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InTemp CX405 RTD Dry Ice Logger Manual 

1-508-759-9500 (U.S. and International) 5 

www.onsetcomp.com 

1-800-LOGGERS (U.S. only) 

privileges must create a new profile for a CX400 logger and set 
the Daily Checks to Once Daily or Twice Daily. For details on 
managing profiles, see www.intempconnect.com/help. 

Note: 

Changes to the Record CX400 Logger Checks setting will 

take effect the next time the logger is configured. Also, when 
this setting is enabled, the minimum and maximum values 
displayed on the logger LCD represent the minimum and 
maximum readings within the current 24-hour periods and will 
reset every 24 hours. Otherwise, if this setting is not enabled, 
the minimum and maximum values represent the entire logging 
period and only reset when the logger is downloaded and 
restarted or stopped and reconfigured (they will not reset if you 
download the logger and continue logging). 

To perform a check: 

1.

 

Tap the Devices icon and connect to the logger. 

2.

 

Tap Perform (Morning, Afternoon, or Daily) Check. 

Once a check is completed, it is recorded as a logged user 
action along with the user email and the location, and is 
available for view in reports. The action is also listed as 
performed in the Connected screen and a checkmark will 
illuminate on the logger LCD. 

You can also set up a notification to display on your phone or 
tablet to remind you to perform a check. Use the Reminders 
option under Settings in the InTemp app. 

Logger Events 

The logger records the following events to track logger 
operation and status. These events are listed in reports 
downloaded from the logger. 

Event Name 

Definition 

Started 

The logger started logging. 

Stopped 

The logger stopped logging. 

Downloaded 

The logger was downloaded. 

Probe Alarm 
Tripped/Cleared 

A probe temperature alarm has tripped or 
cleared because the reading was outside the 
alarm limits or back within range. 

Performed/Missed 
Check 

The user performed or missed the daily, 
morning, or afternoon logger check. 

Safe Shutdown 

The battery level dropped below 1.85 V; the 
logger performs a safe shutdown. 

Deploying the Logger 

Use the four magnets on the back of the logger case to mount it 
to a magnetic surface. 

The external probe cable has a protective sheath. Move the 
sheath as needed to position it where the cable will be 
protected during shipments from inadvertent cuts. 

Protecting the Logger 

The logger is designed for indoor use and can be permanently 
damaged by corrosion if it gets wet. Protect it from 
condensation. If the logger gets wet, remove the battery 
immediately and dry the circuit board. 

Note:

 

Static electricity may cause the logger to stop logging.

 

The logger has been tested to 8 KV, but avoid electrostatic 

discharge by grounding yourself to protect the logger. For more 
information, search for “static discharge” on onsetcomp.com. 

Battery Information 

The logger requires two user-replaceable AAA 1.5 V alkaline or 
optional lithium batteries for operation at the extreme ends of 
the logger operating range. Expected battery life varies based 
on the ambient temperature where the logger is deployed, the 
frequency of connecting to the phone or tablet and 
downloading reports, the duration of audible alarms, and 
battery performance. New batteries typically last 1 year with 
logging intervals greater than 1 minute. Deployments in 
extremely cold or hot temperatures or a logging interval faster 
than 1 minute can impact battery life. Estimates are not 
guaranteed due to uncertainties in initial battery conditions and 
operating environment. 

Note:

 Make sure the batteries installed have flat negative 

terminals. There should be no indent in the bottom of the 
batteries. Batteries with indents in the negative terminals may 
become loose and prevent proper operation. 

 

To install or replace the batteries: 

1.

 

If the battery door is already installed on the back of the 
logger, use a Phillips-head screwdriver to remove it. 

2.

 

Remove any old batteries. 

3.

 

Insert two new batteries observing polarity. 

4.

 

Screw the battery door into place. 

 

WARNING:

 Do not cut open, incinerate, heat above 85°C 

(185°F), or recharge lithium batteries. The batteries may 
explode if the logger is exposed to extreme heat or conditions 
that could damage or destroy the battery case. Do not dispose 
of the logger or batteries in fire. Do not expose the contents of 
the batteries to water. Dispose of the batteries according to 
local regulations for lithium batteries. 

 

 

 

 

 

 

 

 

Only use batteries 
with flat negative 
terminals 

Do not use batteries with an 
indent in the negative terminal 

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