The THT-LCD is a handheld humidity datalogger with an external humidity and temperature probe and a liquid crystal display. Both Relative Humidity and Dew Point can be displayed and logged. There are two external Humidity/Temperature probes available for the THT-LCD.
The HT11-Probe uses a Sensirion SHT11 digital humidity sensor giving ± 3.5%RH accuracy from 10%RH to 90%RH.
The HT15-Probe uses a Sensirion SHT15 digital humidity sensor giving ± 2%RH accuracy from 10%RH to 90%RH.
This logger is designed for indoor
use (IP 40). For outdoor applications, we recommend
mounting the THT-LCD in a TruTrack Seahorse Logger Enclosure.
For outdoor applications, we recommend mounting the THT-LCD in a TruTrack Seahorse Logger Enclosure.
|The probe is connected to a
socket on the end plate at the top of the logger.
The probe cable is 1.5 metres.
High Accuracy for
both Humidity and
|Filter||The sensor is covered in a
Sensirion SF1 Filter cap. The filter cap provides protection against water, dust and other
contaminants for the humidity and temperature sensor. The filter cap consists of a
single piece of polypropylene including a filter membrane. The filter provides
filtration efficiency of 99.99% of all 0.1µ m particles and has an optimized response time
of typically 30s (1/e (63%) slowly moving air).
|Sensor Type||The Dew Point is calculated from the current Relative Humidity and Temperature|
|Accuracy||± 2º C (this is determined by the ± 3.5%RH accuracy of the humidity sensor|
|Internal Logger Temperature:|
|Linear accuracy over range||± 0.3º C (0º C to 70º C)|
|Repeatability||± 0.1º C|
|Long term stability||± 0.1º C|
|Working Temperature||-20º C to +70º C|
|Storage Temperature||-30º C to +70º C|
|Download Time||9min 30sec for Full Logger|
|Case material||ABS Plastic|
|Size||130mm x 80mm x 30mm|
THT-LCD has a 8 pin Mini-DIN female socket.
A DLC8 download cable is required to connect the THT-LCD to a computer
The THT-LCD displays logger status and alarm status continuously and can be set to show the humidity, dew point, probe temperature, internal temperature, the battery voltage and the number of logged samples.
Logger status is shown as:
· Waiting (Waiting for Start on Condition)
· Waiting Trigger (Waiting for Start on Trigger)
If the logger is waiting for Start on Trigger it can be started in the field from the Menu provided on the display.
If an Alarm has been triggered the display will show
· Alarm 1
· Alarm 2
both Alarms are triggered Alarm
will be displayed
continuously and 1 and 2 will flash consecutively.
will be displayed if the internal batteries requires
THT-LCD Menu Options
button on the front panel of the THT-LCD
activates the Menu Display. The Down Arrow can then be used to scroll down through the various Menu Options. When the required menu option is displayed, press Enter to select this option. Menu Options on the THT-LCD are:
· Channel 1 (Display Relative Humidity)
· Channel 2 (Display Dew Point)
· Channel 3 (Display Probe Temperature)
· Channel 4 (Display Internal Temperature)
· Channel 5 (Display Battery Voltage)
· Samples (Display number of samples logged)
· Trigger (IF logger is waiting for Start on Trigger)
· Alarm 1 (Reset/Trigger) Trigger is used to test
· Alarm 2 (Reset/Trigger) the Alarms
· º C / º F toggle
The display will update at 1 second intervals for 1 minute after any button is pushed. It will then slow down to 10 second display updates (this is a power saving feature).