RKC INSTRUMENT SBR-EW180, User Manual, Page: 197 / 234

11-4
IMSBR10-E1
11.4 Calibrating the Recorder
Calibrate the measured value against the input.
It is recommended that the recorder be calibrated once a year to assure its measurement accuracy.
For details regarding calibration, contact your nearest RKC INSTRUMENT dealer.
Required Instruments
A calibration instrument with appropriate resolution is required for calibrating the recorder.
Recommended Instrument
• DC voltage standard
Main Specifications
Output accuracy:
±
(0.005% + 1
µ
V)
• Decade resistance box
Main Specifications
Accuracy of output range 0.1 to 500 Ω : ± (0.01% + 2 m Ω )
Resolution: 0.001
Ω
• 0 ⋅ C standard temperature device
Main Specifications
Standard temperature stability accuracy: ± 0.05 ° C
For information on purchasing the calibration instruments, contact your nearest RKC dealer.
Calibration Procedure
1. Wire the recorder and the calibration instrument as shown in the following figure, and adequately warm
up the instruments (the warm-up time of the recorder is at least 30 minutes).
2. Check that the operating environment such as ambient temperature and humidity is within the normal
operating conditions (see section 12.6).
3. Apply appropriate input signals corresponding to 0%, 50%, and 100% of the input range and calculate
the errors from the readings.
If the error is outside the accuracy specifications, contact your nearest RKC dealer.
Note
For thermocouple inputs, you must measure the temperature of the input terminal and apply a voltage
taking into account the reference junction temperature.
DC Voltage Measurement
DC voltage standard
+
−
Input terminal
L
N
SBR-EW180
+/A -/B