Terra Universal Smart IsoDry Nitro-Watch Installation guide

Installation and Operating Guide Document No. 1800-19
Smart® IsoDry® Nitro-Watch™ System
© Copyright 2021 Terra Universal Inc. All rights reserved.
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
2
Table of Contents
1. GENERAL INFORMATION ................................................................................................................................ 3
1.1 DESCRIPTION ...................................................................................................................................................4
1.2 OPERATION......................................................................................................................................................4
1.3 PART NUMBERS COVERED BY THIS MANUAL ...........................................................................................................4
2. SAFETY.......................................................................................................................................................... 5
3. START-UP ...................................................................................................................................................... 6
3.1 INSTALLATION FOR DESICCATOR AND GLOVE BOX ...................................................................................................6
3.2 BATTERY INSERTION ..........................................................................................................................................7
3.3 INITIAL PROGRAMMING .......................................................................................................................................7
3.3.1 System Configuration Menu .........................................................................................................................8
3.4 STAND-BY DISPLAY ...........................................................................................................................................9
3.5 DATA TRANSFER.............................................................................................................................................10
4. SPECIFICATIONS.......................................................................................................................................... 11
5. TESTING ...................................................................................................................................................... 12
6. TROUBLE SHOOTING ................................................................................................................................... 12
7. REPLACEMENT ORDERS .............................................................................................................................. 13
8. REPLACEMENT PARTS................................................................................................................................. 13
9. WARRANTY.................................................................................................................................................. 14

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
3
1. General Information
The Smart® IsoDry® Nitro-Watch™ senses and displays the relative humidity level (from ambient to 0%) inside a desiccator
or glove box within ±1.5% RH. It operates in tandem with the Dual Purge System and Automatic RB Valve to precisely and
automatically control the flow of nitrogen into the desiccator, or glove box, and maintain a preset humidity level, no matter
how operating conditions may change. The Nitro-Watch™ consists of a humidity sensor and a controller unit. This system
also logs RH, temp, door open/close, purge on/off, and sensor removal/ attachment. The system can log months of data
depending on the logging interval selected, all of which can be downloaded to a USB flash drive.
Note: This manual focuses on specific setup and operating instructions for the Smart® IsoDry® Nitro-Watch™ Control
system. For installation instructions and general specifications for these products please see below:
Adjust-A-Shelf™ Cabinet or Dual Purge
Doc. #1800-40: Desiccators and RH Controllers
IsoDry® desiccator
Doc. #1788-26 IsoDry® RH Control System
GloveBox
Doc. #1800-42 Series 100 GloveBox
Nitro-Watch™ Sensor
Nitro-Watch™ Controller

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
4
1.1 Description
The Smart® IsoDry® Nitro-Watch™ interface includes four physical buttons (ESC, Up arrow, Down arrow, SET) to
navigate and change data with an eight character 14-segment LED display. The connectors for the system are:
-RH sensor: phone-jack
-Door Switch: phone-jack
-Purge Control: phone-jack
-Data log transfer to thumb drive: USB
LED light status indicator shows data logging and transfer status:
•LED light is off: there is no activity
•LED light is blinking red at the user defined interval: the system is logging data
•LED light is rapidly flashing green: data is being transferred to the USB flash drive from an internal SD card.
•LED light is rapidly blinking blue: there is no space available on the USB flash drive.
1.2 Operation
The Nitro-Watch™ controller receives the RH/temperature reading from the Nitro-Watch™ RH sensor and displays
current RH%, RH alarm (RH high or RH low alarm), door alarm, and RH% set point. The controller regulates the solenoid
valve by sending an ON/OFF signal to the IsoDry® Dual Purge based on the door, or RH status, determined by the user
settings inputted to the Nitro-Watch™ and Dual Purge.
The humidity sensor is mounted inside the desiccator or glovebox. It uses a fast-response capacitive probe whose
capacitance is proportional to the humidity level. The sensor is capable of measuring humidity over the entire humidity
range, from 0 to 100% RH, with an accuracy of ± 1.5% RH at a temperature of 68 degrees F.
1.3 Part Numbers Covered by this Manual
9500-06A
Smart® IsoDry® Nitro-Watch™ Controller for Desiccator
Cabinets
9500-06A-GB
Smart ® IsoDry® Nitro-Watch™ Controller for Gloveboxes
9500-02B
IsoDry® Nitro-Watch™ Sensor for Desiccator Cabinets
9500-02B-GB
IsoDry® Nitro-Watch™ Sensor for Gloveboxes
Nitro-Watch™ attached to a Desiccator
Nitro-Watch™ attached to a GloveBox

