How to use IRD CAL Portable Calibrator?
IRD CAL Portable Calibrator is an easy to use device that can be used to quickly check Calibration of Vibration Meters on-site. It has Three Switch Positions - OFF, mV/g and mV/mm/s. It has a 2 Pin MS Male Connector and an Indication Lamp for Power Status. It works on single 9V Drycell battery.
When the Slide Switch is set to mV/g position - the Calibrator generates a Pure Sine Wave of 70.7 mV AC RMS (to simulate 100 mV/g sensors) at a frequency of 100 Hz
When the Slide Switch is set to mV/mm/s position - the Calibrator generates a Pure Sine Wave of 44.14 mV AC RMS (to simulate 4 mV/mm/s sensors) at a frequency of 100 Hz
This simulated signal when connected to a Vibration Meter will lead to some display on the vibration meter. The observed display on the vibration meter needs to be compared with the expected reading chart pasted on the Calibrator body. The difference in values is the error in measurement.
We recommend getting the Portable Calibrator calibrated once every year from us to ensure accurate and precise results. We also recommend using the specified cable for checking calibration of Vibration Meters. Generally, a tolerance of +/- 10% on observed reading is acceptable
Related Articles
What Batteries does Vibration Meter IRD306DP use?
IRD306DP uses 1 or 2 x 9V Drycell batteries (depending on year of manufacture - models manufactured post May 2024 use single battery and models manufactured prior May 2024 use 2 batteries). The batteries are typically 210 mAh each and can be ...What batteries does Vibration Meter and Bearing Checker IRD811D use?
IRD811D Vibration Meter and Bearing Checker uses 1 or 2 x 9V Drycell batteries (depending on the year and month of manufacture - models manufactured pre May 2024 use 2 Batteries whereas models manufactured post May 2024 use 1 Battery). These ...How many Batteries does IRD811 Analog Vibration Meter use?
Depending on your year of manufacturing - your IRD811 Analog Vibration Meter could either be a 3 Battery Instrument or a 2 Battery Instrument. As on 10 Feb 2026, IRD811 Analog Vibration Meter is produced as a 2 Battery Instrument. It requires 2 ...How to Check Calibration of IRD306DI with its Sensor
In order to check the Calibration of IRD306DI with its Sensor IRD544, a Portable Vibration Calibrator or a Permanent Vibration Calibrator is needed. The Calibrator should have the facility to generate a pure vibration of a fixed frequency and a fixed ...What Vibration Sensor does IRD202 Vibration Meter and Bearing Health Checker use?
IRD202 Vibration Meter and Bearing Health Checker uses Accelerometer IRD521 as its Vibration Sensor. IRD521 provides 100 mV/g to IRD202 which is then used by the meter to measure Acceleration, Velocity and Displacement of Vibration IRD521 Vibration ...