8850-1eng 电导率表说明书

时间：2026-01-13

GF 8850电导率表说明书

SIGNET 8850-1 Conductivity/Resistivity Transmitter

ENGLISH

2. Specifications

General

Compatible electrodes: +GF+ SIGNET 3-28XX-1 Standard and

Certified Series Conductivity/Resistivity ElectrodesAccuracy: ±2% of readingEnclosure: Rating:NEMA 4X/IP65 front Case:PBT

Panel case gasket:Neoprene Window:Polyurethane coated polycarbonate Keypad:Sealed 4-key silicone rubber Weight:Approx. 325g (12 oz.)Display:

Alphanumeric 2 x 16 LCD

Contrast: User selected, 5 levels Update rate: 1.8 sU.S.A. Patent # 5,708,363

Electrical

Power: 12 to 24 VDC ±10%, regulated, 80 mA max.Sensor input range:

Conductance:0.055 to 400,000 µS Resistivity:10 K to 18.2 M TDS:0.023 to 200,000 ppm

( Measurements from 10 M to 18 M (0.055 µS to 0.1 µS) mustbe performed in solution temperatures from 20 °C to 100 °C. ) Temperature:PT 1000, -25 to 120°C (-13 to 248°F)

Current output:

4 to 20 mA, isolated, fully adjustable and reversible Max loop impedance: 50 max. @ 12 V

325 max. @ 18 V600 max. @ 24 V

Update rate: 200 ms

Accuracy: ±0.03 mA @ 25°C, 24 VOpen-collector output, optically isolated:

50 mA max. sink, 30 VDC maximum pull-up voltage. Programmable for:

High, Low with adjustable hysteresis

Pulse operation (max. rate: 400 pulses/min).Environmental

Operating temperature: Storage temperature: Relative humidity: Maximum altitude: Insulation category: Pollution degree:

-10 to 70°C (14 to 158°F)-15 to 80°C (5 to 176°F)0 to 95%, non-condensing2000 m (6562 ft)II2

Standards and Approvals CSA, CE, UL listed Immunity:EN50082-2 Emissions:EN55011 Safety:EN61010

Manufactured under ISO 9001 and ISO 14001

page 1 of 12

SIGNET 8850-1 Conductivity/Resistivity Transmitter

GF 8850电导率表说明书

3.Electrical Connections

Caution: Failure to fully open terminal jaws before removing wire may permanently damage instrument.

Wiring Procedure

1.Remove 0.5 - 0.625 in. (13-16 mm) of insulation from wire end.

2.Press the orange terminal lever downward with a small screwdriver to open terminal jaws.3.Insert exposed (non-insulated) wire end in terminal hole until it bottoms out.4.Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection.Wiring Removal Procedure

1.Press the orange terminal lever downward with a small screwdriver to open terminal jaws.2.When fully open, remove wire from terminal.

page 2 of 12 SIGNET 8850-1 Conductivity/Resistivity Transmitter

GF 8850电导率表说明书

3.1 System Power/Loop Connections

3.2Sensor Input Connections

Wiring Tips:

Do not route sensor cable in conduit containing AC power wiring. Electrical noise may interfere with sensor signal. Routing sensor cable in grounded metal conduit will help prevent electrical noise and mechanical damage. Seal cable entry points to prevent moisture damage.

Only one wire should be inserted into a terminal. Splice double wires outside the terminal.Select the sensor with a range closest to your process minimumand maximum values.

2819-1 (0.01 cell): 0.055 to 100 µS (10 k to 18 M )

Use the 2819-1 for all resistivity requirements 2820-1 (0.1 cell):1 to 1000 µS 2821-1 (1.0 cell):10 to 10,000 µS 2822-1 (10.0 cell):100 to 200,000 µS 2823-1 (20.0 cell):200 to 400,000 µS

Ultra-PurePureRinse

+GF+ SIGNET Sensor Ranges

2823-12822-1

Sensor Models

2821-12819-1

10 100 200

(10 k )

1,000

10,000

200,000

400,000

0.055 (18 M )