F-900 Instruction Manual rev. 1/16/2014
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone (360) 833-8835 Fax (360) 833-1914
[email protected] http://www.felixinstruments.com
54
CLEANING AND MAINTENANCE OF THE F-900
The F-900 housing can be wiped down with a damp cloth if the unit becomes dirty or dusty. Please
make sure to always keep the IN and OUT ports on the front panel clear from any obstructions.
The water in the electrochemical cell of the unit needs to be refilled periodically using distilled
water. The hours of use between refills will depend on the humidity and temperature of the
environment the F-900 is typically used in. Warm or low humidity/dry environments will required
more frequent refills. Please contact
for more information or to
schedule instrument servicing.
Refilling the Electrochemical Sensor
The liquid reservoir must contain a sufficient amount of electrolyte at all times. The electrocatalytic
sensor operates utilizing water and therefore requires replenishment of the electrolyte solution (1
ml/day while operating using continuous mode). Depending on the mode of operation and the
environment in which it is used, the sensor cell may need to be replenished with distilled water
every 2-3 weeks if Chamber In (B) is not set to ON and filled with distilled water. The electrolyte
level should be monitored on regular basis and prior to operation for an extended period of time.
The analyzer will arrive filled with the proper electrolyte.
Only refill with distilled water.
Refilling is needed on a regular basis if the unit is being run with
dry gas and Chamber In is not on and filled with water. If Chamber In (B) is run continuously with
distilled water, the level of water in the sensor should not change very much and the levels need
only be checked every 6 months.
Check the sensor every 2-3 weeks if run continuously in very dry environments (<20% RH). It is
recommended to refill the sensor before the liquid level drops 20 ml. How often the reservoir
needs to be refilled will depend on the conditions the instrument is used in (temperature, relative
humidity). The red port on the sensor is used for refilling. The red plug in the port is removed and a
syringe inserted (provided with the instrument).
Note:
A dry gas being fed into the F-900 at 25
0
C will cause an expected water loss of 0.1 ml/hr; at 30
0
C a dry
gas will cause a loss of 0.3 ml/hr. Expected water loss can be up to 3 ml/day when feeding dry gas through
the F-900.
