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Section 6

OM6622T-A-00

30 January

2018

6-5

6.2.4.

Check Procedure

1.

Use  the  “Test  Sequence”  function  of  the  “Configuration”  menu  of  the  BridgeWorks
Data Acquisition Software to measure the resistance ratio of each resistor pair with the
corresponding excitation current and reversal rate listed below.  See the BridgeWorks
Software  User’s  Manual  for  the  particulars  of  running  a  test  sequence.    These
measurements can also be made manually.  If they are made manually, allow sufficient
time  for  the  measurement  to  settle  (5-10  minutes)  and  ensure  that  all  measurements
made that are related to a given closure are within 4 hours of each other.

Meas.
No.

R

X

Resistor

R

s

Resistor

Excitation
Current

Reversal
Rate

Meas.
Mode

Closure
Method

Tests 1 – 5 for 6622T and 6622T-XP bridges.

1

1



1



100 mA

15 s

Normal

Interchange

2

1



1



100 mA

15 s

Normal

3

10



1



10 mA

15 s

Normal

Ladder

4

100



10



3.16 mA

15 s

Normal

5

100



1



1.0 mA

15 s

Normal

2. For the resistor pair, calculate and report the interchange closure error. For example, if

the Rx:Rs ratio of the first measurement is R

a

and the Rx:Rs ratio of the second

measurement, where the two resistors are exchanged with one another, is R

b

, then the

interchange error e

i

in ppm of the nominal ratio is:

e

i

= (1/2) x



R

a

x R

b

-1



x 10

6

3. The maximum allowable interchange closure errors (ppm) for the resistor pairs are

±100 ppm.

4. For the 100:1 ladder up closure errors, the 100:1 ratio must agree to within the

specification of the nominal ratio for either directly measuring the 100:1 ratio, or
calculating the ratio from the product of the 100:10 ratio and the 10:1 ratio, as
follows:

e

i

= (1/3) x



R

a

- R

b

x R

c



/100 x 10

6

Where:

R

a

is the 100:1 ratio

R

b

is the 100:10 ratio

R

c

is the 10:1 ratio

5. The maximum allowable ladder up errors (ppm) for the resistor sets are ±100 ppm.

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Содержание 6622T Series

Страница 1: ...ual are proprietary to Guildline Instruments Limited They are to be used only as a guide to the operation and maintenance of the equipment with which this manual was issued and may not be duplicated o...

Страница 2: ......

Страница 3: ...Bench Model Only 2 6 2 3 3 Guard Terminal Bench Model Only 2 6 2 3 4 Circuit Common Terminal Bench Model Only 2 6 2 3 5 Power 2 6 2 3 6 Display 2 7 2 3 7 Numeric Keypad 2 7 2 3 8 Special Keys 2 7 2 3...

Страница 4: ...12 4 6 1 1 Measure MENU Fn 1 MAIN Page 1 of 3 4 13 4 6 1 2 Measure MENU Fn 1 MAIN Page 2 of 3 4 14 4 6 1 3 Measure MENU Fn 1 MAIN Page 3 of 3 4 15 4 6 2 Setup MENU Fn 1 Setup_MAIN 4 16 4 6 3 Profiles...

Страница 5: ...Messages 6 1 6 1 2 Model 6622T Setup Warnings 6 3 6 1 3 Bridge Coefficients 6 3 6 2 QUICK RATIO CHECK 6 3 6 2 1 Purpose 6 4 6 2 2 Equipment Required 6 4 6 2 3 Set Up 6 4 6 2 4 Check Procedure 6 5 7 R...

Страница 6: ...OM6622T A 00 30 January 2018 v 7 5 MODEL 6622T PROGRAMMING COMMAND SUMMARY 7 8 8 APPENDICES 8 1 8 1 GENERAL SPECIFICATIONS continued 8 1 8 2 RESISTANCE MEASUREMENT SPECIFICATION 8 2...

