Hanna Instruments HI 98151 User Manual

Waterproof
®
pHep 1
Pocket-Sized pH Meter
OPERATION:
Do not be alarmed if
white crystals appear around the cap. This is normal with pH elec­trodes and they dis­solve when rinsed with water.
• Remove the protective cap and turn the unit on.
• Immerse pHep
®
1 in the
sample.
• Stir gently and wait until the display stabilizes.
• After use, rinse the elec­trode with water to mini­mize contamination.
• Store the electrode with a few drops of storage (HI 70300) or pH 7 (HI 7007) solution in the
0 0
3 0
I 7
protective cap.
• Always replace the pro­tective cap after use.
DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES.
• Large differences in pH readings (±0.5pH) could be due to lack of calibration, dry electrode or run-down batteries.
CALIBRATION:
The calibration procedure is simple and fast.
• Immerse the tester in a pH 7 buffer solution (HI 7007).
• Allow the reading to stabilize and using a small screwdriver turn the pH7 Cali­bration Trimmer to read 7.0.
• Rinse the electrode with water and im­merse in a pH4 (HI 7004) or a pH 10 (HI 7010) buffer so­lution.
• Allow the reading to stabilize and turn the pH 4/pH 10 Calibration Trimmer to read 4.0 (or 10.0).
Two-point calibration is now complete. ALWAYS USE FRESH BUFFERS FOR
CALIBRATION & NEVER REUSE THEM.
BATTERY REPLACEMENT:
Once the batteries are low, the display segments fade or become blank. Use a coin to remove the battery compartment cover located on the top of the tester (it will open
H
with just a 1/4 turn). Re­move the cover with its O-ring and replace all the batteries paying atten­tion to their polarity. Re­insert the cover with the O-ring and close it with a coin. It is recom­mended to recalibrate the instrument whenever you replace the batter­ies.
Batteries should only be replaced in a safe area using the battery type speci­fied in this instruction manual.
RECOMMENDATIONS FOR USERS:
Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause interference to radio and TV equipment. The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all times. During operation of instrument, ESD wrist straps should be worn to avoid possible damage to the pH electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use this instrument when voltage at the measurement surface exceeds 24 VAC or 60 VDC. To avoid damage or burns, do not perform any measurement in microwave ovens.
MADE IN PORTUGAL PRINTED IN PORTUGAL
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