KROHNE BM 100A EN - Manual (Page 12)

12 Installation and operating instructions BM 100 A
Cable probes: entanglement and straightness
The cable must be straight once inserted into the tank. The cable counterweight should not touch
the bottom of the tank. The cable must be far from objects (e.g. agitators) to avoid entanglement.
Rigid length of single and twin cable probes
Cable diameter
Rigid length
Single cable
Ø4mm or 0.15”
145mm or 5¾”
Ø8mm or 0.3” 200mm or 8”
Twin cable
Ø4mm or 0.15”
145mm or 5¾”
Ø6mm or 0.24” 145mm or 5¾”
1.3.4 Installation
instructions: Gauge - liquid applications
This sub-section covers the installation of each probe type and recommendations for liquid
applications.
Special attention should be paid to probe bending in agitated products (tanks with agitators, ships’
tanks and eddy currents) in liquid applications. See also diagram on the following page.
Probe bending in agitated products: recommended solutions
Probe (Type)
Supports and fastenings Stilling well installation*
Twin rod (A)
Weld a 45mm / 1.8” internal diameter tube on
the bottom of the vessel.
Twin cable (L) Fit an anchor with an M10 x 1thread e.g.
spring ring or hook underneath the
counterweight. A turnbuckle may also be
selected when ordering the cable.
CAUTION: 6 Nm / 4.4 lbf.ft maximum torque.
Possible. On-site calibration may
be required to maintain accuracy.
Repeatability is unaffected.
Centring the probe is
recommended. Contact KROHNE
for more information***.
Single rod (F) Weld a 12mm / 0.5” internal diameter tube on
the bottom of the vessel, insert the rod**. Possible: 50 mm / 2” minimum
diameter chamber. Contact
KROHNE for assistance***.
Single cable (H) Fit an anchor M10x1 (Ø4mm cable) thread
e.g. spring ring or hook. A chuck or
turnbuckle may also be selected when
ordering the cable.
CAUTION: 4 Nm / 2.9 lbf.ft maximum torque.
Possible: 50 mm / 2” diameter
minimum. Contact KROHNE for
assistance**.
Coaxial (D) Weld a 30-32mm / 1.2” internal diameter tube
on the bottom of the vessel, insert the tube. A
probe may be fixed with braces. Unnecessary: probe unaffected
by nearby objects.
* Reference (bypass) chamber or stilling well.
** Contact KROHNE. A factory menu function may need to be changed.
*** A list of KROHNE offices are supplied on the last page of these instructions.