3
Specifications
pH Electrode
pH range
0–14
Temperature range
5 to 80°C (readings not compensated)
Accuracy
±0.5 pH units (factory calibration)
±0.1 pH units (user calibration)
Type Single
junction
Sealed, gel-filled, Ag/AgCl
Response time
2 s (to 90% of full reading in buffer)
Shaft diameter
12 mm OD
Shaft material
Polycarbonate plastic
Electrode Amplifier
Radio
2.4 GHz Bluetooth 4.0, Low Energy
Battery
100 mA Li-Poly
Battery life (continuously on,
1 sample per second)
3 days
Input range
±1000 mV
Temperature range
–10 to 45ºC
Maximum wireless range
30 m unobstructed
How Go Wireless pH Works
The electrode amplifier handle is a circuit that allows the standard combination pH
electrode to be monitored by a lab interface wirelessly.
The Go Wireless pH will produce a voltage of approximately 0.0 volts in a pH 7
buffer. The voltage will increase by about 60 mV for every pH number decrease.
The voltage will decrease by about 60 mV/pH number as the pH increases. It should
read approximately 160 mV in pH 4 buffer and
170 mV in pH 10 buffer.
The Vernier gel-filled pH Electrode is designed to make measurements in the pH
range of 0 to 14. The gel-filled reference half cell is sealed; it cannot be refilled.
Go Wireless Electrode Amplifier has one button and three LEDs.
Button
Press the button once to turn on Go Wireless Electrode Amplifier. A red LED
indicator flashes when the unit is on.
Press and hold the button for more than three seconds to put Go Wireless
Electrode Amplifier into sleep mode. The red LED indicator stops flashing when
sleeping and LED light is off.
Press and hold the button for more than eight seconds to reset the system. This
should not be necessary in normal operation.
Blue LED
Indicates charging status when Go Wireless Electrode Amplifier is connected to the
Charging Cable or Charging Station.
On – charging in progress
Off – charging is complete
4
Red LED Flashing
Indicates Go Wireless Electrode Amplifier is awake and ready to connect.
Green LED Flashing
Indicates Go Wireless Electrode Amplifier is connected and taking data.
Red and Green LED Off
Indicates Go Wireless Electrode Amplifier is in the lowest power sleep mode.
Collecting Data
Ensure that the BNC connection between the Go Wireless Electrode Amplifier and
the pH Electrode is secure.
To prepare the electrode to make pH measurements, remove the storage bottle from
the electrode by first unscrewing the lid and then removing the bottle and lid.
Thoroughly rinse the lower section of the probe, especially around the bulb-shaped
tip, using distilled or deionized water.
Note:
Do not completely submerge the sensor.
The handle is not waterproof.
Collecting Data with Go Wireless App
1. Press the power button on Go Wireless Electrode Amplifier to turn it on. The
LED on the sensor will flash red.
2. Launch the app. Select your Go Wireless pH from the list of available sensors.
When the sensor is paired with the software, the sensor LED will flash green.
Note:
To collect data in mV, tap on the radio icon in the upper right corner. Under
Units, select mV.
3. Place the sensor tip into a beaker containing your sample. It is recommended that
you use a utility clamp or electrode support to fasten the pH Sensor to a ring
stand, as shown on next page.