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
5
2. Safety
Critical Operating Conditions
-Because the humidity sensor is exposed to moisture during shipping, the system must generally operate for a
couple of days in a dry Nitrogen environment before the sensor dries out and delivers completely accurate
readings.
-Never use this equipment with gases that are non-compatible with the materials of the construction. This may
cause damage to equipment or injury to personnel.
-This instrument contains electronic components that are susceptible to damage by static electricity. Proper
handling procedures must be observed during the removal, installation or other handling of internal circuit boards
or devices.
-Do not release toxic or flammable gases in the vicinity of personnel. Be sure that venting and disposal methods
are in accordance with Federal, State and local requirements.
-If toxic or flammable gases are used with this equipment, emergency equipment applicable to the gases in use
should be available in the operating area.
-Sensors and controllers are factory calibrated to operate at the pressures specified with the order. Attempts to
operate them under conditions different than ordered may result in less than desirable performance or may cause
the unit to fail to function.
-The air must be completely turned off before any adjustments are made to the controller or else the readings will
be inaccurate.
-The Nitro-Watch™ draws its power from the Dual Purge System and will not operate unless the Dual Purge
System is plugged in and turned on.
Proprietary Notice
Safety Notice
This manual pertains to proprietary devices manufactured by
Terra Universal, Inc. Neither this document nor any portion
of it may be reproduced in any way without prior written
permission from Terra Universal.
A thorough familiarity with all operating guidelines is essential to safe operation of
the product. Failure to observe safety precautions could result in poor
performance, damage to the system or other property, or serious bodily injury or
death. The following symbols are intended to call your attention to two levels of
hazard involved in operation.
Terra Universal makes no warranties applying to information
contained in this manual or its suitability for any implied or
inferred purpose. Terra Universal shall not be held liable for
any errors this manual contains or for any damages that
result from its use.
CAUTION
Cautions are used when failure to observe instructions could result in
significant damage to equipment.
WARNING
Warnings are used when failure to observe instructions or precautions
could result in injury or death.
The information presented here is subject to change without notice.

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
6
3. Start-Up
-The controllers should be located in a clean dry atmosphere relatively free from shock and vibration.
-Leave sufficient room for access to the electrical components and install in a manner that permits easy removal if
the instrument requires cleaning.
-Contamination or corrosion may occur when used with reactive gas as a result of plumbing leaks or improper
purging.
-These controllers should only be used with inert gases like Nitrogen and Argon.
3.1 Installation for Desiccator and Glove Box
1. Use ¼” tubing to connect the Internal Pressure inlet and Gas Out port to the desiccator/glovebox.
2. Use a low-voltage phone cable to connect the two ports labeled “Purge Control” on the Nitro-Watch™ and
Dual Purge.
3. Use another low-voltage phone cable to connect the Nitro-Watch™ “Door Sensor” port to the desiccator –
not applicable for Glovebox.
4. Use a third low voltage phone cable to connect the Nitro-Watch™ RH Sensor port to the matching port on
the desiccator/GloveBox.
5. Connect the nitrogen supply to the Gas In port on the Dual Purge using ¼” tubing.
6. Use the power supply cable to connect the Dual Purge to a 120VAC outlet.

