rototherm rth temperature & humidity recorder User Manual
RTH100 Series Temperature & Humidity Recorder
Instruction Manual
Page 8
8
Adjustments
The instrument is calibrated and factory set against traceable standards before despatch. The only adjustment available is zero
adjustment see Fig's. 7 and 8.
adjustment see Fig's. 7 and 8.
Temperature and Humidity accuracy can be checked by the use of Thermometers or Whirling Hygrometers.
Zero Adjustment
If a careful check against a known and steady conditions shows the pen reading to be in error, this can be corrected by means of
the zero nut (Z).
the zero nut (Z).
Fig 7. Temperature Arrangement
Fig 8. Humidity Arrangement
Remote and Re-entry
Remote and re-entry models are calibrated under working conditions and are factory set against traceable standards before
despatch. The only adjustment available is zero adjustment see Fig's 7 and 8.
despatch. The only adjustment available is zero adjustment see Fig's 7 and 8.
No adjustment should be made to the recorder unless it has been running for a period of at least 3
hours. This period of time ensures that the internal temperature of the recorder case has stabilised and
the true environmental conditions are being recorded.
hours. This period of time ensures that the internal temperature of the recorder case has stabilised and
the true environmental conditions are being recorded.
Maintenance
Keep the instrument clean and treat with care. If the instrument is being used in dusty environments it is advisable to periodically
check if dust and particles are accumulating around the direct linkage arrangement. If there is an accumulation in these areas, it
should be removed with either a low pressure air line or a fine brush.
check if dust and particles are accumulating around the direct linkage arrangement. If there is an accumulation in these areas, it
should be removed with either a low pressure air line or a fine brush.
In the event of heavy contamination of dust it is also advisable to remove the sensing element cover and carefully remove the con-
tamination from the hygroscopic membrane and bimetallic coil. A check on calibration as detailed on page 7 is advisable.
tamination from the hygroscopic membrane and bimetallic coil. A check on calibration as detailed on page 7 is advisable.
Spare Parts
Description
Part Number
Relay Board Assembly - Single Control
29442-04
Relay Board Assembly - Double Control
29251-04
Power Supply Board
29233-04
Pen Pack-Red
28676-11
Pen Pack-Blue
28677-11
Charts
Reference number on chart