Hanna Instruments HI520 - Measuring with Ph & ORP Probes; General Installation Considerations; Installation Schemes & Mounting

Measuring with pH & ORP Probes 114
21. MEASURING WITH pH & ORP PROBES
21.1. GENERAL INSTALLATION CONSIDERATIONS
• Probes are easily installed using the ¾” NPT external thread.
•
Hand tighten the probe in position. Then, depending on the process, tighten one or two turns with a wrench
to secure in place. Do not exceed the 10 N•m (7.3 lb‑ft) torque specification for the probe sensor.
• Protect the probe and membrane from strong flow to prevent unstable readings.
In turbulent aeration basin installations, place the probe in a weir for more accurate readings.
• Do not install the probe in an upside‑down position.
• Provisions must be made for the removal of the probe from the process.
• Consider probe accessibility for maintenance when selecting placement.
Note: See pH and ORP industrial probes manuals (MAN10X6-8 and MAN20X4-8) for series configuration and
detailed specifications.
21.2. INSTALLATION SCHEMES & MOUNTING ACCESSORIES
Accessories are sold separately!
In‑line mounting and flow‑cell installation require that the saddle and flow cell are completely filled with water.
21.2.1. Probe Dimensions
Ø 28 mm (1.1”)
Ø 22 mm (0.9”)
3/4’’ NPT
38 mm (1.5")
17 mm (0.7")
182 mm (7.1")
Figure 58: HI1006‑18zz industrial pH probe with attached cable
182 mm (7.1")
Figure 59: HI1006‑1800 industrial pH probe with DIN connector