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 OMEGA.

Required Instruments

A calibration instrument with appropriate resolution l˜ required for calibrating the recorder.

Recommended Instrument

DC voltage standard:

Main Specifications

Output accuracy: ±(0.005% + 1 V)

Decade resistance box:

Main Specifications

Accuracy of output range 0.1 to 500 : ±(0.01% + 2 m)

Resolution: 0.001

0°C standard temperature device:

Main Specifications

Standard temperature stability accuracy: ±0.05°C

For information on purchasing the calibration instruments, contact OMEGA.

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 OMEGA.

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 terminals

11-4

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Omega RD100B manual Calibrating the Recorder, Required Instruments, Calibration Procedure