Delmhorst Instrument Co CX-30 User manual

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Rev 2 - November 2023
CX-30 Owner’s Manual

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Rev 2 - November 2023
Contents
1. Introduction............................................................................................................................................3
2. Safety .......................................................................................................................................................4
3. Meter Features.......................................................................................................................................5
4. Menu Features .......................................................................................................................................7
5. Read Menu .............................................................................................................................................8
Material Selection and Correction..................................................................................................8
Live Reading Area ...............................................................................................................................9
Set Point...............................................................................................................................................10
Material Temperature ......................................................................................................................10
6. Set Menu.............................................................................................................................................. 12
Setting Selection................................................................................................................................12
Bluetooth® Indicator.........................................................................................................................12
7. Stats Menu ........................................................................................................................................... 14
Stats Selection ....................................................................................................................................14
Stats Details.........................................................................................................................................14
8. Applications......................................................................................................................................... 15
Delmhorst EDGE ™App Features ...................................................................................................... 18
Temperature Compensation Range (not operating temp) ...................................................18
Meter Range .......................................................................................................................................18
Power....................................................................................................................................................19
Size ........................................................................................................................................................19
Weight ..................................................................................................................................................19
Regulations/Compliance.................................................................................................................19
Dispose of your Meter......................................................................................................................20
For private households: Information on Disposal for Users of WEEE................................20
For professional users in the European Union..........................................................................20
For disposal in countries outside of the European Union .....................................................21
10. Meter Care, Service and Warranty ................................................................................................ 21
Care for your Meter ..........................................................................................................................21
Service Your Meter ...........................................................................................................................21
Limited Warranty...............................................................................................................................22

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1. Introduction
Thank you for purchasing the CX-30 cotton moisture meter, the latest in
Delmhorst’s legacy “C-series” conductance-type moisture meters, and one
of the new Navigator™family of meters. Delmhorst cotton moisture meters
are known throughout the major cotton-producing regions worldwide for
their unmatched reliability and ease of use.
The CX-30 offers the latest in features and functionality. It is packaged in a
robust and ergonomically designed ABS case (patent pending). The meter
has large, tactile buttons to provide a premium, tactile feel, and intuitive
user interface with dashboard-like display.
Together with the new Delmhorst EDGE™app, users can customize meter
settings and share MC data or graphs from any location quickly and
accurately.
The CX-30 carries a two-year limited warranty. REGISTER YOUR METER by
using the QR code on the back of the meter to receive an additional three
month’s warranty.
We recommend that you read the following pages in detail to take full
advantage of all the CX-30 has to offer.
Should you need assistance at any time, please contact us via email at
[e-mail], or by calling 877-DELMHORST (335-6467).

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2. Safety
Sharp Measurement Pins: The measurement pins on the external
electrodes are very sharp as they are intended to penetrate through
dense materials. Keep the electrode(s) in the carrying case when not in use
to avoid unintentional injury.
Meter Calibration: Meters are factory-calibrated prior to shipment.
Calibration should be checked periodically, using the internal Cal
Check feature or external MCS calibration standard to ensure the meter is
working correctly and electrically accurate.
Proper Use: When used properly, the CX-30 meter can help users
make informed decisions on the moisture levels of cotton and textiles
at the various stages of production. A moisture meter is a secondary
method of determining moisture content, and users should be aware of
other potential influences on the accuracy of conductance meter readings.

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3. Meter Features
Figure 1: Meter components

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1. Display –Easy to read, backlit LCD display.
2. Read Button –When in live reading mode, press this button to hold a
reading. When in any other mode, press this button to enter live
reading mode.
3. Navigation Buttons –Use the up/down/left/right buttons to navigate
through the meter’s display. Use the center button to confirm a
selection.
4. Easy Grip Handle –The handle is contoured to provide a comfortable
grip for right or left-handed users. This shape also allows for
increased leverage when pushing the meter into hard materials. The
battery door is located on the rear of the handle.
5. Ambient Light Sensor –When the backlight is set to Auto, the ambient
light sensor will trigger the backlight to turn on or off (to the
brightness level set by the user) according to ambient lighting
conditions.
6. Electrode Connector –Connect any external special application
Delmhorst electrode. Most common for cotton and textile
applications are the 52-E/C, 30-E/C, 37-E/C and 830-T.

