PCE Instruments PCE-PHD 1 User manual

PCE Instruments UK Ltd.
Units 12/13
Southpoint Business Park
Ensign way
Southampton
Hampshire
United Kingdom, SO31 4RF
Tel: [phone]
Fax: [phone]
[e-mail]
www.industrial-needs.com
www.pce-instruments.com/english
Manual
PH-EC-O2 pH meter PCE-PHD 1
Version 2.0
18.11.2014

Manual
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Table of contents
1Introduction .............................................................................................................3
1.1 Delivery contents........................................................................................................................ 3
2Safety information...................................................................................................3
2.1 Warning symbols........................................................................................................................ 3
2.2 Safety precautions...................................................................................................................... 3
3Specifications..........................................................................................................4
4Device description ..................................................................................................7
5Instructions..............................................................................................................8
5.1 Mode selection ........................................................................................................................... 8
5.2 pH / mV measurement................................................................................................................ 8
5.3 mV measurement ....................................................................................................................... 9
5.4 pH calibration.............................................................................................................................. 9
5.5 Conductivity measurement....................................................................................................... 10
5.6 TDS measurement ................................................................................................................... 10
5.7 Conductivity calibration............................................................................................................. 11
5.8 Salt content measurement........................................................................................................ 11
5.9 Calibration of the salt content measurement............................................................................ 11
5.10 Dissolved oxygen measurement .............................................................................................. 11
5.11 Atmospheric oxygen content measurement............................................................................. 12
5.12 Calibration of the atmospheric oxygen content measurement................................................. 12
5.13 Maintenance of the oxygen probe............................................................................................ 12
5.14 Other functions ......................................................................................................................... 13
5.15 Datalogger................................................................................................................................ 13
5.16 SD card structure...................................................................................................................... 14
5.17 To save the SD card data on the computer (EXCEL software)................................................ 15
5.18 Further settings......................................................................................................................... 15
5.19 RS232 interface........................................................................................................................ 18
6Maintenance and cleaning....................................................................................19
6.1 Battery replacement ................................................................................................................. 19
6.2 System reset............................................................................................................................. 19
7Disposal.................................................................................................................19
8Contact...................................................................................................................20

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1 Introduction
Thank you for purchasing a PCE-PHD 1 meter from PCE Instruments.
This portable pH meter can test the pH value of water, as well as conductivity, temperature and the
oxygen content. The meter is delivered with an integrated conductivity sensor and a pH sensor. You can
store all values on an SD card (up to 16 GB) in Excel format and also transfer them to a computer using
the RS-232 interface. A three-point calibration and automatic temperature compensation guarantee a
high degree of accuracy even with variable temperature measurements.
1.1 Delivery contents
1 x pH meter PCE-PHD 1, 1 x pH electrode, 1 x conductivity electrode, 1 x SD memory card, 1 x card
reader, 6 x batteries and user's manual
2 Safety information
2.1 Warning symbols
General warning. Urgently consult the documentation.
Operating voltage is under its set point. Change batteries to avoid faulty measurements.
2.2 Safety precautions
Please read this user's manual carefully and completely before you use it for the first time. The device
may only be used by qualified personnel. There is no warranty of damages caused by non-observance of
the manual.
- Non-observance of the manual may be dangerous for the user or cause destruction of the device.
- The device may only be used in approved temperature and humidity range. Direct exposure to sunlight
or moisture (e. g. wet hands) must be avoided.
- The opening of the case should only be done by qualified personnel of PCE Instruments.
- The instrument should never be placed with the user interface facing an object (e.g. keyboard side on a
table).
- You must not make any technical changes to the device.
- The appliance should only be cleaned with a damp cloth / use only pH-neutral cleaner, no abrasives or
solvents.
- The meter may only be used with the accessories offered by PCE Instruments or equivalent.
- Before using the device, check the case and the test leads for visible damage. If you find damage, do
not use the device.
- The appliance must not be used in potentially explosive atmospheres.
- If the battery is flat (which is indicated by the battery indicator), do not use the meter as faulty
measurements can cause life-threatening situations. You can carry on after replacing the batteries.
- Check for proper functionality by measuring a known quantity.
- It is very urgent that you do not exceed the set points stated in the specifications.
- Before opening the case in order to replace the battery or fuse, remove all test leads to avoid an electric
shock.
- When you do not use the device for a long time, remove the batteries to avoid damage caused by
leakage of the battery.
This user's manual is published by PCE Instruments without any guarantee.
We expressly refer to our general guarantee terms, they can be found in our general terms of business.
If you have any questions please contact PCE Instruments.

