Instruction Manual

3
Signet 2724-2726 and 2734-2736 Series pH and ORP Electrodes
Dimensions
Table of Contents & Dimensions
Threads:
¾ in. NPT or
ISO 7/1 R¾
18.3 mm
(0.72 in.)
95.76 mm
(3.77 in.)
6.35 mm
(0.25 in.)
19.05 mm
(0.75 in.)
25.4 mm
(1.0 in.)
44.45 mm
(1.75 in.)
2724, 2725, 2734, & 2735 Flat Glass Electrode
8.89 mm
(0.35 in.)
95.76 mm
(3.77 in.)
Threads:
¾ in. NPT or
ISO 7/1 R¾
18.3 mm
(0.72 in.)
19.05 mm
(0.75 in.)
25.4 mm
(1.0 in.)
53.34 mm
(2.1 in.)
6.35 mm
(0.25 in.)
2726 & 2736 Protected Bulb Glass Electrode
Specifi cations
General
Compatibility ..................... 2750 pH/ORP Sensor electronics,
2760 pH/ORP preamplifi er (2724-2726 only)
pH Temp Sensor:
PT1000 .............................Compatible with 2750 electronics
Connection to ............... PLC, 9900 Transmitter,
8900 Multi-Parameter Controller
3 KΩ Balco .......................Compatible with 2760 preamplifi er
Connection to ...............8750 pH/ORP Transmitter
Process Connection ......... ¾ in. NPT or ISO 7/1 R¾ threads
or Signet fl ow fi ttings
Wetted Materials:
pH (2724 & 2726) .............Ryton (PPS), glass, UHMW PE, FPM
ORP (2725) ...................... Ryton (PPS), glass, UHMW PE, FPM,
Platinum
pH (2734 & 2736) .............Ryton (PPS), glass, PTFE, FPM
ORP (2735) ...................... Ryton (PPS), glass, PTFE, FPM, Platinum
Shipping Weight .......... 0.25 kg (0.55 lb)
Performance
Effi ciency (2724-2726) ....> 97% @ 25 °C (77 °F)
Effi ciency (2734-2736) ....> 95% @ 25 °C (77 °F)
• Effi ciency indicates the "wellness" of a new electrode.
• Effi ciency is measured by comparing the actual slope (mV/pH)
at 25 °C to the theoretical output of 59.16 mV/pH.
• An effi ciency of 95% to 100% is equivalent to a slope of
56.20 to 59.16 mV/pH.
Measuring Range:
pH .....................................0 to 14
ORP .................................. ±2000 mV
3-2726-LC......................... Low Conductivity fl uids (20 to 100 μS/cm)
≤ 20 μS/cm ................... Flow must be less than 150 ml/min. in a
properly grounded system
3-2724-HF, 3-2726-HF,
3-2734-HF, 3-2736-HF...... Hydrofl uric acid resistant glass,
pH 6 or below; trace HF ≤ 2%
For applications where hydrofl uoric acid, in concentrations of 2% or less,
will attack standard pH glass in levels of pH 6 and below, or in situations
where process upsets may temporarily drop to these pH levels.
Standards and Approvals
• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.
• RoHS Compliant
China RoHS (Go to www.gfsignet.com for details)
0
-40
-20
0
20
40
60
80
100
120
°F
°C
-40 -4 32
68
104
140 176 212
248
(bar)(psi)
1.7
3.4
5.2
6.9
8.6
10.3
25
50
75
100
125
150
272X
273X
273X
272X
Maximum Temperature and Pressure Rating
Environmental Requirements
Operating Temperature
2724-2726* ................................. -10 °C to 85 °C (14 °F to 185 °F)
2734-2736* ................................. 10 °C to 100 °C (50 °F to 212 °F)
* Best performance for 3-2724-HF, 3-2726-HF, 3-2734-HF,
3-2736-HF is above 10 °C (50 °F)
Operating Pressure Range
2724-2726:
• 0 to 6.9 bar (0 to 100 psi) @ -10 °C to 65 °C (14 °F to 149 °F)
• Linearity Derated 6.9 to 4.0 bar (100 to 58 psi) @
65 °C to 85 °C (149 °F to 185 °F)
2734-2736:
• 0 to 6.9 bar (0 to 100 psi) @ 10 °C to 65 °C (50 °F to 149 °F)
• Linearity Derated 6.9 to 4.0 bar (100 to 58 psi) @
65 °C to 100 °C (149 °F to 212 °F)
Recommended storage temperature
pH/ORP electrodes ..................... 0 °C to 50 °C (32 °F to 122 °F)
• The electrode glass will shatter if shipped or stored at
temperatures below 0 °C (32 °F).
• The performance life of the electrode will be shortened if
stored at temperatures above 50 °C (122 °F).
DO NOT
FREEZE