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4. Menu Features
The Delmhorst CX-30 has three operating modes: Read, Set, and Stats. The
currently selected menu is marked with an underline. To change the menu,
press the up button until the menu underline is blinking. Then use the left
and right buttons to switch between menus. Use the down or center button
to enter the menu. When a line on the display (Material, Set Point, or
Material Temp) is bracketed by the solid black left and right arrows, it is
“active”, and that selection can be changed by pressing either the left or
right key.
Table 1: Menu Features
Read
Set
Stats
•Change species/
material type
•Take readings
•Change set point
•Change material
temperature
•Change pin type
•Cal check
•Bluetooth*
•Temperature unit
•Off Timer
•Backlight
ON/OFF/AUTO
•Backlight
brightness
•Screen contrast
•Total Readings
•Average value
•Highest value
•Lowest value
•Standard deviation
•View data
•Erase all reading
data

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5. Read Menu
Figure 2: Read screen components
1. Material Selection and Correction
Info: The CX-30 includes 4 material calibrations: Lint Cotton, Seed
Cotton, Viscose Rayon, and Wool. If desired, use the EDGE™app
to remove any of the 4 materials from the meter that are not being
used.
Use: Select the Read menu. While the underline flashes, press the down
button to enter the material selection text field. Press the left or
right buttons to scroll through available materials. Any changes to
the material selection field will NOT be saved until the center
button is pressed to confirm. When the material is changed, the
user will be asked if they want to erase the data in the meter.
Selecting NO will return the user to the original material and keep
all readings. Selecting YES will delete all saved readings within the
meter and change the material. If connected to the EDGE™app,
users will be prompted to export readings before they are deleted
from the app. Please see Delmhorst EDGE™App User Guide for
further instructions regarding exporting readings and changing
the available material calibrations in the CX-30.
1
2
3
4
5

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2. Live Reading Area
Info: The live reading area displays the moisture value (%MC) of the
selected material, corrected for Material Temperature (4) (see
Figure 2 above).
Indicated readings with a less than (<) or greater than (>) sign are
considered out of range. Out of range readings can be saved to
memory and exported but will not be used in stats calculations.
Use: Use the navigation buttons to move to the live reading area. Entry
will be confirmed when a live reading appears on screen. Tip: If a
live reading is not currently being displayed, pressing the Read
button will navigate to the live reading area.
Take a Reading: Attach the appropriate electrode to the meter
and make contact with the material being tested. (see Application
section below) The moisture content of the material will appear in
the live reading area.
Hold a Reading: Press the Read button to hold the reading on
screen. HOLD will appear in the material selection line and the
meter will beep. A held reading can be saved, if desired (see
below). Saving a reading or pressing the Read button a second
time will return the meter to live reading mode.
Save a Reading: Press the Center button to save a live or held
reading. This will store the reading, material temperature, and pin
correction type to meter memory. A ‘Saved’ message will appear
followed by the memory slot which the reading occupies (ex. Lint
Cotton 2/100). This message can be bypassed by pressing the
Read button.

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Memory: There are 100 memory slots available in the meter. As
readings are saved, the memory slots will fill in order from lowest
(1) to highest (100). After 100 readings are stored, newly saved
readings will replace the oldest stored readings. Unlimited
number of readings may be saved when connected to the app.
3. Set Point
Info: The Set Point is the user-selectable %MC level at which the alarm
will sound. This feature allows users to quickly take readings
without having to review each one individually, helping to quickly
identify high moisture areas.
Use: When active, press the left and right buttons to adjust the Set Point
down or up. Holding the left or right buttons will cause the Set
Point to change more rapidly.
The Set Point alarm can be turned off by adjusting the set point
value to zero (---).
When changing the active material of the meter, the Set Point will
reset to the default values for the new material, with one exception.
If the Set Point has been turned off (---), it will remain off for the
new material.
4. Material Temperature
Info: The basic calibration of the meter assumes the cotton temperature
to be 70°F. The material (cotton) temperature will typically be
equivalent to the ambient temperature of the environment, unless
you are testing bales or material from the dryer. As the
temperature increases, the indicated moisture content will
increase above the actual moisture content. Lower material
temperatures result in a lower indicated moisture content. For
best accuracy, use the temperature correction in the meter,

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especially when working in extreme environments (outside 50-
90°F or 10-32°C) and environments subject to temperature
variation.
Use: When active, press the left and right buttons to adjust the Material
Temperature down or up. Holding the left or right buttons will
cause the temperature to change more rapidly.

