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‡ SIGNET
8750-2 pH/ORP Transmitter
3-8750.090-2
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.
96 mm
(3.8 in.)
96 mm
(3.8 in.)
FRONT VIEW
Field Mount &
Panel Mount
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
D-4/03 English
82 mm
8050
(3.23 in.)
42 mm
64 mm
(1.7 in.)
(2.5 in.)
106 mm (4.2 in.)
SIDE VIEW
Field Mount
Contents
1. Installation
2. Specifications
4. Menu Functions
Optional
92 mm
Rear
(3.6 in.)
Cover
56 mm
41 mm
(2.2 in.)
)
(1.6 in.
97 mm
(3.8 in.)
SIDE VIEW
Panel Mount
•
Max loop impedance:
•
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:
•
Storage temperature:
•
Relative humidity:
•
Maximum altitude:
•
Insulation category:
•
Pollution degree:
Standards and Approvals
•
CSA, CE, UL listed
•
Immunity:
EN50082-2
•
Emissions:
EN55011 Class B
•
Manufactured under ISO 9001 and ISO 14001
pH/ORP
10.20 pH
Relay 1
panel
gasket
terminals
latch
Panel Mount
Installation Detail
quick-clips
50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V
-10 to 70°C (14 to 158°F)
-15 to 80°C (5 to 176°F)
0 to 95%, non-condensing
2000 m (6562 ft)
II
2
ENGLISH
25.0°C
Relay 2
ENTER
mounting
bracket
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Table of Contents
Troubleshooting
Related Manuals for GF Signet 8750-2
Summary of Contents for GF Signet 8750-2
- Page 1 ‡ SIGNET ENGLISH 8750-2 pH/ORP Transmitter 3-8750.090-2 D-4/03 English pH/ORP Contents CAUTION! 10.20 pH 25.0°C 1. Installation • Remove power to unit before wiring input and 2. Specifications output connections. Relay 1 Relay 2 3. Electrical Connections • Follow instructions carefully to avoid personal injury.
- Page 2 Terminals 11-14: Preamplifier power and grounds Provides power for relay operation. 11-12 are DC voltages from the 8750 to power the preamplifier. 13-14 are ground terminals for the sensor and for earth ground page 2 of 12 ‡ SIGNET 8750-2 pH/ORP Transmitter...
- Page 3 System Pwr Loop – System Pwr Loop – System Pwr Loop + System Pwr Loop + AUX Power – AUX Power – AUX Power + AUX Power + Power – Supply 12–24 VDC ‡ SIGNET 8750-2 pH/ORP Transmitter page 3 of 12...
- Page 4 Monitor date for scheduled maintenance or date of last calibration. Last CAL: 06-30-00 > Easy Cal is the fastest and simplest periodic calibration method. Requires EASY 4 pH, 7 pH and 10 pH. (Any two) CAL: > page 4 of 12 ‡ SIGNET 8750-2 pH/ORP Transmitter...
- Page 5 Press the UP and DOWN keys simultaneously while any element is flashing. This will recall the Relay1 Setpnt: Saving last saved value of the item being edited and return you to Step 3. Relay1 Setpnt: 9.00 > ‡ SIGNET 8750-2 pH/ORP Transmitter page 5 of 12...
- Page 6 120 pulses per minute when the pH value reaches 8" 120 Pulses/min > Last CAL: Use this “note pad” to record important dates, such as annual recertification or scheduled maintenance. 06-30-01 > page 6 of 12 ‡ SIGNET 8750-2 pH/ORP Transmitter...
- Page 7 Press UP or DOWN keys to manually toggle the state of the relay output. > Test Relay 2: Press UP or DOWN keys to manually toggle the state of the relay output. > ‡ SIGNET 8750-2 pH/ORP Transmitter page 7 of 12...
- Page 8 > of 120 pulses per minute when the ORP value reaches +500" Last Cal: Use this “note pad” to record important dates, such as annual recertification or scheduled maintenance. 06-30-01 > page 8 of 12 ‡ SIGNET 8750-2 pH/ORP Transmitter...
- Page 9 Press UP or DOWN keys to manually toggle the state of the relay. > Press UP or DOWN keys to manually toggle the state of the relay. Test Relay 2: > ‡ SIGNET 8750-2 pH/ORP Transmitter page 9 of 12...
- Page 10 The mV value from the sensor when placed in a 7 pH buffer represents the sensor offset. Signet recommends servicing/replacing the sensor when the offset exceeds 50 mV. The 3-2759 pH/ORP system tester allows simple system troubleshooting. page 10 of 12 ‡ SIGNET 8750-2 pH/ORP Transmitter...
- Page 11 1. No temperature or mV signal from 1. Check all wiring, contacts in preamplifier. "Check Sensor?" sensor detected. 2. Verify sensor is securely installed. 2. No connection between ORP sensor 3. Replace ORP sensor. and preamplifier. ‡ SIGNET 8750-2 pH/ORP Transmitter page 11 of 12...
- Page 12 Description 3-8750-1 159 000 053 pH/ORP transmitter Field mount 3-8750-1P 159 000 054 pH/ORP transmitter Panel mount 3-8750-2 159 000 055 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...
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