Instructions for Calibrating the Datatron Channels
Note: Alarm Functionality is Temporarily Suspended for the Channel that is currently displayed on the Calibration Page.
KEY : RO = Remote operator @ sensors, CO = Computer operator
I. RTD Sensor and Temperature Transmitter Calibration
Locate the reference calibrator in the center of the working area and apply power to the unit. Be sure to allow enough time so that the reference sensors has time to acclimate.
Attach the calibrated temperature probe(s) to the system RTD sensors as close as possible to the sensing end.
RO : Identify the channel to be calibrated and tell CO the channel number.
CO : Bring channel into calibration screen and inform RO.
RO : Open the transmitter box and disconnect the RTD from "RTD" terminals. Inform CO that the sensor has been removed.
CO : Observe that the transmitter output changes, verifying that the sensor had been disconnected.
RO : Once the channel is confirmed, plug the calibrated RTD into the reference calibrator.
RO : Attach RTD Substitution Box to "RTD" connections on transmitter circuit board. Set the box output to level corresponding to lowest temperature in unit range.
RO : Inform CO that unit is in "Zero" position and announce temperature.
CO : Click mouse on "Calibrate" button on left side of window.
CO : Enter the low temperature from RO into box.
CO : Click on "Ok" button to start. Computer takes readings and displays new window requesting "Span" setting. Inform RO to go to "Span" of unit.
RO : Set RTD box to highest value of transmitter and inform CO that unit is in "Span" setting and announce the value.
CO : Enter span temperature and click on "Ok" button.
CO : Computer takes readings and displays a new window requesting that sensor to be re-attached. Inform RO to attach sensor.
RO : Connect RTD back to "RTD" terminals and inform CO of the reading of the reference value as displayed on the calibrator.
CO : Enter the temperature from reference calibrator into the box and click on "Ok". The system takes the reading and displays the new calibration factors to the right of the Initial factors. Verify that the new scale factors are within the acceptable limits. Final calibration results must be within these ranges. If not, calibration must be repeated. If the repeated calibrations do not fall within the acceptable limits for the sensor range, replace the transmitter and sensor and re-calibrate.
CO : Click on "Save" to save new data, click on "Yes" for making changes permanent.
CO : Once complete, click on "Print" to print out calibration data. Sign and date the report.
RO : Close transmitter box, apply a calibration sticker that has been initialed and dated to the cover of the sensor. Proceed to next unit.
II. Humidity Transmitter Calibration
Locate the calibrated humidity probe next to the system humidity sensor as close as possible to the sensing end.
RO : Identify the channel to be calibrated and tell CO channel number. Be sure to allow enough time so that the reference sensors has time to acclimate.
CO : Bring channel into calibration screen and inform RO.
RO : Open transmitter box and disconnect wires from "+" and "-" terminals. Observe which wire color goes to "+" and "-". Inform CO that power is removed.
CO : Observe that the transmitter output should be about 0 mA, verifying the power has been disconnected.
RO : Attach 4-20mA Calibrator to wires removed from transmitter circuit board. BE SURE TO OBSERVE POLARITY. Set box output to 4 mA position.
RO : Inform CO that unit is in "Zero" position.
CO : Click mouse on "Calibrate" button on left side of window.
CO : Enter 0.0 for the low value.
CO : Click on "Ok" button to start. Computer takes readings and displays new window requesting "Span" setting. Inform RO to go to 20mA.
RO : Set box to output 20mA and inform CO.
CO : Enter 100 for span value and click on "Ok" button.
CO : Computer takes readings and displays a new window requesting that sensor to be re-attached. Inform RO to attach power connector back onto transmitter board.
RO : Connect wires back onto the terminals and inform CO of the reading on the humidity calibrator.
CO : Enter the new humidity value into the box and click on "Ok". The system takes the reading and displays the new calibration factors to the right of the Initial factors. Verify that the new scale factors are within the acceptable limits. Final calibration results must be within these ranges. If not, calibration must be repeated. If the repeated calibrations do not fall within the acceptable limits for the sensor range, replace the transmitter and sensor and re-calibrate.
RO : Close transmitter box and wait for CO instructions.
CO : Click on "Save" to save new data, click on "Yes" for making changes permanent.
CO : Once complete, click on "Print" to print out calibration data. Sign and date the report.
