Samon DT 300, Руководство пользователя

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6 / 32 IS DT300 200928
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DT300
English
1. Function
The instrument consists of two parts, a base unit with display, batteries, and an interchangeable sensor module.
The sensor modules are available for various gases and ranges. The sensor module is factory calibrated and
has an expiry date.
DT300 is an instrument to be used with:
- Detectors type GD/GS/GSR/GR/GK/GSH-24/230, GXR-24/230, GEX, MP
- Monitoring unit type SPU/SPLS-24/230, MPU2/4/6
DT300 Instrument can be used as follows:
- Determine the environment of the actual detector (units with SC-sensors only).
- Verify offset-value when changing sensor head (units with SC-sensors only).
-
Measure sensor signal during ”bump-test”, or when using reference gas
- Check / altering of the alarm thresholds
2. Cautions and Warnings
Altering of set point, and adjustments shall be carried out by trained personnel only, who has
adequate knowledge of the products. Incorrect handling may cause that the system becomes
inoperative.
3. Specifications
Display Alphanumeric LCD display, LED indicator of battery level.
Measurements WxHxD: 100x165x44mm
Weight 365g (inclusive batteries)
Power supply 4 x AA alkalis (8h) or chargeable Ni-MH (10h) batteries
4. Start of DT300
The instrument is switched on via the on/off button on the left side of the unit. At start up the letter
“W” will be
flashing on the left side of “Ref sensor” value. The letter “W” indicates that the sensor is warming up. Check that
this “Ref-value” is stabilized before to use the instrument. No adjustment is to be carried out before that the
indication has extinct. See Fig. 5.
5. Control of the Ref-sensor offset (Sensor module)
To control the status of the Ref-sensor, one should start the instrument in a possible clean environment, e.g.
outside.
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The “zero”-value of the sensor is defined as the signal (VDC) when in clean air
By that, it is normal that the signal varies in various environments, and also due to temperature and humidity.
The output is normally higher during summer than winter.
The acceptable variation is given in the data sheet of the specific sensor. The factory set sensor module, does
normally not require any adjustment. Although, a small “drift” can occur due to environment and the frequency of
use. See Fig. 8.
- If the value shown in the display is within the green area , no adjustments is required
- If the value shown in the display is within the orange area, the value should be adjusted
- If the value shown in the display is within the red area, the sensor has to be replaced
If the value in the display increases when entering a plant room e.g., this indicates that there
are substances present that effects the sensor. This value is to be the reference value for the
detectors within this perimeter.