FEATURES:

• Pulse Totalizer for Hygrometers, Flowmeters and Powermeters
• Accumulates up to 9,999 counts
• Noise filtering to minimize the possibility of miscounts
• Alarm output provided (with selectable threshold)
• Up to 32,000 measurements data can be collected with the optional 3911-20 for processing by PC
• Special software bundled with the 3911-20 enables storing of the recording time, interval, start, end, method and comments in the instrument’s memory
• Non-volatile memory preserves collected data even when the battery is depleted
• Compact, light weight (130g) and easy to install
• High-capacity recording (up to 32,000 data points)
• Data is protected during battery discharge and replacement
• Recording interval selectable in 16 steps between once/second and once/day
• Accepts a wide range of input voltages

• Measurement Items: Pulse input
• No-voltage input connection (e.g., switch or relay) counts when contact across terminals changes from short to open.
• Voltage input: +1.5 to 45 V high, 0 to 0.2 V low (logic state is undetermined between 0.2 and 1.5 V) A count occurs when voltage level becomes high.
• Input Channels: 1 channel
• Measurement Range: Display: 9,999 counts/interval, "OF" is displayed for 10,000+ counts (internal data is also "OF")
• Accuracy: ±1 dgt. or better
• Data Memory: 32000 data × 1ch (1-minute interval, total 22 days)
• Recording Interval: 1 to 30 seconds, 1 to 60 minutes, 1 day, 16 settings
• Power Supply: 4 x 1.5 V, LR03 (AAA) alkaline dry cell batteries, lifetime approx. 3 months (recording interval 10 minutes)
• Dimensions: 57.5 mm(2.26 in)W × 86.5 mm(3.41 in)H × 30 mm(1.18 in)D
• Weight: 130 g (4.6 oz)
• Accessories: LR03 alkaline dry cell batteries (4), 9629 CONNECTION CABLE (for measurement input, 1), 9632 CONNECTION CABLE (for alarm output, 1)