Dwyer WPH2 User Manual
Bulletin TE-WPH2
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LCD SCREEN
PROBE
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Waterproof pH Testing Pen
Specifications - Installation and Operating Instructions
he Series WPH2 pH Testing Pen accurately monitors pH and temperature levels
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n a variety of applications. This pocket-sized tester is ideal for pH level
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measurements in lab environments, industrial plants, or field environmental
testing. It features an easy to replace electrode and automatically recognizes up
to 3 calibration buffer solution ranges. Both pH and temperature, in both English
and Metric units, appear on the large dual display. Both the electrode and battery
ompartment caps are sealed to provide an IP65 weatherproof rating.
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OPERATING INSTRUCTIONS
Please read the manual completely before using this meter. Filing and keeping the
manual for future reference is recommended. It is also recommended to soak the
electrode for at least 30 min before using the meter to clear anything affecting the
probe.
Power Supply
The meter is powered by 4 LR44 button cell batteries. Check the batteries if it is
your first time use, if the battery symbol appears on the LCD, or if the meter cannot
power on.
To install the batteries:
1. Turn off the meter.
2. Loosen the battery cover in the counterclockwise direction (DO NOT discard the
black washer!).
3. Replace the old batteries with four new button cell LR44 batteries.
4. Make sure the batteries are in place and the polarity is correct.
5. Put the battery cover back and turn it tightly in the clockwise direction.
NOTICE
NOTICE
instrument.
It is suggested to re-calibrate the meters after changing the
batteries.
Remove the batteries from instruments that you don’t plan to
use for a month or more. Do not leave the batteries in the
SPECIFICATIONS
Range: pH: 0 to 14; Temperature: 32 to 122 F (0 to 50 C).
ccuracy: WPH2-10: ±0.2 pH, ±1°C, WHP2-20: ±0.05 pH, ±0.5°C.
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isplay: 30 mm H x 18 mm LCD dual display.
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esolution: WPH2-10: 0.1 pH, 0.1°C/°F, WPH2-20: 0.01 pH, 0.1°C/°F.
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Operating Temperature Limits: 32 to 122°F (0 to 50°C).
Storage Temperature Limits: 32 to 140°F (0 to 60°C).
Humidity Limits: <90%.
Power Requirements: (4) 1.5 V LR44 alkaline batteries, included, user
replaceable.
Calibration: One touch auto-calibration up to 3 points.
Enclosure Rating: IP65.
Electrode: Detachable single junction, KCl filled glass.
Weight: 3.9 oz (110 g).
Agency Approval: CE.
LCD Display
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
Phone: 219/879-8000 www.dwyer-inst.com
- The first display shows the measured pH reading.
The second display shows the temperature reading (Degree C or F).
CAL = Calibration mode
HLD = Data hold
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- Battery icon indicates low power
- uS/ppt/ppm/mS/mV are units not used for this pen. Only pH will be used
Keypad
Press to power on/off the meter.
Press >2 seconds to enter setting mode before power on.
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- Press with “HOLD” key to disable auto sleep function before power
on.
- Press to enter calibration mode.
Press to save and enter next step while in setting mode.
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Press to adjust while in calibration mode.
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- Press to freeze the current reading.
- Press again to release hold.
- Press to adjust while in setting or calibration mode.
Operation
1. Remove the probe cover from the meter.
2. Rotate the transparent cap to expose the electrode (see diagram below).
. Turn off the meter by pressing the button.
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. Once finished with the measurement, clean the electrode. Put the transparent
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electrode cap and meter cover back on.
WARNING
uto Power Off (Sleep Function)
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his meter will shut off automatically after 20 minutes of inactivity. For a longer
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operating time, you can disable sleep mode.
To disable the auto power off:
Before powering on, press and simultaneously until an “n” appears on the
creen. Then release the keys to return to normal mode.
s
NOTICE
Program Settings
Parameters setting function could help you to check or program your meter.
When the meter is off, press key >1 second to enter setting mode.
or pH meters, please always make the electrode wet to keep
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he electrode in a good storage condition.
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The disable sleep mode will be invalid after every power off.
3. Dip the electrode into the test solution. Press to power on the meter and stir it
to get a stable reading.
4. “pH” flashes while the meter is in measurement mode. The LCD shows the
measured pH and temperature. “pH” stops flashing when the reading is stable.
5. Press key to freeze current reading. “HLD” appears on the LCD. Press key
again to release.
Probe slope and offset value
After re-calibration, checking probe slope and offset value could help to confirm the
necessity to replace the probe.
While doing 3 points calibration, there are two available slope values and one offset
point:
While doing 1 or 2 points calibration, the slope value SL1 equals that of SL2. The
offset point is still at pH7.
When the meter is off, press for >1 second to enter setting mode. The SL1 value
will appear on the LCD. Press to view the SL2 value. Press to view the offset
value. See diagram below.
Range 1 (SL1): 0.00 to 2nd point
Range 2 (SL2): 2nd point to 14.00 pH. Offset point is at pH7.
NOTICE
Change the probe while the slope value is <75 or >115 %. Also,
change the probe if the offset value is not between -60 to 60 mV.
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