Страница 7: ...CE MEASUREMENT RESPONSE VERSUS TEST SAMPLE 3 1 FIGURE 3 2 REAR PANEL CONNECTIONS NORMAL OHM MODE 3 2 FIGURE 3 3 REAR PANEL CONNECTIONS LOW OHM MODE WITH 6623 3 8 FIGURE 3 4 REAR PANEL CONNECTIONS LOW...

Страница 8: ...OM6622T A 00 30 January 2018 vii...

Страница 9: ...300 RECOMMENDED LOW OHM MODE TEST SETUP 3 7 TABLE 3 4 RECOMMENDED TEMPERATURE MEASUREMENT TEST SETUP 3 10 TABLE 6 1 MODEL 6622T ERROR MESSAGES 6 2 TABLE 7 1 FACTORY SETTING GPIB 7 2 TABLE 7 2 IEEE 488...

Страница 10: ...OM6622T A 00 30 January 2018 ix...

Страница 11: ...e software Once the computer system is installed and connected to the IEEE 488 Interface of the 6622T Thermometry Bridge full software control of the bridge is possible The front panel controls and in...

Страница 12: ...Research Council of Canada1 Remote access to the embedded microprocessor controller through a simple control language command set and GPIB communication interface allows the 6622T to fully exploit the...

Страница 13: ...t balance the ratio of the two currents Ix and Is flowing in the two windings is the same as the ratio of the turns set for each winding Nx and Ns Complete electrical isolation between circuit current...

Страница 14: ...OMMUNICATION CLK CLK Do Di FIBRE OPTIC INTERFACE Do Di Do Di C1 1 P Is Is PWR Ix FIBRE OPTIC INTERFACE Ix PWR Nx 0 to 8747 REAL TURNS ONLY 2 C P2 Rx Tx Rx Tx Rx C2 P2 P1 C1 S Rs Ns 648 TURNS AUTORANGI...

Страница 15: ...Low Ohm mode a high current range extender such as the model 6623A is used to improve the accuracy and allow for measurements below the normal Ohm range 1 4 1 2 Normal Ohm Measurement Mode This mode a...

Страница 16: ...Section 1 OM6622T A 00 30 January 2018 1 6...

Страница 17: ...e correct line voltage and the correct fuse must be installed before power is applied to the instrument The 6622T has a voltage selection which must be set correctly The settings available are 100 V 1...

Страница 18: ...IME DELAY TYPE 100 V 120 V 220 V 240 V 2 A 250 V T 2 A 250 V T 1 A 250 V T 1 A 250 V T Table 2 1 Fuse Ratings 100V 120V 220V 240V 100V 120V 220V 240V EXPOSE LINE SELECTOR SLIDER REMOVE SELECTOR 120V S...

Страница 19: ...not been found then run the Rescan For Bridge utility in the File menu to locate it Note that you will also need to run the Rescan For Bridge utility if the bridge was turned on after BridgeWorks was...

Страница 20: ...o start the measurement The 6622T bridge will begin by showing the nominal value of the resistor to be measured and then continue to go through a number of rough measurement cycles until a full resolu...

Страница 21: ...ront View Bench Rack 2 3 1 Standard Resistor Input Terminals Bench Model Only The standard resistor input terminals consist of 4 low thermal binding posts The binding posts have the Rs label above the...

Страница 22: ...nsists of a four way white binding post The guard is an active circuit referenced to the signal low C1 side of the four terminal Rx resistor This terminal is located on the front panel for bench top m...

Страница 23: ...r keys are labeled as follow LEFT ARROW UP ARROW DOWN ARROW and RIGHT ARROW 2 3 8 2 Function Keys The four unlabelled keys located below the display are the function keys Their functionality depends o...

Страница 24: ...Figure 2 3 6622T Rear View Bench Rack 2 4 1 IEEE 488 Interface The IEEE 488 interface consists of the standard IEEE 488 interface connector The IEEE 488 interface provides the means for the computer s...

