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AVS47-IB SPECIFICATIONS
Command summary (firmware version 3R4)
NOTE 1: All commands listed below are sequential
NOTE 2: All responses are single-line
NOTE 3: "c" means command and "q" means query
COMMANDS FOR THE AVS-47B
| REM | local/remote c/q |
| INP | input zero/measure/100 ohms calibrate c/q |
| MUX | multiplexer channel c/q |
| RAN | range c/q |
| EXC | nominal excitation voltage c/q |
| DIS | display selector c/q |
| REF | deviation reference voltage (command only) |
| RFS | reference source (query only) |
| MAG | difference magnifier (query only) |
| ARN | manual/autorange (by software) c/q |
| SDY | stabilisation delay c/q |
| ZDR | take reference from display (command only) |
| ADC | make one A/D conversion (command only) |
| ADC? | ask results of the latest ADC as integer (q) |
| RES? | ask results as resistance (q) |
| AVEn | record average on n A/D conversions (c) |
| STP | stop averaging immediately (c) |
| AVE? | ask for average resistance (q) |
| MIN? | ask for minimum (q) |
| MAX? | ask for maximum (q) |
| STD? | ask for standard deviation of resistance (q) |
| OVL? | ask if overload during last A/D conversion or average (q) |
COMMANDS FOR THE TS-530A
| SPT | set point (digital) (c/q) |
| PRO | proportional gain (c/q) |
| PRO15 | force error signal to zero (c) |
| ITC | integrator time constant (c/q) |
| DTC | derivator time constant (c/q) |
| BIA | bias power (c/q) |
| POW | heater power range (c/q) |
| SPV | measure/ask set point voltage (c/q) |
| HTV | measure/ask heater output voltage (c/q) |
| HTI | measure/ask heater output current (c/q) |
| HTP | measure and calculate/ask heater power (c/q) |
DIGITAL FILTER COMMANDS
| DFL | digital filter length (c/q) |
| DFS | start digital filter (c) |
| STP | stop digital filtering (c) |
| DFR | ask for a reading (q) |
SCANNING COMMANDS
| FCH | set the first channel to be scanned (c/q) |
| LCH | set the last channel to be scanned (c/q) |
| SCI | set the scanning interval (c/q) |
| ETC | enable simultaneous temp. control (c/q) |
| TCP | temperature control period (c/q) |
| SCPn | set channel parameters for channel n (c/q) |
| SDY | stabilisation delay (c/q) |
| CNT | average count (c/q) |
| EXC | excitation for channel n (c/q) |
| RAN | range for channel n (c/q) |
| SCNx | start to scan (0:single cycle, 1:front panel started mode, 2:continuous) (c) |
| STP | stop scanning immediately (c) |
| SCRx | Scan results command for channel x |
| AVE? | ask for average |
| MIN? | ask for minimum |
| MAX? | ask for maximum |
| STD? | ask for standard deviation |
GENERAL AVS47-IB COMMANDS
| TIM | set/get real time (c/q) |
| DAY | set/get real time date (c/q) |
| PRN | printer on/off (c/q) |
| DSK | ram-disk buffer on/off (c/q) |
| PBF | print buffer file (c) |
| STP | stop printing buffer file (c) |
| RBF | start reading buffer file (c) |
| NXT | give next line (q) |
| STP | stop reading buffer file immediately (q) |
| BUF | read buffer size and free space (q) |
| KIL | delete the buffer file (c) |
| DLYx | insert delay of x secods (c) |
| PONRST | simulates power-on reset, does not wipe the buffer (c) |
IEEE-488.2 COMMON COMMANDS AND QUERIES
| *IDN? | identification query (q) |
| *STB? | read status byte query (q) |
| *SRE | set/get service request enable mask (c/q) |
| *ESE | set/get standard event status register enable mask (c/q) |
| *CLS | clear status command (c) |
| *OPC | operation complete command and query (c/q) |
| *RST | device reset command (c) |
| *TST | self-test query (includes also the TS-530A) (q) |
MISCELLANEOUS COMMANDS
| IBA | IEEE-488 device address (c/q) |
| HDR | include message headers in responses (c/q) |
| PBA | picobus device address (default=1) (c/q) |
| PBD | picobus delay factor (default set by factory) (c/q) |
| LRS | measure and calculate appr. lead resistance (c/q) |
| SCAL | self-calibration macro command and query (c/q) |
| FSM | disable/enable front panel started measurement (c/q) |
| EWC | Eeprom write count query (q) |
SCANNING
Scanning is made using preselected excitation voltages for each sensor. Several A/D conversions can be averaged in order to get a better resolution. Switching between sensors is made in a sequence that prevents accidental overheating. Software autoranging can be used.
The TS-530A temperature controller can be connected to sensor No. 0. Because the AVS-47B Resistance Bridge can measure only one channel at a time, the controller is set automatically to a state where its heater output remains constant during the measurement of other sensors. Active control is enabled for a selectable period (TCP) between each channel to be scanned. Simultaneous scanning and control is suitable only in systems where thermal conditions remain reasonably stable.
PRINTING AND BUFFERING
Results can be buffered in a 64kB memory together with time stamps. The buffered results can be either printed on paper or read via the GBPI bus. Printing/reading is always sequential, starting from the first record. Measurement results can also be printed in real time to an LPT: printer by using the front panel START/PRINT switch.
DIGITAL FILTERING
The digital filter is a simple running average of a pre-set number of readings. An automatic re-start follows changes in settings, like selecting a new resistance range (autoranging). During digital filtering no other commands are accepted except STP (stop) and DFR (give digital filter reading).
DIGITAL CALIBRATION
The digital self-calibration procedure measures gain factors and offsets on all seven excitation ranges and uses this information to correct the readings. This feature is convenient it the AVS-47B suffers from large changes in operating temperature. Calibration data is volatile and calibration must be repeated whenever the AVS47-IB power has been off.
MECHANICAL DATA
Size: 210mm(W), 160mm(D), 65mm(H)
Weight: 1 kg
Mains voltage range: 90-250V 50-60Hz.
Back to AVS47-IB description
RV-ELEKTRONIIKKA OY PICOWATT
VEROMIEHENTIE 14
FI-01510 VANTAA
FINLAND
