Digital hour meter with LCD display 230VAC

Operating Hour Meter DHM-DIN - DIN rail mounting

Product Description

The DHM-DIN operating hour meter is designed to measure the operating time of equipment powered by a 230 V AC mains supply. It counts the total time the equipment is connected to power - suitable for machines, pumps, fans, compressors, production lines and generally all devices for which the total operating time needs to be recorded.

When 230 V AC voltage is applied, the device automatically starts counting time. Values are shown on two displays and saved in memory even in the event of a power outage.

Technical Specifications

• Power supply voltage: 230 VAC (150-260 VAC), 50/60 Hz.

• Power consumption: < 6 VA

• Time counting range: up to 99 999 hours.

• Display:

  • 2 × 3 digit display (digit height 9.2 mm)

  • Mode display:

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

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

• Installation: MCB (circuit breaker) profile, DIN rail mounting.

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

• Dimensions: 35.4 × 60 × 90 mm

Application and Operating Principle

1. Connection according to diagram - after connecting the supply voltage, the meter automatically starts counting time from zero.

2. Display mode after new power-on:

   • Upper display: HHHH - three clock digits.

   • Lower display: MM S - two minute digits + one second digit.

     • seconds increase by 1 every 6 seconds

3. After exceeding 999 hours:

   • The meaning of the displays changes:

     • Lower display → hours

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

4. Power outage memory:

   • If the power supply is disconnected, the instrument retains the last measured value.

   • After re-powering, it continues counting from the stored value.

Resetting the Meter

• DHM-48: press the RESET button for 5 s.

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

• After resetting, all digits are set to 000000.

Typical Use

The meter is used for long-term monitoring of the operating time of devices that are switched on directly with the supply voltage:

• submersible pumps

• domestic water supply / darling

• self-priming pumps

• rotating machines

• compressors

• exhaust fans (carpentry, industry)

• production machines and lines

• all equipment where total operating time needs to be recorded

Suitable for maintenance intervals, maintenance planning, machine utilization control and equipment service life tracking.