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6. Set Menu
Figure 3: Set screen components
1. Setting Selection
The setting selection area will display all settings in a scrollable list. Each
setting is listed and explained in Table 2 below. Press the left and right
buttons to view settings. After locating the desired setting, press the
down or center button to enter the setting state. Then press the Read
button to enter the live reading screen.
2. Bluetooth® Indicator
The CX-30 is equipped with Bluetooth®technology, allowing users to
connect their meter(s) to a mobile device (smartphone or tablet). The
Bluetooth®icon is visible on all meter screens when turned on. Please
refer to the Delmhorst EDGE™App User Guide for more information.
Table 2: Settings options
Setting
Description
Cal Check
•Allows users to check the electrical calibration of the
meter
1
2

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•A value between 11.8 and 12.2 means the meter is
in calibration
•A value of <11.8 or >12.2 means the meter is out of
calibration –change the batteries (2 x AA alkaline)
Bluetooth®
•When Bluetooth is on but not connected, the
Bluetooth symbol will be on screen and flashing
•When Bluetooth is on and connected, the Bluetooth
symbol will be on screen and solid
•When Bluetooth is off, no symbol will be visible on
screen
•Factory default is off
Temperature Unit
•Changes the temperature unit between Fahrenheit
and Celsius
•Factory default is Fahrenheit
Off Timer
•Chose 1, 4, or 10-minute screen off timer
•Factory default is 1 minute
•Manually turn the meter off by depressing the center
button until screen goes blank –approx. 3s
Backlight
•Turn backlight ON to enable, and OFF to disable
•Turn the backlight ON when in low ambient light,
and OFF when in bright ambient light
•When set to AUTO, meter will automatically enable
and disable backlight according to ambient light
•Factory default is off
Brightness
•Adjust backlight brightness from 1 (low) to 10 (high)
•The selected brightness level will be used whenever
backlight is enabled (ON or AUTO)
•Factory default is brightness level 2
Contrast
•Adjust the contrast level of the screen from 1 (low)
to 10 (high)
•Factory default is contrast level 5

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7. Stats Menu
Figure 4: Stats screen components
1. Stats Selection
The stats selection area will display all statistics in a scrollable list (see
Table 3 below). Press the left and right buttons to view statistics.
2. Stats Details
Statistics are calculated from the list of saved readings in meter memory,
and only readings taken within the valid measurement range of the
selected material are used for the calculations. Out of range readings
are indicated as “<xx.x or >xx.x” and will not be included in statistical
calculations for average and standard deviation.
The meter provides statistics (average, high, low, standard deviation) for
the readings that are currently stored in the meter.
1
2

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The stats details section can only be selected for the ‘View Data’ and
‘Erase Data’ options. For these two cases, press the down or center
buttons to enter the stats details box from stats selection. Use the left
and right buttons to scroll the list of latest readings or select the desired
option for clearing readings. For all other statistics, stats details will
simply reflect the details of the above statistic and cannot be selected.
Table 3: Available Stats
8. Applications
The moisture content of the samples under test is the primary factor
affecting meter readings. However, readings are also affected by the
following:
Type of cotton, area where it is grown, impurities, compaction (density)
around the electrode, temperature of the sample.
To minimize the effect of these factors and improve the repeatability of
the meter readings, keep in mind the following points: Use samples with
Statistic
Description
Readings
•Displays the total number of readings stored in the
meter
Average
•Displays the average value of the saved readings.
High
•Displays the highest value of the saved readings.
Low
•Displays the lowest value of the saved readings.
Standard
Deviation
•Displays the standard deviation of the saved
readings.
View Data
•Displays a list of all saved readings. The %MC and
temperature of each reading are displayed.
Erase Data
•Clears all saved readings and statistics from the
meter.

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minimum of impurities. Optimal accuracy may be obtained if meter
readings are checked against %MC by means of properly run oven tests
on the product being tested.
Testing Lint Cotton and Seed Cotton
Attach the 52-E/C Sample Cup Electrode to the connector on top of the
meter. Select material - either Lint or Seed Cotton. Set the material
temperature correction. Select the set point. Place the material in the
sample cup. Press the cotton firmly into the cup with your finger. The
sample in the cup should be overflowing during the test, even while you
are pressing it with your finger. The meter will display the %MC.
Readings below 4% lint cotton will be displayed as a flashing “<xx.x”.
Readings above 16% lint cotton will be displayed as a flashing “>xx.x”.
Both the under range and overrange readings should be disregarded.
They will not be added to the accumulated readings or used in calculation
of the average.
Tests made on seed cotton may not be as accurate as those made on lint
cotton. This is due to the fact that the seed cotton sample is made up of
lint and seed, and the quantity of seed may vary from sample to sample.
Also, the moisture content of the seed is usually higher than that of the
lint. When testing seed cotton, direct contact is still made with the cotton
fiber only and not with the seed of the sample. Variables in quantities and
moisture content of the seed, during calibration and in field tests, may
affect the accuracy and repeatability of the meter readings.
The seed cotton scale gives an indication of “total” moisture content (the
moisture content of the seed and the lint in a sample as determined by
oven tests) in the seed cotton sample. This may be of interest only in
buying and selling seed cotton where some consideration may be given
to the weight relationship between moisture content and dry matter.

