Temperature and Relative Humidity Data Logger – HTL-804
Product Description :
HTL-804 – 8 Channel T + RH Data logger with 2 common High / Low Alarm relay outputs + 16 independent relay drivers + Real time clock + Built in data storage + RS-485 serial interface or RS-232 for serial Dot-matrix printer.
HTL-804-U1 – Uses Rotronic make HYGROCLIP-XD sensors.
HTL-804-U2 – Uses Libratherm make HTS-440 sensors.
HTL-804-U3 – Uses Libratherm make HTS-220 sensors.
HTL-804-U4 – Uses any type of T+RH Transmitters giving 4-20mA signals.
Technical Specifications :
| Parameters | Description |
|---|---|
| Parameter | Description |
| No. of channels | 8 nos. (4 Temperature + 4 %Rh) |
| Input type U1 | 0-1VDC proportional to Temperature and RH from Rotronic Hygroclip-XD |
| Input type U2 | Pt-100 + 0-3.3VDC proportional to Temperature and RH from HTS-440 |
| Input type U3 | Pt-100 + 0-3.3VDC proportional to Temperature and RH from HTS-220 |
| Input type U4 | 4-20mA proportional to Temperature and RH values - scalable |
| Range | For Temperature -40 to 60 oC (U1) or -20 to 80oC (U2) OR 0 to 60oC (U3) For RH 0 to 100%. |
| Accuracy | Better than ± 0.3?C for temperature using class A Pt-100 element |
| Better than +/-1% (U1), Better than +/-3% RH (U2 and U3) | |
| Display | 5 digit each 0.5" 7-segment Red /Green LED to indicate Temp and RH values, Alarm values and Real Time Clock and 2 digit 0.3 7-segment Red LED to display channel no. |
| Scan Rate | 1 to 99 sec (programmable through front panel keyboard) |
| Data Storage Interval | 1 to 99 minutes (user programmable). |
| Data Storage | 8000 records. (512KB). |
| Print Interval | 1 to 99 minutes (User programmable) |
| Skip/Hold Facility | Available through key board in configuration mode |
| High / Low Alarm | Common or individual Settable using key pad |
| Common Relay output | 2 nos. potential free change over contacts (1 each for high and low output but common for all the channels) |
| Alarms Outputs (Optional) | 8 x 2 open collector outputs to drive external relay cards. |
| 8 nos. for Temperature and 8 nos. for RH. | |
| LED Indication | 8 x dual colour LEDs in the front indicating status of each alarm output. |
| Serial Interface | RS-485 over MODBUS RTU protocol in the slave mode for PC interface or |
| RS-232 serial port for dot matrix printer interface | |
| (any one is available at a time) | |
| Supply | 90V - 260VAC VAC ± 10% (10VA), 50/60Hz or 24VDC/AC @ 200mA |
| Enclosure | Plastic enclosure with polycarbonate front graphic. |
| Size of DATALOG-804 | 96 x 96 x 160 mm. |
| Size of the Relay Card RLY-8 | 190 L x 120 W x 75 D mm (35 mm DIN rail mount) |