GF Signet 8750-2 - User Manual

pH/ORP
10.20 pH
25.0°C
Relay 1
Relay 2
ENTER
‡ SIGNET
8750-2 pH/ORP Transmitter
ENGLISH
2. Specifications
General
Compatible electrodes: +GF+ SIGNET Twist-Lock 3-2720 pH/ORP
Preamplifier/3-271X Electrodes
Accuracy: ±0.03 pH, ± 2 mV's ORP
Enclosure:
• 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 second
Electrical
Power: 12 to 24 VDC ±10%, regulated, 220 mA max.
Sensor input range:
• pH: 0.00 to 14.00 pH
• Temp. (pH only) 3K Balco, -25 to 120°C (-13 to 248°F)
• ORP: -1000 to +2000 mV, isolated
(10KΩ I.D. resistance T+, T-)
Current output:
•4 to 20 mA, isolated, fully adjustable and reversible
• Max loop impedance: 50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V
• Update rate: 0.5 seconds
• Accuracy: ±0.03 mA @ 25°C, 24 V
Relay outputs (2 sets mechanical SPDT contacts):
• Maximum voltage rating: 5 A @ 30 VDC, or 5 A @ 250 VAC
resistive load
• Hi or Lo programmable with adjustable hysteresis
• Pulse programmable (maximum 400 pulses/minute)
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
• Maximum altitude: 2000 m (6562 ft)
• Insulation category: II
• Pollution degree: 2
Standards and Approvals
• CSA, CE, UL listed
• Immunity: EN50082-2
• Emissions: EN55011 Class B
• Manufactured under ISO 9001 and ISO 14001
3-8750.090-2
D-4/03 English
CAUTION!
• Remove power to unit before wiring input and
output connections.
• Follow instructions carefully to avoid personal injury.
1. Installation
ProcessPro transmitters are available in two styles: panel mount and field mount. The panel mount is supplied with the necessary
hardware to install the transmitter. This manual includes complete panel mounting instructions.
Field mounting requires a separate mounting kit. The 3-8050 Universal kit enables the transmitter to be installed virtually
anywhere. Detailed instructions for field installation options are included with the 3-8050 Universal kit.
1.1 Panel Installation
1. The panel mount transmitter is designed for installation using a 1/4 DIN Punch. For manual panel cutout, an adhesive
template is provided as an installation guide. Recommended clearance on all sides between instruments is 1 inch.
2. Place gasket on instrument, and install in panel.
3. Slide mounting bracket over back of instrument until quick-clips snap into latches on side of instrument.
4. To remove, secure instrument temporarily with tape from front or grip from rear of instrument. DO NOT RELEASE.
Press quick-clips outward and remove.
Contents
1. Installation
2. Specifications
3. Electrical Connections
4. Menu Functions
106 mm (4.2 in.)
42 mm
(1.7 in.)
64 mm
(2.5 in.)
SIDE VIEW
92 mm
(3.6 in.)
97 mm
(3.8 in.)
56 mm
(2.2 in.)
41 mm
(1.6 in.
)
Optional
Rear
Cover
Field Mount
Panel Mount
FRONT VIEW
96 mm
(3.8 in.)
96 mm
(3.8 in.)
quick-clips
gasket
panel
terminals
mounting
bracket
latch
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SIDE VIEW
Field Mount &
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Panel Mount
Installation Detail
82 mm
(3.23 in.)
8050

Summary

General Safety Precautions

Power Off Before Wiring

Remove power to the unit before wiring input and output connections.

Follow Wiring Instructions Carefully

Follow instructions carefully to avoid personal injury.

Installation

Panel Installation Overview

Instructions for installing the transmitter in a panel using a 1/4 DIN punch.

Technical Specifications

General and Electrical Specifications

Details compatibility, enclosure, power, sensor input, and current output.

Environmental Specifications

Details operating temperature, storage temperature, and humidity range.

Electrical Connections

Wiring Procedure and Tips

Step-by-step procedure for wiring and removal, with tips to avoid noise.

Terminal Group Descriptions

Descriptions for relay, sensor, power, and preamplifier terminal groups.

Sensor Input Configuration

pH and ORP Electrode Wiring Details

Diagrams and details for wiring pH and ORP electrodes with preamplifiers.

System Power and Loop Connections

Various System Power Connection Diagrams

Diagrams for stand-alone, PLC with separate/built-in supply, and multi-transmitter setups.

Open Collector Output Functionality

Relay Operation Modes

Details on Low, High setpoint, and proportional pulsing relay operation.

View Menu Operation

Display Content and Navigation

Description of permanent/temporary displays, navigation, and monitoring inputs/outputs.

ProcessPro Editing Procedure

Accessing and Navigating Menus

Steps to access CALIBRATE/OPTIONS menus, enter key code, and scroll.

Editing, Saving, and Error Handling

Procedure for editing menu items, saving, and handling errors during editing.

pH Calibration Menu

pH Setting Adjustments

Adjusting temperature offset, standard, slope, and loop range for pH.

pH Relay and Pulse Rate Configuration

Configuring relay source, mode, setpoint, hysteresis, range, and pulse rate for pH.

Easy Cal Procedure for pH

EASY CAL Access and pH Calibration Steps

Steps to access EASY CAL, enter key code, and perform pH calibration with buffers.

pH Options Menu Settings

Adjusting contrast, averaging, temp display, loop adjust, and test settings.

ORP Calibration Menu

ORP Setting and Loop Configuration

Setting standard, slope, and configuring 4-20 mA loop range for ORP.

ORP Relay and Pulse Rate Settings

Configuring relay source, mode, setpoint, hysteresis, range, and pulse rate for ORP.

Easy Cal Procedure for ORP

ORP Calibration with Quinhydrone

Procedure for ORP calibration using Quinhydrone-saturated buffers.

ORP Technical Notes and Options Menu

Technical notes on ORP calibration and options menu settings for ORP.

Troubleshooting pH Issues

pH EasyCal and Calibration Troubleshooting

Solutions for common EasyCal and calibration mode errors for pH.

pH Normal Operation Troubleshooting

Troubleshooting for constant readings or 'Check Sensor?' messages during normal operation.

Troubleshooting ORP Issues

ORP EasyCal and Calibration Troubleshooting

Solutions for common EasyCal and calibration mode errors for ORP.

ORP Normal Operation Troubleshooting

Troubleshooting for constant readings or 'Check Sensor?' messages during normal operation.

Ordering Information and Accessories

Transmitter and Accessory Part Numbers

Lists part numbers and descriptions for transmitters and accessories.

GF Signet 8750-2 Specifications

General

Model	8750-2
Category	Transmitter
Type	Flow Transmitter
Manufacturer	GF Signet
Input Signal	Frequency
Enclosure Rating	IP65
Output	4 to 20 mA
Power Supply	12 to 24 VDC
Communication Protocol	Modbus
Process Connection	1/2 in. NPT
Material	PBT
Humidity Range	0 to 95% RH, non-condensing