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User’s Guide
CDH-SD11
Conductivity, TDS, and Salinity Meter with Real Time SD Card Data Logger
TM
2
e
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and
reserves the right to alter specifications without notice.
Servicing North America:
U.S.A. Omega Engineering, Inc.
Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660 Fax: (203) 359-7700
e-mail: info@omega.com
For Other Locations Visit omega.com/worldwide
omega.com info@omega.com
FEATURES
1) Professional look design accurate portable meters with large LCD display, with BNC connector.
2) All electrodes with BNC connector compatible to any other electrodes.
3) Hold function, low battery icon indicator, automatic power off in 15 minutes and may be disabled.
4)
Built-in different temperature compensation selectable: Thermistor 30K, 10K ohm.
5) RFS (Recover to Factory Setting) function is included.
6)
Conductivity calibration points: 1413uS. Calibration solution is included.
7)
Conductivity electrode may convert to EC, TDS and Salinity concentration, Adjustable conductivity to TDS
conversion factor from 0.4 to 1.0. Three in one conductivity electrode (Cond/EC. TDS. Salinity) measurement.
8) Conductivity cell constant (K) selectable: 0.1, 1.0, 10 (Selectable and adjustable).
9) SD card capacity: 1GB to 8GB.
10) Tripod receptacle mountable design for long time monitoring purposes.
11) All sensors are w
ell calibrated before shipment.
12) Warranty period of meter is two years. Electrode is one year.
SUPPLIED
Meter
Electrode x 1pc (Cond/EC/TDS/Salt)
Battery-AAA x 3 pcs
1413uS buffer solution x1
9V adaptor
Black carrying case
8G SD card
SPECIFICAT
ION
Model
CDH-SD11
Parameter Cond/EC/TDS /Salt
Data logger sampling
time
Setting range
Auto 2 secs, 5 secs, 10 secs, 15 secs, 30 secs, 60 secs, 120
secs, 300secs, 600 secs, 900 secs, 1800 secs, 1Hr
Manual Press the ADJ button once will save data one time.@Set the
sampling time to 0 second.
Memory Card SD memory card 8G
Data Hold Freeze the display reading.
Meter dimension 180mm x 58mm x 32mm (With BNC connector)
Power supply AAA batteries x 3 pcs / 9V AC/DC adaptor
Temperature 0~90℃
Temp. accuracy ±0.5 ℃
Conductivity
Measurement range
0.05 uS/cm~1999 uS/cm (K=0.1) Option
30 uS/cm~20 ms/cm (K=1) Supplied
500 uS/cm ~199 mS/cm (K=10) Option
Accuracy ±1% of full scale + 1 digit
Cond Calibration 1 point 1413 uS calibration (K=1)
1 point 12.8 mS calibration (K=10)
Resolution 0~19.99 uS/cm (0.01), 0~199.9 uS/cm (0.1), 0~1999 uS/cm (1)
0~19.99 mS/cm (0.01), 0~199.9 mS/cm (0.1)
Dimension 12x120mm
Electrode body ABS
1
CDE-11G K=1 electrode replacement (Graphite type)
ADDITIONAL PURCHASE
CDE-11P K=10 option (Platinum type)
Sensor type Graphite plate
TDS (Total Dissolved Solids)
Measurement range
0 to 19.99 ppm 0 to 199.9 ppm 0 to 1999 ppm
0 to 19.99 ppt 0 to 199.9 ppt
Accuracy ±1% of full scale + 1 digit
Resolution 0.01 ppm, 0.1 ppm, 1 ppm ; 0.01 ppt, 0.1 ppt
Salt
Measurement range
0~42.0 ppt (Seawater)
Accuracy ±1% of full scale + 1 digit
Resolution 0.1 ppt
ATC Temperature
sensor
Probe port
3.5 mm diameter phone jack
Cable length 1 M
KEYP
AD (CONTROLS)
PWR: Power on (Press in one second) or power off (Press more than 2 seconds when operation).
SET: Move to left digit. Short press to toggle COND → EC → TDS → Salt. Long press to save setting.
CAL: Move to right digit. To clear SD manual record data.
MODE: Select sample rate of SD card. Toggle Cond→t1F→tds (under K value adjustment mode).
Toggle 1413 uS calibration mode to 12.8 mS calibration mode (under Conductivity calibration mode).