Страница 25: ...rmal binding posts The binding posts have the Rx label inside the group of four posts The posts are labeled clockwise from bottom left to right C1 P1 P2 and C2 These posts provide direct connection fo...

Страница 26: ...green binding post The ground terminal is bonded to the chassis of the 6622T Series and to power ground of the line input connector 2 4 8 Extender Connector The Extender connector is a 6 pin circular...

Страница 27: ...622T bridge through the terminal of the system computer is provided in the BridgeWorks Software User s Manual A typical example of a resistance measurement response versus test sample is illustrated i...

Страница 28: ...cations are based on use of shielded wire connections throughout with shields connected to the GUARD terminal Use of SCW cable from Guildline is most recommended NOTE In this as in all measurements op...

Страница 29: ...esistor serial number under serial No RS line Select the down arrow key to highlight the next line on the display Enter the reversal rate for the measurement Select the down arrow key to highlight the...

Страница 30: ...6 20 10 1 k 0 316 31 6 60 100 10 31 6 31 6 20 100 100 10 10 20 100 1 k 1 10 40 100 10 k 0 1 10 90 1 k 100 10 10 40 1 k 1 k 3 16 3 16 40 1 k 10 k 0 316 3 16 60 1 k 100 k 0 032 3 2 90 10 k 1 k 3 16 3 1...

Страница 31: ...an be done by pressing the softkey under displayed range extender model until the displayed value is changed to the desired model The 6622 A family of DCC bridges can work with the 6623A Series or the...

Страница 32: ...bridge is carrying out a measurement at 0 zero current Now enable the current output of the power supply Remember to always start the bridge measurement before the high current output of the current...

Страница 33: ...0 1 3A 60 Limit of x 20 3A Range 1000 10 0 8 8 20 1 3A 60 Limit of Voltage Compliance 1 0 001 15 15 200 1 15A 60 Limit of x 200 15A Range 1 0 005 15 75 200 1 15A 60 Limit of x 200 15A Range 1 0 01 10...

Страница 34: ...Section 3 OM6622T A 00 30 January 2018 3 8 Figure 3 3 Rear Panel Connections Low Ohm Mode with 6623...

Страница 35: ...Section 3 OM6622T A 00 30 January 2018 3 9 Figure 3 4 Rear Panel Connections Low Ohm Mode with 6623A 300...

Страница 36: ...p 4 Ref P R T Itest 2 mAmps Imax mAmps Reversal Rate sec Comment 1 Update 2 Quick Measure 1 25 2 4 100 20 Limited by 10mW max in standard 1 100 1 100 20 Limited by 10mW max in standard 10 25 2 6 32 31...

Страница 37: ...Section 3 OM6622T A 00 30 January 2018 3 11 Figure 3 5 Rear Panel Connections PRT SPRT...

Страница 38: ...Resistance Measurement System Before using the 6622T with the computer ensure that the operation of the software package is well understood The computer controls the system through the IEEE 488 Inter...

Страница 39: ...ded in the form of the up arrow down arrow left arrow and right arrow Four software programmable keys are positioned beneath the display area These keys take on the function as displayed in the displa...

Страница 40: ...Power x2 No Filter Decimation N Average Normal PPM Delta PPM SP Delta SP 0 001ppm 0 01ppm 0 1ppm 1 0ppm 10 0ppm Quick OFF Quick ON GPIB Coef Set Diagnostic P O S T Filter Datum Password Edit OK Addres...

Страница 41: ...2T A 00 30 January 2018 4 3 Figure 4 2 Menu Tree SETUP Resistor Edit OK Normal Low Ohms Low Ohms Edit OK 6623 2A 6623 9923 Custom Edit OK Measure Setup Sofcal Profiles Edit Edit OK Scale 6623A 3A 6623...

