Reed SD-4307 Conductivity/TDS/Salinity Meter/Logger

How to use Reed SD-4307 TDS Salinity Meter (Data Logger)

Function selection
This Reed Salt/TDS/Conductivity Datalogger meter has 3 measuring functions to choose from: Conductivity, TDS, and Salt. With the instrument powered on, press and hold the Function Button. The display will flash “Cd”, for Conductivity measurements, “tdS” for TDS measurements, and “SALt” for Salt measurements. Release the Function Button to choose the displayed function.
The meter is defaulted to Auto Range mode. Push the Range Button to change the range from 200μS, 2mS, 20mS, 200mS and Auto Range.

Zero Adjustment
If the probe is not immersed in the measuring solution and the display will not show a Zero Value. Press and hold the Up Button for about 10 seconds and the display will then show zero. The Zero function is only valid for the 200μS range and not when the Zero Value is < 2.0μS.

Conductivity Measurements
Always plug the Probe Plug into the Probe Socket with your meter switched off. Now power on the meter by pressing the Power Button. Select the “Cd” function and hold the Probe Handle and fully immerse the Probe Sensor into the measuring solution. Shake the Probe to let the Probe’s internal air bubble drift out from under the sensing head. The top part of the Display will show the conductivity mS (μS) values, and the lower part of the Display will show the temperature value of the solution.

TDS Measurement
With your salinity meter switched meter is off, plug the Probe Plug into the Probe Socket, then power on the meter by pressing the Power Button. Using the Function Select, navigate until the “tdS” function icon is displayed on the screen. Hold the Probe Handle and fully immerse the Probe Sensor into the measuring solution. The Display will show the Total Dissolved Solids value.

Salt Measurements
Before starts any salt measurements, your meter need to have the probe plug plugged into the Probe socket and the “SALt” function selected. The procedure is similar as TDS measurements. The display will show the Salt value (% of weight).

Data Record (Max., Min. reading)
The data record function records the maximum and minimum readings. Press the REC Button once, and a ”REC. MAX.” symbol along with the maximum value will appear on the display. Press the REC Button again, and a “REC. MIN.” symbol along with the minimum value will appear on the display.

Auto Datalogger
Press the REC Button, and the “REC” symbol will appear on the LCD screen, then press the Logger Button, the “REC” symbol will flash while the measuring data and time information is being saved in memory. To set the sampling time, and to toggle the beeper sound on or off, refer to the Advanced Settings section of this manual. Pause the Datalogging; while Datalogging, if press the Logger Button once. While paused, the “REC” symbol will stop flashing. Press the Logger Button again to resume Datalogging, and the “REC” symbol will begin to flash again.Stop Datalogging; while the Datalogger function is paused, press the REC Button for 2 seconds. The “REC” symbol will disappear indicating the Datalogging function has stopped.

Manual Datalogger
Set sampling time is to 0 second; Press the REC Button, and the “REC” symbol will appear on the LCD screen. Press the Logger Button, and the “REC” symbol will flash once and one Beep will sound, at the same time the measuring data along the time information will be saved in memory. The lower Display will show the Position (record) number, which is saved as well. To Change the Position Number; press the Down Button and the lower position number will flash on the display. Press the Up or Down Buttons to set the Position Number (1 to 99) to help identify the measurement location. The lower Display will show P x (x = 1 to 99). After the position number is selected, press the Enter Button to confirm. Stop Datalogging; press the REC Button for 2 seconds, and the “REC” symbol will disappear indicating the Datalogging function has stopped.