Touch Sensitive Temperature Indicator
TM
SZ-7505T
Operating Instructions
Introduction :
The new SZ-7505T is the next generation of Subzero indicators. Their
IP ratings are greatly improved and have an excellent iconic display.
The touch feature whilst increasing reliability also gives a great user
experience.
Their operation is very user friendly and is easily understood with the
examples in the instructions below.
The SZ-7505T can be used as a indicator with a temperature range
O
O
from -45 C to 99 C. Calibration via keypad is possible.
CAUTION
WIRING:
The probe and its corresponding wires should
never be
installed in a conduit next to control or power
supply lines. The
electrical wiring should be done as shown in the diagram. The power
supply circuit should be connected to a protection switch. The
terminals admit wires of upto 2.5sq mm.
WARNING:
Improper wiring may cause irreparable damage and
personal injury. Kindly ensure that wiring is done by qualified
personnel only.
Maintenance:
Cleaning: Clean the surface of the indicator with a
soft moist cloth. Do not use abrasive detergents, petrol, alcohol or
solvents.
Notice:
The information in this document is
subject
to change in
order to improve reliability , design or function without prior notice and
does not represent
a commitment on the part of the company. In no
event will the company be liable for direct, indirect, special, incidental
or consequential damage arising out of the use or inability to use the
product or documentation, even if advised of the possibility of such
damages. No part of this manual may be reproduced or transmitted in
any form or by any means without the prior written permission of the
company.
Installation :
Fixing and dimensions of panel models:
To fix the unit, slide the fastener 1 through the guides 2 as per the
position shown in the figure. Move the fastener in the direction of the
arrow, pressing tab 3 it permits to move the fastener in the opposite
direction of the arrow.
Indicator
: Indicator should be installed in a place protected by
vibration, water and corrosive gasses and where ambient
temperature does not exceed the values specified in the technical
data.
Probe :
To give a correct reading, the probe must be installed in a
place protected from thermal influences, which may affect the
temperature to be controlled.
71mm
29mm
Panel cutout
3
1
2
36mm
59 mm
10mm
MAX
Panel Cutout and Dimensions :
Side Lock
Indicator
GASKET
PANEL
Suggested Wiring SZ-7505T (230Vac)
Caution:Wiring for 230Vac load only
TO SZ-T75
5
3
2
1
PROBE
230VAC
50-60Hz
PHASE
NEUTRAL
USER INTERFACE
UP
In Program mode:
Scroll through
parameters
&
parameter value.
Increases
Touch and hold for 2sec
to enter into
program mode.
In program mode:
Decreases parameter value
PRG
Down/
Program
In program mode :
set/save the changed value of parameter.
SET
Set
dd Parameter
2
Function : This parameter is used to delay
the display of temperature by the set in
this parameter.
Each value corresponds to 5 seconds, if the value is set to 1, it
corresponds to 5 seconds, if it is set to 2, it corresponds to 10
seconds and so on.
Min
Max
Fac.
0
36
0
For example, if this parameter is set to 1, temperature on the
display will be updated after 5 seconds. The same value will be
considered for calculation and logging.
Display delay parameter is applicable only when temperature
is increasing (rising). When temperature is decreasing (falling)
this parameter will not be applicable.
If this parameter is set to 0, this feature will be disabled.
PA Parameter
3
Min
Max
Fac.
-99
99
0
Function : To change Password.
User cannot enter into program mode, if correct password is
not entered.
If the password is kept other then 0, user need to enter correct
password to enter into program mode.
If password is 0, user can directly access program mode.
Min
Max
Fac.
10
O
C
-10
O
C
0
O
C
Function: To set probe calibration.
In time it may be possible that the display may be offset by a
degree or so.
To compensate for this error, user may need to add or minus
the degrees required to achieve the correct temperature.
O
Example :
The temperature on the display is 28 C, whereas
O
the actual temperature is 30 C. User will have to set the P5
parameter to 2, which means that once out of the programming
O
O
O
mode, the temperature on display will be 30 C (28 C+ 2 C).
Touch & hold
key for 2 seconds.
P5 Parameter
1
Parameter List :
Suggested Wiring SZ-7505T (12Vac/dc)
TO SZ-T75
5
3
2
1
PROBE
12V
ac/dc
Suggested Wiring SZ-7505T (24V
)
ac/dc
TO SZ-T75
5
3
2
1
PROBE
24V
ac/dc
Housing
:
Black ABS Plastic, Auto-extinguish
Front Cover
:
Polycarbonate Plastic
Dimensions
:
Frontal : 78 X 36mm,
Depth : 59mm
Panel Cutout
:
29 X 71mm
Mounting
:
Flush panel mounting with fasteners
Protection
:
IP65 Front (with gasket)
Connections
:
Screw terminal blocks.
<
2.5sq mm terminal only.
Display
:
2 X 17mm 7 segment display &
1 LED for Indication
Data storage
:
Non-volatile EEPROM memory
Power input
:
230 Vac ±15 %, 50-60Hz.
Others on request.
Operating temp.
:
0°C to 60°C (non-condensing)
Operating humidity :
20% to 85% (non-condensing)
Storage temp
:
-25°C to 60°C (non-condensing)
Measuring Range
:
-45°C to 99°C
Input
:
NTC probe, SZ-T75
Resolution
:
+/-
1°C
Accuracy
:
+/- 1°C
TECHNICAL DATA
Change Password
Keypad Lock
Restore factory defaults
End Programming
Delay the display of temperature.
INDEX
Sr.
No.
Para.
Description
1
3
4
5
6
7
P5
Probe calibration.
dd
PA
LP
FS
EP
Password Function
Temperature Logging
2
Operating Messages
Suggested Wiring SZ-7505T (48VDC)
TO SZ-T75
5
3
2
1
PROBE
48VDC
Suggested Wiring SZ-7505T (110Vac)
TO SZ-T75
5
3
2
1
PROBE
110Vac
