Environmental Express 100 Series User manual

100 Series Portable pH/Cond. Meter

Instruction Manual

pH 100 portable pH Meter

EC 100 portable conductivity Meter

PC 100 portable pH/Cond. Meter

Environmental Express

www.environmental express.com

 
Table of Contents 
BRIEF Introduction........................................................................................................................... - 1 -
1 Measuring parameters .............................................................................................................. - 1 -
2 Features and functions.............................................................................................................. - 1 -
3 Features of measuring parameters............................................................................................. - 2 -
Technical Specifications ................................................................................................................... - 2 -
1 Parameter specifications ........................................................................................................... - 2 -
2 Other specifications .................................................................................................................. - 4 -
Instrument Desctiption.................................................................................................................... - 4 -
1 LCD display ............................................................................................................................... - 4 -
2 Keypad functions ...................................................................................................................... - 5 -
3 Meter sockets ........................................................................................................................... - 6 -
4 Display mode and other functions ............................................................................................. - 6 -
5 Other functions......................................................................................................................... - 7 -
pH Measurement ............................................................................................................................ - 8 -
1 pH electrode information .......................................................................................................... - 8 -
2 Calibration solution and calibration mode.................................................................................. - 8 -
3 pH measurement ...................................................................................................................... - 9 -
4 pH test.................................................................................................................................... - 10 - 
5 Information regarding pH calibration and measurement .......................................................... - 10 - 
6 Customized calibration (take 1.60pH & 6.50pH as example)...................................................... - 11 - 
7 Notes regarding customized calibration ................................................................................... - 11 - 
8 Self-diagnosis information....................................................................................................... - 11 - 
9 Maintenance of the pH Electrode ............................................................................................ - 12 - 
mV and ORP Measurement............................................................................................................ - 13 - 
1 mV measurement ................................................................................................................... - 14 - 
2 ORP measurement.................................................................................................................. - 14 - 
Conductivity Measurement............................................................................................................ - 15 - 
1 Conductivity electrode information ......................................................................................... - 15 - 
2 Information about conductivity calibration.............................................................................. - 16 - 
3 Conductivity calibration (take 1413 μS/cm as an example) ....................................................... - 17 - 

 
4 Relation between TDS and conductivity................................................................................... - 18 - 
5 Sample test............................................................................................................................. - 18 - 
6 Conductivity electrode maintenance ....................................................................................... - 19 - 
Parameter setting.......................................................................................................................... - 20 - 
1 Main menu of parameter setting ............................................................................................. - 20 - 
2 Sub-menu of pH parameter setting.......................................................................................... - 21 - 
3 Sub-menu of ORP parameter setting........................................................................................ - 22 - 
4 Sub-menu of conductivity parameter setting ........................................................................... - 22 - 
5 Sub-menu of basic parameter setting....................................................................................... - 24 - 
What’s in the Kit?.......................................................................................................................... - 25 - 
Warranty....................................................................................................................................... - 25 - 
 

- 1 -

1 BRIEF INTRODUCTION

Thank you for purchasing Environmental Express 100 series Portable pH/Cond. Meter (hereafter

referred to as the instrument). The instrument is an outstanding combination of the most advanced

electronic technology and software design.

Before using the product, please read this manual carefully to help you properly use and maintain

the product. Environmental Express reserves the right to update the content of this manual without

giving prior notices.

1.1 Measuring Parameters

Measuring Parameters

pH100

EC100

PC100

√

mV/ ORP

√

Cond./TDS/Salinity

√

Temperature

√

1.2 Features and Functions

⚫The built-in microprocessor chip enables advanced functions such as auto

calibration, auto temperature compensation, parameter setting, self-diagnosis,

auto power-off, low-battery reminder, etc. PC100 meter can measure pH &

conductivity at the same time. See diagram on the right, pH electrode,

conductivity electrode and the temperature probe can be installed on the clip

for simultaneous measurements.

⚫The meter adopts advanced digital processing technology, intelligently

improves the response time and accuracy of the measurements. Stable reading

and auto lock display mode are available for choice.

⚫Meets IP57 waterproof and dust resistant rating, ideal for use under harsh

environment.

- 2 -

1.3 Features of Measuring Parameters

Measuring

Parameter

Features

Applicable

Model

● 1~3 points auto calibration with calibration guide & self-diagnosis function.

● Automatic recognition of pH calibration solutions: USA, NIST & CUS (user-

defined).

pH100

PC100

With temperature measurement and display function.

pH100

PC100

ORP

With ORP calibration function

pH100

PC100

Cond.

● 1~ 4 points auto calibration with calibration guide and auto-check function.

● Automatic recognition of conductivity calibration solutions: Standard & CUS

(User-defined).

● Single-tap switch among conductivity, TDS and Salinity.

EC100

PC100

2 TECHNICAL SPECIFICATIONS

2.1 Parameter Specifications

Technical Parameters

Applicable

Models

Range

0.00 ~ 14.00pH

pH100

PC100

Resolution

0.01/0.1 pH

Accuracy

±0.01 pH

Temperature

compensation

range

0 ~ 100°C (Auto or manual)

Calibration

1~3 points auto calibration

Buffer solutions

USA, NIST

Measuring

Range

±1000mV

pH 100

- 3 -

Resolution

-200 ~ 200mV: ±0.1mV

Other range: ±1mV

PC 100

Accuracy

±0.2% F.S.

ORP

Range

±1000mV

pH 100

PC 100

Resolution

1mV

Accuracy

±0.2% F.S.