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Testing Baled Cotton
Attach the 30-E/C Electrode to the connector on top of the meter. Slide
the plastic spacer over the #491 contact pins from the bottom of the pins,
mount the pins in the chucks and tighten the set screws. (The #491
contact pins are not inserted into the chucks for shipping purposes).
Select material - either Lint or Seed Cotton. Set the material temperature
correction. Select the set point. Insert the electrode pins into the bale.
Place the pin spacers near the tips of the pins when contact is first made
with the bale. This helps to keep the pins parallel as they are forced into
the bale. The meter will display the %MC.
The #491 contact pins are insulated, except for 1-3/4” at the tip. The
insulation helps to identify the area of moisture, since the reading is
obtained from the tip of the pin. Keeping track of moisture readings as
the pins are pushed into the bale will give an idea of the uniformity of
moisture distribution in the bale. Higher moisture readings near the
surface are an indication that the cotton has been exposed to higher
moisture after baling. The CX-30 gives accurate results on normally
compressed bales. If the bale is loosely packed, the meter will read lower
than the actual moisture content. If the bale is very tightly packed, the
readings will be only slightly higher than normal. Well-conditioned
material will give uniform readings; however, material that is baled before
it is dry will show a wide range of moisture content. Several tests should
be made on each bale, and using the Stats function in the meter, note the
average and the highest readings of these tests.
Note: The heavy duty 830-T electrode is also available for bales and
modules.
Testing Wool, Viscose Rayon
Connect the 37-E/C multi-pin electrode to the connector on top of the
meter. Set the scale to Wool or Viscose Rayon. Select a set point. Set the
material temperature correction. Insert the electrode pins into the
material. The meter will display the %MC.

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Delmhorst EDGE ™App Features
The Delmhorst EDGE™app expands upon many features found within the
CX-30. These features include:
1. Export full data sets or selected readings from meter to app to be
viewed on a single page and further analyzed.
2. Exclude extraneous readings from Statistics calculations.
3. View a customizable plot of all readings.
4. Export readings from app to spreadsheet for long term storage and
analysis.
5. Change the materials available in the CX-30 meter.
6. Adjust the moisture values at which the LEDs change colors.
7. Upgrade meter firmware.
Please refer to the Delmhorst EDGE™App User Guide for more details on
how to connect the meter to the app and a detailed explanation of the
features mentioned above.
Specifications and Operating Conditions
Temperature Compensation Range (not operating temp)
0-255 °F / -18-124 °C
Meter Range
Lint Cotton: 4%-16%
Seed Cotton: 6%-20%
Viscose Rayon: 6%-25%
Wool: 12%-30%

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Power
2x AA Alkaline Batteries
Battery life while using the meter in reading mode and active LED’s is
estimated at 125-150 hours. A combination of alarm, backlight and
Bluetooth will reduce expected life to a minimum of 35 hours. A “LOW
BATT” warning will appear on screen when the meter is woken up if battery
voltage is below 1.75V. At this level the meter has 1-2 hours of life
depending on the functions being used. The same alert is sounded and
displayed every 5 minutes. Continued use with a low battery may cause
your meter to go out of calibration. TIP: Extend battery life by turning
Bluetooth® off when not in use, setting the backlight brightness low, and
using shorter timeout settings.
Size
8.6 in x 2.9 in x 1.6 in (22 cm x 7.4 cm x 4.1 cm)
Weight
6.9 oz (0.20 kg) without batteries
8.6 oz (0.24 kg) with batteries
Regulations/Compliance
WEE, RoHS, CE

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Dispose of your Meter
Figure 5: WEEE symbol –crossed out wheeled bin
For private households: Information on Disposal for Users of WEEE
This symbol (figure 5) on the product(s) and / or accompanying
documents means that used electrical and electronic equipment (WEEE)
should not be mixed with general household waste. For proper treatment,
recovery, and recycling, please take this product(s) to designated
collection points where it will be accepted free of charge. Alternatively, in
some countries, you may be able to return your products to your local
retailer upon purchase of an equivalent new product.
Disposing of this product correctly will help save valuable resources and
prevent any potential negative effects on human health and the
environment, which could otherwise arise from inappropriate waste
handling.
Please contact your local authority for further details of your nearest
designated collection point.
Penalties may be applicable for incorrect disposal of this waste, in
accordance with your national legislation.
For professional users in the European Union
If you wish to discard electrical and electronic equipment (EEE), please
contact your dealer or supplier for further information.