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720 Series II pH/ORP Monitor/Controllers
 The advanced "isolated" circuitry of the 720 Series II pH/ORP Monitor/controllers guarantees accurate and reliable measurements completely eliminating ground-loop and noise issues.
The unique sensor preamp allows for longer distances between the sensor and the Monitor/controller without the loss of accuracy or reliability.
All Myron L pH Monitor/controllers feature a highly refined and precise Temperature Compensation circuit. This feature perfectly matches the NERNST equation correcting the displayed reading to 25ºC. The TC may be disabled to conform with USP 24.
Built-in electronic calibration allows for fast quality checks without buffers.
(Note: for maximum system accuracy buffers are recommended).
A push-to-test button makes set point checks easy, while the internal alarm set discourages unauthorized adjustments.
Standard on all controller models is a heavy-duty 10 amp output relay, operating on either increasing or decreasing readings. Bright green/red LED's indicate above/below set point readings.
All 720 Series II models feature a IPA64/NEMA 3 splash & corrosion-proof rated enclosure. Compact in size, 6 x 4.8 inches (152 x 122mm), the 720 Series II models are suitable for panel, bench or surface mounting.
Accessories include a Remote Alarm - RA™. Custom and OEM Models available.
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Features
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| pH 0 - 14 or ORP ± 2000mV |
| Choice of analog meter or 3½ digit LCD |
| Advanced "Isolated" circuitry |
| Automatic temperature compensation to 25°C (NERNST equation) |
| Isolated 0-10 VDC recorder output - standard |
| IP64/NEMA 3X splash & corrosion proof enclosure |
| Built-in electronic calibration |
| Single setpoint/alarm standard |
| Adjustable setpoint hysterisis |
| Solid state output |
| 10 amp relay operates on choice of increasing or decreasing set point |
| Push-to-test set point check |
| Internal set point discourages unauthorized adjustment |
| Solid State 24 VDC Output |
| Selectable 115/230VAC |
| CE Approved |
| Unique, easily installed sensors |
Heavy duty "F" model sensors may be installed in ANY direction,
including inverted |
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pH/ORP Monitor/controller Specifications
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| Ranges |
0-14 pH or ± 2000mV |
| Display |
| Analog Models: 2½" (63mm) analog meter |
| Digital Models: 1/2" (13mm) 3½ digit LCD; opt. 3½ digit backlit LCD |
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| Linearity |
Electronics: ± 0.05% (0.01 pH units / ± 1 mV of full scale) |
| Resolution |
| Analog Meter: ± 0.13 pH units / ± 40mV |
| Digital Display: ± 0.01 pH units / ± 1mV |
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| Sensitivity |
0.05% of full scale (0.01 pH units / 1.0mV) |
| Stability |
± 0.05% of full scale (± 0.01 pH units / ± 1.0mV) |
| Repeatability |
± 0.05% of full scale (± 0.01 pH units / ± 1.0mV) |
| Calibration Check |
Built in (7 & 0 pH / 0 & -2000mV) |
| Recorder Output |
Isolated 0-10 VDC @ 5 mA max. (linear); standard all models |
| Sensor Input |
1 (3 input option available) pH & ORP sensors may NOT be mixed |
| Control Function |
| Single alarm/controller - |
fully adjustable 0-100% of full scale |
| Second alarm/controller - |
with above specifications, optional |
| Hysterisis - |
Adjustable from 0.3-3% of full scale |
| Indicators - |
Above (red) and below (green) setpoint LEDs (reversible) |
| Contact Rating - |
SPDT 10 amp @ 250 VAC, 30 VDC. Relay operates with increasing or decreasing reading (user selectable) |
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| Solid State Output |
Powered; 24VDC unregulated 30mA max. |
| Power |
115/230 VAC, 50/60 Hz, ±15% (user selectable) |
| Maximum Power Consumption |
100mA @115VAC |
| Dimensions |
6" (152mm) H x 4.8" (122mm) W x 3.8" (96mm) D |
| Construction |
Fully gasketed heavy-duty ABS case; splash & corrosion proof IP64/NEMA 3 rated |
| Ambient Temperature Range |
32°F to 140°F (0°C to 60°C) |
| Weight |
2 lbs (0.9 kg) |
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