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
7
3.2 Battery Insertion
The Smart® IsoDry® Nitro-Watch™ uses a CR2032 coin cell battery to keep time while power to the system is off. The
battery needs to be added to the circuit board before system start up. If no battery is present the system will not keep
time when the system is powered off and the system time will need to be set again when the system is turned on.
Follow the steps below to install the battery:
1. Unfasten the screws on both sides of the Nitro-Watch™ Controller to remove the cover.
2. Remove the cover to expose the circuit board.
3. Insert the battery into the battery holder.
4. Reattach and secure the cover over the circuit board.
5. Begin System Configuration process.
3.3 Initial Programming
Note: When the system starts-up in Nitro-Watch™ mode “TERRA UNIVERSAL NITROWATCH” will scroll across the
display screen. When in HUMEX mode “TERRA UNIVERSAL HUMEX” will scroll across the display screen.
Press and hold the SET button while turning on the system power through IsoDry® Nitro-Watch™ system to
navigate to “System Configuration Mode.”
Press the UP or DOWN arrow to navigate through the system menu.
Press the SET button to accept the values.
Press the ESC button to clear the inputted value for the current menu item back to default and return to the
previous menu item.
Note: HUMEX mode would provide inline humidification of nitrogen or other process gas being fed into the desiccator
or glovebox from ambient to 100%. Do not alter this setting from the factory default unless you are trained to do so.

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
8
3.3.1 System Configuration Menu
Display
Description
Function
Unit
Default
Active Keys
DR ALARM
Door Open
Alarm Delay
(Door Sensor
Only)
The number of seconds the door remains
open before the alarm.
Seconds:
0-255 10 UP/DWN to increment/decrement sub-menu values
SET to accept values and jump back to main menu
DR DELAY
Door Delay
(Door Sensor
Only)
The number of seconds to activate the
purging after the door is open.
Seconds:
0-255 0 UP/DWN to increment/decrement sub-menu values
SET to accept values and jump back to main menu
RH ALARM RH Purge
Alarm Delay
The number of seconds the RH level must
remain above (or below for HUMEX mode)
the set point to activate the alarm.
Seconds:
0-255 10 UP/DWN to increment/decrement sub-menu values
SET to accept values and jump back to main menu
BEEP
Beeper Used
for Alarms
Alarm X ON UP/DWN to toggle between ON/OFF
HUMEX Humex Mode
"OFF” maintains below ambient humidity
(standard Nitro-Watch™ functionality). “ON”
maintains above ambient humidity.
X OFF UP/DWN to toggle between ON/OFF
RH CAL RH Calibration
Turn ON/OFF the calibration algorithm for
the humidity sensor calculation.
Note: the Nitro-Watch™ sensor operates at
an accuracy of ±1.5% RH without any
calibration required. However calibration
may be performed using the calibration
settings if the user wishes to calibrate based
on a reference device.
X OFF UP/DWN to toggle between ON/OFF
A Calibration
Parameter
-These parameters are coefficients and
intercepts for an equation to calibrate the
RH sensor’s readings and compensate for
measured discrepancies. If RH
CALIBRATION is ON, allows cubic
equations for A term.
-If OFF, then skip.
(-99.99999,
+99.99999) 0
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to increment/decrement within each digit
SET to save and move to the next digit
SET after last digit to save and move to next menu
item
ESC to cancel action and jump back to sub-menu
#1
B Calibration
Parameter
-These parameters are coefficients and
intercepts for an equation to calibrate the
RH sensor’s readings and compensate for
measured discrepancies. If RH
CALIBRATION is ON, allows cubic
equations for B term.
-If OFF, then skip.
(-99.99999,
+99.99999) 0
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to increment/decrement within each digit
SET to save and move to the next digit
SET after last digit to save and move to next menu
item
ESC to cancel action and jump back to sub-menu
#1
C Calibration
Parameter
-These parameters are coefficients and
intercepts for an equation to calibrate the
RH sensor’s readings and compensate for
measured discrepancies. If RH
CALIBRATION is ON, allows the user to set
the cubic equations for C term.
-If OFF, then skip.
(-99.99999,
+99.99999) 0
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to increment/decrement within each digit
SET to save and move to the next digit
SET after last digit to save and move to next menu
item
ESC to cancel action and jump back to sub-menu
#1
D Calibration
Parameter
-These parameters are coefficients and
intercept for an equation to calibrate the RH
sensor’s readings and compensate for
measured discrepancies. If RH
CALIBRATION is ON, allows the user to set
the cubic equations D term.
-If OFF, then skip.
(-99.99999,
+99.99999) 0
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to increment/decrement within each digit
SET to save and move to the next digit
SET after last digit to save and move to next menu
item
ESC to cancel action and jump back to sub-menu
#1

