IQ Plus 390/590 Indicators

  • IQ Plus 390/590 Indicators

IQ Plus 390/590 Indicators

Rice Lake IQ Plus 390 Electronic Indicators

IQ Plus 390 Electronic Indicators are highly functional and so compact in size that they are perfect for crowded industrial areas or where space is limited. Consider the 390-DC with standard five-key operation or the 590-DC with a complete keypad for easy configuration and calibration. Both models operate on either battery or AC power and provide the flexibility of a counting mode.

Download the 390 IQ Plus Brochure.

Notable Features

  • NEMA 4X Fiberglas-Reinforced Polyester (FRP) enclosure
  • Bright, 2" LED Display (420HE)
  • Bold 1" Liquid Crystal Display (LCD) (390HE)
  • Universal mounting tabs (replaceable)
  • Up to 60 updates/second (420HE) or up to 30 updates/second (390HE)
  • Selectable display update rate
  • lb/kg switching
  • 5-button operation, environmentally protected mechanical switches
  • Two communication ports, full duplex RS-232
  • RATTLETRAP vibration control
  • Request
  • Specifications
  • Services

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Power 9 VDC, provided by 6 C cell alkaline batteries or AC adapter
Power consumption: (Estimated battery life)
100 mA (100 hours with 4 x 350 ohm load cells),
25 mA typical (300 hours with 1 load cell)
Excitation Voltage 5 VDC, 4 x 350 ohm or 8 x 700 ohm load cells
Analog Signal Input Range -2.5 mV to 22.5 mV or -.5 mV/V  to 4.5 mV/V
Analog Signal Sensitivity 0.3 graduation minimum
1.5 grad recommended
Resolution Internal resolution: 1 million counts
Display resolution: 100,000dd
Counting capacity: 100,000
Measurement Rate 30, 15, 7 1/2, 3 3/4 per second
System Linearity Within 0.01% of full scale
Circuit Protection RFI, EMI, ESD pro
Rating/Material NEMA 4X/IP66, stainless steel
Serial Communications EDP/Printer port: Full duplex RS-232
Display 1.0 in (24.5 mm) 6-digit Liquid Crystal Display
(LCD), 7 segment, digits
Status Annunciators Designators for: center of zero, standstill, gross,
net, lb, kg, piece count
Keyboard 6-key flat membrane panel, tactile feel
Operating Temperature Legal: 14°F to 104°F (-10°C to 40°C)
Industrial: 14°F to 122°F (-10°C to 50°C)
Weight 3 lb (1.4 kg)
Approvals NTEP -10,000 Divisions, Class III/IIIL,
CC# 03-059A1, Measurement Canada AM-5517,
Class III/IIIHD at 10,000 Divisions;
OIML approved, TC 7028, TC7628; T 5692
at 10,000 Divisions
CE marked
Warranty Two year limited warranty

Every service under one roof

At Interweigh Systems, we strive to keep your weighing equipment operating at peak performance by providing the most comprehensive range of services available in the industry today.

 Our Premier Services include:

Scale Calibration

* New - Calibration Reports delivered by email

Mass Calibration

Legal For Trade

Scale Repair

Truck Scale Repair & Calibration


Interweigh Systems Inc. provides the highest quality Mass and Scale Calibration services, as well as Legal For Trade certification of scales governed by the standards and testing of Industry Canada under the Measurement Canada approval process. Interweigh Systems Inc. is ISO/IEC 17025:2017 accredited as a calibration laboratory by the Standards Council of Canada for specific calibrations as listed on