ACM-1 Transmitter/Controller

Brand: KOBOLD Instruments, Inc.

The compact KOBOLD transmitter / controller ACM-1 measures the conductivity value, TDS value or specific resistance. It is avail- able as panel-mounted device according to DIN/EN 61554 or as field housing.

Measured values and parameters are displayed on a high-contrast graphic display in plain text. Easy configuration via buttons or PC with optional software provide a simple and user friendly operation.

An integrated math and logic module enables the integration of the measured values in mathematical formulas so that the measured variables can be displayed. The transmitter has two Analog and two binary inputs.

Specifications

Accuracy

  • ± 5 ohms
  • ≤ 0.05 % (Resistance ± 4 ohms) - Optional Board Standard Signal
  • ≤ 0.25 % of Measuring Range - Temperature Pt100/Pt1000
  • ≤ 0.5 % - Optional Board Analog Output
  • ≤ 0.6 % of Measuring Range + 0.3 µS × Cell Constant (K) - Conductivity Value
  • ≤ 1.5 % of Measuring Range - Temperature NTC/PTC
  • 0.25 % of Measuring Range - Standard Signal

Ambient Temperature Range

  • -5° to 50° C (23° to 122° F) - Field Housing
  • -5° to 55° C (23° to 131° F) - Panel Mounting

Circuit Protection

  • Varistor - Optional Board Semiconductor Relay TRIAC

Communication

  • Baud Rate: 9,600, 19,200, 38,400 bit/sec (RS-422/485)
  • Modbus
  • PROFIBUS DP
  • RS-422, RS-485

Consumption

  • 13 VA, Maximum

Display

  • 122 × 32 Pixel LCD Graphic Display (Blue with Backlight)

Electrical Connectors

  • 14 AWG (2.5 mm²)
  • Screw Terminal - Rear

Electrical Contacts

  • Changeover Contact - Optional Board 1 Relay

Electrical Rating

  • 1 A at 240 Vac Resistive - Optional Board Semiconductor Relay TRIAC (Output)
  • 3 A at 240 Vac Resistive - Optional Board Double Relay (Output)
  • 5 A at 240 Vac Resistive Load - Optional Board 2 Relay (Output)
  • 8 A at 240 Vac Resistive - Optional Board 1 Relay (Output)
  • U ≤ 50 Vac/Vdc - Optional Board 2 Semiconductor Relay Photo-MOS

Enclosure, Body Material

  • Aluminum
  • Plastic - for Panel Mounting According to DIN IEC 61554

Environmental Protection

  • IP20 - Rear
  • IP65 - Front & Field Housing

Humidity

  • ≤ 90 % Relative Humidity Annual Mean, Non-Condensing

Input

  • 0-10 V - Standard Signal Measuring Control Range
  • 0-20 mA - Standard Signal Measuring Control Range
  • 4-20 mA - Standard Signal Measuring Control Range
  • PTC/NTC 0.1 to 30 kiloohms - Measuring & Control Range

Load Impedance

  • ≤ 500 ohms - Optional Board Analog Output

Mounting

  • Panel Mount

Mounting Position

  • Horizontal

Output

  • ± 5 Vdc, 5 mA - Optional Boards Supply ISFET
  • 0(2)-10 V - Optional Board Analog Output
  • 0(4)-20 mA - Optional Board Analog Output
  • 12 Vdc, 10 mA - Optional Boards Supply Proximity Switch
  • 2 Relay (Changeover Contact)

Power Requirement

  • 110-240 Vac
  • -15 / +10 %, 48 to 63 Hz - Standard
  • 20-30 Vac/Vdc, 48 to 63 Hz - Special

Resistance

  • 100 ohms to 3 kiloohms

Sensor / Probe Connection

  • 2-Wire

Storage Temperature

  • -30° to 70° C (-22° to 158° F)

Supply Voltage

  • ± 5 Vdc - Sensor
  • 12 Vdc - Sensor
  • 17 Vdc at 20 mA - Sensor
  • Approximately 25 Vdc - Open-Circuit Voltage

Temperature Effect

  • 0.1 %/10 K - Resistance Transmitter
  • 0.2 %/10 K
  • 100 ppm/K - Optional Board Standard Signal

Temperature Range

  • -50° to 250° C (-58° to 482° F)

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