Regular testing, re-calibration and eventual sensor replacement is a requirement for almost gas detection products on the market today. These tasks are required to make sure the device is providing accurate indication of the gases being monitored and to ensure a safe environment.
Greystone’s GDT Series CO/NO2 series makes scheduling these future maintenance tasks easy by incorporating maintenance timers into each device. Just enable these features during set up and have peace of mind knowing that the device will indicate when its time to perform the required maintenance.
Recalibration or Recal Mode Timer
When enabled the device will sound the buzzer and provide LCD and status LED indication that recalibration is required. During device set up the Recal Mode Timer can be set to 1, 2 or 3 years. If set to Reset and MENU is pressed, then the Re-Cal condition is cleared, the Re-Cal timer is reset and the Re-Cal mode remains at the previous setting. The timer automatically resets if the sensor is replaced. If the sensor is calibrated with gas via the User Menu then the timer will be automatically reset. On a dual gas sensor device each sensor has a timer that can be set independently.
Calibration Kit
The GDT-CALKIT-CNC is a kit to correctly calibrate the Greystone Model GDT CO/NO2 detectors. The GDT-CALKIT-CNC includes:
- Tubing
- Regulator
- Calibration Cap
- Sponge (for CO only)
- Carrying Case (holds accessories and 2 gas cannisters)
Note: Calibration Gas is not included. To be purchased locally.
Calibration Gas Requirements (103 liter tanks):
250ppm CO in air
10ppm NO2 in air
Sensor End of Life or Fault Mode Timer
When enabled, the device will sound the buzzer and provide LCD and status LED indication when the sensor life is exceeded. During device set up the Fault Mode Timer can be set to 3, 4, 5 or 6 years. If set to Reset and menu is pressed, then the fault condition for the sensor is cleared, the life-time timer is reset, and fault mode remains at the previous setting. The timer is automatically reset if the sensor is replaced. On a dual gas sensor device each sensor has a timer that can be set independently.
Pre-Calibrated Sensor Replacement
The GDT sensor features a gas sensor POD that is pre-calibrated. This means that the POD can simply be replaced with a new calibrated POD if desired without having to remove the enclosure and the main processor board. Simply unplug the POD cable connection from the main board in the enclosure, remove the POD by unscrewing from the enclosure. Install the new POD and reconnect the POD cable. This sensor swap can be completed in seconds. There is no need to make any adjustments or apply gas to the transmitter using the sensor swap method.
