Resources for U9-002
HOBO Light On/Off Data Logger
15 results found.
Stopping your data logger
All HOBO and StowAway data loggers shut off when the memory is full (unless wrap-around is selected) or the data is downloaded to a computer. Once the data is downloaded to the computer, the data logger is in off mode and will need to be relaunched to continue data collection. If the data logger you are using is shuttle-compatible and you are downloading to a shuttle, the shuttle will automatically relaunch the data logger using the previous settings.
Read tech note
Protecting data loggers from electrical discharge (ESD)
A discharge of static electricity may cause a running data logger to stop recording. Precautions should be taken to prevent this while handling the data logger. Discharges may occur when there is a charge difference between the data logger and a cable being connected to it or when a person touches an exposed jack.
Read tech note
Drying a wet circuit board
If possible, remove the board from the case and the battery from the board. Dry the board completely using a hair dryer. If the board was exposed to salt water, rinse the board with fresh water and then dry the board. You may try inserting a new battery and downloading the data. If you are unable to access the data, or see any sign of corrosion or tarnishing on the board, contact the place of purchase for a return number. The data may be retrievable, and the data logger may be repairable. Charges will apply and are dependent on the amount of damage.
Read tech note
Possibility of exposure to chemicals or chemical vapors
This is dependent on the data logger you are using and the chemical and/or concentration of the chemical to which the data logger is exposed. Many chemicals will have an adverse effect on the data loggers and/or the sensors that the loggers utilize. Contact your authorized sales representative with questions regarding specific chemical contact with the data logger that you are using.
Read tech note
Light on/off data loggers recording more states than are actually occurring
If you are monitoring fluorescent lights, part of what you are seeing may be due to a fairly common attribute of fluorescent lights. When the filaments of a fluorescent lamp and the gas inside the lamp are not up to the normal running temperature (normally the first few minutes after startup), they are likely to flicker a bit.
Read tech note
Event data logging vs State data logging
A HOBO Event data logger records the opening of the contacts only. It does not record the closing. A HOBO State data logger records changes in the state - both the opening and closing of the switch, (door open/close, light on/off, etc.). Event data will accumulate over time and totalize whereas state data will indicate a high or low position. Some HOBO series support both state and event data logging.
Read tech note
Logger power failure and data loss
The data is stored on non-volatile EEPROM. For data loggers with external batteries: change batteries and offload data, then relaunch normally. For data loggers with internal batteries: as long as the EEPROM has not been damaged, the data can be retrieved by Onset. Please contact the place of purchase for a return authorization number and request data back service.
Read tech note
Data logger is shutting off prematurely
A discharge of static electricity may cause a running data logger to stop recording. Precautions should be taken to prevent this while handling the data logger.
Discharges may occur when there is a charge difference between the data logger and a cable being connected to it or when a person touches an exposed jack.
Read tech note