N Series Calibration Procedures

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-DIN, 8 -DIN & 16 -DIN Temperature Controllers - Input Calibration Procedure
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-DIN, 18 -DIN & 161 -DIN TEMPERATURE CONTROLLERS
INPUT CALIBRATION PROCEDURE
September 1996
NOTE: Calibration should be attempted only on Controllers on which calibration
errors have been encountered (see CALIBRATION CHECK) and should only be
performed by personnel who are technically competent and authorised to do so.
CALIBRATING THE UNIVERSAL INPUT
Equipment Required
1. Input source with an accuracy better than ±0.05% of reading:
(a) Thermocouple inputs - complete with 0oC reference facility, appropriate
thermocouple functions and compensating leads (or equivalent).
(b) DC linear inputs - 0 - 5V and 0 - 20mA.
(c) RTD inputs - decade resistance box with connections for three-wire input (or
equivalent)
2. Appropriate case assembly ( 41 -DIN, 81 -DIN or 161 -DIN) wired for appropriate input supply (90 - 264V
AC 50/60Hz, 20 - 50V AC 50/60Hz or 22 - 65V DC).
Calibration Procedure
1. Ensure that the Controller is powered-off and that the mains (line) lead is disconnected. On the
CPU PCB, fit the appropriate link jumpers (see Table 1 and Figure 1, Figure 2 or Figure 3 as appropriate to the type of Controller). Connect the appropriate input lead (see Figure 4 or Figure 5).
2. Connect the mains (line) lead to the Controller. Power-up the Controller and leave switched on for
five minutes (for RTD and DC Linear inputs) or 30 minutes (for thermocouple inputs), then powerdown.
3. Put the Controller in Calibration Mode by powering-up the Controller and, within 30 seconds of
power-up, holding down the Lower and Function keys simultaneously for approximately five seconds. The upper display will then show Input Type Number, in the form:
and the lower display will show:
Using the Raise/Lower keys, change the input type number as required (see Table 1).
NOTE: If required, only one input type may be calibrated. Exception: If it is required
to calibrate the thermocouple input (Input Type 5), it is necessary first to calibrate the
DC 0 - 50mV input (Input Type 1).
4. Press the Auto/Manual key to change the upper display to show:
After a few seconds, the upper display will either (a) return to the intial Input Type Number display if
calibration was successful, or (b) display:
In the latter case, the link jumpers and wiring should be checked.
CP0001
September 1996
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-DIN, 8 -DIN & 16 -DIN Temperature Controllers - Input Calibration Procedure
Table 1 Universal Input Type Selection
Input Type No.
1
2
3
4
5
Figure 1
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Input Type
DC - 0 - 50mV
DC 0 - 10V
DC 0 - 20mA
RTD Three-wire
Thermocouple
Link Jumper Settings
LJ3
LJ2
LJ1
Parked
Parked Parked
Parked
Parked
Fitted
Parked
Fitted
Parked
Parked
Parked Parked
Fitted
Parked Parked
Calibration Input
50mV DC
10V DC
20mA DC
200Ω
0oC “K”
-DIN Link Jumpers (Relay/SSR Output 1)
Figure 2
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-DIN Link Jumpers (DC Output 1)
Figure 4
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-DIN Universal Input Connections
RaPID
Controllers only
Figure 3
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-DIN/ 81 -DIN Series Link Jumpers
Figure 5
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-DIN/ 81 -DIN Universal Input Connections
September 1996
CP0001
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-DIN, 8 -DIN & 16 -DIN Temperature Controllers - Input Calibration Procedure
5. To calibrate all inputs, repeat Steps 1 to 4 for each of the other input types (see Table 1) until all five
input types have been successfully calibrated.
NOTE: Input Type 5 should be calibrated using the appropriate Type K
compensating lead (between Terminals 2 & 3 on 41 -DIN/ 81 -DIN Controllers, Terminals
4 & 5 on 161 -DIN Controllers,). The Controller should be powered-up and remain
powered up for at least 30 minutes with this lead connected before the input is
calibrated.
The universal input calibration procedure is now complete.
CALIBRATING THE SECONDARY ANALOGUE INPUT (RaPID CONTROLLERS ONLY)
Equipment Required
1. DC linear input source (0 - 5V and 0 - 20mA) with an accuracy better than ±0.05% of reading.
2. Appropriate case assembly ( 41 -DIN or 81 -DIN) wired for appropriate input supply (90 - 264V AC
50/60Hz, 20 - 50V AC 50/60Hz or 22 - 65V DC).
Calibration Procedure
1. Ensure that the Controller is powered-off and that the mains (line) lead is disconnected. On the
CPU PCB, configure link jumpers LJ10 and LJ11 (see Table 2 and Figure 3). Connect the remote setpoint input lead (see Figure 6).
2. Connect the mains (line) lead to the Controller. Power-up the Controller and leave switched on for
five minutes, then power-down.
3. Put the Controller in Calibration Mode by powering-up the Controller and, within 30 seconds of
power-up, holding down the Lower and Function keys simultaneously for approximately five seconds. The upper display will then show Input Type Number, in the form:
and the lower display will show:
Using the Raise/Lower keys, change the input type number as required (see Table 2).
NOTE: If required, only one input type may be calibrated.
4. Press the Auto/Manual key to change the upper display to show:
After a few seconds, the upper display will either (a) return to the intial Input Type Number display if
calibration was successful, or (b) display:
In the latter case, the link jumpers and wiring should be checked.
5. To calibrate all inputs, repeat Steps 1 to 4 for each of the other input types (see Table 2) until all
three secondary analogue input types have been successfully calibrated.
CP0001
September 1996
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-DIN, 8 -DIN & 16 -DIN Temperature Controllers - Input Calibration Procedure
Table 2 Secondary Analogue Input Type Selection
Input Type No.
7
8
9
Input Type
Remote Setpoint, Linear DC mV
Remote Setpoint, Linear DC V
Remote Setpoint, Linear DC mA
Link Jumper Settings
Calibration Input
LJ11
LJ10
50mV DC
Parked Parked
10V DC
Fitted
Parked
20mA DC
Parked
Fitted
NOTE: No calibration is required if the secondary analogue input is to be used
as a Remote Setpoint Potentiometer input or for Dual Setpoint switching.
Figure 6
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-DIN/ 81 -DIN Controllers - Secondary Analogue Input
EXIT FROM CALIBRATION MODE
To exit from Calibration Mode, press the Lower and Function keys simultaneously.
NOTE: An automatic exit is made from Calibration Mode if there is no key activity for
two minutes.
CALIBRATION CHECK
1. Set the Controller to the required configuration (using link jumpers and front panel entry) as described in the appropriate Product Manual.
3. Power-up the Controller and leave it powered-up for at least five minutes (for RTD and DC linear inputs) or at least 30 minutes (for thermocouple inputs).
2. After the appropriate delay for stabilisation has elapsed, check the calibration by connecting the
appropriate input source and checking a number of cardinal points.
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September 1996
CP0001
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