Calibration

Range

±50mV of reading

Conductivity

Measuring

Range

0~200 mS/cm, including 5 ranges:

0.00~19.99μS/cm, 20.0~199.9μS/cm, 200~1999μS/cm,

2.00~19.99mS/cm, 20.0~199.9mS/cm

EC 100

PC 100

Resolution

0.01/0.1/1μS/cm, 0.01/0.1 mS/cm

Accuracy

±1.0% F.S.

Temperature

compensation

range

0 ~ 60°C (Auto or manual)

Electrode

Constant

0.1 / 1 / 10 cm-1

Temperature

coefficient

0~9.99%/°C

Reference

temperature

15~30°C

Calibration

1~4 points automatic

Calibration

solutions

84μS/cm, 1413μS/cm, 12.88mS/cm, 111.8mS/cm

TDS

Range

0~100g/L

EC 100

PC 100

Accuracy

±1.0% F.S.

Salinity

Range

0~100ppt

EC 100

PC 100

Accuracy

±1.0% F.S.

Temperature

Range

0~100°C

pH 100

EC 100

PC 100

Resolution

0.1°C

Accuracy

±0.5°C ±1digit

- 4 -

2.2 Other specifications

Power

AA batteries x 3 (1.5V×3)

IP rating

IP57 waterproof and dust resistant

Dimension &

Weight

Meter: 91×190×33mm, (3.58”x7.48”x1.29”) / 342 gm

Carrying case: 330×270×82mm, (12.99”x10.63”x3.22”) / 0.59 kg

Paper box: 255×200×45mm, (10.04”x7.87”x1.77”) /1.28 kg

3 INSTRUMENT DESCRIPTION

3.1 LCD display

①

Measuring mode icon

⑦

ATC—Automatic temperature compensation

MTC—Manual temperature compensation

②

Measurement reading

⑧

Calibration indicator icon

③

Units of measurement

⑨

Auto. Hold icon of reading

④

Temperature units

⑩

Stability icon of reading

⑤

Indicator icon

⑪

Low battery icon

⑥

Temperature value and

indicator icon

- 5 -

3.2 Keypad functions

Short press ----- <2 seconds; Long press ----- >2 seconds.

Table - 1 Keypad operations and descriptions

Keypad

Operations

Descriptions

Short press

⚫Press to turn on or turn off the meter.

Short press

Long press

⚫Press to select parameter or unit:

pH100 pH meter: → → ；

EC100 conductivity meter: → →

PC100 pH/cond. meter: → → → → →

⚫Long press to enter the menu of parameter setup

Diagram - 1

- 6 -

3.3 Meter sockets

The meter sockets are protected by silicon caps, waterproof and dustproof, open the silicon caps

and connect the meter with the electrode.

Table - 2 Meter sockets

Model

Remarks

pH100

BNC socket (left) —connect pH electrode or ORP electrode

Φ2.5 socket (middle)—connect temperature probe

EC100

BNC socket (right)—connect conductivity electrode

Φ2.5 socket (middle)—connect temperature probe

PC100

BNC socket (left)—connect pH electrode or ORP electrode

Φ2.5 socket (middle)—connect temperature probe

BNC socket (right)—connect conductivity electrode

3.4 Display mode and other functions

3.4.1 Stable Reading Mode

When the measurement value is almost stable, smiley icon

appears on LCD, see Diagram - 2. If the smiley icon does not

appear or flash, please do not get the reading value or conduct

Long press

Short press

⚫In measurement mode, long press to enter calibration mode.

⚫Press to cancel operation, the meter returns to measurement mode or

the previous interface.

⚫When the measure value is locked-up, short press release lock-up.

Short press

⚫In measurement mode: press to turn on/off the backlight.

⚫In calibration mode: press to calibrate.

⚫In the parameter setup mode: press to enter and open the sub-menu,

confirm parameter.

Short press

Long press

⚫Under MTC (see Section 3.4.4), short press to change temperature, long

press for quick changing of the value.

⚫In parameter setup mode: press to select parameter.

Diagram - 2

- 7 -

calibration until the measuring value is stable.

3.4.2 Automatic Lock-up Display Mode

Select on from parameter P6.2 to turn on automatic lock-up

display function. When the reading value stabilizes more than 10

seconds, the meter locks the reading value automatically and

Displays HOLD icon, see Diagram - 3. In HOLD mode, press

to release lock-up. Diagram - 3

3.5 Other functions

3.5.1 Manual Temperature Compensation

When temperature probe is not connected, press or to change the temperature value,

long press for quick changing of the temperature value.

3.5.2 Automatic Power-off

The meter is with automatic power-off function. Select from parameter P6.4 to select automatic

power-off time: 10-20-30-off, i.e. user can select automatic power-off time to be 10 minutes, 20

minutes or 30 minutes (starting from the last operation). When Off is selected, the meter will not

turn off automatically.

3.5.3 Back-light

The meter is with white backlight, suitable for application even in dark environments. However,

when backlight is on, the consumption of the power will increase. Press to turn on/off the

backlight in measurement mode. Select from P6.3 to select lasting time for backlight: 1-2-3-Off, i.e.

select backlight lasting time to be 1 minute, 2 minutes or 3 minutes. When Off is selected, the

backlight will be turned on all the time.

3.5.4 Battery

The meter adopts 3xAA batteries. Please use LR6 alkaline battery to

ensure the battery quality. Battery life > 200 hours (without backlight).

When LCD displays icon, please replace with new batteries, see

Diagram - 4. Diagram - 4

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