PHG-3081B Industrial pH Meter
PHG-3081B Industrial pH Meter
PHG-3081B Industrial pH meter is a new pH
analyzer developed by our Company. It is a highly intelligent on-line
continuous monitoring instrument consisting of sensor and secondary meter. It
can be used together with triplex or duplex electrodes to meet various
applications. With pure water and hyperpure water electrode, it can be used to
measure the pH value of water with an electric conductivity less than 3µS/cm
(such as chemical supply water, saturated vapor, condensate, etc.). It can be
widely used for continuous pH monitoring of various water in many industries
such as power, chemical engineering, environmental protection, medicine, food,
and so on.
Features of
u Highly
intelligent: industrial pH meter uses high precision AD conversion and
singlechip micro-processing technology, and has such functions as measuring pH
value and temperature, automatic temperature compensation, and self-check of
the instrument.
u High
reliability: The components are integrated onto a circuit board, without
complex function switches, knobs or potential devices.
u Double high-resistance inputs: It introduces the latest components, and the
impedance of the double high-resistance inputs is up to 1012Ω,
providing high protection against interference.
u Solution grounding: The
interference from ground circuit can be eliminated.
u Isolated current outputs: It introduces light electric coupling
technology, providing high protection against interference and realizing
long-distance transmission.
u RS485 communication interface: With this
interface it can be conveniently connected to PC for monitoring and
communication.
u Automatic temperature
compensation: It provides automatic
temperature compensation at the range between 0～99.9℃.
u Waterproof and dust-proof design:The
protection grade is IP65, and it is suitable for outdoor use.
u Display, menu: It uses menus
similar as PCs, providing simple operation; Tips in are provided for each
operation step, and users can conveniently use it even without a user manual.
u Multi-parameter display in the
same screen: It displays several parameters in the same screen, including pH
value, input mV (or output current), temperature, time, status, and so on.
u History curve: It can save the
measurement data automatically every 5 minutes, and can store the pH data of
one consecutive month. It provides “history curve” display and “specified
time/point” inquiry on the same screen.
u Monitoring
electrode: The method, time and results of each calibration are recorded for
convenient inquiry and analysis of the changing laws of electrode.
u Digital clock: It provides several
time bases.
u High-quality display: It uses
graph-type LCD display with backlight 192 x 64 lattice, realizing display of
both graphs. It has adjustable uniform backlight, so it can be operated and
read even in outdoor dark environment.
u 25℃ conversion: It
provide 25℃ base temperature conversion for pure water and ammonified hyperpure
water, so the pH value at 25℃ can be directly displayed. This is particularly
suitable for measurement of water quality in power plants.
u Stable operation and no crash: The
watchdog program ensures continuous operation of the instrument without crash.
u Manual current source: User can
check and set freely the input current, providing convenience for checking
recorder and lower computer.
u Software-set current output: The
software selects 0～10mA or 4～20mA, and user need not touch any switch.
u Four calibration manners: Except
the traditional one-point and two-point calibration, it also provides calibration
by manual input zero-point E0, slope S and known pH value, so that
various needs of users can be met.
Technical indexes of
1. Measurement range: pH value: 0～14.00pH, precision 0.01pH;
Temperature:
0～99.9℃, precision 0.1℃;
Electric
potential: –999.9～+999.9mV, precision
0.1mV.
2. Range of automatic temperature compensation: 0～99.9℃, 25℃ is the base;
3.
Tested water sample: 0～99.9℃,
0.6MPa;
4.
Automatic temperature compensation error of electronic unit: ±0.03pH;
5. Repetition
error of electronic unit: ±0.02pH
6.
Stability: ±0.02pH/24h;
7.
Input impedance: ≥1012 Ω;
8.
Clock precision: ±1 minute/month;
9.
Isolated current output: 0～10mA
(load <1.5 kΩ),
4～20
mA (load <750 Ω);
10.
Output current error: ≤±1%FS;
11.
Data storage quantity: data of 1 month (1 point per 5 minutes);
12.
High and low alarming relay: AC220V, 3A;
13.
RS485 communication interface;
14.
Power supply: AC220V±22V, 50Hz±1Hz;
15.
Protection grade: IP65;
16.
Outline dimension: 146mm x 146mm x 180mm;
Opening dimension:
138mm x 138mm;
17.
Weight: 1.8kg;
18.
Working condition: Ambient temperature 0～60℃;
Relative humidity <85%;
19.
Triplex or duplex electrodes can be used.
pls contact email: michael@shboqu.com; if any questions of PHG-3081B Industrial pH Meter
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