YSI 550 DO, Руководство по эксплуатации

Страница: 12 / 32

YSI Incorporated YSI 550 DO Handheld Instrument 10
3.7 HOW TO REPLACE THE DO PROBE TIP
The YSI 559 Replaceable DO Module Kit includes:
Quantity Item
1 Instruction Sheet
1 5906 Membrane Kit
1 Sensor, DO Module
1 Set Screw 4-40x 1/2 long
1 Hex key Wrench, .050”
DO SENSOR REPLACEMENT
Along with the YSI 559 dissolved oxygen module, a YSI 5906 membrane kit, the set screw that
holds the sensor in place, YSI supplies a hex key wrench to help install the probe, and an instruction
sheet. See Figure 6.
1. Remove probe guard.
2. IMPORTANT: Thoroughly dry the sensor so that no water enters the probe port when the
sensor is removed.
3. Insert the long end of the hex key wrench into the small hole in the side of the DO sensor
module (see figure 1). Turn the wrench counter clockwise and remove the screw. (You do not
have to remove the screw all the way to release the sensor.)
4. Pull the DO sensor out of the module. The DO sensor is keyed, or has a flat side, so that it can
not be removed improperly.
5. Insert the new probe. Make sure that the inside of the module, and the o-ring of the sensor are
clean, with no contaminants, such as grease, dirt, or hair. The DO sensor is keyed, or has a flat
side, so that it can not be installed improperly.
6a. IF you did not remove the screw all the way in Step 3: Use the hex key wrench to tighten the
screw in properly, making sure that the screw does not stick out on either side of the DO sensor
module.
6b. IF you removed the screw all the way in Step 3: Insert the set screw into the small hole in the
side of the DO sensor module, and turn clockwise to rethread.