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Maintenance
41
Troubleshooting
Maintenance
Calibration
To maintain high accuracy, the instrument should be calibrated once every year.
Calibration services are also available from your nearest representative. The following
example of calibration using the standard equipment recommended in the section
"Selecting the Standards" is described.
Selecting the Standards
Generation Function
Item to be
Standard
Calibration
Measurement
Accuracy
calibrated
Range
Range
DCV
Digital
100 mV
Max. 110 mV
±
(10 ppm+1
µ
V)
multimeter
1 V
Max. 1.1 V
±
(10 ppm+5
µ
V)
10 V
Max. 11 V
±
(10 ppm+50
µ
V)
DCA
Digital
20 mA
22 mA
±
(50 ppm+0.4
µ
A)
multimeter
Ω
Digital
500
Ω
Max. 3 V
±
(10 ppm+1 mV)
multimeter
5 k
Ω
50 k
Ω
Measurement Function
Item to be
Standard
Calibration
Generation
Accuracy
calibrated
Range
Range
DCV
Standard DC 500 mV
500 mV
±
(20 ppm+5
µ
V)
voltage
5 V
5 V
±
(20 ppm+50
µ
V)
generator
35 V
35 V
±
(20 ppm+300
µ
V)
DCA
Standard DC 20 mA
20 mA
±
(60 ppm+0.4
µ
A)
current
100 mA
100 mA
±
(40 ppm+1
µ
A)
generator
Ω
Precision-
500
Ω
500
Ω
±
50 ppm(5 ppm/˚C)
resistance
5 k
Ω
5 k
Ω
digital
50 k
Ω
50 k
Ω
multimeter
Required Environment during Calibration
Ambient temperature:
23
±
1˚C
Relative humidity:
45% to 75% RH
Power supply voltage:
100 V
±
5%
Power supply frequency: (50/60 Hz)
±
1 Hz
Warm-up time:
Before starting calibration, the standard equipment must be
warmed up for the specified time, and the instrument must be
warmed up for at least 4 hours.
Point to Note during Calibration
Make sure that the AC outlet to which this instrument is to be connected is a 3-slot
outlet with a grounding terminal.
Free Datasheet http://www.datasheet-pdf.com/