GF Signet 2764-2767 Differential DryLoc pH_ORP Electrodes - Manual

Signet 275X Series Wet-Tap DryLoc ® pH and ORP Electrodes
Signet 276X Series Differential DryLoc ® pH and ORP Electrodes
Signet 277X Series Threaded DryLoc ® pH and ORP Electrodes
SAFETY INSTRUCTIONS
• Do not alter product construction.
• Depressurize and vent system prior to installation or removal.
• Confi rm chemical compatibility before use.
• Do not exceed maximum temperature/pressure specifi cations.
• Wear safety goggles or faceshield during installation/service.
• When using chemicals or solvents use appropriate body and respiratory protection.
*3-2764.090*
3-2764.090 Rev C 04/11 English
English
Description
The 275X Wet-Tap, 276X and 277X electrodes are all-purpose sensors ideal for a wide range of universal applications. They feature
a unique foul-proof DryLoc
® connector with gold-plated contacts, designed specifi cally for use with the Signet 2750 and 2760 Sensor
Electronics and Preamplifi ers. These dependable and highly responsive electrodes feature a large reference chamber volume and
intelligent positioning of internal elements that combine to extend the service life. The electrodes are offered with either fl at or bulb
sensing elements. The fl at versions allow sediment and particles to sweep past the measurement surface, minimizing the risks of
abrasion, breakage and coating. The bulb versions can be used for general purpose applications and are also offered with a glass or
plastic body for use with the 3719 Wet-Tap assembly. The choice of a PT1000 or 3 KΩ temperature sensor allows compatibility into all
Signet pH/ORP instruments.
• Signet 276X Series Differential pH and ORP electrodes feature a Ryton ® body and PTFE reference junction to resist fouling, clogging
and chemical attack under harsh chemical applications.
• Differential electrodes use a 3-electrode technique, measuring the pH and reference electrodes against a ground electrode for a
more stable output signal. The solution ground eliminates noisy measurements by draining electrical current away from the reference
electrode. The reference electrode is housed in a glass half-cell embedded in the reference chamber to protect it from poisioning or
contamination. The electrolyte chamber is refi llable and the salt bridge is fi eld replaceable.
• Signet 277X Series pH and ORP electrodes are dependable and highly responsive electrodes featuring a PTFE double reference
junction, a KNO
3
salt bridge and a large reference chamber that combine to extend service life.
• Both the 276X Series and the 277X Series feature a unique foul-proof DryLoc ® connector with gold-plated contacts designed
specifi cally for use with the Signet 2750 and 2760 preamplifi ers, sensor electronics, and connectors. They are available with either fl at
or bulb style sensing elements. The bulb versions can be used for general-purpose applications. The fl at versions allow sediment and
particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating. All versions can be installed at
any angle.
• The temperature device is positioned at the tip of the measurement surface, resulting in a temperature response of less than
1 minute. Temperature devices available include 3 KΩ, 300 Ω, or PT1000 RTD.
45 mm
(1.8 in.)
43 mm
(1.7 in.)
121 mm
(5.27 in.)
1 in.
NPT ¾ in.
NPT ¾ in.
NPT
32 mm
(1.3 in.)
276X Series
Differential
Electrode 277X Series
Bulb Electrode 277X Series
Flat Electrode
Dimensions
218 mm
(8.57 in.)
35 mm
(1.4 in.)
11.9 mm
(0.47 in.)
2756 Wet-Tap pH
2757 Wet-Tap ORP
Electrode
Lubricate O-rings with a
non-petroleum based,
viscous lubricant (grease)
compatible with the
system.