ZED-K Electronic for Measuring and Monitoring

Brand: KOBOLD Instruments, Inc.

The evaluation unit changes the frequency signal of the pickup into a 3(4)-digit flow reading with selectable measuring unit and into a scalable analogue signal. The two threshold value relays with floating output changeover contacts continuously monitor the flow to check if the freely settable limits are exceeded or fallen short of.

Here, it is possible to select either threshold value or window monitoring. The switching point, the hysteresis, a window point and the switch on or off delay can be set separately for each relay.

The switching points can also be set directly using the control keys without having to switch over into the menu.

A red LED indicates the switching statuses. The bottom line of the display shows a bar graph of the flow readings.

The analogue output is available as current output with 0(4)-20 mA or as voltage output with 0-10 V. The parameter names in the menu can be shown in German or English. If used where the flow readings change rapidly, the display can be pacified and the analogue reading averaged by switching on some software.

A MIN/MAX reading memory determines the extreme values of the flow. The display of the readings and the resetting are achieved by using the keys, without having to change into the menu.

Resetting by using the keys can also be blocked. If the maximum set flow (exceeded range) is exceeded, it will be shown on the display. The set parameters can be protected against unauthorized alteration by using a password function.

Specifications

Ambient Temperature Range

  • -20° to 70° C (-4° to 158° F)

Dimensions

  • 3.78" × 3.78" × 4.29" (96 × 96 × 109 mm) - Screw Clamp
  • 4.6" × 4.6" × 5" (117 × 117 × 127 mm) - Field Casing

Display

  • 2 × 8-Digit LCD Display
  • 3 or 4-Digit
  • Alphanumeric LCD

Electrical Connectors

  • Cable
  • Plug-In Terminal Strip

Enclosure / Body Material

  • Fibreglass Reinforced Noryl
  • Powder-Coated Aluminum

Environmental Protection

  • IP00
  • IP40
  • IP65

Frequency

  • 0.2 to 2,000 Hz

Function

  • Reset - Control Input

Input

  • 5-24 Vdc
  • NAMUR Supply: 8.2 Vdc
  • TTL

Mounting

  • DIN Form B Connection Head
  • Pipe
  • Wall Mounted

Output

  • 0(4)-20 mA
  • 0-10 V

Output Load

  • 500 ohms - Maximum

Relay Output

  • 2 Changeover Contacts
  • 250 Vac/Vdc
  • 5 A / 1,000 VA

Sensor Input

  • 23 V (At 24 Vdc) / Maximum
  • 24 V (AC Supply) / Maximum

Supply Voltage

  • 24 Vdc ± 20 %, Approximately 80 mA
  • 90-250 Vac / Maximum

Switch Type

  • NPN Transistor
  • PNP Transistor

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