JUMO 60.8425 Contact dial thermometer with slow-break/magnetic snap-action contact Operating Manual - Handbuch (Seite 2)

Dial/
Contact dial
thermometers
Class 1
with slow-break/
magnetic snap-action
contact
B 60.8425.0.1
Operating
Instructions
09.05/00403311
4 Installation
Ambient temperatures
Dial thermometers exhibit the highest measurement accuracy at an ambient
temperature of +23°C at the case and capillary. Other ambient temperatures
will lead to indication errors. The corresponding influence on the housing or
capillary and the permissible ambient temperatures for storage and transport
can be taken from the appropriate data sheet.
Nominal operating position any
Arrangement of the capillary
❏ The capillary should not be run closely to sources of cold or heat.
❏ Protect the capillary from possible damage.
❏ Kinks or breaks in the capillary will disable the instrument.
❏ If the probe is subject to shock and vibration, the capillary should be
arranged in several loops between the last fixing point and the probe, so
that it can swing freely.
Probe installation
The temperature probe must be
so installed that its active portion
(marked length L) is completely
immersed in the medium to be
measured, otherwise a measure-
ment error will occur.
When deciding on the temperature probe location, the temperature distribu-
tion in the medium has to be taken into account.
When using protective pockets, the heat transfer resistance between the out-
side of the probe and the inner wall of the pocket can be reduced by filling it
with a thermal contact medium.
5 Operation
Setpoint adjustment
Setpoints can be adjusted by means of the rotary knob in the center of the
window.
With version “Setpoint adjustment by key”, the setpoints can be adjusted
through the adjustment lock (key is with the terminal box).
Indication correction
If the ambient temperature at the case and capillary deviates from the calib-
ration temperature (+23°C), there is a permanent error at constant ambient
temperatures, or a variable error under changing ambient temperatures, see
Installation/Ambient temperatures.
Dial thermometers with indication correction can be adjusted at constant am-
bient temperatures. The adjustment is made on the back using a screwdriver,
after removal of the closing plug.
Caution
❏ Do not expose the dial thermometer directly to corrosive
media. Take the protection rating into account when instal-
ling.
❏ If the thermometer is subject to strong shock and vibration, this
will impair the function and life of the instrument. The installation
site should therefore be largely free from vibration.
Minimum bending radius: 50 mm
hex
1 General
JUMO GmbH & Co. KG is a company which is certified according to ISO
9001. You have purchased a product which meets high requirements and ful-
fils, or surpasses, all the specifications listed.
Nevertheless, if you have any reason for complaint, please return the instru-
ment to us, with a detailed description of the fault you have observed.
These operating instructions do not cover all conceivable applications. So if
you cannot find advice on your particular task, please contact the nearest
subsidiary or the main factory.
None of the dial thermometers described in these operating instructions re-
quires any maintenance. They do not contain any components that can be re-
paired or replaced by the user. Repairs can only be carried out in the factory!
Please read these Operating Instructions before commissioning the
instrument.
Please assist us to improve these instructions, where necessary.
Your suggestions will be appreciated.
Phone:
+49 661 6003-0
Fax: +49 661 6003-607
If any difficulties should still arise during start-up, please do not un-
dertake any unauthorized manipulations on the instrument. This will
endanger your rights under the instrument warranty!
Please contact your supplier or the main factory in such a case.
2 Description
Dial thermometers with rigid stem or capillary are filled with an organic liquid
or with gas, and operate on the principle of liquid expansion or pressure
change. The resulting movement is converted into a rotation of the pointer,
without any gearing.
The built-in electrical limit signal contact (slow-break or magnetic snap-action
contact) is an auxiliary circuit switch which, depending on the direction of the
movement, opens or closes an electrical circuit at the set limits, by means of
a contact arm moving with the pointer.
Provided you observe the instructions below, you can be sure of problem-free
operation.
Accessories
The necessary accessories are inside a bag which is enclosed together with
the thermometer. Please check the package carefully!
3 Electrical connection
Wire up in accordance with the connection diagram (nameplate)!
Assembly of the terminal box
6-pole with earth terminal, conductor cross-section up to 2.5 mm 2 , suitable
for cable diameters 6.5 to 13 mm.
Recommended contact loading
Limits for contact loading
Danger
With dangerous measurement media such as oxygen, acetylene,
flammable and toxic substances, as well as in refrigeration equip-
ment, pressure vessels etc., the relevant regulations and require-
ments must be observed.
Danger
The electrical connection must only be carried out by qualified per-
sonnel.
The enclosure protection specified will only be achieved if the cable/
terminal box is mounted correctly.
0 ( 1 ) Cover screw (captive)
0 ( 2 ) Cover
0 ( 3 ) Funnel-shaped guide
0( 3 ) for adjustment key
0 ( 4 ) Sealing ring
0 ( 5 ) Screw-in gland
0 ( 6 ) Pressure washer
0 ( 7 ) Grooved ring
0 ( 8 ) Clamping cage
0 ( 9 ) Middle section
( 10 ) Sealing ring
( 11 ) Bottom section
( 12 ) Shaped seal
Voltage
AC / DC
Slow-break contact Magnetic snap-action contact
resistive
load
inductive
load
resistive
load
inductive
load
V
AC
mA
DC
mA p.f. > 0.7
mA
AC
mA
DC
mA p.f. > 0.7
mA
230 / 220 0 40 0 45 0 25 100 120 0 65
110 0 80 0 90 0 45 200 240 130
0 48 120 170 0 70 300 450 200
0 24 200 350 100 400 600 250
Slow-break contact Magnetic snap-action contact
Max. values Min. values Max. values Min. values
for contact loading with resistive load
Nom. operating
voltage U
r.m.s
250 V 24 V 250 V 24 V
Nom. operating
current:
switch-on curr.
switch-off curr.
cont. current 0.7 A
0.7 A
0.6 A
- - -
1.0 A
1.0 A
0.6 A
- - -
Contact rating 10 W / 18 VA 0.4 W / 0.4 VA 30 W / 50 V 0.4 W / 0.4 VA
JUMO GmbH & Co. KG
Delivery address: Moritz-Juchheim-Straße 1
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: +49 661 60 03-0
Fax: +49 661 60 03-6 07
e-mail: [email protected]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2TT, UK
Phone: +44 12 79 63 55 33
Fax:
+44 12 79 63 52 62
e-mail: [email protected]
Internet: www.jumo.co.uk
JUMO PROCESS CONTROL INC.
8 Technology Boulevard
Canastota, NY 13032, USA
Phone:
315-697-5866
1-800-554-JUMO
Fax: 315-697-5867
E-mail: [email protected]
Internet: www.jumo.us