Process Pro Signet 8750 pH / ORP

The SIGNET 8750 pH/ORP Transmitter is designed for broad application and ease of setup and use. The unit auto-configures for either pH or ORP use when connected to +GF+SIGNET pH or ORP sensors. Multiple mounting options allow for installation best suited to your particular application. The automated "Easy-cal" menu features automatic buffer recognition for mistake proof pH or ORP sensor calibrations. Two-line LCD provides sensor diagnostic information for ease in system maintenance.

These user friendly flowmeters provide a convenient way to display pH and temperature or ORP and temperature or mVolt and temperature.  Optional relays provide control for adjustment or alarms.   Optional dual input device is also available.
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Features

  • Display in Deg. C or Deg. F
  • Hold and Simulate functions
  • Integral or remote mounting
  • Relay options
  • Output scalability
  • Dual output option allows temperature and pH signal transmission
  • 2 x 16 character dot matrix LCD
  • Chemical resistant enclosure and self-healing window
  • Large pushbuttons
  • Clearly marked terminal labels

Applications

  • Neutralization systems
  • Heavy metals recovery
  • Plating control
  • Scrubber control
  • Pool and spa control
  • Water treatment
  • Water quality monitoring
  • Disinfecting
Enclosure:
· Rating: NEMA 4X/IP65 front
· Case: PBT
· Window: Polyurethane coated polycarbonate
· Keypad: Sealed 4-key silicone rubber
· Weight: Approx. 325g (12 oz.)
Environmental
Operating temperature: -10 to 70°C (14 to 158°F)
Storage temperature: -15 to 80°C (5 to 176°F)
Relative humidity: 0 to 95%, non-condensing

Accuracy: ±0.03 mA at 25°C, 24 V

 Compatible electrodes:
SIGNET 3-27XX pH/ORP
Preamplifier/Electrodes

Display:
· Alphanumeric 2 x 16 LCD
· Update rate: 1 second
· Contrast: User selected, 5 levels

Standards and Approvals
· CSA, CE, UL listed
· Manufactured under ISO 9001
Electrical
Sensor input range:
  • pH: 0.00 to 14.00 pH
  • temp. 3K Balco, -25 to 120°C (-13 to 248°F)
  • ORP: -1000 to +2000 mV, isolated (10K I.D. resistance T+, T-)

Current output:
· 4 to 20 mA, isolated, fully adjustable and reversible
· Power: 12 to 24 VDC ±5%, regulated

Relay output:
· Mechanical SPDT contacts: Hi, Lo, Pulse, Off

Maximum voltage rating: 5 A at 30 VDC, or 5 A at 250 VAC resistive load

Max loop impedance: 50 ohms max. at 12 V, 325 ohms max. at 18 V, 600 ohms max. at 24 V

Update rate: 0.5 seconds

Hysteresis: User-adjustable

Max 400 pulses/min. Open-collector output: Hi, Lo, Pulse, Off

Open-collector, optically isolated, 50 mA max, sink, 30 VDC max. pull-up voltage.

Max 400 pulses/min.

Installation

The transmitter is available in a panel mount or a field version. The field version is mounted to the sensor using the integral mount kit (3-8051) or you may select the universal mount kit (3-8050) to mount the transmitter on a surface near the sensor.

All panel mount transmitters (3-8750-xx) include a mounting bracket and gasket for a NEMA 4X watertight panel installation. Panel mount transmitters fit into a standard 1/4 DIN panel cutout.

The Integral Mount Kit (3-8051) can be ordered separately and includes a conduit base, locking ring, and integral adapter for mounting the transmitter and sensor directly in a pipe.

The Universal Mount Kit (3-8050) can be ordered separately and includes a conduit base, locking ring, and universal adapter for mounting the transmitter on a pipe, wall, or other stationary surface.

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Ordering Information and Instruction Sheets (in PDF file)

Mfr. Part No. Code PDF file Description
3-8750-1 159-000-053 8750-1 pH/ORP transmitter Field mount
3-8750-1P 159-000-054 pH/ORP transmitter Panel mount
3-8750-2 159-000-055 8750-2 pH/ORP transmitter Field mount with relays
3-8750-2P 159-000-056 pH/ORP transmitter Panel mount with relays
3-8750-3 159-000-057 8750-3 pH/ORP xmtr Field mount with dual input/output
3-8750-3P 159-000-058 pH/ORP xmtr Panel mount with dual input/output

Sensors            pH sensors      ORP sensors

All signet flow sensors are compatible with 8550 or 8551 (except when using integral kit).

Mfr. Part No. use with  Description
3-8510-P0 8551 integral kit polypro/titanium 1/2" to 4"
3-8510-P1 8551 integral kit polypro/titanium 5" to 8"
3-8510-V0 8551 integral kit PVDF/Hastelloy 1/2" to 4"
3-8510-V1 8551 integral kit PVDF/PVDF 1/2" to 4"

Accessories

Mfr. Part No. Code Description
3-8050 159-000-184 Universal mounting kit
3-8050.395 159-000-186 Transmitter NEMA 4X rear cover
3-8051 159-000-187 Flow Integral kit Mnt NPT
3-8050.396 159-000-617 RC Filter kit (for relay use)

Dimensions and wiring of ProcessPro Units - Field & Panel

Engineering Specifications
· The transmitter shall be manufactured under ISO 9001 certified processes.
· The transmitter shall be field or panel mountable.
· The transmitter shall display pH, mV and temperature.
· The display units shall be fully scaleable.
· The device shall meet NEMA 4X and IP65 standards.
· The operating voltage shall be 12 to 24 VDC.
· The transmitter shall have a 4 to 20 mA output with an open collector output, 5 to 30 VDC or a 4 to 20 mA output with 2 relays, or dual 4 to 20 mA outputs with dual open collector capability.
· The transmitter shall have security code capability.
· The transmitter shall have simulate capability.
· The transmitter shall hold an output value while calibrating.
· The transmitter shall be +GF+SIGNET, Model 8750 pH/ORP Transmitter.

This unit has replaced the Compac Series 8710 - information

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