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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4
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+
(
B
L
A
C
K
)
7
6
5
SIDE VIEW
Field Mount &
Panel Mount
Panel Mount
Installation Detail
82 mm
(3.23 in.)
8050
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