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3 Specifications
PH measurement
Measurement ranges
Resolution
Accuracy
Calibration
Temperature compensation
0.00 ... 14.00 pH
0.01 pH
±0.02 pH + 2 digits
3 points (pH 4, pH 7 y pH 10)
automatic with additional temperature sensor (0
... 60ºC) or manual (0 ... 100 ºC)
Conductivity
Measurement ranges
Resolution
Accuracy
Calibration
Temperature compensation
0 ... 200.0 µS/cm
0.2 ... 2.000 mS/cm
2 ... 20.00 mS/cm
20 ... 200 mS/cm
0.01 µS/cm
0.001 mS/cm
0.01 mS/cm
0.1 mS/cm
±2 % of the measurement range + 1 digit
1413 mS/cm
automatic (0 ... 60 ºC)
Total dissolved solids (TDS)
Measurement range
Resolution
Accuracy
Temperature compensation
0 ... 132 ppm
132 ... 1,320 ppm
1,320 ... 13,200 ppm
13,200 ... 132,000 ppm
0.1 ppm
1 ppm
10 ppm
100 ppm
±2 % of the measurement range + 1 digit
automatic (0 ... 60 ºC)
Salt content
Measurement range
Resolution
Accuracy
Temperature compensation
0 ... 12 % (of weight)
0.01 %
±0.5 % of the measurement range
automatic (0 ... 60 ºC)
Oxygen
Measurement range
Resolution
Accuracy
Calibration
0 ... 20 mg/l (in water)
0 ... 100 % (in air)
0 ... 50 ºC
0.1 mg/l
0.1 %
0.1 ºC
±0.4 mg/l
±0.7 %
±0.8 ºC
in the air

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Temperature compensation
automatic (0 ... 50 ºC)
Temperature
Measurement range
Resolution
Accuracy
Temperature compensation
0 ... 60 ºC
0.1 ºC
±0.8 ºC
automatic (0 ... 60 ºC)
Technical specifications
Measurement rate
1 second up to 9 hours
Display
LCD
Memory
an SD card (up to 16 GB)
a 2 GB card included in the delivery
Interface
RS-232
Software
optional
Power supply
6 x 1.5 V AA batteries
(optional mains adapter)
Operating conditions
0 ... +50 ºC / <85 % RH
Dimensions
177 x 68 x 45 mm
Weight
490 g
Board
one-chip micro computer / LSI circuit
Data logger
Sampling time / sampling range
Auto
1 sec to 8 hrs 59 min
59 sec
(with a sampling time
of 1sec, automatic
saving may not work)
Manual
Push the data logger
button
to save data once.
(sampling time target =
0 sec)
Advanced
settings
* formatting of the SD memory card
* clock time setting ( year / month / date,
hour / minute / second )
* sampling time setting
* auto power OFF setting
* beep sound ON/OFF
* selection of decimal point for the SD card
* selection of temperature unit (°C or °F)
* compensation values setting
Power consumption
normal operation (with no saving in process and
when display light is OFF) : approx. 14 mA
with saving in process and when display light is
OFF: approx. 37 mA

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(when display light is on, the power
consumption will increase by approx. 12 mA)
Data Hold
data on display can be held / “frozen“
Memory recall
minimum and maximum values
Conditions to achieve the stated accuracies
field strength ‹ 3 V/m and frequency ‹ 30 MHz

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4 Device description
(1) Display
(2) Power button (backlight)
(3) Hold button (ESC button)
(4) REC button (Enterbutton)
(5) Mode button (▲ button)
(6) Range button (▼ button, control button)
(7) Time button
(8) Logger button (SET button, sampling check)
(9) Stand
(10) Battery compartment cover
(11) Battery comparment screw
(12) Mounting hole for tripod
(13) Temperature socket (PH ATC socket)
(14) DO socket
(15) CD socket
(16) PH socket (BNC socket)
(17) DC 9V socket for PSU
(18) Reset button
(19) RS232 interface
(20) Slot for SD card

