Hioki DM7275-01 - Appx. 9 Calibration

Appx.22
Calibration
Appx.9 Calibration
Calibration conditions
• Ambient temperature and humidity: 23°C ±5°C, 80% RH or less
• 60 min. warm-up time
• Power supply: 100 to 240 V ±10%, 50 Hz/60 Hz, distortion rate of 5% or less
• External magnetic eld close to that characterizing terrestrial magnetism
• Settings initialized with reset
Calibration equipment and calibration points
Measurement
function
Range Calibration point Equipment
DC voltage
100 mV 0 mV, +100 mV Fluke multi-function calibration
instrument 5730A equivalent
Fluke low-thermal-electromotive-force
cable 5440A-7005 equivalent
1000 mV 0 mV, +1000 mV
10 V 0 V, +10 V
100 V 0 V, +100 V
1000 V 0 V, +1000 V
Temperature
25
°
C: 2186.0
Ω
(
±
0.1%) input
Fluke multi-product calibrator 5520A
equivalent
Connection methods
FLUKE
5730A
High
Low
High
Low
Instrument
Low-thermal-electromotive-forcecable
Fluke5440A-7005
Voltmeter calibration
FLUKE
5520A
Temp
Sensor
Low
High
Instrument
Temperature
measurement
circuit
Wiring resistance
Roundtrip500m
Ω
or less
Thermometer calibration
Voltmeter calibration
Use all copper wiring and twist the high and low wires together. Measured values are particularly
prone to the effects of thermal electromotive force when using alligator clips for connections.
Thermometer calibration
Connect the sleeve side of the temperature measurement circuit to the low side of the calibration
device.
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