1. Product Description
The HOTBOX HTH was developed to record conditions during various foodstuffproduction procedures: belt drying (pasta production), lyophilisators and dryingchambers.
Further applications are drying procedures in the ceramic industry and in brickworks.
The robust and stabile construction of the aluminium housing and the sturdy sensorprotection guarantee that the HOTBOX HTH will survive a fall of 1 meter onto ahard surface.
The HOTBOX HTH datalogger is a battery-operated, self-contained data recordingunit.
The integrated sensor logs the ambient temperature (-35°C. +95/105°C) and the airhumidity (0%. 100% r.H.). An additional external temperature probe (-50°C. +140°C)can be connected to the HOTBOX HTH using a 5 pin BINDER connector(see chapter 5).
The unit has an internal memory capacity for 64,000 measured values. The mode ofmeasurement (loop or start-stop memory) and the measurement interval (1s to 3h)can be defined with the software.
Data evaluation and datalogger programming is done with the elproLOG PC software.
The HOTBOX HTH is delivered with a calibrated, long-time stable rF/T probe.
Depending on the specific mode of application we recommend you return thedatalogger to the manufacturing company for calibration / adjustment after 6 to 12months.
3.6V lithium battery with large temperature range. The user can replace the batteryhimself without any problems.
Refer to chapter 2 Applications and Safety Regulations for more information aboutthe operative range of the battery and the battery replacement procedure.
2. Applications and Safety Regulations
2.1 Operating Temperatures
- The loggers can be used in the temperature range between -40°C and +95°C and peek temperatures up to
- Battery self-discharging increases at temperatures exceeding 45°C and continuous operation at tempera-
tures above 45°C can reduce the serviceable life by approx. 1/3.
- Lithium battery passivation, due to long-term use at temperatures above 40°C, can result in temporary
read problems (self-discharge protection). This can be rectified by repeated evaluation.
- Long-term use at low temperatures down to -40°C does not present any problems.
- We can not guarantee that the logger will always function properly if it is implemented at temperatures
below -40°C. Experience has shown that the battery freezes at approx. -50°C, that it is no longerpossible to perform measurements and that the timer tracking function can be temporarily interrupted.
To make further operation possible, the logger must be reprogrammed when room temperature isreestablished.
2.2 Exceptional Environmental Conditions
Pay attention to the following when loggers are used under exceptional environmental conditions:
- A vent hole should be drilled at negative pressures of <0.4 bar abs.
- There is a risk that the battery may explode if the logger is used in conjunction with microwaves
2.3 Precautionary Measures for Handling Units with Lithium Batteries
- Do not short-circuit batteries: Danger of explosions
- Do not throw units which contain batteries into fire: Danger of explosions
- Do not subject the batteries to mechanical stress and do not dismantle them. The leaking battery fluid
is highly corrosive and lithium can generate severe heat when it comes into contact with moisture or itcan ignite fire.
- Do not heat up battery-driven units to temperatures exceeding 110°C: Danger of explosions- Follow the manufacturer’s specifications for battery storage- Return the batteries to the supplier for correct waste disposal
HOTBOX HTH data loggers require an evaluation software of version 2.05 or higher.
To ensure proper functioning of the logger the following steps should be part of a periodical
- Readout of the data logger and saving the file
- Battery replacement (Part No 2820, set of 2, storage time 5 years; Lithium 3.6V, 1900mAh,
AM3/LR6/AA). At room temperature battery life time is appoximately 2 years.
After the battery has been replaced, the function „Programming of battery change time“ in menu item
„Extended Setup“ has to be executed.
2.6 Error Message - Logger Status in elproLOG Win
RAM IMG-BMP destroyed
This error message is visible in the logger status information, line: Module time. The reason for such
an error message might be, a battery replacement where the battery change time has not been set.
2.7 Technical Alterations
In the interest of our customers, we reserve the right to perform alterations resulting from subsequent
technical developments without any particular notice. For this reason, diagrams, descriptions and the
information concerning the scope of delivery are not binding.
- This product must be certified with CE- The manufacturer guarantees that this product complies with the relevant recommenda- tions
3. Settings in elproLOG
Those settings should not be change for a proper operation of the datalogger:• Datenlogger Setup - Sensors - 1 (T + rH)
• Extended Setup - Displaymode / Powersave - on
4. Definition of Alarm Parameters
The Hotbox HTN is equipped with limit value supervision. These values are defined in the „Setup of AlarmParameters“ window.
Any limit value violation is shown in the measurement graphic and table. Also the limit value violations maybe printed out as an alarm protocol.
5. Pin Assignment and Connection Diagram
Wire the 5pin BINDER connector for the HOTBOX HTH as shown below:
6. Measurement- Operating-Ranges and Accuracy
Relative Air Humidity Measurement
At room temperature, 23°C: ± 1.5%rHHysteresis 10-90-10%rH: <1%rH
rH/T Sensor; Internal
-35°C. 95°C (permanent operation)-35°C. 105°C (temperature peeks)0%. 100%rH, with condensation
Save operation area of the rH/Tsensor 3087-B for extendedtemperature applicationcorresponds to the plot shown.
105°C for temperature peeks,permanent operation 95°C only.
7. Accessories / Spare Parts / Service
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