The ASM series (Advanced Signal Multi-scanner) is an 8-channel scanner controlled by JOFRACAL software through a PC.
Up to 3 ASM units can be stacked to calibrate up to 24 sensors at the same time.
It can handle signals from 2-, 3- and 4 wire RTD's, TC's, transmitters, thermistors, temperature switches and voltage.
The ASM800 series is designed for use where ever temperature measurement is critical and/or there is a need for traceable calibration documentation.
Easy, flexible and time-saving!

Basic versions
The ASM-series is available in 3 versions depending on the kind of sensors to be measured.

ASM-801 has 8 universal plugs. This is a fixed screw terminal solution used to measure RTD’s, TC’s, mA, voltage, ohm, and transmitters. It measures the cold junction (CJ) temperature for each channel and is able to supply a very accurate cold junction (CJ) temperature compensation.

ASM-802 has 8 small TC plugs for measurement of TC sensors. This modeI also measures the cold junction (CJ) temperature for each channel and is able to supply a very accurate cold junction (CJ) temperature compensation. 

ASM-803 has 8 LEMO plugs, which are primarily for measurement of RTD sensors. This solution makes it possible to measure current, voltage and ohm. It has built-in loop power supply for each channel.

Models
The ASM multi-scanner is made in an A and a B model. The ASM B model is the complete solution with integrated scan-ner and high accuracy multi signal measuring circuits. The ASM A model is less expensive and is designed to add 8 channel scanning capabilities to an existing instrument. The A model therefore needs the measuring capabilities from a JOFRA dry-block ATC B model, JOFRA ASC300 signal calibrator, DTI-1000 reference thermometer or an ASM B model.

A model
The A model use the measuring circuit of an existing instrument. This means that the normal set-up of the measuring equipment is used, and the multi-scanner then makes it possible to calibrate up to 8 sensors simultaneously. The built-in cold junction temperature measuring circuit ensures high accuracy when calibrating thermocouples. The A model is also capable of working without the JOFRACAL with a manual channel selector at the back. The A model may transmit an analogue signal of up to 8 sensors to one connected measuring device. It is able to transmit signals up to 30VDC, 30 mA.

Picture: ASM-803 A connected to the input´s of a JOFRA ATC B model and controlled by JOFRACAL.

B model
The B model has the same functions as the A model, but it differs as it is not necessary to include a measuring instrument in the set-up, as the multi-scanner has build-in measurement capabilities. The most important advantage of the B model is the fact that it is possible to obtain huge reductions in time of the calibration pro-cedure. The B model is able to perform several measurements each second, whereas the A model as an example will spend approx. 15 seconds on each measurement, when connected to an ATC B model. The B models is able to measure voltage up to 10V, resistance up to 4K and current up to 24mA.

Picture: ASM-803 B performing its own measurements in a JOFRA ITC-320 A including an STS reference sensor in channel one all controlled by JOFRACAL.

Use the ASM with your existing JOFRA instruments
Combine the ASM signal multi-scanner with any of your existing JOFRA dry-block or liquid bath calibrators. You can also use your JOFRA DTI reference thermometer or even the JOFRA ASC300 signal calibrator, which adds further value to your existing JOFRA equipment.

Applications
The ASM800 will fit into a lot of process industries and especially pharmaceutical, oil & gas and power plants. Original equipment manufacturers (OEM) will also benefit from calibrating and documenting multiple temperature sensors before final installation¨.