RO : Close transmitter box, apply a calibration sticker that has been initialed and dated to the cover of the sensor. Proceed to next unit.
III. Pressure Transmitter Calibration
RO : Identify the channel to be calibrated and tell CO channel number
CO : Bring channel into calibration screen and inform RO.
RO : Disconnect wires from "+" and "-" terminals. Observe which wire color goes to "+" and "-". Inform CO that power is removed.
CO : Observe that the transmitter output value has changed, verifying the power has been disconnected.
RO : Attach 4-20mA calibrator to wires removed from transmitter circuit board. BE SURE TO OBSERVE POLARITY. Set unit output to 4 mA position.
RO : Inform CO that unit is in "Zero" position.
CO : Click mouse on "Calibrate" button on left side of window.
CO : Enter the minimum value of the transmitter range.
CO : Click on "Ok" button to start. Computer takes readings and displays new window requesting "Span" setting. Inform RO to go to 20mA.
RO : Set box to output 20mA and inform CO.
CO : Enter the maximum value of the transmitter range and click on "Ok" button.
CO : Computer takes readings and displays a new window requesting that sensor to be re-attached. Inform RO to attach wires back onto transmitter.
RO : Connect wires to "+" & "-" terminals and connect the pressure tubes on the transmitter to each other. Inform the CO.
CO : Enter 0.0 for the reading and click on "Ok". The system takes the reading and displays the new calibration factors to the right of the Initial factors. Verify that the new scale factors are within the acceptable limits. Final calibration results must be within these ranges. If not, calibration must be repeated. If the repeated calibrations do not fall within the acceptable limits for the sensor range, replace the transmitter and sensor and re-calibrate.
RO : Reconnect the pressure tubing, close transmitter box and wait for CO instructions.
CO : Click on "Save" to save new data, click on "Yes" for making changes permanent.
CO : Once complete, click on "Print" to print out calibration data. Sign and date the report.
RO : Close transmitter box, apply a calibration sticker that has been initialed and dated to the cover of the sensor. Proceed to next unit.
IV. CO2 Transmitter Calibration
RO : Identify the channel to be calibrated and tell CO channel number.
CO : Bring channel into calibration screen and inform RO.
RO : Disconnect the transmitter and inform CO.
CO : Observe that the transmitter output changes, verifying the disconnection of the power.
RO : Attach the 4-20mA Calibrator to the wires removed from the transmitter. BE SURE TO OBSERVE POLARITY. Set the box output to 4mA position.
RO : Inform CO that unit is in "Zero" position.
CO : Click mouse on "Calibrate" button on left side of window.
CO : Enter 0.0 for the low value.
CO : Click on "Ok" button to start. Computer takes readings and displays new window requesting "Span" setting. Inform RO to go to 20mA.
RO : Set the output to the 20mA position and inform CO.
CO : Enter 20.0 for span value and click on "Ok" button.
CO : Computer takes readings and displays a new window requesting that sensor to be re-attached.
RO : Connect the 5% CO2 gas bottle to the sensor and set the flow rate to 100 cc/min.
CO : Enter 5.0 for the reading and click on "Ok". The system takes the reading and displays the new calibration factors to the right of the Initial factors. Verify that the new scale factors are within the acceptable limits. Final calibration results must be within these ranges. If not, calibration must be repeated. If the repeated calibrations do not fall within the acceptable limits for the sensor range, replace the transmitter and sensor and re-calibrate.
CO : Click on "Save" to save new data, click on "Yes" for making changes permanent if Ok.
CO : Once complete, click on "Print" to print out calibration data. Sign and date the report.
RO : Stop gas flow rate and remove cylinder and sensor gas tube.
RO : Close transmitter box, apply a calibration sticker that has been initialed and dated to the cover of the sensor. Proceed to next unit.
V. Calibration Results
Final calibration results must be within these ranges. If not, calibration must be repeated. If the repeated calibrations do not fall within the acceptable limits for the sensor range, replace the transmitter and sensor and re-calibrate. All calibration reports must be signed and dated. The calibration reports must be given to the Director of Engineering for final review. Once the reports have been reviewed, a Certificate of Calibration will be issued to the user by the Engineering Department.
VI. Calibration Acceptance Limits
Please Contact R&D Scientific for a current list of Acceptance Limits
VII. EQUIPMENT REQUIRED
Please Contact R&D Scientific for a current list of Required Calibration Equipment for your Datatron System