Страница 42: ...ction 4 OM6622T A 00 30 January 2018 4 4 Figure 4 3 Menu Tree SETUP Probe Edit OK IPTS 68 ITS 90 IEC 751 Edit OK 6623 2A 6623 9923 Custom Coeff Edit Neg Measure Setup Sofcal Profiles Edit Edit OK Scal...

Страница 43: ...A 00 30 January 2018 4 5 Figure 4 4 Menu Tree MEASURE VIEW Edit Ok Refresh Clear Det Clear Sum Detail Summary Graph Detail Window Graph Previous Next Summary Data Previous Next Summary Refresh Data De...

Страница 44: ...areas and a status line When there are more than four functions for a given menu level a Scrn n N function key will appear Pressing this menu option will display the remaining set of operations availa...

Страница 45: ...played name of the key will be updated to reflect the newly assigned state Example Current key option Option after key press 1 2 Press Button Update 2 Update 4 Update 4 Update 1 If the displayed optio...

Страница 46: ...of the display screen Example Current Screen Example continued Screen after pressing function key Display The alternate value Ohms associated with the function key Display is toggled into the active...

Страница 47: ...present menu level If a header line is displayed the number of selections are restricted to 5 or less If there is no header line then the number of selections can be 6 or less 4 4 4 Base Edit Select M...

Страница 48: ...en type is a selection screen for example the Resistor select menu function the highlighted item will be selected active only when the soft function key Ok is pressed While in an Edit screen function...

Страница 49: ...del configuration and the installed options i e B XP XPS XR XPR HV The REMOTE DISPLAY screen will appear only when the 6622T has been addressed by a remote communication device on the GPIB The only ac...

Страница 50: ...evel pressing the CANCEL key will automatically stop the measurement cycle and cause a return to the Measure off mode There are two other menu sequences that will also turn Measure off automatically 1...

Страница 51: ...s 3 if the current measurement mode is LOW OHMS then the extender ratio will also be displayed on the STATUS LINE Available functions menu page 1 of 3 Function key Fn 1 toggles through the set of avai...

Страница 52: ...ent reversal rate Update 2 sets a screen update rate at the test current reversal rate Update 4 sets a screen update rate at half the test current reversal rate Function key Fn 2 selects twice the rat...

Страница 53: ...s affects Normal Delta and Delta SP display modes only Available resolutions are 0 001 ppm 0 01 ppm 0 1 ppm 1 0 ppm 10 ppm Function key Fn 3 toggles the quick measure mode on Quick ON and off Quick OF...

Страница 54: ...IN Profiles allow the user to save resistor configuration files 15 profiles are available Function key Fn 1 Select allows the selection and deletion of profiles Function key Fn 2 Ok selects the highli...

Страница 55: ...oggles between m Ohms Ohms k Ohms M Ohms 4 6 4 View The View Menu allows the user to view the trace data in graphical and text format The last 500 entries are kept in memory and the individual entries...

Страница 56: ...ious if present scrolls the trace buffer window left Next if present scrolls the trace buffer window right Summary switches to the summary display The Up arrow scrolls the trace buffer left by Up Down...

Страница 57: ...w scrolls to the beginning of the trace buffer The Right Arrow scrolls the end of the buffer and sets the trace in automatic update mode 4 6 4 4 Window Detail Graph Window Size is the number of trace...

Страница 58: ...ect operation using the high current range extender for low value resistance measurements NOTE The measurement mode is affected immediately when the function key is pressed If a measurement is in prog...

Страница 59: ...Current is satisfied then the test is terminated and an error message is displayed The Max Current is the maximum current that can be carried by the STANDARD RESISTOR Rs Note that the highest Test Cur...

Страница 60: ...RESISTOR Rx and can be selected up to 3 Amps with the 6623A 3A and 3000 Amps with the 6623A 3000 With the 6623 the drive current is not entered and is determined by an external power supply The Max R...

