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Chapter 3 – Specifications

Standard Current Models: Range/Resolution/Test Current/Failsafe Current

Table 1.A – Standard Current Models

Range #

Range

Value

2Ω

20Ω

200Ω

2kΩ

20kΩ

200kΩ

2MΩ

20MΩ

200MΩ

Resolution

100μΩ

1mΩ

10mΩ

100mΩ

1Ω

10Ω

100Ω

1kΩ

10kΩ

Test

Current

10mA

1mA

100μA

10μA

1μA

100nA

10nA

1nA

Fail-Safe

Current

[1]

16mA

1.8mA

180μA

18μA

1.8μA

180nA

18nA

1.8nA

[1] Max Value. The actual measured level is provided on the certificate of calibration.

KRC Reduced Current Models: Range/Resolution/Test Current/Failsafe Current

Table 2.B - Reduced Current Models

Range #

Range

Value

2Ω

20Ω

200Ω

2kΩ

20kΩ

200kΩ

2MΩ

Resolution

100μΩ

1mΩ

10mΩ

100mΩ

1Ω

10Ω

100Ω

Test

Current

5mA

500μA

50μA

5μA

500nA

50nA

Fail-Safe

Current

[1]

8mA

1.8mA

180μA

18μA

1.8μA

180nA

[1] Max Value. The actual measured level is provided on the certificate of calibration.

Содержание Alpha 4314 KRC

Страница 1: ...Alpha 4314 Series Standard STD and Reduced Current KRC Models Digital Igniter Tester Operations Manual Valhalla Scientific Inc 12127 Kirkham Rd Poway CA 92064 www valhallascientific com...

Страница 2: ...his instrument is stated on your invoice and packing list Please refer to these to determine appropriate warranty dates We will repair the instrument during the warranty period provided it is returned...

Страница 3: ...perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this pro...

Страница 4: ...lsafe Current 3 Accuracy 4 Temperature 4 General Specifications 4 Physical Specifications 4 Chapter 4 Optional Equipment 5 Available Options 5 Option A Battery Charger 5 Replacement Batteries 5 Option...

Страница 5: ...ns 9 Interpreting the Display 9 Failsafe Operation 9 Battery Monitoring Circuitry 10 Range Indicator LEDs 10 Chapter 6 Troubleshooting 11 Localizing the Problem 11 Component Replacement 11 Chapter 7 R...

Страница 6: ...on Results 15 Scale and Linearity Check 15 Zero Check 15 Battery Replacement Instructions 15 Chapter 8 Interface Operations 16 BCD Interface 16 Safety Isolated RS 232 Interface 17 Connecting the Alpha...

Страница 7: ...Instruments with special feature are also available Please check any addendums that may apply to special Alpha 4314 versions Standard feature of the Alpha 4314 is a battery monitoring circuit that al...

Страница 8: ...y not be powered directly from the AC adapter The Alpha 4314 must be turned off and have the adapter connected in order to charge the batteries The battery pack may power the Alpha 4314 for up to 10 h...

Страница 9: ...16mA 16mA 1 8mA 180 A 18 A 1 8 A 180nA 18nA 1 8nA 1 Max Value The actual measured level is provided on the certificate of calibration KRC Reduced Current Models Range Resolution Test Current Failsafe...

Страница 10: ...ble for 200k range and above Operating Temperature Range 0 C to 50 C Storage Temperature Range 10 C to 70 C General Specifications Display Type 4 digits Light Emitting Diodes LED 19999 Overload Indica...

Страница 11: ...test leads battery charger etc Option R4 Rack Mount Adapter Option R4 is an adapter tray that allows the Alpha 4314 to be installed in a standard 19 equipment rack Test Leads Option K 4 Wire Kelvin Le...

Страница 12: ...ble terminated in dual banana plugs at both ends Option KCS Kelvin Clips Option KCS is the gold plated Kelvin clips used on the Option K cable These clips may be used when making custom cables or when...

