 5 sec delay, 3458A, ambient
VPG VHP 40K from 3458A A1 – - 4W, NPLC100, OCOMP ON, 5 sec delay, 3458A, ambient
VPG 10K from 3458A A1 – 10K R310 from 3458A A1 PCB
xDevs.com Resistance box
1MEG with triax connectors – VPG 1MEG
1MEG with regular banana alligator connectors – VPG 1MEG
100 ohm from Fluke 720 decade – 100 ohm from 10pcs 998R
100 ohm Guildline 9330 – 100 ohm Guildline 9330 resistor
10K ohm VHP202ZT in Guildline 9330 package – 10K VHP test OCOMP/5s
120 ohm VPG VHP202ZT 0.05% – 120 VPG hermetic foil
1.9k – 1900 ohm VHP101 with PMO
95k – 95K ohm VHP101 with PMO | 3458A
95k – 95K ohm VHP101 with PMO | 2002 U1
100k – 100K VHA518
Current tests
Time MFC source 80µADC – 3458A + 2002L + 2002N
Time MFC source 1mADC – 3458A + 2002L + 2002N
Time MFC source 1mADC with K2000 – 3458A + 2002L + 2000
Time MFC source 10mADC with K2000 – 3 DMMs on 10mA same loop
Time MFC source 100mADC with K2000 – 3 DMMs on 100mA same loop
TIme MFC source 10ADC with LEM UltraStab 600S – ZFCT test with 3458A and VPG CSNG 2.5Ohm resistor
TIme MFC source 1ADC with LEM UltraStab 600S – ZFCT test with 3458A and VPG CSNG 2.5Ohm resistor
HP 3245A – HP 3245A DCI 10mA into 3458A ACAL
HP 3245A – HP 3245A DCI 1mA into 3458A ACAL
Low current measurements
Texas Instruments tools
Texas Instruments TINA-TI Free SPICE-Based Analog Simulation Program
TPS25910 20V, 5A, 30mΩ eFuse with Adjustable +/-15% Accurate Current Limit TINA-TI Reference Design