Страница 61: ...enables the ITS 90 coefficients for the probe to be viewed and or edited Function Key Fn 3 IEC 751 allows entry to the IEC 751 measurement menu and enables the IEC 751 coefficients for the probe to b...

Страница 62: ...s are removed from the display screen along with the display of Coeff values Function key Fn 3 Coeff selects from the ITS90 set of temperature ranges Range 6 273 15 K to 1234 93 K screen display 0C to...

Страница 63: ...ed the error message Invalid Password will be displayed and the edit session will be terminated 4 6 6 2 1 Edit Neg MENU Fn 2 ITS90 Edit MAIN Neg Coeff Range 259C to 0C a1 b1 c1 c2 c3 Edit Ok Screen 2...

Страница 64: ...use arrow keys to move the highlight to the data line to be changed Modify data and press Ok When Edit is pressed the PASSWORD CHECK display menu is activated Before the selected coefficient can be c...

Страница 65: ...e to be changed Modify data and press Ok 4 6 7 Sofcal MENU Fn 3 MAIN The menu options available through this function allow configuration setup and general modes of operation of the 6622T Three pages...

Страница 66: ...n level of the installed software Function Key Fn 2 Filter allows setting of the filter constants for the AVERAGE and DECIMATION filters Function Key Fn 3 Datum allows setting of reference datum value...

Страница 67: ...4 6 7 1 GPIB MENU Fn 1 Sofcal_MAIN Address function key Fn 1 sets the GPIB address Mode function key Fn 2 selects from the options Talk Listen Talk Only Disabled No GPIB settings will be saved or acte...

Страница 68: ...w a password must be supplied Diagnostic menu selection page 1 of 4 Function Key Fn 1 Monitor selects the monitor menu level and displays the value of the internal channels reported from the servo car...

Страница 69: ...flow and the polarity of the voltage outputs Function key Fn 2 milliamps sets the magnitude of the current output For the current to flow to the Rs and Rx terminals Mode must be set to Normal Ohm The...

Страница 70: ...d from the choice of Slowest Slow Moderate and Fast The servo loop is used for balancing the flux in the core Function key Fn 3 enables or disables the automatic ramping feature for the Current For cu...

Страница 71: ...ed it can be reset to the factory default password by entering this menu and pressing in order Left Arrow Right Arrow Up Arrow Down Arrow ERROR STATUS displays the error bits in hexadecimal notation 0...

Страница 72: ...t for the simple averaging filter 1 2 4 8 16 32 64 and 128 Function key Fn 2 Decimation allows the setting of the decimation filter factor 0 001 through 0 500 4 6 7 6 Datum MENU Fn 3 Sofcal_MAIN The v...

Страница 73: ...ate and time The time is entered in 24 hour format 4 6 7 8 Extender MENU Fn 3 SofcalMENU This allows creation deletion and editing of extenders Existing extenders are selected with UP and DOWN arrows...

Страница 74: ...econds for current The 6622T always sets current to zero 0 and then sets the specified current during state changes turns or polarity For a standard Guildline Product the setting for this stage is 1 s...

Страница 75: ...milliampere correction This is applied when negative current is sent by the 6622T For a standard Guildline product this is 0 ve Gain is used to adjust the current with a milliampere correction The gai...

Страница 76: ...product this is 15 0 A Cascade state is used to select the stage For a standard Guildline product this is 1 Slave state is used to select the stage For a standard Guildline product this is 0 or blank...

Страница 77: ...l 6623A 150 Cascade state is used to select the stage For a standard Guildline product this is 1 Slave state is used to select the stage For a standard Guildline product this is 0 or blank Stage 4 Ram...

Страница 78: ...ndard Guildline product this is 1 Slave state is used to select the stage For a standard Guildline product this is 1 For a Guildline 6623A 3000 the slave count is set to 20 4 6 6 9 PASSWORD MENU Fn 1...

