5. Accessories
6. Specifications
PH-2720-PA pH/ORP Preamplifier
Housing material:
CPVC
Compatible sensors:
PHE-3271
Flat Surface pH Electrode
PHE-2716
Bulb pH Electrode
ORE-2715
Flat Surface ORP Electrode
ORE-2717
Bulb ORP Electrode
Input Impedance:
>10
11
Ω
Operating temp.:
0 to 80
°
C
Gain:
X1 (unity)
Input power:
±
4.5 to
±
8 VDC, dual supply
Current consumption: <1 mA, dual supply
Quality standard:
CE
Dimensions:
PHE Series pH Electrodes - ORE Series ORP Electrodes
General Specifications
Wetted parts:
Sensor body:
CPVC
O-rings:
Viton®
Electrode junction:
Porous UHMW polyethylene
Quality standard:
CE
Maximum pressure/temperature ratings:
• 7 bar (100 psi) max. @
≤
65
°
C (149
°
F)
• 4 bar (58 psi) max. @
≤
85
°
C (185
°
F)
50
3
PSI
BAR
50 75
25
122 167
77
25
2
75
5
100
7
100
212
°
F
°
C
SAFETY INSTRUCTIONS FOR IN-LINE ELEC-
TRODE INSTALLATION
1. Do not remove from pressurized lines.
2. Do not exceed maximum temperature/pressure
specifications.
3. Do not install/service without following
installation instructions (see sensor manual).
4. Wear safety goggles and faceshield during
installation/service.
5. Do not alter product construction.
6. Failure to follow safety instructions could result
in severe personal injury!
CAUTION!
When replacing O-rings, apply O-ring lubricant to sensor O-rings
prior to preamplifier/electrode assembly. Unlubricated O-rings
may score the preamplifier sealing surface.
7. Preamplifier Troubleshooting
Procedure:
A. Install sensor adapter into preamplifier
B. With preamplifier and instrument connected, simulate pH 4, 7, and
10 and record displayed mV readings (right) and approximate
preamplifier response time between simulations.
C. Refer to table on next page for preamplifier troubleshooting tips.
Viton®
EPR
Kalrez
PP
Material
FPP-1220-0021
FPP-1224-0021
FPP-1228-0021
PH-31542-TC
Part no.
Sensor
cap
Description
Sensor O-ring,
2 required
3.6 in./
91 mm
1.8 in./
46 mm
3/4 in. NPT
female threads
Std.15 ft/
4.6 m cable
Simulator
Actual displayed
Input
mV
4.00, +177 mV
________________________
7.00, 0 mV
________________________
10.00, -177 mV
________________________
Preamplfier response time:
________________________