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
9
System setup is complete.
3.4 Stand-By Display
•RH reading from sensor.
•RH alarm (high or low depending on Nitro-Watch™ vs. HUMEX mode).
•Door alarm (if door is open).
1. Press SET button to see the RH% set-point number.
2. Use the Up or Down arrow to increase or decrease set point.
3. Press SET again to save the new set point value.
4. Display will show the current RH% after new value is set.
Note: Press ESC button to temporarily deactivate the alarm beeping sound. The screen will still show the alarm is
active, but the sound will be muted.
Note: If the sensor is disconnected during operation, the system will trigger the alarm sound and the “NoSensor” will
display on the screen.
Display
Description
Function
Unit
Default
Active Keys
DATA LOG
Data Logging
Interval
(SD card logs
humidity only
and door open
or closed
events must be
logged as they
occur.)
The time interval at which data is logged to
the system’s memory. For example, data
logging set at 10 means the data will be
logged every 10 seconds.
1 SEC, 10
SEC, 30
SEC, 1 MIN,
5 MIN, 1
HOUR
1 MIN
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to toggle between allowed values
SET key to accept values and jump to main menu
ESC to cancel action and jump back to sub-menu
#1
DATE FMT Date Format The format in which date is inputted and
logged in data logging. DMY/MDY MDY
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to toggle between allowed values
SET to accept values and jump to main menu
ESC to cancel action and jump to main menu
SET DATE Input Date
The user inputs the current date, in the
format selected from the date format menu
option. Display will show “MM.DD.YYYY”
as default. Underscore “_” indicates the
current field selected for input i.e.
“12._M.YYYY”
MM.DD.YYYY MM.DD.YYYY
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to toggle between allowed values
SET to move from one field to the next (i.e. MM to
DD)
SET to accept values after last field and jump to
main menu
ESC to cancel action and jump to main menu
SET TIME Input time in 24
hour format
The user inputs the time in 24 hour format.
Display will show “HH:MM” as default.
Seconds are always assumed to be 00
when entering a time.
HH:MM HH:MM
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to toggle between allowed values
SET to move from one field to the next (i.e. HH to
MM)
SET to accept values after last field and jump back
to main menu
ESC to cancel action and jump to main menu
TEMP Temperature
Units The units in which temperature is logged. C/F F
UP/DWN to navigate within sub-menu #1
SET to jump to sub-menu #2
UP/DWN to toggle between allowed values
SET to accept values and jump to main menu
ESC to cancel action and jump to main menu

Installation and Operating Guide
Smart® IsoDry™ Nitro-Watch™
© Copyright 2021 Terra Universal Inc. All rights reserved. • Document No. 1800-19
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: [phone] • FAX: [phone]
10
3.5 Data Transfer
The data file size for the Smart® IsoDry® Nitro-Watch™ is approximately 4 MB or 113,000 readings. This is
approximately 32 hours of data when logging at a 1 second interval, 2 weeks of data at a 10 second interval, 6 weeks
of data at a 30 second interval, or 12 weeks at a 1 minute interval. The Smart® IsoDry® Nitro-Watch™ logs RH, temp,
door open/close, purge on/off, and sensor removal/ attachment. The system can log months of data depending on the
logging interval selected. When the system reaches the 4MB limit, the data will begin to wrap and overwrite the oldest
data with the new data. Data can be saved onto a USB flash drive without third party software – follow the steps below
to complete the transfer:
1. Plug in a USB drive – data is automatically copied over in CSV format. The LED status light will rapidly
blink green during data transfer.
2. Do not remove the USB drive during data transfer.
3. Complete transfer of the 4 MB data file takes approximately 2.5 minutes. The LED status light will stop
blinking green when data transfer is complete.
4. There will be a new file called EVENTLOG.CSV on the USB drive. If that file already exists on the USB
drive, it will be overwritten.
The Smart® Nitro-Watch™ is compatible with most USB 1.0, 2.0, and 3.0 thumb drives.
Note: The system does not log data while transferring data to the USB drive.
Data Format
The data file from the Smart® IsoDry® Nitro-Watch™ contains the following columns:
A. Date
B. Time
C. % RH, or event name
D. Temperature, or event status
E. Temperature Units (C or F)
Example of data table