Unit functions
Page 32 RESM-5
Only the 300°C and 500°C temperature ranges appear
at this actual value output. If a temperature range of
200°C is set with step 205 in the Configuration menu, it
appears at this output in the 0…300°C range. The
400°C temperature range is indicated as 0…500°C.
An indicating instrument can be connected to this
output in order to visualize the temperature of the
heatsealing band.
The characteristics of the ROPEX ATR-x temperature
meter (size, scaling, dynamic response) are ideally
suited to this application ( section 4 "Accessories and
modifications" on page 11).
The meter not only facilitates SET-ACTUAL
comparisons but also enables other criteria such as the
heating rate, set point reached within the specified
time, cooling of the heatsealing band etc. to be
evaluated.
The temperature meter additionally permits
disturbances in the control loop (loose connections,
contacting or wiring problems) as well as any line
disturbances to be observed extremely effectively and
interpreted accordingly. The same applies if several
neighboring control loops interfere with one another.
If an alarm is indicated, this analog output is used to
show a selective error message in addition to the value
on the display ( section 9.18 "Error messages" on
page 37).
9.8 Automatic zero calibration
(AUTOCAL)
Owing to the automatic zero calibration (AUTOCAL)
function, there is no need to adjust the zero point
manually on the RESISTRON monitoring device. This
function adjusts the RESM-5 to the current and voltage
signals that are present in the system. This function can
be activated in two ways:
• By means of a 24VDC signal at terminals 5+14.
• By selecting step 107 in the Settings menu and
pressing the "ENTER" key
You can activate this function by selecting step 107 in
the Settings menu and then pressing the "ENTER" key.
The current base temperature (ambient temperature) of
the sealing bar(s) that is required for calibration can be
preset in the 0…40°C range using the "UP" and
"DOWN" keys.
The zero point is calibrated to 20°C at the factory.
The automatic calibration takes around
10…15 seconds. The heatsealing band is not heated
during this process.
The message "- Calibration - Please wait..." appears
on the display while the "AUTOCAL" function is exe-
cuting and a counter counts down from 15 to 0. The
actual value output (terminals 17+14) changes to
0…3°C (i.e. 0 VDC) as long as it is counting.
If the temperature of the heatsealing band varies, the
"AUTOCAL" function is executed a maximum of three
times. If the function still cannot be terminated
0 - 500°C range
12345678910
500
0.4V
°C
VDC
Temperature
T
"ZERO"
RESM-5
max. 6mA
5
14
AUTOCAL
+
-
GND
24VDC
AUTOCAL
0.1…5s
HIGH:
≥ 12VDC
LOW:
≤ 2VDC
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