HOBO^® H6 Family

Motor on/off
Light on/off
State open/closed
External contact closure

The HOBO H6 Family of loggers record when devices change between on and off or open and closed, storing the time, date, and state for each change. Use your PC to readout and analyze the data.

Features and specifications

• Capacity: 2000 state changes
• Time resolution: 0.5 second
• Minimum state duration: 0.5 second
• Drop-proof to 5' Mounting kit included (hook/loop, magnet, and tape)
• Programmable start time/date
• Memory modes: stop when full, wrap-around when full
• Nonvolatile EEPROM memory retains data even if battery fails
• Blinking LED lights show current state
• User-replaceable battery lasts one year
• Battery check at launch and readout
• Operating range: -20C to +70C (4F to +158F), 0 to 95% relative humidity, non-condensing, non-fogging
• Time accuracy: ±1 minute per week at 20C
• Size/Weight: 60 x 48 x 19mm (2.4 x 1.9 x 0.8")/approx. 29 gms (1 oz.)
• One year warranty
• Sure-snap case

Motor on/off: AC-field sensor or vibration sensing?

AC-field sensor for mounting on motors
Magnetic field intensities fall off rapidly with increasing distance from their source (motor, transformer, or even a single wire carrying a large AC current). This means that the logger must be mounted very close to (ideally directly on) the field source. While this may make it less convenient to attach the logger, it means that interference from other sources is less likely.

Vibration sensor for convenient mounting
A vibration is only weakly dampened by distance so that the logger need not be mounted directly on the source. However, this leads to the potential of interference from other sources. The logger's threshold adjustment can be used to discriminate against
other sources.

Sensor specifications

Motor on/off with AC-field sensor

Magnetic field threshold: ~2 Gauss at 60 Hz. The logger will typically work with AC motors drawing 1 A or more. In most cases it will need to be mounted on or close to the motor housing.

Angular response: the logger is sensitive to that part of the AC field that is perpendicular to the logger's face.

Motor on/off with vibration sensor

Vibration threshold: adjustable ~0.05 G to 0.5 G at 60 Hz (.0001" to .001" displacement). Will typically work if the vibration can be felt with your hand.

Angular response: the logger is sensitive to that part of the vibration that is perpendicular to the logger's face.

Light on/off

Light threshold adjustment range: approx. 10 to 300 lumens/ft² (fluorescent light). Its sensitivity to incandescent light is about ten times greater.

 Open/closed, contact closure (HOBO State)

Two inputs: a magnetic sensor mounted in the logger and an external input cable for detecting contact closures.

Spacing between HOBO State and external magnet: closed < 1/4"; open > 3/4" (external magnet included).

External contact input: relay switch or contact closure.

AC Current Switch

The AC current switch can be used with the HOBO State Logger to record when equipment turns on and off. The AC current switch is installed around a current-carrying wire and provides a relay output to the state logger indicating equipment on/off. An adjustable threshold provides maximum application flexibility.

Features

• Adjustable current threshold (from 1.25 to 50 Amps)
• Relay output to HOBO State data logger for monitoring equipment on/off and run-times
• Built-in On/Off status lights on the CSV-A8
  

Specifications

• Amperage range: 1.25 – 50A continuous
• Sensor supply voltage: induced from monitored conductor, with no external power required
• Isolation: 600 VAC rms (maximum voltage when monitoring an uninsulated conductor)
• Temperature range: -15° to 60°C (5° to 140°F)
• Humidity range: 0 to 95% RH non-condensing
• Status output ratings: N.O. 1.0A @ 30 VAC/DC maximum, not polarity sensitive
• Off-State leakage: 0 Amps (open switch represents 1+ Megohms of resistance)
• UL Listed