YSI TruLine 21 - Manual (Page 5)

TruLine Technical data
T 814240 04/2014 5
Technical data
General data
Model Reference
electrolyte Junction NTC Special features
TruLine 25 Gel Fiber No Plastic shaft
TruLine 26 Gel Fiber Yes Plastic shaft
TruLine 21 Polymer Hole No Combination electrode for cut-in
measurements
TruLine 27 Polymer Split ring No Combination electrode for surface
measurements
Measurement and application characteristics
Model pH mea-
suring
range Allowed
temperature range Membrane
resistance at 25 °C Typical application
TruLine 25 0 ... 14 0 ... 80 °C < 1 GOhm Field
TruLine 26 0 ... 14 0 ... 80 °C < 1 GOhm Field
TruLine 21 2 ... 13 0 ... 80 °C < 400 MOhm Laboratory / foods
TruLine 27 2 ... 13 0 ... 50 °C < 1 GOhm Laboratory
Shaft dimensions, shaft material, electrical connection
Model Shaft Electrical connection
Length
[mm] Ø [mm] Material Combination
electrode
connection Meter con-
nection Cable
length
TruLine 25 120 12 PPE/PS Fixed cable BNC 1 m
TruLine 26 120 12 PPE/PS Fixed cable BNC+banana 1 m
TruLine 21 65/25** 15/5** PPE/PS Fixed cable BNC 1 m
TruLine 27 120 12 Glass Fixed cable BNC 1 m
Commissioning, measuring, calibration
Commissioning Prepare the combination electrode for measuring as follows:
 Remove the watering cap from the electrode tip. Possible salt deposits in
the area of the watering cap do not affect the measuring characteristics
and can easily be removed with deionized water.
Note
Please keep the watering cap. It is required for the combination electrode to