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5 Instructions
5.1 Mode selection
1.Switch on the meter by pushing and holding the power button (2) for a few seconds.
(Pushing and holding the button again for more than two seconds switches off the device.)
2.You can choose from four modes. After pushing the mode button (5), the display will show the following
options in sequence:
PH
pH, mV ( ORP ) measurement
Do
dissolved oxygen measurement
Cd
conductivity, TDS measurement
SALt
salt measurement
5.2 pH / mV measurement
Note: The default settings of the meter are:
displayed unit = pH
temperature unit = °C
manual temperature compensation (when the probe is not connected)
automatic power off deactivated
sampling time of the data logger = 2 seconds
CAUTION: When first using the probe along with the meter, urgently calibrate before starting with the
measurement.
pH measurement (manual temperature compensation):
1.Switch on the device.
2.Select the “PH“ measurement mode.
3.Put the plug of the probe into the BNC socket (16).
4.Adapt the temperature manually to the temperature of the solution to be measured
5.Hold the handle of the probe and dip the complete probe head into the solution.
6.Stir slightly.
7.The display will show the pH value and the set temperature value.
pH measurement (automatic temperature compensation - ATC):
1. Switch on the device.
2. Select the “PH“ measurement mode.
3. Insert the plug of the probe into the BNC socket (16).
4. Insert the plug of the temperature probe into the temperature socket (13).
5. Hold the handles of the probes and dip the complete probe heads into the solution.
6. Stir slightly.
7. The display will show the pH value and the measured temperature value.
Note:
When the pH probe is not in use, the probe head must be in the protective bottle.

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5.3 mV measurement
The device has an mV (millivolt) measurig function wich allows the user to make ORP and other precise
mV measurement.
To measure the mV value:
1. Switch on the device.
2. Select the “PH“ measurement mode.
3. Push the control button (6). The display switches from pH to mV (if you push the button again, the .
display switches back from mV to pH).
4. Put the plug of the ORP probe into the BNC socket (16).
5. The display will show the mV value.
5.4 pH calibration
Background:
An ideal pH electrode generates a voltage value of zero millivolts when the pH value is seven. The device
was calibrated with signals which indicate this optimum value at an ambient temperature of 25 °C. Not all
electrodes come up to these optimum values. That is why a calibration must be carried out before first
use. Additionally, occasional calibrations of a used probe makes sense in order to ensure precise
measurements.
For calibration, a pH electrode and a pH standard solution are necessary.
To carry out a pH calibration:
1. Put the plug of the pH probe into the BNC socket (16).
2. Switch on the device.
3 .Select the “PH“ measurement mode.
4. Adapt the temperature manually to the temperature of the standard solution or put the plug of the
temperature probe into the temperature socket (13). If you want to use the temperature probe, you must
dip it into the the standard solution.
5. Dip the tip oft he pH probe into the standard solution
6. Stir slightly.
7. The display will show the pH value and the set / measured temperature value.
8. Push the REC button and the Hold button at the same time until the following is displayed:
9.Use the arrow buttons to choose one of the following indications:
for calibration by means of a solution with a pH value of 4
for calibration by means of a solution with a pH value of 7

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for calibration by means of a solution with a pH value of 10
deleting the existing calibration
10. By pushing the Enter button you can finish the calibration.
Note: You should make at least a two-point calibration (i. e. pH 7 and pH 4 calibration or pH 7 and pH
10 calibration). First calibrate with pH7 and afterwards with pH 4 / pH10. Between the processes, clean
the electrode with distilled water. Carry out the two-point calibration at least twice.
5.5 Conductivity measurement
Note: The default settings of the meter are:
displayed unit = µS, mS
temperature unit = °C
temperature compensation factor = 2 % per °C
automatic range selection
automatic power off deactivated
sampling time of the data logger = 2 seconds
CAUTION: When first using the probe along with the meter, urgently calibrate before starting with the
measurement.
To measure conductivity:
1.Put the plug of the conductivity probe into the CD socket (15)
2.Switch on the device.
3.Select the “Cd“ measurement mode.
4.Hold the handle of the probe and dip the complete probe head into the solution.
6.Shake the probe to make sure that the air bubble escapes from the probe head.
6.The display will show the conductivity value and the measured temperature value.
Manual range selection
Automatic range selection is set as default for measuring conductivity, but by means of the Range button
you can switch between the two ranges.
Zero adjustment
When the probe is not in the solution to be measured and the display still does not indicate “Zero“, you
can force “Zero“ to be displayed by pushing the zero button (5) for at least 10 seconds.
Note: Zero adjustment is only possible in the range of 200 µS and with a deviation of < 2 µS.
5.6 TDS measurement
The procedure is as in conductivity measurement. The only difference is that the unit most be switched
from µS/mS to ppm.