Страница 79: ...ing of up to nine 9 characters can be entered for the password Function key Ok will accept the new password as entered NOTE The factory default password is 6622 If the password has been changed and su...

Страница 80: ...Section 4 OM6622T A 00 30 January 2018 4 42...

Страница 81: ...o ratio accuracy It is recommended that all of these procedures be performed on an annual basis to verify that the 6622T is performing within the manufacturer s specifications relative to its last cal...

Страница 82: ...nning a test sequence These measurements can also be made manually If they are made manually allow sufficient time for the measurement to settle 1 2 hours and ensure that all measurements made that ar...

Страница 83: ...the 100 1 ratio must agree to within the specification of the nominal ratio for either directly measuring the 100 1 ratio or calculating the ratio from the product of the 100 10 ratio and the 10 1 rat...

Страница 84: ...mance of the model 6622T for its recertification 5 2 1 Equipment Required The following equipment is required for this procedure 10 ohm standard resistor stable to 0 01 ppm over a 24 hour period x2 10...

Страница 85: ...User s Manual for the particulars of running a test sequence These measurements can also be made manually If they are made manually allow sufficient time for the measurement to settle 1 2 hours and en...

Страница 86: ...0 1 ratio must agree to within the specification of the nominal ratio for either directly measuring the 100 1 ratio or calculating the ratio from the product of the 100 10 ratio and the 10 1 ratio as...

Страница 87: ...messages either on the front panel display of the 6622T Thermometry Bridge in manual mode or on the computer monitor when using the BridgeWorks Data Acquisition Software The error messages and their c...

Страница 88: ...the BridgeWorks Data Acquisition Software 7 No Serial Number Specified File not saved Rs Serial number left blank in setup put one in 8 Nano Railed Out of Nanovoltmeter range Resistors not wired to R...

Страница 89: ...ernal Values This menu allows full control of the model 6622T Great care should be taken when using these functions Self test not completed 6 1 3 Bridge Coefficients 1 Run the BridgeWorks Data Acquisi...

Страница 90: ...procedures be performed after any corrective maintenance activity to confirm the operation of the 6622T It is recommended that all of these procedures be performed on an annual basis to verify perform...

Страница 91: ...l Interchange 2 1 1 100 mA 15 s Normal 3 10 1 10 mA 15 s Normal Ladder 4 100 10 3 16 mA 15 s Normal 5 100 1 1 0 mA 15 s Normal 2 For the resistor pair calculate and report the interchange closure erro...

Страница 92: ...Section 6 OM6622T A 00 30 January 2018 6 6...

Страница 93: ...y those of the model 6622T may appear to be inactive due to the frequency of communication by the computer system which acts as the GPIB controller 7 1 INTERFACES The model 6622T system has an externa...

Страница 94: ...troller of the model 6622T is the computer system which the user controls through the BridgeWorks Data Acquisition Software 7 2 2 IEEE 488 Responses The reply to any IEEE 488 query command will be a s...

Страница 95: ...ers 1 DAV DATA VALID is used to indicate the condition of availability and validity information on the DIO signal lines 2 NDAC NOT DATA ACCEPTED 3 NRFD NOT READY FOR DATA is used to indicate the condi...

Страница 96: ...a printer for hard copy then Talk Only mode should be selected as the preferred mode of operation 7 2 6 IEEE 488 Electrical Interface The model 6622T meets the subsets of the IEEE 488 interface speci...

Страница 97: ...12 SHIELD Screening on Cable connected to ground 13 DIO5 Data Input Output Line 5 14 DI06 Data Input Output Line 6 15 DIO7 Data Input Output Line 7 16 DIO8 Data Input Output Line 8 17 REN Remote Enab...

Страница 98: ...r If for some reason the controller does not read the responses from its query commands the output buffer will overflow in this case the first data into the buffer will still be valid and the later da...

Страница 99: ...h the 6622T will accept numeric parameters in the range 2 2E 308 through 1 8E308 the useful range of numbers is between 1 0E 8 and 1 0E5 7 4 MODEL 6622T REMOTE AND LOCAL OPERATION The model 6622T can...

