Sper Scientific 800024 Thermometer 4 Channel Datalogger - Manual (Page 6)

5
TX
RX
GND
3: press "REC"
• or "°C/°F" • to increase or decrease number,
press “MAXMIN " (INTV) to adjust next item, then press “MAXMIN”
(INTV) to finish. If you want abort during a setup process, press
power button to cancel.
4.9 MAX/MIN Operation:
When pressing the "MAX MIN" button the meter will enter the MAX/MIN mode. Under this mode the
maximum value, minimum value is kept in the memory simultaneously and updated with every new
sample of data.
When the MAX symbol is display, the Maximum is shown on the display.
Press "MAX MIN" again, then the MIN symbol is on the display and also the minimum reading.
Press "MAX MIN" again, MAX, and MIN will blink together. This means that all these data is
updated in the memory and the reading is the present temperature.
One may press "MAX MIN" to circulate the display mode among these options.
When the meter is under "MAX MIN" operation and “ °C/°F ” button are disabled.(when you press
“ °C/°F ” button in "MAX MIN" mode, there will be two continuous beep)
To exit the MAX/MIN mode, one may press and hold "MAX MIN" for two seconds.
4.10 Auto Power Off:
By default, when the meter is powered on, it is under auto power off mode. The meter will power
itself off after 30 minutes if no key operation and no RS232 communication combination at power on
can disable auto power off.
One may press and hold “HOLD” button and then power on the meter and there will be two
successive beeps to indicate that auto power off is disabled and the will not show up.
4.11 Low Battery Condition
When the battery voltage is under proper operation requirement, the symbol will show on the
LCD and the battery need to be replaced with new one.
4.12 Calibration Point:
input Adjust VR tolerance
0 °C VR1 ± 0.1 °C
190 °C VR2 ± 0.1 °C
1000 °C VR3 ± 1 °C
1900 °F VR4 ± 1 °F
4.13 Digital Output:
The Digital Output is a 9600bps N 81 serial interface.
The RX is a 5V normal high input port.
The TX is a 5V normal high output port.
V. Setup TestLink SE-309 —RS232 interface software:
The TestLink package contains:
1.80mm CD.
2.Custom designed RS232 cable for TestLink.
System Required:
Windows 95 or Windows 98 or Windows NT 4.0 above.
Minimum Hardware Required:
PC or NoteBook with Pentium 90MHz or higher, 32 MB
P.S
Normally, performing offset Calibration with thermal
stabled ice water through VR1 will give a very good
calibration result.