User Manual

4
V General Inspection
When you get a new DS203 oscilloscope, it’s suggested to inspect the product by following steps.
1．Inspect for damage caused by shipping.
If the packaging carton or protection pad is seriously damaged, keep the package until you check the
oscilloscope & accessories electrically and mechanically.
2．Inspect the oscilloscope
Please contact us if following problems occur: (1) surface of device is damaged; (2) device can’t work well;
(3) device doesn’t pass performance test
If damage is resulted from shipping, please keep the container & inform the shipping department/others
responsible for this service.
VI Functional Inspection
Make a quick functional inspection to ensure this device works well. Please perform following steps:
1． Turn on power supply; access the homepage of the oscilloscope.
2． Connect the oscilloscope with standard signals (e.g.: square wave 20KHz, Vpp=5V); Set the switch on
probe tip as 1X, plug oscilloscope probe to CH_A.
Check whether the measured values are consistent with standard values. It can be calibrated if the margin is
narrow. Same for CH_B, CH_C & CH_D.
VII Firmware Upgrade
To upgrade the firmware, please perform following steps:
1. Open Web to access www.minidso.com, download the latest firmware of your oscilloscope to your PC.
2. Simultaneously press || of DS203 and turn on power supply, enter DFU firmware upgrade mode.
3. Use USB to connect DS203 to your PC, A removable disk named “DFU V3_10_D” will appear on your
PC. Copy the firmware to the root directory of this disk then restart DS203, thus firmware is upgraded.