Страница 100: ...6622T will remain in the remote with lockout state Remote with lockout is similar to the remote state but restricted The Remote softkey will not return to the local state To return the model 6622T to...

Страница 101: ...MAND COMMENT CLS clear status register ESR query display event status register ESE query display event status enable ESE unsigned set event status enable IDN query display identity of unit OPT query d...

Страница 102: ...t 0 Filter OFF 1 Decimation 2 Simple average MEASure FILTer query display the filter setup MEASure UPDAte rate set the number of screen updates for each measurement cycle rate 0 1 2 type digit 0 1 upd...

Страница 103: ...ltmeter to measure input voltages at the potential terminals 0 OFF 1 ON MEASure VOLT query nanovoltmeter status MEASure QUICk state select the quick measurement state state 0 1 type boolean 0 OFF 1 ON...

Страница 104: ...stor md RS_SN SN RX Rev_Rate Tst_Val Tst_Max set the active resistor measurement configuration mode 0 1 2 type digit 0 normal mode 1 high ohms mode 2 low ohms mode RS nr3 ref resistor value RS_SN stri...

Страница 105: ...le filter 0 1 2 type digit 0 none 1 decimation 2 simple average size unsigned size for decimation sample size for simple average power 0 1 2 type digit 0 power normal X1 1 power X2 CONFigure RESIstor...

Страница 106: ...or serial Rev_rate nr3 test current reversal rate Tst_Val nr3 test current volts Tst_Max nr3 max current Is for ref resistor CONFigure PROBe query display active probe configuration Information respon...

Страница 107: ...size unsigned size for decimation sample size for simple average power 0 1 2 type digit 0 power normal X1 1 power X2 2 power X0 5 CONFigure PROBe DISPlay query display the active probe display setup C...

Страница 108: ...he active probe negative temperature coefficients CONFigure VOLTmeter range zero high ref set the voltmeter calibration coefficients range 0 1 2 3 4 type digit 0 20V range 1 2V range 2 200mV range 3 2...

Страница 109: ...pond to commands with a minimum data set SYSTem VERSion query display the installed software version SYSTem DIAGnostic ROMChecksum query display rom checksum SYSTem DIAGnostic SERialNumber number assi...

Страница 110: ...1k ohm Rs range 4 10k ohm Rs range 5 100k ohm Rs range 6 1M ohm Rs range 7 10M ohm Rs range 8 100M ohm Rs range corr nr3 correction coefficient ppm of ratio uncert nr3 uncertainty ppm of ratio SOFCAL...

Страница 111: ...y adc beta for the nanovolt detector SOFCAL GET Calculate adc beta for the nanovolt detector SOFCAL FREQuency Hz set the line frequency option Hz 011 type digit 0 60 Hz 1 50 Hz SOFCAL DATE query displ...

Страница 112: ...mode setting Highres resolution set the high resolution mode resolution 0 1 type boolean 0 OFF 1 ON HardWareFilter query display the hardware filter status HardWareFilter status set the hardware filt...

Страница 113: ...d query display the speed setting ISSpeed speed set the speed speed 0 1 2 3 type digit 0 reset 1 slow 2 moderate 3 fast OHmmode Query display the ohm mode OHmmode mode set the ohm mode mode 0 1 2 type...

Страница 114: ...Section 7 OM6622T A 00 30 January 2018 7 22...

Страница 115: ...Section 8 OM6622T A 00 30 January 2018 8 1 8 APPENDICES 8 1 GENERAL SPECIFICATIONS continued 6622T Series General Specifications Table 8 1 General Specifications continued...

Страница 116: ...ards For example a 100 UUT could be measured with a 1 10 or 100 reference standard Rs To determine the bridge s contribution to measurement uncertainty simply look at the Rs you are using and go to th...

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