MONIMET Temperature-Monitor
Monimet 
Temperature-Sensor/Transmitter Type GMM 10.10.xxx
Temperature-Monitor Type GMM 10.10.xxx
I M1 Ex ia I Ma- Linearized measured value display from –20.0...+60.0 °C
- Platinum-resistance element PT 100 for a maximum of stability
- Low response time results of special form of the sensor element
- The sensor can be replaced on site
- Data processing by microcontroller system
- Illuminated four-digit display
- Fault self diagnosis with alpha numeric display
- Adjustments or status enquiries by means of a press button unit or a magnetic pointer. The housing need not be opened
- Code lock to prevent unauthorized manipulation (can be switched off)
- Output range of the output signal is variable
- Test of the output signal by simulated values
- Choice between normed analog or digital output signals (optional)
- Two built-in limit switches with optocouplers or relays in the monitor
- Special housing suited to the working conditions in mines and industry
- Housing protection rating IP65
The economical, permanently installed temperature-sensor/transmitter and temperature-monitor are characterised by their stable measurements, simple and secure operation, robustness and compact construction.
The surroundings temperature is registered in the sensor block according to the change in the resistance of the platinum-resistor. The special design of the sensor block results in a quick response to the temperature changes.
These devices conform to the explosion protection rating of intrinsic safety „i“, catagory I M1 Ex ia I Ma. This means that this device can be used in the zone M1 of underground mines, even when unpermitted high concentrations of the methane gas are prevailing.
This certification conforms to the ATEX directive 94/9/EG for devices and protective systems permitted for use in areas endangered by explosions.
The temperature-monitor differs from the temperature-sensor/transmitter because of an additional limit value unit which is equipped with optocouplers or relays.
The operation of the device is very simple: The operator places a small magnetic press button unit on the device. The housing need not be opened. As an alternative he can also use a magnetic pointer. A four digit code which can be entered initially, protects against unauthorized changing of the set values. A self monitoring microcontroller system not only processes the measurement values precisely, it also carries out the operator specific instructions such as the entry of the code, signal instructions and messages, analog and
digital outputs and test functions etc. A four digit back lit graphic display shows the measured values in 12 mm high digits.
These devices are protected against shocks, dust and humidity by a cast metal housing (impact strength 20 Joule) and are to be connected by means of a plug-in connector. The sensor block with the temperature-sensor is attached on the lower side of the housing and it can be replaced easily on the underground site.
A steel hanger is attached for the suspension of the device. For a rigid mounting, the device can be provided with thread holes on its rear (extra charge).
