Novatech Bitronics M87X Series - Self-Test Modes

ML0021 August 15, 2018
31 Copyright 2018 Bitronics, LLC
3.1.2 Self-Test Modes
The M87x has several self-tests built in to assure that the instrument is performing accurately. Refer to the appropriate
protocol manual for details on how to retrieve the self-test information. The following table lists possible faults that would be
detected by the self-tests, how the fault is indicated, the effects of the fault and any necessary corrective actions.
Self-Test Bits
Bit # Description Hardware Effect Default Value
0(LSB)
Factory gain calibration of Analog-Digital Signal
Processor Module checksum error.
A10 EEProm
Unit will continue to function using
default values, at reduced accuracy.
A/D Gain = 1
1
Factory offset calibration of Analog-Digital Signal
Processor Module checksum error.
A10 EEProm
Unit will continue to function using
default values, at reduced accuracy.
A/D Offset = 0
2
Factory gain calibration of Signal Input Module
checksum error.
S1x EEProm
Unit will continue to function using
default values, at reduced accuracy.
CT/VT Gain = 1
3
Factory offset calibration of Signal Input Module
checksum error.
S1x EEProm
Unit will continue to function using
default values, at reduced accuracy.
CT/VT Offset = 0
4
Factory phase calibration of Signal Input Module
checksum error.
S1x EEProm
Unit will continue to function using
default values, at reduced accuracy.
CT/VT Phase = 0
5
Factory defined internal ratios of Signal Input Module
checksum error. (Type of Signal Input Module)
S1x EEProm
Unit will continue to function.
Assumes -S10 Signal Input Module
Volts Ratio = 60 :1
Amps Ratio = 14.136 :1
6
User defined external transformer ratio checksum
error.
S1x EEProm
Unit will continue to function using
default values (i.e. w/o user ratios).
User CT = 5:5, VT = 1:1
7 User gain correction values checksum error. S1x EEProm
Unit will continue to function using
default values (i.e. w/o user gain).
User Gain = 1
8 User phase correction values checksum error. S1x EEProm
Unit will continue to function using
default values (i.e. w/o user phase).
User Phase = 0
9
Factory defined board ID for Analog-Digital Signal
Processor Module checksum error.
A10 EEProm
Assumes default Analog-Digital
Signal Processor Module.
Module A10
10
Factory defined board ID for Signal Input Module
checksum error.
S1x EEProm
Assumes default Signal Input
Module
.
Module -S10
11
User defined denominators for TDD measurement
checksum error.
S1x EEProm Assumes default TDD Denominator.
TDD Denom = 5A
Secondary
12 DSP program integrity checksum error. A1x DSP Ram Host trips watchdog, unit reboots.
13 DSP stack overflow. A1x DSP Ram
Host trips watchdog, unit reboots
.
14 Invalid or missing Amp and/or Voltage Scale Factor. H1x Flash File Protocol will use default Scale Factor Scale Factor = 1:1
15 Protocol configuration invalid. H1x Flash File
M87x uses default protocol
configuration
M87x register set