UNIT: Short press to change temperature unit ℃/℉. Long press to select temperature probe type.
Short press to select NTC: Negative Temperature Coefficient)/ NOT: no remote temperature probe.
HOLD: Freeze current readings (Hold shows at top of LCD). Increase value.
ADJ: Long press to start SD recording (SD card is inserted to the meter). Decrease value.
SET+UNIT: Enter cond. cell constant K value / Temp. coefficient compensation/tds K factor value mode.
Long press again to escape the K value setting. Recovery to factory setting (under calibration mode).
SET+CAL: Conductivity Calibration.
HOLD+PWR: Disable Auto Power Off.
OPERATION
COND/EC/TDS/SALT PROBE INSTALLATION (BNC connector):
a) Insert the COND electrode into the top of left hole. And insert the 3.5mm Ø diameter phone jack ATC
s
ensoring parts into the middle of hole.
b) Hold the BNC connector in one hand; with the other, insert the braid into the center of the connector.
Continuing pushing the braid into the connector until it will not go in any farther. Do this gently and slowly;
do not bend the braid.
c) Turn the BNC connector in a clockwise direction, until you cannot turn it anymore.
NOTE:
For each operation, make sure you are using fresh batteries, same brand, same power of batteries is required,
and otherwise meter shows erratic readings or leakage. Warranty is void if not follow the notices. (Note：remove
batteries when not use！)
1. There are two ways to provide power:
(a) AAA batt
eri
es x 3pcs
(b)
9V AC/DC adaptor.
Battery icon indicates when power is weak, replace with new batteries immediately as the readings
now on LCD are incorrect due to weak power.
Battery life: Approx. 50 hours for continuous used. Approx. 11.5 hours for activating SD function (w/
sample rate: 2 seconds). Approx. 13 hours for activating SD function (w/ sample rate: 1 hrs).
2
For short time measurement, you may power on by batteries. For long time use, you have to connect with
an AC/DC adaptor.
2. Make sure sensor probe and meter are well connected. Don’t attempt to detach sensor probe from meter
while in operation.
3. When Meter shows erratic readings, it must be sensor failed or power is weak.
4. Only select one of the two electrodes while measuring the same water zone, otherwise meter appears erratic
readings. Read two parameters at the same time are only available for measuring two different water sources.
(1)
POWER
NOTE: Make sure you have connected the electrode to the meter before power on.
Momentarily press PWR button to turn on the meter, press and hold PWR button to turn off meter.
(2) COND/EC/TDS/Salt MODE
Short press SET button to toggle COND → EC→ TDS → Salt
(3) CHANGE THE TEMP. UNIT TO ℃
/℉
Short press UNIT button to toggle ℃ or ℉.
(4) HOLD
Freeze the current readings of Cond./EC/TDS/Salt, then icon “Hold” will appear on the top left of screen.
(5) AUTO POWER OFF
Meter will turn off automatically in 15 minutes when no use, to disable auto power off function by pressing
HOLD and PWR button, “n” momentarily shows on screen, now meter is at non-sleep mode, then turns to
normal measurement, Meter default auto power off.
(6) FACTORY RESET
a) Cond. electrode
Whenever replacing a new cond. electrode. Long press SET+CAL to enter Cond. calibration mode then strongly
recommend doing factory reset by press SET+UNIT under 1413 uS calibration mode, screen will
show “rFS” momentarily.
(7) TEMPERATURE PROBE TYPE SELECTION
NOTE: If using NTC 10K probe but select 30K type. The temperature value will not be accurate.
Default setting is NTC 10K. User can change it depends on the electrode type to get the correct value.
NTC 10K:
Negative Temperature Coefficient 25℃ = 10 K
NTC 30K: Negative Temperature Coefficient 25℃ = 30 K
NOT: External temperature probe is excluded, user can enter the temperature degree by their own
temperature instrument, default: 25℃ Adjustable range: 0.0℃~90.0℃
Step 1: Must select correct probe type before measurement, otherwise the value would be incorrect.
Step 2: Long press UNIT button, the meter default is “ntc 10k”, short press UNIT button to toggle ntc 30k
→ not.
Step 3: Long press UNIT button again to save the setting, meter shows “SA” at the bottom of LCD and then
return to normal measurement mode.
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