3G Tech / HBS Equipment 700 Digital Amp / Time Meter

The 3G Tech / HBS Equipment 700 is a digital amplifier and time meter that measures current via external shunt monitoring and counts down pre-selected AMP-HOURS or AMP-MINUTES intervals. The instrument accumulates total AMP-HOURS or AMP-MINUTES and signals cycle completion through two programmable Form C relays. A bright six-digit LED display provides real-time readout of current and accumulated values.

High-resolution analog-to-digital conversion with input filtering ensures accurate shunt signal processing. Non-volatile EEPROM memory preserves accumulated counts during power loss, provided power has been applied for a minimum of 5 seconds before shutdown.

Technical Specifications

• Display: Six-digit LED


• Current Measurement: External shunt monitoring


• Measurement Modes: Countdown (AMP-HOURS or AMP-MINUTES) and accumulation of total AMP-HOURS or AMP-MINUTES


• Relays: Two Form C relays, programmable for control and monitoring


• Input Impedance: High impedance shunt input


• Signal Processing: High-resolution A/D converter with input filtering


• Memory: EEPROM parameter storage with non-volatile data retention


• Control Inputs: Pins 1 & 2 (power), Pin 3 (input signal), Pin 4 (reset, resettable models only)

Key Features

• Programmable countdown timer for amp-hour or amp-minute cycles


• Dual-mode accumulation tracks both cycle and total consumption


• High-impedance shunt input for direct current measurement


• AC/DC and DC Only operating models available


• Resettable configuration option with software-controlled memory clearing


• Minimum signal duration: 0.5 seconds (AC/DC) or 1 millisecond (DC Only)


• Reset signal duration requirement: Minimum 0.5 seconds after 5-second power stabilization


• Data persistence: Accumulated values retained in non-volatile memory

Typical Applications Industrial cycle monitoring, current accumulation tracking, electrochemical processes, battery testing, and time-dependent current-consuming operations requiring programmable relay actuation and data logging.

Compatibility & Integration Designed for external shunt-based current measurement systems. Two Form C relay outputs accommodate diverse control architectures. Pin-configurable inputs support both AC/DC and DC-only power supplies and signal processing requirements.