Страница 13: ...d on the right hand side of the front panel The pushbutton for the lowest resistance range is nearest to the POWER switch LED indicators will point out the range and failsafe current selected Rear Pan...

Страница 14: ...esistance measurement of the load independent of the resistance of the current carrying leads Figure 1 Error Sources in Resistance Measurements Figure 1 illustrates how the 4 wire principle is used to...

Страница 15: ...enever the terminals are open by using a 4 wire Kelvin type lead set or by shorting the VHI and IHI terminals together The display should indicate a stable reading when the test leads are securely att...

Страница 16: ...at this point A Red Battery Status LED indicates that battery is low and that readings should not be trusted An overnight recharge should be performed before using the Alpha 4314 for critical testing...

Страница 17: ...so one of the first things that should be checked As it is not possible to anticipate all failure modes of the Alpha 4314 servicing personnel should become familiar with this section to gain a complet...

Страница 18: ...he Precision Resistors necessary for the calibration of the Alpha 4314 varies based on the installed ranges Precision Resistors 1 0 01 Accuracy 1 0 005 Accuracy 2 Range 10 0 005 Accuracy 20 Range 100...

Страница 19: ...e range is being calibrated 11 Wait until D200 turns off 12 Now unit should display 15000 2 13 Disconnect leads VOLTAGE SENSE ADJUSTMENTS for KRC REDUCED CURRENT MODELS Connection Apply voltage at Vol...

Страница 20: ...al Certificate Sheet 9 If the 20 range is too low select R27 using the RC Box IMPORTANT If it is necessary to perform step 4 9 go back and forth between the 20 and 200 range until both are in spec FAI...

Страница 21: ...inearity Check Apply to each range resister values equal to 50 of range 5 of range 0 5 of range and 0 05 of range All values should be within the tolerance specified in Chapter 3 Zero Check 1 Apply a...

Страница 22: ...ual Pin Number Data 1 1 2 2 3 4 4 8 6 10 7 20 8 40 9 80 11 100 12 200 13 400 14 800 16 1000 17 2000 18 4000 19 8000 21 10000 22 40 20000 Over Range 26 5VDC Supply 50 0 VDC Common 35 End of Conversion...

Страница 23: ...0 baud Parity bit none Data bit 8 bits Stop bit 1 stop bit Data flow control none Notes for RS232 installation The Alpha 4314 is a DCE Data Channel Equipment device with a 9 pin D type shell RS232 con...

Страница 24: ...and queries must be typed as specified The Alpha 4314 is sensitive to the case of command characters Specifically the device uses the Camel Case DETAILS OF COMMAND REFERENCE Each command in this chap...

Страница 25: ...nge 123 45 Example for 2k Range 1 2345k Example for 20k Range 12 345k Example for 200k Range 123 45k Example for 2M Range 1 2345M Example for 20M Range 12 345M Example for 200M Range 123 45M LogOn0 CO...

Страница 26: ...00M Range 123450000 LogOn2 COMMAND Turns on continues reading mode synonymous with Screen RangeV Note if the devices is already Logging the LogOn2 command will return Invalid Command Syntax LogOn2 crl...

Страница 27: ...reading formatted in ohms with multiplier No leading zeros Syntax Ohms crlf Returns Display data in Ohms with multiplier Example for a 1 1 ohm reading on 2 Range 1 1000 20 Range 1 100 200 Range 1 10 2...

Страница 28: ...ange 200k 200k Ohms Range 2M 2M Ohms Range 20M 20M Ohms Range 200M 200M Ohms Range Reset COMMAND Executes a soft reset of the system Syntax Reset crlf Response crlf Screen QUERY Responds with the scre...

Страница 29: ...nsiderations for special Alpha 4314 versions Please refer to any applicable material before attempting to operate your Model Alpha 4314 If you have a digital copy of this manual all available addendum...

Страница 30: ...lhallascientific com For information on our line of products please visit or web site at www valhallascientific com To reach our sales department Phone 858 457 5576 Fax 858 457 0127 E mail sales valha...

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