Digital hour meter with LCD display 230VAC

DHM-DIN hour meter – DIN rail mounting

Product description

The DHM-DIN hour meter is designed to measure the operating time of devices powered from a 230 VAC network. It counts the total time the device is powered – suitable for machines, pumps, fans, compressors, production lines, and generally all consumers where cumulative operating time needs to be recorded.

When 230 VAC voltage is applied, the device will automatically start counting time. Values are displayed on two screens and stored in memory even during power outages.

Technical specifications

• Supply voltage: 230 VAC (150–260 VAC), 50/60 Hz

• Power consumption: < 6 VA

• Counting time range: up to 99,999 hours

• Command:

  • 2× three-digit display (digit height 9.2 mm)

  • Display modes:

    • HHH (hours) / MM (minutes) / S (seconds)

    • After exceeding 999 h → the lower display shows hours and minutes (see detailed description below)

• Mounting: MCB (circuit breaker) profile, mounting on DIN rail

• Reset: by RESET button (for DHM-DIN model, press with a non-conductive tool through the RESET hole)

• Dimensions: 35.4 × 60 × 90 mm

Usage and operating principle

1. Connection according to the diagram – after applying the power supply voltage, the counter will automatically start counting time from zero.

2. Display mode at new power on:

   • Upper display: HHH – three digits hours

   • Lower display: MM S – two digits minutes + one digit seconds

     • seconds increase by 1 every 6 seconds

3. After exceeding 999 hours:

   • Display meaning changes:

     • lower display → hours

     • right digit of the lower display → minutes (increases by 1 every 6 minutes)

4. Memory during power outage:

   • After power off, the device saves the last measured value

   • After power is restored, it continues counting from the stored value

Counter reset

• DHM-48: press the RESET button for 5 seconds

• DHM-DIN: press the hidden RESET button with a non-conductive tool (e.g., insulated screwdriver)

• After resetting, all digits are set to 000000

Typical use

The counter is used for long-term monitoring of devices powered directly:

• submersible pumps

• domestic waterworks / darling

• self-priming pumps

• rotary machines

• compressors

• exhaust fans (carpentry, industrial)

• production machines and lines

• any device where total operating time tracking is required

Suitable for service intervals, maintenance planning, machine load control, and device lifespan tracking.