Caution: These instruments can produce or measure lethal voltages at their terminals. Testing should
only be performed by qualified technicians
| Error code | Definition |
|---|
| Fatal System errors |
| 9000 | System Kernel Fault |
| 9001 | Run Time System Error |
| 9002 | Unexpected Exception |
| 9005 | Serial Interface Fault |
| 9099 | Undefined Fatal Error |
| |
| List of Execution Errors |
| 1000 | No Execution Error |
| 1001 | No Test in Cal Mode |
| 1002 | Resume test not allowed |
| 1003 | Cal Switch disabled |
| 1004 | Cal Mode not enabled |
| 1005 | Set nominal not allowed |
| 1006 | Invalid range/function |
| 1007 | Invalid Numeric Data |
| 1008 | No DCPOS Ref value |
| 1009 | No DCNEG Ref value |
| 1010 | No DCRMS Ref value |
| 1011 | No Cal in Millivolt Mode |
| 1012 | No Millivolt in Cal Mode |
| 1013 | No Millivolt Gain value |
| 1014 | mV Option not fitted |
| |
| |
| Device-Dependent Messages: Normal and Calibration Operations |
| Normal Operation |
| 2000 | No Device Error in List |
| 2006 | Invalid Calstore Read |
| 2009 | Invalid Serial Data |
| 2010 | Corrupt Datarec Value |
| 2011 | DCPOS Invalid |
| 2012 | DCNEG Invalid |
| 2013 | DCPOS!DCNEG Mismatch |
| 2015 | Spot Frequency Invalid |
| 2016 | mV Gain Error |
| |
| Calibration Invalldltles |
| 2001 | Invalid Gain Cal |
| 2002 | Invalid HF Trim Cal |
| 2003 | Invalid Flatness Cal |
| 2004 | Invalid Linearity Cal |
| 2005 | Invalid Frequency Cal |
| 2007 | Invalid Calstore Write |
| 2008 | Invalid Cal Arithmetic |
| 2014 | Spot Cal Table Full |
| |
| |
| |
| Serial Loop Initialization |
| 3028 | Chip Test AC Pre-amp |
| 3029 | Chip Test AC RMS Control |
| 3030 | Chip Test A-to-D DAC |
| 3031 | Chip Test A-to-D Switch |
| 3032 | Chip Test Avto-D Tester |
| 3033 | Serial Loop Failure |
| |
| Calibration Illegalities |
| 3001 | Illegal Cal Exercise |
| 3002 | Illegal Special Cal Step |
| 3003 | Illegal Cal Update |
| 3004 | Illegal Calstore Access |
| 3005 | Illegal Calstore Clear |
| 3006 | Illegal Calstore Func |
| 3007 | Illegal Calstore Range |
| 3008 | Illegal Calstore Length |
| 3009 | Illegal Clock Destinatn |
| 3010 | Illegal Clock Reading |
| 3011 | Illegal Clock Setting |
| 3012 | Illegal Clock Access |
| 3013 | Illegal Measure Phase |
| 3014 | Illegal Scale Index |
| 3015 | Illegal Flatness Value |
| 3016 | Illegal Linearity Value |
| 3017 | Illegal HF Correction |
| 3018 | Illegal Gain Correction |
| 3024 | Illegal Test Stage |
| 3025 | Illegal Test Store |
| 3026 | Illegal Test Polarity |
| 3027 | Illegal Engine Op-Code |
| 3034 | Illegal Operation |
| 3035 | Illegal Parameter |
| |
| Device-Dependent Messages: Selftest Operations Error Messages |
| Preliminary |
| 4000 | Stuck Key. |
| 4001 | Dig Power Supplies |
| 4002 | Battery Voltage |
| |
| Memory |
| 4003 | ROM Bitsums. |
| 4004 | RAM ReadIWrite. |
| 4005 | CAL Integrity. |
| |
| Digital Communication |
| 4006 | Serial Loop Config. |
| |
| Analog-to-Dlgltal Conversion |
| 4007 | A-to-D Zero. |
| 4008 | A-to-D +15V Supply. |
| 4009 | A-to-D -15V Supply. |
| 4010 | A-to-D Gain. |
| 4011 | A-to-D Linearity +. |
| 4012 | A-to-D Linearity -. |
| 4013 | A-to-D +l1V Supply. |
| 4014 | A-to-D -19V Supply. |
| |
| High Accuracy ACV Conditioning |
| 4015 | AC Preamp Xl Zero. |
| 4016 | AC Preamp X3 Zero. |
| 4017 | AC 1 V Gain, DC Pos. |
| 4018 | AC IV Gain, DC Neg. |
| 4019 | AC Preamp X3 Gain. |
| 4021 | AC 100V Attenuator. |
| 4022 | AC 1kV Attenuator. |
| |
| Frequency and Overload |
| 4023 | AC Freq Counter. |
| 4024 | AC Overload Detect. |
| 4025 | AC Overload Switch. |
| |
| High Accuracy RMS Conversion |
| 4026 | AC HF Path Detect. |
| 4027 | AC RMS Converter. |
| 4028 | AC RMS Track. |
| 4029 | AC RMS Hold. |
| 4030 | AC Quasi-Sine. |
| 4031 | AC Measurement. |
| 4032 | Not Used. |
| 4033 | AC 10Hz Filter. |
| 4034 | Not Used. |
| 4035 | AC RMS Linearity. |
| |
| Wide Band O-A Conversion |
| 4036 | WB Power. |
| 4037 | WB DAC +ve Zero. |
| 4038 | WB DAC -ve Zero. |
| 4039 | WB DAC +ve Full Scl. |
| 4040 | WB DAC -ve Full Scl. |
| 4041 | WB DAC +3.5V. |
| 4042 | WB DAC -3.5V. |
| |
| Wide Band Chopper Action |
| 4043 | WB DC Switch -ve. |
| 4044 | WB DC Switch -ve. |
| |
| Wide Band Thermal Conversion |
| 4045 | WB TTU DC 3.5V. |
| 4046 | WB TTU DC l.OV. |
| 4047 | WB TTU DC OV. |
| 4048 | WB TTU AC OV. |
| 4049 | Not Used. |
| 4050 | WB Cal Validity. |
Wavetek/Datron 4920 AC Measurement Standard
The 4920 from Wavetek/Datron is a very high performance, bench top alternating voltage measurement standard. It is a direct reading, fully automated measurement instrument with low uncertainties. It covers a range from 90mV to 1100V and a frequency range of 10Hz to 1MHz. A milivolt amplifier option is available for the 4920 to extend voltage measurement down to 900uV. A wideband voltage option is also available for the 4920 with coverage to 50MHz.
Common Failures
- Misapplication of voltage - The 4920 can be damaged when voltages greater than 3.5V RMS are applied to the wideband inputs or when greater than 30V is applied to the mV input.
- Age - Very old instruments can suffer from age related failures caused by normal deterioration of components and assemblies over time.
Test Instructions
These instruments can produce or measure lethal voltages at their terminals. Testing should only be performed by qualified technicians.
Any failure or operational deficiency information available allows us to provide the best service. Please include any information available about failures and what function the instrument was in prior to failure.
Test Steps
- If the instrument is smoking or has a bad smell coming from it turn it off immediately and contact us for further instruction.
- Power up the 4920. The instrument runs through the full self test automatically. If a failure occurs, note the error number/description and contact us. There are often multiple errors. Report as many as you reasonably can.
- For any functional or calibration errors not detected by the self test and cal operations, contact us for repair.
