Manual

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Signet 2760 DryLoc

pH/ORP Preampliﬁ er

SAFETY INSTRUCTIONS

1. Depressurize and vent system prior to installation or removal.

2. Conﬁ rm chemical compatibility before use.

3. Do not exceed maximum temperature/pressure speciﬁ cations.

4. Wear safety goggles or faceshield during installation/service.

5. Do not alter product construction.

6. When using chemicals or solvents care should be taken and appropriate eye,

face, hand, body, and/or respiratory protection should be used.

Technical Data

General

Compatible Electrodes:

Signet DryLoc Electrodes: 2724-2726, 2756-WTx - 2757-WTx,

2764-2767, 2774-2777

Compatible Instruments:

Preampliﬁ er models to Signet 5700, 8750:

2760-1, -2, -11, -21

Connector models to non-Signet products:

2760-3, -4, -31, -41

Response Time (includes response time of electrodes):

• pH: < 6 sec. for 95% of change

• ORP: application dependent

• Temperature, τ: 20 sec.

Electrical (2760-1, -2,-11, -21 Preampliﬁ ers)

• Maximum Offset: ± 7 mV

• Input Impedance, Z: > 10

• Supply Voltage (V+ to V–): 6 to 12 VDC

• Current consumption: < 1 mA

Environmental

• Enclosure Rating: 2760-1, -2, -3, -4: NEMA 6P/IP68

2760-11, -21, -31, -41: NEMA 4

with electrode and watertight

conduit and/or extension pipe

connected

Materials:

• Submersible versions: CPVC (Gray)

• In-Line versions: PBT (Yellow)

Cable: 4.6 m (15 ft) 6-conductor w/shield,

22 AWG

Maximum cable: 122 m (400 ft)

Shipping Weight: 0.64 kg (1.41 lb)

Operating Temperature: 0 °C to 85 °C (32 °F to 185 °F)

Storage Temperature: –20 °C to 85 °C (–4 °F to 185 °F)

Relative Humidity: 0 to 95%, non-condensing

(without electrode connected)

Standards and Approvals

• Manufactured under ISO 9001 and ISO 14001

China RoHS (Go to www.gfsignet.com for details)

Description

The Signet 2760 pH/ORP Preampliﬁ ers with DryLoc

connectors are part of Signet's growing line of sensors for industrial ﬂ uid

measurement and control.

There are two styles of Preampliers, and each is available with NPT or ISO threads at the cable outlet. They all connect to four different

families of pH and ORP electrodes to supply an ampliﬁ ed mV (analog) signal to Signet instruments.

The 2760 family also offers a set of connectors to link the same electrodes to third-party equipment that require a direct millivolt signal for

pH measurement without ampliﬁ cation.

Dimensions

*3-2760.090*

3-2760.090 Rev. H 05/11 English

English

31.75 mm

(1.25 in.)

89.4 mm

(3.52 in.)

70.1 mm

(2.76 in.)

56.6 mm

(2.23 in.)

3-2760-11 Preampliﬁ er, In-line, NPT

3-2760-21 Preampliﬁ er, In-line, ISO

3-2760-31 Connector, In-line, NPT

3-2760-41 Connector, In-line, ISO

3-2760-1 Preampliﬁ er, Sub, NPT

3-2760-2 Preampliﬁ er, Sub, ISO

3-2760-3 Connector, Sub, NPT

3-2760-4 Connector, Sub, ISO

CHEMICAL COMPATIBILITY WARNING

The retaining nuts of certain pH and ORP sensors and

preampliﬁ ers are not designed for prolonged contact

with aggressive substances. Strong acids, caustic

substances and solvents or their vapor may lead to failure of

the retaining nut, ejection of the sensor and loss of the process

ﬂ uid with possibly serious consequences, such as damage to

equipment and serious personal injury. Retaining nuts that may

have been in contact with such substances, e.g. due to leakage

or spilling, must be replaced.

35.0 mm

(1.38 in.)

61.0 mm

(2.40 in.)

101 mm

(4.0 in.)

Summary of content (8 pages)

PAGE 1
Signet 2760 DryLoc® pH/ORP Preamplifier English *3-2760.090* 3-2760.090 Rev. H 05/11 English SAFETY INSTRUCTIONS 1. Depressurize and vent system prior to installation or removal. 2. Confirm chemical compatibility before use. 3. Do not exceed maximum temperature/pressure specifications. 4. Wear safety goggles or faceshield during installation/service. 5. Do not alter product construction. 6.
PAGE 2
In-line Assembly and Installation 2760 In-Line models used with 2724-2726 series electrodes: 1. The 2724-2726 can use a Signet installation fitting. Electrodes are sealed by the O-ring when it is installed into a Signet installation fitting. Lubricate O-rings 2. The lower threaded nut is required to attach the electrode to the installation fitting when using a Signet fitting. 3 HAND-TIGHTEN THE THREADED NUT ONTO THE INSTALLATION FITTING.
PAGE 3
Wet-Tap Assembly and Installation The 2760 DryLoc Preamplifier can be used to connect Signet 3719 Wet-Tap electrodes to a pH or ORP instrument. 1. • • • Select the process fitting. Select a low profile installation saddle (customer-supplied) with a 1½ in. or 2 in. outlet (depending on 3719 model ordered). The 3719 is available with NPT or ISO thread options. The 3719 can also be adapted to fit into tee fittings. Refer to the 3719 pH Wet-Tap instructions for detailed information. 2.
PAGE 4
2760 Submersible Sensor Assembly and Installation The submersible 2760 can be installed in a tank or vessel if conditions are within pressure and temperature specifications. The 2760 is able to withstand fluid temperatures up to 85 °C, but the electrode tolerances vary. Check the specifications of each component before installation. 1. Insert any DryLoc electrode into base of the 2760. Lubricate O-rings with a non-petroleum based, viscous lubricant (grease) compatible with the system. 2.
PAGE 5
Wiring to Signet Instruments Any of these electrodes can be connected to the Signet ProPoint and ProcessPro pH instruments using the 3-2760-1(X) or -2(X) Preamplifiers. Wiring diagrams illustrate the actual terminals on these products for convenience.
PAGE 6
Wiring from 2760 DryLoc Preamplifier to Other Manufacturer's Equipment The 2760-1/-2 Preamplifier and electrode options may be used with third party equipment if the equipment can process the AMPLIFIED mV signal for pH and is compatible with one of the temperature compensation options. (3 K, PT1000, or 300 ). Refer to the manufacturer's manual for wiring details. Other products may use different terms to identify the function of each conductor.
PAGE 7
Wiring from 2760 DryLoc Connectors to Other Manufacturer's Equipment The 2760-3/4 Connectors can be used to interface other manufacturer's instruments to these Signet DryLoc pH and ORP electrodes. The instrument must be able to process a UNAMPLIFIED mV signal from the pH or ORP electrode. Several different temperature devices are available. Refer to the manufacturer's manual for wiring details. Other products may use different terms to identify the function of each conductor.
PAGE 8
Ordering Information Mfr. Part No. 3-2760-1 3-2760-2 3-2760-3 3-2760-4 Code 159 000 939 159 000 940 159 000 941 159 000 942 Description Submersible Preamplifier with ¾ in. NPT threads and 4.6 m (15 ft) cable Submersible Preamplifier with ¾ in. ISO 7/1R threads and 4.6 m (15 ft) cable Submersible Connector with 4.6 m (15 ft) cable and ¾ in. NPT threads Submersible Connector with 4.6 m (15 ft) cable and ISO 7/1R ¾ in.