GW Instek GOM-802 User Manual User Manual
Page 5
GOM-802 DC MILLI-OHM METER
USER MANUAL
⎯ ⎯
4
2. SPECIFICATIONS
The specifications are operated under the essential conditions as follows:
z A 1-year calibration cycle.
z An operating temperature of 18 to 28℃ (64.4 to 82.4℉).
z Relative humidity not exceeding 80%.
z Accuracy is expressed as ±(percentage of reading + digits).
z The instrument requires 30 minutes warm-up time to achieve rated
accuracy.
1. Resistance Measurement
30000 counts (speed : 7 times/second)
Range
Resolution
Measuring
Current
Accuracy
Open-terminal
Voltage
30m
1μ
1A approx.
0.1%+6*
300m
10μ
100mA
0.05%+6*
3
100μ
100mA
0.05%+3
30
1m
10mA
0.05%+2
300
10m
1mA
0.05%+2
3k
100m
100μA
0.05%+2
3V
30k
1
100μA
0.05%+2
300k
10
10μA
0.05%+2
3Meg
100
1μA
0.05%+2
4.8V
3000 counts Accuracy
(speed: 30 times/second)
±5 counts **
*When the instrument is set to 30mΩ or 300mΩ range, the resistance value will
be changed while connecting or disconnecting the test lead to the panel due to the
different temperature between internal and external of the instrument. Therefore,
it must wait 1 minute in order to obtain an accurate value after the test lead is
connected or disconnected.
* When use Kelvin clip to resume testing after long time ending, it needs more
time to wait for a stable value.
** In high speed mode, first assure that the instrument has been grounded through
power cord.
GOM-802 DC MILLI-OHM METER
USER MANUAL
⎯ ⎯
5
Measurement
Four-terminal method.
Auto-ranging
Provided.
Over input range
“OL” indication
Maximum Applied voltage
30m~3Ω range: 30VpDC
Other range: 100VpDC
Comparator
20 sets of comparator status can be selected.
Buzzer mode switchable
NON, PASS, FAIL
2.Temperature Measurement
Temperature sensor (option)
Platinum resistor.
Lead length: 1.5m approx.
Range
Accuracy
Speed: 7 times/second
Accuracy
Speed: 30 times/second
-9.9℃ ~ 39.9℃
0.3%+0.5℃
0.3%+2℃
-50.0℃ ~ -10.0℃
40℃ ~ 100℃
0.3%+1.0℃
0.3%+3℃
3. Temperature Correction Function
Temperature correction range 0.0℃~40.0℃
Reference temperature range 0℃~99.9℃
Thermal coefficient range
±9999 ppm
Temperature range
Accuracy of temperature compensation for
3930 ppm/Cu wire, speed: 7 times/second.*
0℃~39.9℃
0.3%+resistance measurement accuracy.
40℃~100℃
0.6%+resistance measurement accuracy.
* The temperature coefficiency for the other setting must be calculated individually
according to different conditions.
* If the temperature coefficiency or the difference between the environmental
temperature and the require temperature exceeds normal operation, after
compensation calculation, the variation of the reading value will be tremendous.